+//
+// System.Data/DataSet.cs
+//
+// Author:
+// Christopher Podurgiel <cpodurgiel@msn.com>
+// Daniel Morgan <danmorg@sc.rr.com>
+// Rodrigo Moya <rodrigo@ximian.com>
+// Stuart Caborn <stuart.caborn@virgin.net>
+// Tim Coleman (tim@timcoleman.com)
+// Ville Palo <vi64pa@koti.soon.fi>
+// Atsushi Enomoto <atsushi@ximian.com>
+//
+// (C) Ximian, Inc. 2002
+// Copyright (C) Tim Coleman, 2002, 2003
+//
+
using System;
+using System.Collections;
+using System.ComponentModel;
+using System.Globalization;
+using System.Threading;
+using System.IO;
+using System.Runtime.Serialization;
+using System.Xml;
+using System.Xml.Schema;
+using System.Xml.Serialization;
+using System.Data.Common;
+
+namespace System.Data {
-namespace WindowsApplication1.Mono
-{
- /// <summary>
- /// Summary description for DataSet.
- /// </summary>
- public class DataSet
+ [ToolboxItem (false)]
+ [DefaultProperty ("DataSetName")]
+ [Serializable]
+ public class DataSet : MarshalByValueComponent, IListSource,
+ ISupportInitialize, ISerializable, IXmlSerializable
{
- public DataSet()
+ private string dataSetName;
+ private string _namespace = "";
+ private string prefix;
+ private bool caseSensitive;
+ private bool enforceConstraints = true;
+ private DataTableCollection tableCollection;
+ private DataRelationCollection relationCollection;
+ private PropertyCollection properties;
+ private DataViewManager defaultView;
+ private CultureInfo locale = System.Threading.Thread.CurrentThread.CurrentCulture;
+ internal XmlDataDocument _xmlDataDocument = null;
+
+ #region Constructors
+
+ public DataSet () : this ("NewDataSet")
+ {
+ }
+
+ public DataSet (string name)
+ {
+ dataSetName = name;
+ tableCollection = new DataTableCollection (this);
+ relationCollection = new DataRelationCollection.DataSetRelationCollection (this);
+ properties = new PropertyCollection ();
+ this.prefix = String.Empty;
+
+ this.Locale = CultureInfo.CurrentCulture;
+ }
+
+ [MonoTODO]
+ protected DataSet (SerializationInfo info, StreamingContext context) : this ()
+ {
+ throw new NotImplementedException ();
+ }
+
+ #endregion // Constructors
+
+ #region Public Properties
+
+ [DataCategory ("Data")]
+ [DataSysDescription ("Indicates whether comparing strings within the DataSet is case sensitive.")]
+ [DefaultValue (false)]
+ public bool CaseSensitive {
+ get {
+ return caseSensitive;
+ }
+ set {
+ caseSensitive = value;
+ if (!caseSensitive) {
+ foreach (DataTable table in Tables) {
+ foreach (Constraint c in table.Constraints)
+ c.AssertConstraint ();
+ }
+ }
+ }
+ }
+
+ [DataCategory ("Data")]
+ [DataSysDescription ("The name of this DataSet.")]
+ [DefaultValue ("")]
+ public string DataSetName {
+ get { return dataSetName; }
+ set { dataSetName = value; }
+ }
+
+ [DataSysDescription ("Indicates a custom \"view\" of the data contained by the DataSet. This view allows filtering, searching, and navigating through the custom data view.")]
+ [Browsable (false)]
+ public DataViewManager DefaultViewManager {
+ get {
+ if (defaultView == null)
+ defaultView = new DataViewManager (this);
+ return defaultView;
+ }
+ }
+
+ [DataSysDescription ("Indicates whether constraint rules are to be followed.")]
+ [DefaultValue (true)]
+ public bool EnforceConstraints {
+ get { return enforceConstraints; }
+ set {
+ if (value != enforceConstraints) {
+ enforceConstraints = value;
+ if (value) {
+ foreach (DataTable table in Tables) {
+ // first assert all unique constraints
+ foreach (UniqueConstraint uc in table.Constraints.UniqueConstraints)
+ uc.AssertConstraint ();
+ // then assert all foreign keys
+ foreach (ForeignKeyConstraint fk in table.Constraints.ForeignKeyConstraints)
+ fk.AssertConstraint ();
+ }
+ }
+ }
+ }
+ }
+
+ [Browsable (false)]
+ [DataCategory ("Data")]
+ [DataSysDescription ("The collection that holds custom user information.")]
+ public PropertyCollection ExtendedProperties {
+ get { return properties; }
+ }
+
+ [Browsable (false)]
+ [DataSysDescription ("Indicates that the DataSet has errors.")]
+ public bool HasErrors {
+ [MonoTODO]
+ get {
+ for (int i = 0; i < Tables.Count; i++) {
+ if (Tables[i].HasErrors)
+ return true;
+ }
+ return false;
+ }
+ }
+
+ [DataCategory ("Data")]
+ [DataSysDescription ("Indicates a locale under which to compare strings within the DataSet.")]
+ public CultureInfo Locale {
+ get {
+ return locale;
+ }
+ set {
+ if (locale == null || !locale.Equals (value)) {
+ // TODO: check if the new locale is valid
+ // TODO: update locale of all tables
+ locale = value;
+ }
+ }
+ }
+
+ public void Merge (DataRow[] rows)
+ {
+ Merge (rows, false, MissingSchemaAction.Add);
+ }
+
+ public void Merge (DataSet dataSet)
+ {
+ Merge (dataSet, false, MissingSchemaAction.Add);
+ }
+
+ public void Merge (DataTable table)
+ {
+ Merge (table, false, MissingSchemaAction.Add);
+ }
+
+ public void Merge (DataSet dataSet, bool preserveChanges)
+ {
+ Merge (dataSet, preserveChanges, MissingSchemaAction.Add);
+ }
+
+ [MonoTODO]
+ public void Merge (DataRow[] rows, bool preserveChanges, MissingSchemaAction missingSchemaAction)
+ {
+ if (rows == null)
+ throw new ArgumentNullException ("rows");
+ if (!IsLegalSchemaAction (missingSchemaAction))
+ throw new ArgumentOutOfRangeException ("missingSchemaAction");
+
+ MergeManager.Merge (this, rows, preserveChanges, missingSchemaAction);
+ }
+
+ [MonoTODO]
+ public void Merge (DataSet dataSet, bool preserveChanges, MissingSchemaAction missingSchemaAction)
+ {
+ if (dataSet == null)
+ throw new ArgumentNullException ("dataSet");
+ if (!IsLegalSchemaAction (missingSchemaAction))
+ throw new ArgumentOutOfRangeException ("missingSchemaAction");
+
+ MergeManager.Merge (this, dataSet, preserveChanges, missingSchemaAction);
+ }
+
+ [MonoTODO]
+ public void Merge (DataTable table, bool preserveChanges, MissingSchemaAction missingSchemaAction)
+ {
+ if (table == null)
+ throw new ArgumentNullException ("table");
+ if (!IsLegalSchemaAction (missingSchemaAction))
+ throw new ArgumentOutOfRangeException ("missingSchemaAction");
+
+ MergeManager.Merge (this, table, preserveChanges, missingSchemaAction);
+ }
+
+ private static bool IsLegalSchemaAction (MissingSchemaAction missingSchemaAction)
+ {
+ if (missingSchemaAction == MissingSchemaAction.Add || missingSchemaAction == MissingSchemaAction.AddWithKey
+ || missingSchemaAction == MissingSchemaAction.Error || missingSchemaAction == MissingSchemaAction.Ignore)
+ return true;
+ return false;
+ }
+
+ [DataCategory ("Data")]
+ [DataSysDescription ("Indicates the XML uri namespace for the root element pointed at by this DataSet.")]
