using System;
using System.Collections;
using System.Globalization;
+using System.Xml;
namespace System.Data {
/// <summary>
private string _nullConstraintMessage;
private bool editing = false;
private bool _hasParentCollection;
+ private bool _inChangingEvent;
+ private int _rowId;
+ internal bool _inExpressionEvaluation = false;
+
+ private XmlDataDocument.XmlDataElement mappedElement;
#endregion
protected internal DataRow (DataRowBuilder builder)
{
_table = builder.Table;
+ // Get the row id from the builder.
+ _rowId = builder._rowId;
original = null;
proposed = new object[_table.Columns.Count];
+ // Initialise the data coloumns of the row with the dafault values, if any
for (int c = 0; c < _table.Columns.Count; c++)
{
- proposed[c] = DBNull.Value;
+ if(_table.Columns [c].DefaultValue == null)
+ proposed[c] = DBNull.Value;
+ else
+ proposed [c] = _table.Columns[c].DefaultValue;
}
columnErrors = new string[_table.Columns.Count];
//on first creating a DataRow it is always detached.
rowState = DataRowState.Detached;
- foreach (DataColumn Col in _table.Columns) {
-
- if (Col.AutoIncrement) {
- this [Col] = Col.AutoIncrementValue();
- }
+ ArrayList aiColumns = _table.Columns.AutoIncrmentColumns;
+ foreach (string col in aiColumns) {
+ DataColumn dc = _table.Columns[col];
+ this [dc] = dc.AutoIncrementValue();
}
_table.Columns.CollectionChanged += new System.ComponentModel.CollectionChangeEventHandler(CollectionChanged);
+
+ // create mapped XmlDataElement
+ DataSet ds = _table.DataSet;
+ if (ds != null && ds._xmlDataDocument != null)
+ mappedElement = new XmlDataDocument.XmlDataElement (this, _table.Prefix, _table.TableName, _table.Namespace, ds._xmlDataDocument);
}
/// Gets a value indicating whether there are errors in a row.
/// </summary>
public bool HasErrors {
- [MonoTODO]
get {
if (RowError != string.Empty)
return true;
bool orginalEditing = editing;
if (!orginalEditing) BeginEdit ();
- object v = SetColumnValue (value, columnIndex);
+ object v = SetColumnValue (value, column, columnIndex);
proposed[columnIndex] = v;
_table.ChangedDataColumn (this, column, v);
if (!orginalEditing) EndEdit ();
/// </summary>
public object this[DataColumn column, DataRowVersion version] {
get {
- int columnIndex = _table.Columns.IndexOf (column);
- if (columnIndex == -1)
+ if (column.Table != Table)
throw new ArgumentException ("The column does not belong to this table.");
+ int columnIndex = column.Ordinal;
return this[columnIndex, version];
}
}
if (columnIndex < 0 || columnIndex > _table.Columns.Count)
throw new IndexOutOfRangeException ();
// Accessing deleted rows
- if (rowState == DataRowState.Deleted && version != DataRowVersion.Original)
+ if (!_inExpressionEvaluation && rowState == DataRowState.Deleted && version != DataRowVersion.Original)
throw new DeletedRowInaccessibleException ("Deleted row information cannot be accessed through the row.");
- // Non-existent version
- if (rowState == DataRowState.Detached && version == DataRowVersion.Current || !HasVersion (version))
- throw new VersionNotFoundException (Locale.GetText ("There is no " + version.ToString () + " data to access."));
- switch (version) {
- case DataRowVersion.Default:
- if (editing || rowState == DataRowState.Detached)
- return proposed[columnIndex];
- return current[columnIndex];
- case DataRowVersion.Proposed:
- return proposed[columnIndex];
- case DataRowVersion.Current:
- return current[columnIndex];
- case DataRowVersion.Original:
- return original[columnIndex];
- default:
- throw new ArgumentException ();
+
+ DataColumn col = _table.Columns[columnIndex];
+ if (col.Expression != String.Empty) {
+ object o = col.CompiledExpression.Eval (this);
+ return Convert.ChangeType (o, col.DataType);
+ }
+
+ if (HasVersion(version))
+ {
+ switch (version)
+ {
+ case DataRowVersion.Default:
+ if (editing || rowState == DataRowState.Detached)
+ return proposed[columnIndex];
+ return current[columnIndex];
+ case DataRowVersion.Proposed:
+ return proposed[columnIndex];
+ case DataRowVersion.Current:
+ return current[columnIndex];
+ case DataRowVersion.Original:
+ return original[columnIndex];
+ default:
+ throw new ArgumentException ();
+ }
}
+ if (rowState == DataRowState.Detached && version == DataRowVersion.Default && proposed == null)
+ throw new RowNotInTableException("This row has been removed from a table and does not have any data. BeginEdit() will allow creation of new data in this row.");
+
+ throw new VersionNotFoundException (Locale.GetText ("There is no " + version.ToString () + " data to access."));
}
}
+
+ internal void SetOriginalValue (string columnName, object val)
+ {
+ int columnIndex = _table.Columns.IndexOf (columnName);
+ DataColumn column = _table.Columns[columnIndex];
+ _table.ChangingDataColumn (this, column, val);
+
+ if (original == null) original = new object [_table.Columns.Count];
+ val = SetColumnValue (val, column, columnIndex);
+ original[columnIndex] = val;
+ rowState = DataRowState.Modified;
+ }
/// <summary>
/// Gets or sets all of the values for this row through an array.
/// </summary>
- [MonoTODO]
public object[] ItemArray {
get {
- // Accessing deleted rows\r
- if (rowState == DataRowState.Deleted)\r
- throw new DeletedRowInaccessibleException ("Deleted row information cannot be accessed through the row.");\r
+ // row not in table
+ if (rowState == DataRowState.Detached)
+ throw new RowNotInTableException("This row has been removed from a table and does not have any data. BeginEdit() will allow creation of new data in this row.");
+ // Accessing deleted rows
+ if (rowState == DataRowState.Deleted)
+ throw new DeletedRowInaccessibleException ("Deleted row information cannot be accessed through the row.");
return current;
}
else
v = null;
- newItems[i] = SetColumnValue (v, i);
+ newItems[i] = SetColumnValue (v, _table.Columns[i], i);
}
bool orginalEditing = editing;
}
}
- private object SetColumnValue (object v, int index) \r
- { \r
- object newval = null;\r
- DataColumn col = _table.Columns[index];\r
- \r
- if (_hasParentCollection && col.ReadOnly && v != this[index])\r
- throw new ReadOnlyException ();\r
-\r
- if (v == null)\r
- {\r
- if(col.DefaultValue != DBNull.Value) \r
- {\r
- newval = col.DefaultValue;\r
- }\r
- else if(col.AutoIncrement == true) \r
- {\r
- newval = this [index];\r
- }\r
- else \r
- {\r
- if (!col.AllowDBNull)\r
- {\r
- //Constraint violations during data load is raise in DataTable EndLoad\r
- this._nullConstraintViolation = true;\r
- _nullConstraintMessage = "Column '" + col.ColumnName + "' does not allow nulls.";\r
- }\r
-\r
- newval = DBNull.Value;\r
- }\r
- } \r
- else if (v == DBNull.Value) \r
- {\r
- \r
- if (!col.AllowDBNull)\r
- {\r
- //Constraint violations during data load is raise in DataTable EndLoad\r
- this._nullConstraintViolation = true;\r
- _nullConstraintMessage = "Column '" + col.ColumnName + "' does not allow nulls.";\r