+ [DefaultValue ("")]
+ public string Namespace {
+ get { return _namespace; }
+ set {
+ //TODO - trigger an event if this happens?
+ if (value != this._namespace)
+ RaisePropertyChanging ("Namespace");
+ _namespace = value;
+ }
+ }
+
+ [DataCategory ("Data")]
+ [DataSysDescription ("Indicates the prefix of the namespace used for this DataSet.")]
+ [DefaultValue ("")]
+ public string Prefix {
+ get { return prefix; }
+ set {
+ // Prefix cannot contain any special characters other than '_' and ':'
+ for (int i = 0; i < value.Length; i++) {
+ if (!(Char.IsLetterOrDigit (value [i])) && (value [i] != '_') && (value [i] != ':'))
+ throw new DataException ("Prefix '" + value + "' is not valid, because it contains special characters.");
+ }
+
+
+ if (value == null)
+ value = string.Empty;
+
+ if (value != this.prefix)
+ RaisePropertyChanging ("Prefix");
+ prefix = value;
+ }
+ }
+
+ [DataCategory ("Data")]
+ [DataSysDescription ("The collection that holds the relations for this DatSet.")]
+ [DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
+ public DataRelationCollection Relations {
+ get {
+ return relationCollection;
+ }
+ }
+
+ [Browsable (false)]
+ [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
+ public override ISite Site {
+ [MonoTODO]
+ get {
+ throw new NotImplementedException ();
+ }
+
+ [MonoTODO]
+ set {
+ throw new NotImplementedException ();
+ }
+ }
+
+ [DataCategory ("Data")]
+ [DataSysDescription ("The collection that holds the tables for this DataSet.")]
+ [DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
+ public DataTableCollection Tables {
+ get { return tableCollection; }
+ }
+
+ #endregion // Public Properties
+
+ #region Public Methods
+
+ [MonoTODO]
+ public void AcceptChanges ()
+ {
+ foreach (DataTable tempTable in tableCollection)
+ tempTable.AcceptChanges ();
+ }
+
+ public void Clear ()
+ {
+ if (_xmlDataDocument != null)
+ throw new NotSupportedException ("Clear function on dataset and datatable is not supported on XmlDataDocument.");
+ for (int t = 0; t < tableCollection.Count; t++) {
+ tableCollection[t].Clear ();
+ }
+ }
+
+ public virtual DataSet Clone ()
+ {
+ DataSet Copy = new DataSet ();
+ CopyProperties (Copy);
+
+ foreach (DataTable Table in Tables) {
+ Copy.Tables.Add (Table.Clone ());
+ }
+
+ //Copy Relationships between tables after existance of tables
+ //and setting properties correctly
+ CopyRelations (Copy);
+
+ return Copy;
+ }
+
+ // Copies both the structure and data for this DataSet.
+ public DataSet Copy ()
+ {
+ DataSet Copy = new DataSet ();
+ CopyProperties (Copy);
+
+ // Copy DatSet's tables
+ foreach (DataTable Table in Tables)
+ Copy.Tables.Add (Table.Copy ());
+
+ //Copy Relationships between tables after existance of tables
+ //and setting properties correctly
+ CopyRelations (Copy);
+
+ return Copy;
+ }
+
+ private void CopyProperties (DataSet Copy)
+ {
+ Copy.CaseSensitive = CaseSensitive;
+ //Copy.Container = Container
+ Copy.DataSetName = DataSetName;
+ //Copy.DefaultViewManager
+ //Copy.DesignMode
+ Copy.EnforceConstraints = EnforceConstraints;
+ if(ExtendedProperties.Count > 0) {
+ // Cannot copy extended properties directly as the property does not have a set accessor
+ Array tgtArray = Array.CreateInstance( typeof (object), ExtendedProperties.Count);
+ ExtendedProperties.Keys.CopyTo (tgtArray, 0);
+ for (int i=0; i < ExtendedProperties.Count; i++)
+ Copy.ExtendedProperties.Add (tgtArray.GetValue (i), ExtendedProperties[tgtArray.GetValue (i)]);
+ }
+ Copy.Locale = Locale;
+ Copy.Namespace = Namespace;
+ Copy.Prefix = Prefix;
+ //Copy.Site = Site; // FIXME : Not sure of this.
+
+ }
+
+
+ private void CopyRelations (DataSet Copy)
+ {
+
+ //Creation of the relation contains some of the properties, and the constructor
+ //demands these values. instead changing the DataRelation constructor and behaviour the
+ //parameters are pre-configured and sent to the most general constructor
+
+ foreach (DataRelation MyRelation in this.Relations) {
+ string pTable = MyRelation.ParentTable.TableName;
+ string cTable = MyRelation.ChildTable.TableName;
+ DataColumn[] P_DC = new DataColumn[MyRelation.ParentColumns.Length];
+ DataColumn[] C_DC = new DataColumn[MyRelation.ChildColumns.Length];
+ int i = 0;
+
+ foreach (DataColumn DC in MyRelation.ParentColumns) {
+ P_DC[i]=Copy.Tables[pTable].Columns[DC.ColumnName];
+ i++;
+ }
+
+ i = 0;
+
+ foreach (DataColumn DC in MyRelation.ChildColumns) {
+ C_DC[i]=Copy.Tables[cTable].Columns[DC.ColumnName];
+ i++;
+ }
+
+ DataRelation cRel = new DataRelation (MyRelation.RelationName, P_DC, C_DC);
+ //cRel.ChildColumns = MyRelation.ChildColumns;
+ //cRel.ChildTable = MyRelation.ChildTable;
+ //cRel.ExtendedProperties = cRel.ExtendedProperties;
+ //cRel.Nested = MyRelation.Nested;
+ //cRel.ParentColumns = MyRelation.ParentColumns;
+ //cRel.ParentTable = MyRelation.ParentTable;
+
+ Copy.Relations.Add (cRel);
+ }
+ }
+
+
+
+
+ public DataSet GetChanges ()
+ {
+ return GetChanges (DataRowState.Added | DataRowState.Deleted | DataRowState.Modified);
+ }
+
+
+ public DataSet GetChanges (DataRowState rowStates)
{
- //
- // TODO: Add constructor logic here
- //
+ if (!HasChanges (rowStates))
+ return null;
+
+ DataSet copySet = Clone ();
+ Hashtable addedRows = new Hashtable ();
+
+ IEnumerator tableEnumerator = Tables.GetEnumerator ();
+ DataTable origTable;
+ DataTable copyTable;
+ while (tableEnumerator.MoveNext ()) {
+ origTable = (DataTable)tableEnumerator.Current;
+ copyTable = copySet.Tables[origTable.TableName];
+
+ // Look for relations that have this table as child
+ IEnumerator relations = origTable.ParentRelations.GetEnumerator ();
+
+ IEnumerator rowEnumerator = origTable.Rows.GetEnumerator ();
+ while (rowEnumerator.MoveNext ()) {
+ DataRow row = (DataRow)rowEnumerator.Current;
+
+ if (row.IsRowChanged (rowStates))
+ AddChangedRow (addedRows, copySet, copyTable, relations, row);
+ }
+ }
+ return copySet;
+ }
+
+ void AddChangedRow (Hashtable addedRows, DataSet copySet, DataTable copyTable, IEnumerator relations, DataRow row)
+ {
+ if (addedRows.ContainsKey (row)) return;
+
+ relations.Reset ();
+ while (relations.MoveNext ()) {
+ DataRow parentRow = row.GetParentRow ((DataRelation) relations.Current);
+ if (parentRow == null || addedRows.ContainsKey (parentRow)) continue;
+ DataTable parentCopyTable = copySet.Tables [parentRow.Table.TableName];
+ AddChangedRow (addedRows, copySet, parentCopyTable, parentRow.Table.ParentRelations.GetEnumerator (), parentRow);
+ }
+
+ DataRow newRow = copyTable.NewRow ();
+ copyTable.Rows.Add (newRow);
+ row.CopyValuesToRow (newRow);
+ newRow.XmlRowID = row.XmlRowID;
+ addedRows.Add (row,row);
}
- public DataSet(string dataSetName);
+#if NET_1_2
+ [MonoTODO]
+ public DataTableReader GetDataReader (DataTable[] dataTables)
+ {
+ throw new NotImplementedException ();
+ }
- protected DataSet(SerializationInfo info, StreamingContext context);
+ [MonoTODO]
+ public DataTableReader GetDataReader ()
+ {
+ throw new NotImplementedException ();
+ }
+#endif
+
+ public string GetXml ()
+ {
+ StringWriter Writer = new StringWriter ();
- public bool CaseSensitive {get; set;}
+ // Sending false for not printing the Processing instruction
+ WriteXml (Writer, XmlWriteMode.IgnoreSchema);
+ return Writer.ToString ();
+ }
- public string DataSetName {get; set;}
+ public string GetXmlSchema ()
+ {
+ StringWriter Writer = new StringWriter ();
+ WriteXmlSchema (Writer);
+ return Writer.ToString ();
+ }
- public DataViewManager DefaultViewManager {get;}
+ [MonoTODO]
+ public bool HasChanges ()
+ {
+ return HasChanges (DataRowState.Added | DataRowState.Deleted | DataRowState.Modified);
+ }
- public bool EnforceConstraints {get; set;}
+ [MonoTODO]
+ public bool HasChanges (DataRowState rowState)
+ {
+ if (((int)rowState & 0xffffffe0) != 0)
+ throw new ArgumentOutOfRangeException ("rowState");
- public PropertyCollection ExtendedProperties {get;}
+ DataTableCollection tableCollection = Tables;
+ DataTable table;
+ DataRowCollection rowCollection;
+ DataRow row;
- public bool HasErrors {get;}
+ for (int i = 0; i < tableCollection.Count; i++) {
+ table = tableCollection[i];
+ rowCollection = table.Rows;
+ for (int j = 0; j < rowCollection.Count; j++) {
+ row = rowCollection[j];
+ if ((row.RowState & rowState) != 0)
+ return true;
+ }
+ }
- public CultureInfo Locale {get; set;}
+ return false;
+ }
- public string Namespace {get; set;}
+ [MonoTODO ("Consider ignored namespace array")]
+ public void InferXmlSchema (XmlReader reader, string[] nsArray)
+ {
+ XmlDataLoader Loader = new XmlDataLoader (this);
+ Loader.LoadData (reader, XmlReadMode.InferSchema);
+ }
- public string Prefix {get; set;}
+ public void InferXmlSchema (Stream stream, string[] nsArray)
+ {
+ InferXmlSchema (new XmlTextReader (stream), nsArray);
+ }
- public DataRelationCollection Relations {get;}
+ public void InferXmlSchema (TextReader reader, string[] nsArray)
+ {
+ InferXmlSchema (new XmlTextReader (reader), nsArray);
+ }
- public override ISite Site {get; set;}
+ public void InferXmlSchema (string fileName, string[] nsArray)
+ {
+ XmlTextReader reader = new XmlTextReader (fileName);
+ try {
+ InferXmlSchema (reader, nsArray);
+ } finally {
+ reader.Close ();
+ }
+ }
+
+#if NET_1_2
+ [MonoTODO]
+ public void Load (IDataReader reader, LoadOption loadOption, DataTable[] tables)
+ {
+ throw new NotImplementedException ();
+ }
+
+ [MonoTODO]
+ public void Load (IDataReader reader, LoadOption loadOption, string[] tables)
+ {
+ throw new NotImplementedException ();
+ }
+#endif
+
+ public virtual void RejectChanges ()
+ {
+ int i;
+ bool oldEnforceConstraints = this.EnforceConstraints;
+ this.EnforceConstraints = false;
+
+ for (i = 0; i < this.Tables.Count;i++)
+ this.Tables[i].RejectChanges ();
+
+ this.EnforceConstraints = oldEnforceConstraints;
+ }
+
+ public virtual void Reset ()
+ {
+ IEnumerator constraintEnumerator;
+
+ // first we remove all ForeignKeyConstraints (if we will not do that
+ // we will get an exception when clearing the tables).
+ for (int i = 0; i < Tables.Count; i++) {
+ ConstraintCollection cc = Tables[i].Constraints;
+ for (int j = 0; j < cc.Count; j++) {
+ if (cc[j] is ForeignKeyConstraint)
+ cc.Remove (cc[j]);
+ }
+ }
+
+ Clear ();
+ Relations.Clear ();
+ Tables.Clear ();
+ }
+
+ public void WriteXml (Stream stream)
+ {
+ XmlTextWriter writer = new XmlTextWriter (stream, null);
+ writer.Formatting = Formatting.Indented;
+ WriteXml (writer);
+ }
+
+ ///<summary>
+ /// Writes the current data for the DataSet to the specified file.