- }\r
- \r
- newval = DBNull.Value;\r
- }\r
- else \r
- { \r
- Type vType = v.GetType(); // data type of value\r
- Type cType = col.DataType; // column data type\r
- if (cType != vType) \r
- {\r
- TypeCode typeCode = Type.GetTypeCode(cType);\r
- switch(typeCode) {\r
- case TypeCode.Boolean :\r
- v = Convert.ToBoolean (v);\r
- break;\r
- case TypeCode.Byte :\r
- v = Convert.ToByte (v);\r
- break;\r
- case TypeCode.Char :\r
- v = Convert.ToChar (v);\r
- break;\r
- case TypeCode.DateTime :\r
- v = Convert.ToDateTime (v);\r
- break;\r
- case TypeCode.Decimal :\r
- v = Convert.ToDecimal (v);\r
- break;\r
- case TypeCode.Double :\r
- v = Convert.ToDouble (v);\r
- break;\r
- case TypeCode.Int16 :\r
- v = Convert.ToInt16 (v);\r
- break;\r
- case TypeCode.Int32 :\r
- v = Convert.ToInt32 (v);\r
- break;\r
- case TypeCode.Int64 :\r
- v = Convert.ToInt64 (v);\r
- break;\r
- case TypeCode.SByte :\r
- v = Convert.ToSByte (v);\r
- break;\r
- case TypeCode.Single :\r
- v = Convert.ToSingle (v);\r
- break;\r
- case TypeCode.String :\r
- v = Convert.ToString (v);\r
- break;\r
- case TypeCode.UInt16 :\r
- v = Convert.ToUInt16 (v);\r
- break;\r
- case TypeCode.UInt32 :\r
- v = Convert.ToUInt32 (v);\r
- break;\r
- case TypeCode.UInt64 :\r
- v = Convert.ToUInt64 (v);\r
- break;\r
- default :\r
- \r
- switch(cType.ToString()) {\r
- case "System.TimeSpan" :\r
- v = (System.TimeSpan) v;\r
- break;\r
- case "System.Type" :\r
- v = (System.Type) v;\r
- break;\r
- case "System.Object" :\r
- //v = (System.Object) v;\r
- break;\r
- default:\r
- if (!cType.IsArray)\r
- throw new InvalidCastException("Type not supported.");\r
- break;\r
- }\r
- break;\r
- }\r
- vType = v.GetType();\r
- }\r
- newval = v;\r
- if(col.AutoIncrement == true) {\r
- long inc = Convert.ToInt64(v);\r
- col.UpdateAutoIncrementValue (inc);\r
- }\r
- }\r
- col.DataHasBeenSet = true;\r
- return newval;\r
- }\r
+ private object SetColumnValue (object v, DataColumn col, int index)
+ {
+ object newval = null;
+
+ if (_hasParentCollection && col.ReadOnly && v != this[index])
+ throw new ReadOnlyException ();
+ if (v == null)
+ {
+ if (col.DataType.ToString().Equals("System.Guid"))
+ throw new ArgumentException("Cannot set column to be null, Please use DBNull instead");
+
+ if(col.DefaultValue != DBNull.Value)
+ {
+ newval = col.DefaultValue;
+ }
+ else if(col.AutoIncrement == true && CanAccess(index,DataRowVersion.Default))
+ {
+ // AutoIncrement column is already filled,
+ // so it just need to return existing value.
+ newval = this [index];
+ }
+ else
+ {
+ if (!col.AllowDBNull)
+ {
+ //Constraint violations during data load is raise in DataTable EndLoad
+ this._nullConstraintViolation = true;
+ if (this.Table._duringDataLoad) {
+ this.Table._nullConstraintViolationDuringDataLoad = true;
+ }
+ _nullConstraintMessage = "Column '" + col.ColumnName + "' does not allow nulls.";
+ }
+
+ newval = DBNull.Value;
+ }
+ }
+ else if (v == DBNull.Value)
+ {
+
+ if (!col.AllowDBNull)
+ {
+ //Constraint violations during data load is raise in DataTable EndLoad
+ this._nullConstraintViolation = true;
+ if (this.Table._duringDataLoad) {
+ this.Table._nullConstraintViolationDuringDataLoad = true;
+ }
+ _nullConstraintMessage = "Column '" + col.ColumnName + "' does not allow nulls.";
+ }
+
+ newval = DBNull.Value;
+ }
+ else
+ {
+ Type vType = v.GetType(); // data type of value
+ Type cType = col.DataType; // column data type
+ if (cType != vType)
+ {