+ /// </summary>
+ /// <param name="filename">Fully qualified filename to write to</param>
+ public void WriteXml (string fileName)
+ {
+ XmlTextWriter writer = new XmlTextWriter (fileName, null);
+ writer.Formatting = Formatting.Indented;
+ writer.WriteStartDocument (true);
+ try {
+ WriteXml (writer);
+ }
+ finally {
+ writer.WriteEndDocument ();
+ writer.Close ();
+ }
+ }
- public DataTableCollection Tables {get;}
+ public void WriteXml (TextWriter writer)
+ {
+ XmlTextWriter xwriter = new XmlTextWriter (writer);
+ xwriter.Formatting = Formatting.Indented;
+ WriteXml (xwriter);
+ }
+
+ public void WriteXml (XmlWriter writer)
+ {
+ WriteXml (writer, XmlWriteMode.IgnoreSchema);
+ }
+
+ public void WriteXml (string filename, XmlWriteMode mode)
+ {
+ XmlTextWriter writer = new XmlTextWriter (filename, null);
+ writer.Formatting = Formatting.Indented;
+ writer.WriteStartDocument (true);
+
+ try {
+ WriteXml (writer, mode);
+ }
+ finally {
+ writer.WriteEndDocument ();
+ writer.Close ();
+ }
+ }
+
+ public void WriteXml (Stream stream, XmlWriteMode mode)
+ {
+ XmlTextWriter writer = new XmlTextWriter (stream, null);
+ writer.Formatting = Formatting.Indented;
+ WriteXml (writer, mode);
+ }
+
+ public void WriteXml (TextWriter writer, XmlWriteMode mode)
+ {
+ XmlTextWriter xwriter = new XmlTextWriter (writer);
+ xwriter.Formatting = Formatting.Indented;
+ WriteXml (xwriter, mode);
+ }
+
+ public void WriteXml (XmlWriter writer, XmlWriteMode mode)
+ {
+ if (mode == XmlWriteMode.DiffGram) {
+ SetRowsID();
+ WriteDiffGramElement(writer);
+ }
+
+ string ns = Namespace == null ? String.Empty : Namespace;
+
+ WriteStartElement (writer, mode, ns, Prefix, XmlConvert.EncodeName (DataSetName));
+
+ if (mode == XmlWriteMode.WriteSchema) {
+ DoWriteXmlSchema (writer);
+ }
+
+ WriteTables (writer, mode, Tables, DataRowVersion.Default);
+ if (mode == XmlWriteMode.DiffGram) {
+ writer.WriteEndElement (); //DataSet name
+ if (HasChanges(DataRowState.Modified | DataRowState.Deleted)) {
+
+ DataSet beforeDS = GetChanges (DataRowState.Modified | DataRowState.Deleted);
+ WriteStartElement (writer, XmlWriteMode.DiffGram, XmlConstants.DiffgrNamespace, XmlConstants.DiffgrPrefix, "before");
+ WriteTables (writer, mode, beforeDS.Tables, DataRowVersion.Original);
+ writer.WriteEndElement ();
+ }
+ }
+ writer.WriteEndElement (); // DataSet name or diffgr:diffgram
+ }
+
+ public void WriteXmlSchema (Stream stream)
+ {
+ XmlTextWriter writer = new XmlTextWriter (stream, null );
+ writer.Formatting = Formatting.Indented;
+ WriteXmlSchema (writer);
+ }
+
+ public void WriteXmlSchema (string fileName)
+ {
+ XmlTextWriter writer = new XmlTextWriter (fileName, null);
+ writer.Formatting = Formatting.Indented;
+ writer.WriteStartDocument (true);
+ try {
+ WriteXmlSchema (writer);
+ }
+ finally {
+ writer.WriteEndDocument ();
+ writer.Close ();
+ }
+ }
+
+ public void WriteXmlSchema (TextWriter writer)
+ {
+ XmlTextWriter xwriter = new XmlTextWriter (writer);
+ xwriter.Formatting = Formatting.Indented;
+ WriteXmlSchema (xwriter);
+ }
+
+ public void WriteXmlSchema (XmlWriter writer)
+ {
+ //Create a skeleton doc and then write the schema
+ //proper which is common to the WriteXml method in schema mode
+ DoWriteXmlSchema (writer);
+ }
+
+ public void ReadXmlSchema (Stream stream)
+ {
+ XmlReader reader = new XmlTextReader (stream, null);
+ ReadXmlSchema (reader);
+ }
+
+ public void ReadXmlSchema (string str)
+ {
+ XmlReader reader = new XmlTextReader (str);
+ try {
+ ReadXmlSchema (reader);
+ }
+ finally {
+ reader.Close ();
+ }
+ }
+
+ public void ReadXmlSchema (TextReader treader)
+ {
+ XmlReader reader = new XmlTextReader (treader);
+ ReadXmlSchema (reader);
+ }
+
+ public void ReadXmlSchema (XmlReader reader)
+ {
+#if true
+ new XmlSchemaDataImporter (this, reader);
+#else
+ XmlSchemaMapper SchemaMapper = new XmlSchemaMapper (this);
+ SchemaMapper.Read (reader);
+#endif
+ }
+ public XmlReadMode ReadXml (Stream stream)
+ {
+ return ReadXml (new XmlTextReader (stream));
+ }
+
+ public XmlReadMode ReadXml (string str)
+ {
+ XmlTextReader reader = new XmlTextReader (str);
+ try {
+ return ReadXml (reader);
+ }
+ finally {
+ reader.Close ();
+ }
+ }
+
+ public XmlReadMode ReadXml (TextReader reader)
+ {
+ return ReadXml (new XmlTextReader (reader));
+ }
+
+ public XmlReadMode ReadXml (XmlReader r)
+ {
+ return ReadXml (r, XmlReadMode.Auto);
+ }
+
+ public XmlReadMode ReadXml (Stream stream, XmlReadMode mode)
+ {
+ return ReadXml (new XmlTextReader (stream), mode);
+ }
+
+ public XmlReadMode ReadXml (string str, XmlReadMode mode)
+ {
+ XmlTextReader reader = new XmlTextReader (str);
+ try {
+ return ReadXml (reader, mode);
+ }
+ finally {
+ reader.Close ();
+ }
+ }
+
+ public XmlReadMode ReadXml (TextReader reader, XmlReadMode mode)
+ {
+ return ReadXml (new XmlTextReader (reader), mode);
+ }
+
+ [MonoTODO]
+ public XmlReadMode ReadXml (XmlReader reader, XmlReadMode mode)
+ {
+ switch (reader.ReadState) {
+ case ReadState.EndOfFile:
+ case ReadState.Error:
+ case ReadState.Closed:
+ return mode;
+ }
+ // Skip XML declaration and prolog
+ reader.MoveToContent();
+ if (reader.EOF)
+ return mode;
+
+ XmlReadMode Result = mode;
+
+ // If diffgram, then read the first element as diffgram
+ if (reader.LocalName == "diffgram" && reader.NamespaceURI == XmlConstants.DiffgrNamespace) {
+ switch (mode) {
+ case XmlReadMode.Auto:
+ case XmlReadMode.DiffGram:
+ XmlDiffLoader DiffLoader = new XmlDiffLoader (this);
+ DiffLoader.Load (reader);
+ // (and leave rest of the reader as is)
+ return XmlReadMode.DiffGram;
+ case XmlReadMode.Fragment:
+ reader.Skip ();
+ // (and continue to read)
+ break;
+ default:
+ reader.Skip ();
+ // (and leave rest of the reader as is)
+ return mode;
+ }
+ }
+ // If schema, then read the first element as schema
+ if (reader.LocalName == "schema" && reader.NamespaceURI == XmlSchema.Namespace) {
+ switch (mode) {
+ case XmlReadMode.IgnoreSchema:
+ case XmlReadMode.InferSchema:
+ reader.Skip ();
+ // (and break up read)
+ return mode;
+ case XmlReadMode.Fragment:
+ ReadXmlSchema (reader);
+ // (and continue to read)
+ break;
+ case XmlReadMode.Auto:
+ if (Tables.Count == 0) {
+ ReadXmlSchema (reader);
+ return XmlReadMode.ReadSchema;
+ } else {
+ // otherwise just ignore and return IgnoreSchema
+ reader.Skip ();
+ return XmlReadMode.IgnoreSchema;
+ }
+ default:
+ ReadXmlSchema (reader);
+ // (and leave rest of the reader as is)
+ return mode; // When DiffGram, return DiffGram
+ }
+ }
+ // Otherwise, read as dataset... but only when required.
+ switch (mode) {
+ case XmlReadMode.Auto:
+ case XmlReadMode.InferSchema:
+ case XmlReadMode.Fragment:
+ break;
+ default:
+ reader.Skip ();
+ return mode;
+ }
+ XmlDataLoader Loader = new XmlDataLoader (this);
+ return Loader.LoadData (reader, mode);
+ }
+ #endregion // Public Methods
+
+ #region Public Events
+
+ [DataCategory ("Action")]
+ [DataSysDescription ("Occurs when it is not possible to merge schemas for two tables with the same name.")]
+ public event MergeFailedEventHandler MergeFailed;
+
+ #endregion // Public Events
+
+ #region Destructors
+
+ ~DataSet ()
+ {
+ }
+
+ #endregion Destructors
+
+ #region IListSource methods
+ IList IListSource.GetList ()
+ {
+ return DefaultViewManager;
+ }
+
+ bool IListSource.ContainsListCollection {
+ get {
+ return true;
+ }
+ }
+ #endregion IListSource methods
+
+ #region ISupportInitialize methods
+ public void BeginInit ()
+ {
+ }
+
+ public void EndInit ()
+ {
+ }
+ #endregion
+
+ #region ISerializable
+ void ISerializable.GetObjectData (SerializationInfo si, StreamingContext sc)
+ {
+ throw new NotImplementedException ();
+ }
+ #endregion
+
+ #region Protected Methods
+ protected void GetSerializationData (SerializationInfo info, StreamingContext context)
+ {
+ string s = info.GetValue ("XmlDiffGram", typeof (String)) as String;
+ if (s != null) ReadXmlSerializable (new XmlTextReader (new StringReader (s)));
+ }
+
+
+ protected virtual System.Xml.Schema.XmlSchema GetSchemaSerializable ()
+ {
+ return null;
+ }
+
+ protected virtual void ReadXmlSerializable (XmlReader reader)
+ {
+ ReadXml (reader, XmlReadMode.DiffGram); // FIXME
+ }
+
+ void IXmlSerializable.ReadXml (XmlReader reader)
+ {
+
+ ReadXmlSerializable(reader);
+
+ // the XmlSerializationReader does this lines!!!
+ //reader.MoveToContent ();
+ //reader.ReadEndElement (); // </DataSet>
+ }
+
+ void IXmlSerializable.WriteXml (XmlWriter writer)
+ {
+ DoWriteXmlSchema (writer);
+ WriteXml (writer, XmlWriteMode.DiffGram);
+ }
+
+ protected virtual bool ShouldSerializeRelations ()
+ {
+ return true;
+ }
+
+ protected virtual bool ShouldSerializeTables ()
+ {
+ return true;
+ }
+
+ [MonoTODO]
+ protected internal virtual void OnPropertyChanging (PropertyChangedEventArgs pcevent)
+ {
+ }
+
+ [MonoTODO]
+ protected virtual void OnRemoveRelation (DataRelation relation)
+ {
+ }
+
+ [MonoTODO]
+ protected virtual void OnRemoveTable (DataTable table)
+ {
+ }
+
+ protected internal virtual void OnMergeFailed (MergeFailedEventArgs e)
+ {
+ if (MergeFailed != null)
+ MergeFailed (this, e);
+ }
+
+ [MonoTODO]
+ protected internal void RaisePropertyChanging (string name)
+ {
+ }
+ #endregion
+
+ #region Private Xml Serialisation
+
+ private string WriteObjectXml (object o)
+ {
+ switch (Type.GetTypeCode (o.GetType ())) {
+ case TypeCode.Boolean:
+ return XmlConvert.ToString ((Boolean) o);
+ case TypeCode.Byte:
+ return XmlConvert.ToString ((Byte) o);
+ case TypeCode.Char:
+ return XmlConvert.ToString ((Char) o);
+ case TypeCode.DateTime:
+ return XmlConvert.ToString ((DateTime) o);
+ case TypeCode.Decimal:
+ return XmlConvert.ToString ((Decimal) o);
+ case TypeCode.Double:
+ return XmlConvert.ToString ((Double) o);
+ case TypeCode.Int16:
+ return XmlConvert.ToString ((Int16) o);
+ case TypeCode.Int32:
+ return XmlConvert.ToString ((Int32) o);
+ case TypeCode.Int64:
+ return XmlConvert.ToString ((Int64) o);
+ case TypeCode.SByte:
+ return XmlConvert.ToString ((SByte) o);
+ case TypeCode.Single:
+ return XmlConvert.ToString ((Single) o);
+ case TypeCode.UInt16:
+ return XmlConvert.ToString ((UInt16) o);
+ case TypeCode.UInt32:
+ return XmlConvert.ToString ((UInt32) o);
+ case TypeCode.UInt64:
+ return XmlConvert.ToString ((UInt64) o);
+ }
+ if (o is TimeSpan) return XmlConvert.ToString ((TimeSpan) o);
+ if (o is Guid) return XmlConvert.ToString ((Guid) o);
+ if (o is byte[]) return Convert.ToBase64String ((byte[])o);
+ return o.ToString ();
+ }
+
+ private void WriteTables (XmlWriter writer, XmlWriteMode mode, DataTableCollection tableCollection, DataRowVersion version)
+ {
+ //Write out each table in order, providing it is not
+ //part of another table structure via a nested parent relationship
+ foreach (DataTable table in tableCollection) {
+ bool isTopLevel = true;
+ foreach (DataRelation rel in table.ParentRelations) {
+ if (rel.Nested) {
+ isTopLevel = false;
+ break;
+ }
+ }
+
+ if (isTopLevel) {
+ WriteTable ( writer, table, mode, version);
+ }
+ }
+ }
+
+ private void WriteTable (XmlWriter writer, DataTable table, XmlWriteMode mode, DataRowVersion version)
+ {
+ DataRow[] rows = new DataRow [table.Rows.Count];
+ table.Rows.CopyTo (rows, 0);
+ WriteTable (writer, rows, mode, version);
+ }
+
+ private void WriteTable (XmlWriter writer, DataRow[] rows, XmlWriteMode mode, DataRowVersion version)
+ {
+ //The columns can be attributes, hidden, elements, or simple content
+ //There can be 0-1 simple content cols or 0-* elements
+ System.Collections.ArrayList atts;
+ System.Collections.ArrayList elements;
+ DataColumn simple = null;
+
+ if (rows.Length == 0) return;
+ DataTable table = rows[0].Table;
+ SplitColumns (table, out atts, out elements, out simple);
+ //sort out the namespacing
+ string nspc = table.Namespace.Length > 0 ? table.Namespace : Namespace;
+
+ foreach (DataRow row in rows) {
+ if (!row.HasVersion(version) ||
+ (mode == XmlWriteMode.DiffGram && row.RowState == DataRowState.Unchanged
+ && version == DataRowVersion.Original))
+ continue;
+
+ // First check are all the rows null. If they are we just write empty element
+ bool AllNulls = true;
+ foreach (DataColumn dc in table.Columns) {
+
+ if (row [dc.ColumnName, version] != DBNull.Value) {
+ AllNulls = false;
+ break;
+ }
+ }
+
+ // If all of the columns were null, we have to write empty element
+ if (AllNulls) {
+ writer.WriteElementString (table.TableName, "");
+ continue;
+ }
+
+ WriteTableElement (writer, mode, table, row, version);
+
+ foreach (DataColumn col in atts) {
+ WriteColumnAsAttribute (writer, mode, col, row, version);
+ }
+
+ if (simple != null) {
+ writer.WriteString (WriteObjectXml (row[simple, version]));
+ }
+ else {
+ foreach (DataColumn col in elements) {
+ WriteColumnAsElement (writer, mode, nspc, col, row, version);
+ }
+ }
+