+ TypeCode typeCode = Type.GetTypeCode(cType);
+ switch(typeCode) {
+ case TypeCode.Boolean :
+ v = Convert.ToBoolean (v);
+ break;
+ case TypeCode.Byte :
+ v = Convert.ToByte (v);
+ break;
+ case TypeCode.Char :
+ v = Convert.ToChar (v);
+ break;
+ case TypeCode.DateTime :
+ v = Convert.ToDateTime (v);
+ break;
+ case TypeCode.Decimal :
+ v = Convert.ToDecimal (v);
+ break;
+ case TypeCode.Double :
+ v = Convert.ToDouble (v);
+ break;
+ case TypeCode.Int16 :
+ v = Convert.ToInt16 (v);
+ break;
+ case TypeCode.Int32 :
+ v = Convert.ToInt32 (v);
+ break;
+ case TypeCode.Int64 :
+ v = Convert.ToInt64 (v);
+ break;
+ case TypeCode.SByte :
+ v = Convert.ToSByte (v);
+ break;
+ case TypeCode.Single :
+ v = Convert.ToSingle (v);
+ break;
+ case TypeCode.String :
+ v = Convert.ToString (v);
+ break;
+ case TypeCode.UInt16 :
+ v = Convert.ToUInt16 (v);
+ break;
+ case TypeCode.UInt32 :
+ v = Convert.ToUInt32 (v);
+ break;
+ case TypeCode.UInt64 :
+ v = Convert.ToUInt64 (v);
+ break;
+ default :
+
+ switch(cType.ToString()) {
+ case "System.TimeSpan" :
+ v = (System.TimeSpan) v;
+ break;
+ case "System.Type" :
+ v = (System.Type) v;
+ break;
+ case "System.Object" :
+ //v = (System.Object) v;
+ break;
+ default:
+ if (!cType.IsArray)
+ throw new InvalidCastException("Type not supported.");
+ break;
+ }
+ break;
+ }
+ vType = v.GetType();
+ }
+
+ // The MaxLength property is ignored for non-text columns
+ if ((Type.GetTypeCode(vType) == TypeCode.String) && (col.MaxLength != -1) &&
+ (this.Table.Columns[index].MaxLength < ((string)v).Length)) {
+ throw new ArgumentException("Cannot set column '" + col.ColumnName + "' to '" + v + "'. The value violates the MaxLength limit of this column.");
+ }
+ newval = v;
+ if(col.AutoIncrement == true) {
+ long inc = Convert.ToInt64(v);
+ col.UpdateAutoIncrementValue (inc);
+ }
+ }
+ col.DataHasBeenSet = true;
+ return newval;
+ }
/// <summary>
/// Gets or sets the custom error description for a row.
//from a Datatable so I added this method. Delete if there is a better way.
internal void DetachRow() {
proposed = null;
+ _rowId = -1;
_hasParentCollection = false;
rowState = DataRowState.Detached;
}
get { return _table; }
}
+ internal XmlDataDocument.XmlDataElement DataElement {
+ get { return mappedElement; }
+ set { mappedElement = value; }
+ }
+
/// <summary>
/// Gets and sets index of row. This is used from
/// XmlDataDocument.
get { return xmlRowID; }
set { xmlRowID = value; }
}
+
+ /// <summary>
+ /// Gets and sets index of row.
+ // </summary>
+ internal int RowID {
+ get { return _rowId; }
+ set { _rowId = value; }
+ }
#endregion
break;
case DataRowState.Deleted:
_table.Rows.RemoveInternal (this);
+ DetachRow();
break;
case DataRowState.Detached:
throw new RowNotInTableException("Cannot perform this operation on a row not in the table.");
/// <summary>
/// Begins an edit operation on a DataRow object.
/// </summary>
- [MonoTODO]
public void BeginEdit ()
{
+
+ if (_inChangingEvent)
+ throw new InRowChangingEventException("Cannot call BeginEdit inside an OnRowChanging event.");
if (rowState == DataRowState.Deleted)
throw new DeletedRowInaccessibleException ();
if (!HasVersion (DataRowVersion.Proposed)) {
proposed = new object[_table.Columns.Count];
Array.Copy (current, proposed, current.Length);
}
- //TODO: Suspend validation
+ // setting editing to true stops validations on the row
editing = true;
}
/// <summary>
/// Cancels the current edit on the row.