+ foreach (DataRelation relation in table.ChildRelations) {
+ if (relation.Nested) {
+ WriteTable (writer, row.GetChildRows (relation), mode, version);
+ }
+ }
+
+ writer.WriteEndElement ();
+ }
+
+ }
+
+ private void WriteColumnAsElement (XmlWriter writer, XmlWriteMode mode, string nspc, DataColumn col, DataRow row, DataRowVersion version)
+ {
+ string colnspc = nspc;
+ object rowObject = row [col, version];
+
+ if (rowObject == null || rowObject == DBNull.Value)
+ return;
+
+ if (col.Namespace != null) {
+ colnspc = col.Namespace;
+ }
+
+ //TODO check if I can get away with write element string
+ WriteStartElement (writer, mode, colnspc, col.Prefix, col.ColumnName);
+ writer.WriteString (WriteObjectXml (rowObject));
+ writer.WriteEndElement ();
+ }
+
+ private void WriteColumnAsAttribute (XmlWriter writer, XmlWriteMode mode, DataColumn col, DataRow row, DataRowVersion version)
+ {
+ WriteAttributeString (writer, mode, col.Namespace, col.Prefix, col.ColumnName, row[col, version].ToString ());
+ }
+
+ private void WriteTableElement (XmlWriter writer, XmlWriteMode mode, DataTable table, DataRow row, DataRowVersion version)
+ {
+ //sort out the namespacing
+ string nspc = table.Namespace.Length > 0 ? table.Namespace : Namespace;
+
+ WriteStartElement (writer, mode, nspc, table.Prefix, table.TableName);
+
+ if (mode == XmlWriteMode.DiffGram) {
+ WriteAttributeString (writer, mode, XmlConstants.DiffgrNamespace, XmlConstants.DiffgrPrefix, "id", table.TableName + (row.XmlRowID + 1));
+ WriteAttributeString (writer, mode, XmlConstants.MsdataNamespace, XmlConstants.MsdataPrefix, "rowOrder", row.XmlRowID.ToString());
+ string modeName = null;
+ if (row.RowState == DataRowState.Modified)
+ modeName = "modified";
+ else if (row.RowState == DataRowState.Added)
+ modeName = "inserted";
+
+ if (version != DataRowVersion.Original && modeName != null)
+ WriteAttributeString (writer, mode, XmlConstants.DiffgrNamespace, XmlConstants.DiffgrPrefix, "hasChanges", modeName);
+ }
+ }
+
+ private void WriteStartElement (XmlWriter writer, XmlWriteMode mode, string nspc, string prefix, string name)
+ {
+ writer.WriteStartElement (prefix, name, nspc);
+ }
+
+ private void WriteAttributeString (XmlWriter writer, XmlWriteMode mode, string nspc, string prefix, string name, string stringValue)
+ {
+ switch ( mode) {
+ case XmlWriteMode.WriteSchema:
+ writer.WriteAttributeString (prefix, name, nspc);
+ break;
+ case XmlWriteMode.DiffGram:
+ writer.WriteAttributeString (prefix, name, nspc,stringValue);
+ break;
+ default:
+ writer.WriteAttributeString (name, stringValue);
+ break;
+ };
+ }
+
+ internal void WriteIndividualTableContent (XmlWriter writer, DataTable table, XmlWriteMode mode)
+ {
+ ((XmlTextWriter)writer).Formatting = Formatting.Indented;
+
+ if (mode == XmlWriteMode.DiffGram) {
+ SetTableRowsID (table);
+ WriteDiffGramElement (writer);
+ }
+
+ WriteStartElement (writer, mode, Namespace, Prefix, XmlConvert.EncodeName (DataSetName));
+
+ WriteTable (writer, table, mode, DataRowVersion.Default);
+
+ if (mode == XmlWriteMode.DiffGram) {
+ writer.WriteEndElement (); //DataSet name
+ if (HasChanges (DataRowState.Modified | DataRowState.Deleted)) {
+
+ DataSet beforeDS = GetChanges (DataRowState.Modified | DataRowState.Deleted);
+ WriteStartElement (writer, XmlWriteMode.DiffGram, XmlConstants.DiffgrNamespace, XmlConstants.DiffgrPrefix, "before");
+ WriteTable (writer, beforeDS.Tables [table.TableName], mode, DataRowVersion.Original);
+ writer.WriteEndElement ();
+ }
+ }
+ writer.WriteEndElement (); // DataSet name or diffgr:diffgram
+ }
+
+ XmlSchema IXmlSerializable.GetSchema ()
+ {
+ return BuildSchema ();
+ }
+
+ XmlSchema BuildSchema ()
+ {
+ return BuildSchema (Tables, Relations);
+ }
+
+ internal XmlSchema BuildSchema (DataTableCollection tables, DataRelationCollection relations)
+ {
+ string constraintPrefix = "";
+ XmlSchema schema = new XmlSchema ();
+
+ schema.Namespaces.Add("xs", XmlSchema.Namespace);
+ schema.Namespaces.Add(XmlConstants.MsdataPrefix, XmlConstants.MsdataNamespace);
+
+ if (Namespace != "" && Namespace != null) {
+ schema.AttributeFormDefault = XmlSchemaForm.Qualified;
+ schema.ElementFormDefault = XmlSchemaForm.Qualified;
+ schema.TargetNamespace = Namespace;
+ schema.Namespaces.Add(XmlConstants.TnsPrefix, Namespace);
+ constraintPrefix = XmlConstants.TnsPrefix + ":";
+ }
+
+ // set the schema id
+ schema.Id = DataSetName;
+ XmlDocument doc = new XmlDocument ();
+ XmlAttribute xmlnsAttr = doc.CreateAttribute("xmlns");
+ xmlnsAttr.Value = Namespace;
+
+ schema.UnhandledAttributes = new XmlAttribute[] {xmlnsAttr};
+
+ XmlSchemaElement elem = new XmlSchemaElement ();
+ elem.Name = XmlConvert.EncodeName (DataSetName);
+
+ XmlAttribute[] atts = new XmlAttribute [2];
+ atts[0] = doc.CreateAttribute (XmlConstants.MsdataPrefix, XmlConstants.IsDataSet, XmlConstants.MsdataNamespace);
+ atts[0].Value = "true";
+
+ atts[1] = doc.CreateAttribute (XmlConstants.MsdataPrefix, XmlConstants.Locale, XmlConstants.MsdataNamespace);
+ atts[1].Value = locale.Name;
+
+ elem.UnhandledAttributes = atts;
+
+ schema.Items.Add (elem);
+
+ XmlSchemaComplexType complex = new XmlSchemaComplexType ();
+ elem.SchemaType = complex;
+
+ XmlSchemaChoice choice = new XmlSchemaChoice ();
+ complex.Particle = choice;
+ choice.MaxOccursString = XmlConstants.Unbounded;
+
+ //Write out schema for each table in order
+ foreach (DataTable table in tables) {
+ bool isTopLevel = true;
+ foreach (DataRelation rel in table.ParentRelations) {
+ if (rel.Nested) {
+ isTopLevel = false;
+ break;
+ }
+ }
+
+ if (isTopLevel){
+ choice.Items.Add (GetTableSchema (doc, table));
+ }
+ }
+
+ AddConstraintsToSchema (elem, constraintPrefix, tables, relations);
+ return schema;
+ }
+
+ // Add all constraints in all tables to the schema.