/// </summary>
- [MonoTODO]
public void CancelEdit ()
{
+ if (_inChangingEvent)
+ throw new InRowChangingEventException("Cannot call CancelEdit inside an OnRowChanging event.");
editing = false;
- //TODO: Events
if (HasVersion (DataRowVersion.Proposed)) {
proposed = null;
if (rowState == DataRowState.Modified)
/// <summary>
/// Deletes the DataRow.
/// </summary>
- [MonoTODO]
public void Delete ()
{
_table.DeletingDataRow(this, DataRowAction.Delete);
switch (rowState) {
case DataRowState.Added:
+ // check what to do with child rows
+ CheckChildRows(DataRowAction.Delete);
+ _table.DeleteRowFromIndexes (this);
Table.Rows.RemoveInternal (this);
+
+ // if row was in Added state we move it to Detached.
+ DetachRow();
break;
case DataRowState.Deleted:
- throw new DeletedRowInaccessibleException ();
+ break;
default:
// check what to do with child rows
CheckChildRows(DataRowAction.Delete);
+ _table.DeleteRowFromIndexes (this);
rowState = DataRowState.Deleted;
break;
}
private void CheckChildRows(DataRowAction action)
{
- // in this method we find the row that this row is in a reltion with them.
+ // in this method we find the row that this row is in a relation with them.
// in shortly we find all child rows of this row.
// then we function according to the DeleteRule of the foriegnkey.
{
foreach (DataTable table in _table.DataSet.Tables)
{
- // loop on all constraints of the table.
- ConstraintCollection constraintsCollection = table.Constraints;
- for (int i = 0; i < constraintsCollection.Count; i++)
+ // loop on all ForeignKeyConstrain of the table.
+ foreach (ForeignKeyConstraint fk in table.Constraints.ForeignKeyConstraints)
{
- ForeignKeyConstraint fk = null;
- if (constraintsCollection[i] is ForeignKeyConstraint)
+ if (fk.RelatedTable == _table)
{
- fk = (ForeignKeyConstraint)constraintsCollection[i];
- if (fk.RelatedTable == _table)
- {
- //we create a dummy relation because we do not want to duplicate code of GetChild().
- // we use the dummy relation to find child rows.
- DataRelation rel = new DataRelation("dummy", fk.RelatedColumns, fk.Columns, false);
- Rule rule;
- if (action == DataRowAction.Delete)
- rule = fk.DeleteRule;
- else
- rule = fk.UpdateRule;
- CheckChildRows(rel, action, rule);
- }
+ Rule rule;
+ if (action == DataRowAction.Delete)
+ rule = fk.DeleteRule;
+ else
+ rule = fk.UpdateRule;
+ CheckChildRows(fk, action, rule);
}
}
}
}
}
- private void CheckChildRows(DataRelation rel, DataRowAction action, Rule rule)
+ private void CheckChildRows(ForeignKeyConstraint fkc, DataRowAction action, Rule rule)
{
- DataRow[] childRows = GetChildRows(rel);
+ DataRow[] childRows = GetChildRows(fkc, DataRowVersion.Default);
switch (rule)
{
case Rule.Cascade: // delete or change all relted rows.