+ private void AddConstraintsToSchema (XmlSchemaElement elem, string constraintPrefix, DataTableCollection tables, DataRelationCollection relations)
+ {
+ // first add all unique constraints.
+ Hashtable uniqueNames = AddUniqueConstraints (elem, constraintPrefix, tables);
+ // Add all foriegn key constraints.
+ AddForeignKeys (uniqueNames, elem, constraintPrefix, relations);
+ }
+
+ // Add unique constaraints to the schema.
+ // return hashtable with the names of all XmlSchemaUnique elements we created.
+ private Hashtable AddUniqueConstraints (XmlSchemaElement elem, string constraintPrefix, DataTableCollection tables)
+ {
+ XmlDocument doc = new XmlDocument();
+ Hashtable uniqueNames = new Hashtable();
+ foreach (DataTable table in tables) {
+
+ foreach (Constraint constaint in table.Constraints) {
+
+ if (constaint is UniqueConstraint) {
+ ArrayList attrs = new ArrayList ();
+ XmlAttribute attrib;
+ UniqueConstraint uqConst = (UniqueConstraint)constaint;
+ XmlSchemaUnique uniq = new XmlSchemaUnique ();
+
+ // if column of the constraint is hidden do not write the constraint.
+ bool isHidden = false;
+ foreach (DataColumn column in uqConst.Columns) {
+ if (column.ColumnMapping == MappingType.Hidden) {
+ isHidden = true;
+ break;
+ }
+ }
+
+ if (isHidden)
+ continue;
+
+ // if constaraint name do not exist in the hashtable we can use it.
+ if (!uniqueNames.ContainsKey (uqConst.ConstraintName)) {
+ uniq.Name = uqConst.ConstraintName;
+ }
+ // generate new constraint name for the XmlSchemaUnique element.
+ else {
+ uniq.Name = uqConst.Table.TableName + "_" + uqConst.ConstraintName;
+ attrib = doc.CreateAttribute (XmlConstants.MsdataPrefix, XmlConstants.ConstraintName, XmlConstants.MsdataNamespace);
+ attrib.Value = uqConst.ConstraintName;
+ attrs.Add (attrib);
+ }
+ if (uqConst.IsPrimaryKey) {
+ attrib = doc.CreateAttribute (XmlConstants.MsdataPrefix, XmlConstants.PrimaryKey, XmlConstants.MsdataNamespace);
+ attrib.Value = "true";
+ attrs.Add (attrib);
+ }
+
+ uniq.UnhandledAttributes = (XmlAttribute[])attrs.ToArray (typeof (XmlAttribute));
+
+ uniq.Selector = new XmlSchemaXPath();
+ uniq.Selector.XPath = ".//"+constraintPrefix + uqConst.Table.TableName;
+ XmlSchemaXPath field;
+ foreach (DataColumn column in uqConst.Columns) {
+ field = new XmlSchemaXPath();
+ field.XPath = constraintPrefix+column.ColumnName;
+ uniq.Fields.Add(field);
+ }
+
+ elem.Constraints.Add (uniq);
+ uniqueNames.Add (uniq.Name, null);
+ }
+ }
+ }
+ return uniqueNames;
+ }
+
+ // Add the foriegn keys to the schema.
+ private void AddForeignKeys (Hashtable uniqueNames, XmlSchemaElement elem, string constraintPrefix, DataRelationCollection relations)
+ {
+ if (relations == null) return;
+
+ XmlDocument doc = new XmlDocument();
+ foreach (DataRelation rel in relations) {
+
+ if (rel.ParentKeyConstraint == null || rel.ChildKeyConstraint == null)
+ continue;
+
+ ArrayList attrs = new ArrayList ();
+ XmlAttribute attrib;
+ XmlSchemaKeyref keyRef = new XmlSchemaKeyref();
+ keyRef.Name = rel.RelationName;
+ ForeignKeyConstraint fkConst = rel.ChildKeyConstraint;
+ UniqueConstraint uqConst = rel.ParentKeyConstraint;
+
+ string concatName = rel.ParentTable.TableName + "_" + uqConst.ConstraintName;
+ // first try to find the concatenated name. If we didn't find it - use constraint name.
+ if (uniqueNames.ContainsKey (concatName)) {
+ keyRef.Refer = new XmlQualifiedName(concatName);
+ }
+ else {
+ keyRef.Refer = new XmlQualifiedName(uqConst.ConstraintName);
+ }
+
+ if (rel.Nested) {
+ attrib = doc.CreateAttribute (XmlConstants.MsdataPrefix, XmlConstants.IsNested, XmlConstants.MsdataNamespace);
+ attrib.Value = "true";
+ attrs.Add (attrib);
+ }
+
+ keyRef.Selector = new XmlSchemaXPath();
+ keyRef.Selector.XPath = ".//" + constraintPrefix + rel.ChildTable.TableName;
+ XmlSchemaXPath field;
+ foreach (DataColumn column in rel.ChildColumns) {
+ field = new XmlSchemaXPath();
+ field.XPath = constraintPrefix+column.ColumnName;
+ keyRef.Fields.Add(field);
+ }
+ keyRef.UnhandledAttributes = (XmlAttribute[])attrs.ToArray (typeof (XmlAttribute));
+ elem.Constraints.Add (keyRef);
+ }
+ }
+
+ private XmlSchemaElement GetTableSchema (XmlDocument doc, DataTable table)
+ {
+ ArrayList elements;
+ ArrayList atts;
+ DataColumn simple;
+
+ SplitColumns (table, out atts, out elements, out simple);
+
+ XmlSchemaElement elem = new XmlSchemaElement ();
+ elem.Name = table.TableName;
+
+ XmlSchemaComplexType complex = new XmlSchemaComplexType ();
+ elem.SchemaType = complex;
+
+ //TODO - what about the simple content?
+ if (simple != null) {
+ // add simpleContent
+ XmlSchemaSimpleContent simpleContent = new XmlSchemaSimpleContent();
+ complex.ContentModel = simpleContent;
+
+ // add column name attribute
+ XmlAttribute[] xlmAttrs = new XmlAttribute [2];
+ xlmAttrs[0] = doc.CreateAttribute (XmlConstants.MsdataPrefix, XmlConstants.ColumnName, XmlConstants.MsdataNamespace);
+ xlmAttrs[0].Value = simple.ColumnName;
+
+ // add ordinal attribute
+ xlmAttrs[1] = doc.CreateAttribute (XmlConstants.MsdataPrefix, XmlConstants.Ordinal, XmlConstants.MsdataNamespace);
+ xlmAttrs[1].Value = simple.Ordinal.ToString();
+ simpleContent.UnhandledAttributes = xlmAttrs;
+
+
+ // add extension
+ XmlSchemaSimpleContentExtension extension = new XmlSchemaSimpleContentExtension();
+ simpleContent.Content = extension;
+ extension.BaseTypeName = MapType (simple.DataType);
+
+ }
+ else {
+ //A sequence of element types or a simple content node
+ //<xs:sequence>
+ XmlSchemaSequence seq = new XmlSchemaSequence ();
+ complex.Particle = seq;
+
+ foreach (DataColumn col in elements) {
+
+ // Add element for the column.