{
// change only the values in the key columns
// set the childcolumn value to the new parent row value
- for (int k = 0; k < rel.ChildColumns.Length; k++)
- childRows[j][rel.ChildColumns[k]] = this[rel.ParentColumns[k], DataRowVersion.Proposed];
+ for (int k = 0; k < fkc.Columns.Length; k++)
+ childRows[j][fkc.Columns[k]] = this[fkc.RelatedColumns[k], DataRowVersion.Proposed];
}
}
}
{
if (childRows[j].RowState != DataRowState.Deleted)
{
- string changeStr = "Cannot change this row because constraints are enforced on relation " + rel.RelationName +", and changing this row will strand child rows.";
- string delStr = "Cannot delete this row because constraints are enforced on relation " + rel.RelationName +", and deleting this row will strand child rows.";
+ string changeStr = "Cannot change this row because constraints are enforced on relation " + fkc.ConstraintName +", and changing this row will strand child rows.";
+ string delStr = "Cannot delete this row because constraints are enforced on relation " + fkc.ConstraintName +", and deleting this row will strand child rows.";
string message = action == DataRowAction.Delete ? delStr : changeStr;
throw new InvalidConstraintException(message);
}
if (childRows[j].RowState != DataRowState.Deleted)
{
//set only the key columns to default
- for (int k = 0; k < rel.ChildColumns.Length; k++)
- child[rel.ChildColumns[k]] = rel.ChildColumns[k].DefaultValue;
+ for (int k = 0; k < fkc.Columns.Length; k++)
+ child[fkc.Columns[k]] = fkc.Columns[k].DefaultValue;
}
}
}
if (childRows[j].RowState != DataRowState.Deleted)
{
// set only the key columns to DBNull
- for (int k = 0; k < rel.ChildColumns.Length; k++)
- child.SetNull(rel.ChildColumns[k]);
+ for (int k = 0; k < fkc.Columns.Length; k++)
+ child.SetNull(fkc.Columns[k]);
}
}
}
/// <summary>
/// Ends the edit occurring on the row.
/// </summary>
- [MonoTODO]
public void EndEdit ()
{
- if (rowState == DataRowState.Detached)\r
- {\r
- editing = false;\r
- return;\r
- }\r
-\r
- if (HasVersion (DataRowVersion.Proposed))\r
- {\r
- _table.ChangingDataRow(this, DataRowAction.Change);\r
- if (rowState == DataRowState.Unchanged)\r
- rowState = DataRowState.Modified;\r
- \r
- //Calling next method validates UniqueConstraints\r
- //and ForeignKeys.\r
- try\r
- {\r
- if ((_table.DataSet == null || _table.DataSet.EnforceConstraints) && !_table._duringDataLoad)\r
- _table.Rows.ValidateDataRowInternal(this);\r
- }\r
- catch (Exception e)\r
- {\r
- editing = false;\r
- proposed = null;\r
- throw e;\r
- }\r
- // check all child rows.\r
- CheckChildRows(DataRowAction.Change);\r
- current = proposed;\r
- proposed = null;\r
- editing = false;\r
- _table.ChangedDataRow(this, DataRowAction.Change);\r
+ if (_inChangingEvent)
+ throw new InRowChangingEventException("Cannot call EndEdit inside an OnRowChanging event.");
+ if (rowState == DataRowState.Detached)
+ {
+ editing = false;
+ return;
+ }
+
+ CheckReadOnlyStatus();
+ if (HasVersion (DataRowVersion.Proposed))
+ {
+ _inChangingEvent = true;
+ try
+ {
+ _table.ChangingDataRow(this, DataRowAction.Change);
+ }
+ finally
+ {
+ _inChangingEvent = false;
+ }
+ if (rowState == DataRowState.Unchanged)
+ rowState = DataRowState.Modified;
+
+ //Calling next method validates UniqueConstraints
+ //and ForeignKeys.
+ try
+ {
+ if ((_table.DataSet == null || _table.DataSet.EnforceConstraints) && !_table._duringDataLoad)
+ _table.Rows.ValidateDataRowInternal(this);
+ }
+ catch (Exception e)
+ {
+ editing = false;
+ proposed = null;
+ throw e;
+ }
+
+ // Now we are going to check all child rows of current row.
+ // In the case the cascade is true the child rows will look up for
+ // parent row. since lookup in index is always on current,
+ // we have to move proposed version of current row to current
+ // in the case of check child row failure we are rolling
+ // current row state back.
+ object[] backup = current;
+ current = proposed;
+ bool editing_backup = editing;
+ editing = false;
+ try {
+ // check all child rows.