+ XmlSchemaElement colElem = new XmlSchemaElement ();
+ ArrayList xattrs = new ArrayList();
+ XmlAttribute xattr;
+ colElem.Name = col.ColumnName;
+
+ if (col.ColumnName != col.Caption && col.Caption != String.Empty) {
+ xattr = doc.CreateAttribute (XmlConstants.MsdataPrefix, XmlConstants.Caption, XmlConstants.MsdataNamespace);
+ xattr.Value = col.Caption;
+ xattrs.Add (xattr);
+ }
+
+ if (col.AutoIncrement == true) {
+ xattr = doc.CreateAttribute (XmlConstants.MsdataPrefix, XmlConstants.AutoIncrement, XmlConstants.MsdataNamespace);
+ xattr.Value = "true";
+ xattrs.Add (xattr);
+ }
+
+ if (col.AutoIncrementSeed != 0) {
+ xattr = doc.CreateAttribute (XmlConstants.MsdataPrefix, XmlConstants.AutoIncrementSeed, XmlConstants.MsdataNamespace);
+ xattr.Value = col.AutoIncrementSeed.ToString();
+ xattrs.Add (xattr);
+ }
+
+ if (col.DefaultValue.ToString () != String.Empty)
+ colElem.DefaultValue = col.DefaultValue.ToString ();
+
+ if (col.MaxLength < 0)
+ colElem.SchemaTypeName = MapType (col.DataType);
+
+ if (colElem.SchemaTypeName == XmlConstants.QnString && col.DataType != typeof (string)
+ && col.DataType != typeof (char)) {
+ xattr = doc.CreateAttribute (XmlConstants.MsdataPrefix, XmlConstants.DataType, XmlConstants.MsdataNamespace);
+ xattr.Value = col.DataType.ToString();
+ xattrs.Add (xattr);
+ }
+
+ if (col.AllowDBNull) {
+ colElem.MinOccurs = 0;
+ }
+
+ //writer.WriteAttributeString (XmlConstants.MsdataPrefix,
+ // XmlConstants.Ordinal,
+ // XmlConstants.MsdataNamespace,
+ // col.Ordinal.ToString ());
+
+ // Write SimpleType if column have MaxLength
+ if (col.MaxLength > -1) {
+ colElem.SchemaType = GetTableSimpleType (doc, col);
+ }
+
+ colElem.UnhandledAttributes = (XmlAttribute[])xattrs.ToArray(typeof (XmlAttribute));
+ seq.Items.Add (colElem);
+ }
+
+ foreach (DataRelation rel in table.ChildRelations) {
+ if (rel.Nested) {
+ seq.Items.Add(GetTableSchema (doc, rel.ChildTable));
+ }
+ }
+ }
+
+ //Then a list of attributes
+ foreach (DataColumn col in atts) {
+ //<xs:attribute name=col.ColumnName form="unqualified" type=MappedType/>
+ XmlSchemaAttribute att = new XmlSchemaAttribute ();
+ att.Name = col.ColumnName;
+ att.Form = XmlSchemaForm.Unqualified;
+ att.SchemaTypeName = MapType (col.DataType);
+ complex.Attributes.Add (att);
+ }
+
+ return elem;
+ }
+
+ private XmlSchemaSimpleType GetTableSimpleType (XmlDocument doc, DataColumn col)
+ {
+ // SimpleType
+ XmlSchemaSimpleType simple = new XmlSchemaSimpleType ();
+
+ // Restriction
+ XmlSchemaSimpleTypeRestriction restriction = new XmlSchemaSimpleTypeRestriction ();
+ restriction.BaseTypeName = MapType (col.DataType);
+
+ // MaxValue
+ XmlSchemaMaxLengthFacet max = new XmlSchemaMaxLengthFacet ();
+ max.Value = XmlConvert.ToString (col.MaxLength);
+ restriction.Facets.Add (max);
+
+ simple.Content = restriction;
+ return simple;
+ }
+
+ private void DoWriteXmlSchema (XmlWriter writer)
+ {
+ BuildSchema ().Write (writer);
+ }
+
+ ///<summary>
+ /// Helper function to split columns into attributes elements and simple
+ /// content
+ /// </summary>
+ private void SplitColumns (DataTable table,
+ out ArrayList atts,
+ out ArrayList elements,
+ out DataColumn simple)
+ {
+ //The columns can be attributes, hidden, elements, or simple content
+ //There can be 0-1 simple content cols or 0-* elements
+ atts = new System.Collections.ArrayList ();
+ elements = new System.Collections.ArrayList ();
+ simple = null;
+
+ //Sort out the columns
+ foreach (DataColumn col in table.Columns) {
+ switch (col.ColumnMapping) {
+ case MappingType.Attribute:
+ atts.Add (col);
+ break;
+ case MappingType.Element:
+ elements.Add (col);
+ break;
+ case MappingType.SimpleContent:
+ if (simple != null) {
+ throw new System.InvalidOperationException ("There may only be one simple content element");
+ }
+ simple = col;
+ break;
+ default:
+ //ignore Hidden elements
+ break;
+ }
+ }
+ }
+
+ private void WriteDiffGramElement(XmlWriter writer)
+ {
+ WriteStartElement (writer, XmlWriteMode.DiffGram, XmlConstants.DiffgrNamespace, XmlConstants.DiffgrPrefix, "diffgram");
+ WriteAttributeString(writer, XmlWriteMode.DiffGram, null, "xmlns", XmlConstants.MsdataPrefix, XmlConstants.MsdataNamespace);
+ }
+
+ private void SetRowsID()
+ {
+ foreach (DataTable Table in Tables)
+ SetTableRowsID (Table);
+ }
+
+ private void SetTableRowsID (DataTable Table)
+ {
+ int dataRowID = 0;
+ foreach (DataRow Row in Table.Rows) {
+ Row.XmlRowID = dataRowID;
+ dataRowID++;
+ }
+ }
+
+
+ private XmlQualifiedName MapType (Type type)
+ {
+ switch (Type.GetTypeCode (type)) {
+ case TypeCode.String: return XmlConstants.QnString;
+ case TypeCode.Int16: return XmlConstants.QnShort;
+ case TypeCode.Int32: return XmlConstants.QnInt;
+ case TypeCode.Int64: return XmlConstants.QnLong;
+ case TypeCode.Boolean: return XmlConstants.QnBoolean;
+ case TypeCode.Byte: return XmlConstants.QnUnsignedByte;
+ //case TypeCode.Char: return XmlConstants.QnChar;
+ case TypeCode.DateTime: return XmlConstants.QnDateTime;
+ case TypeCode.Decimal: return XmlConstants.QnDecimal;
+ case TypeCode.Double: return XmlConstants.QnDouble;
+ case TypeCode.SByte: return XmlConstants.QnSbyte;
+ case TypeCode.Single: return XmlConstants.QnFloat;
+ case TypeCode.UInt16: return XmlConstants.QnUsignedShort;
+ case TypeCode.UInt32: return XmlConstants.QnUnsignedInt;
+ case TypeCode.UInt64: return XmlConstants.QnUnsignedLong;
+ }
+
+ if (typeof (TimeSpan) == type)
+ return XmlConstants.QnDuration;
+ else if (typeof (System.Uri) == type)
+ return XmlConstants.QnUri;
+ else if (typeof (byte[]) == type)
+ return XmlConstants.QnBase64Binary;
+ else if (typeof (XmlQualifiedName) == type)
+ return XmlConstants.QnXmlQualifiedName;
+ else
+ return XmlConstants.QnString;
+ }
+ #endregion //Private Xml Serialisation
}
}