+ CheckChildRows(DataRowAction.Change);
+ proposed = null;
+ }
+ catch (Exception ex) {
+ // if check child rows failed - rollback to previous state
+ // i.e. restore proposed and current versions
+ proposed = current;
+ current = backup;
+ editing = editing_backup;
+ // since we failed - propagate an exception
+ throw ex;
+ }
+ _table.ChangedDataRow(this, DataRowAction.Change);
}
}
if (relation == null)
return new DataRow[0];
- if (this.Table == null)
- throw new RowNotInTableException();
+ if (this.Table == null || RowState == DataRowState.Detached)
+ throw new RowNotInTableException("This row has been removed from a table and does not have any data. BeginEdit() will allow creation of new data in this row.");
if (relation.DataSet != this.Table.DataSet)
throw new ArgumentException();
- // TODO: Caching for better preformance
+ if (relation.ChildKeyConstraint != null)
+ return GetChildRows (relation.ChildKeyConstraint, version);
+
ArrayList rows = new ArrayList();
DataColumn[] parentColumns = relation.ParentColumns;
DataColumn[] childColumns = relation.ChildColumns;
int numColumn = parentColumns.Length;
- if (HasVersion(version))
+ if (HasVersion(version))
{
+ object[] vals = new object[parentColumns.Length];
+ for (int i = 0; i < vals.Length; i++)
+ vals[i] = this[parentColumns[i], version];
+
foreach (DataRow row in relation.ChildTable.Rows)
{
bool allColumnsMatch = false;
allColumnsMatch = true;
for (int columnCnt = 0; columnCnt < numColumn; ++columnCnt)
{
- if (!this[parentColumns[columnCnt], version].Equals(
+ if (!vals[columnCnt].Equals(
row[childColumns[columnCnt], DataRowVersion.Default]))
{
allColumnsMatch = false;
if (allColumnsMatch) rows.Add(row);
}
}
- return rows.ToArray(typeof(DataRow)) as DataRow[];
+ DataRow[] result = relation.ChildTable.NewRowArray(rows.Count);
+ rows.CopyTo(result, 0);
+ return result;
}
/// <summary>
return GetChildRows (Table.DataSet.Relations[relationName], version);
}
+ private DataRow[] GetChildRows (ForeignKeyConstraint fkc, DataRowVersion version)
+ {
+ ArrayList rows = new ArrayList();
+ DataColumn[] parentColumns = fkc.RelatedColumns;
+ DataColumn[] childColumns = fkc.Columns;
+ int numColumn = parentColumns.Length;
+ if (HasVersion(version))
+ {
+ object[] vals = new object[parentColumns.Length];
+ for (int i = 0; i < vals.Length; i++)
+ vals[i] = this[parentColumns[i], version];
+
+ Index index = fkc.Index;
+ if (index != null) {
+ // get the child rows from the index
+ Node[] childNodes = index.FindAllSimple (vals);
+ for (int i = 0; i < childNodes.Length; i++) {
+ rows.Add (childNodes[i].Row);
+ }
+ }
+ else { // if there is no index we search manualy.
+ foreach (DataRow row in fkc.Table.Rows)
+ {
+ bool allColumnsMatch = false;
+ if (row.HasVersion(DataRowVersion.Default))
+ {
+ allColumnsMatch = true;
+ for (int columnCnt = 0; columnCnt < numColumn; ++columnCnt)
+ {
+ if (!vals[columnCnt].Equals(
+ row[childColumns[columnCnt], DataRowVersion.Default]))
+ {
+ allColumnsMatch = false;
+ break;
+ }
+ }
+ }
+ if (allColumnsMatch) rows.Add(row);
+ }
+ }
+ }
+
+ DataRow[] result = fkc.Table.NewRowArray(rows.Count);
+ rows.CopyTo(result, 0);
+ return result;
+ }
+
/// <summary>
/// Gets the error description of the specified DataColumn.
/// </summary>
if (relation == null)
return new DataRow[0];
- if (this.Table == null)
- throw new RowNotInTableException();
+ if (this.Table == null || RowState == DataRowState.Detached)
+ throw new RowNotInTableException("This row has been removed from a table and does not have any data. BeginEdit() will allow creation of new data in this row.");
if (relation.DataSet != this.Table.DataSet)
throw new ArgumentException();
int numColumn = parentColumns.Length;
if (HasVersion(version))
{
- foreach (DataRow row in relation.ParentTable.Rows)
- {
- bool allColumnsMatch = false;
- if (row.HasVersion(DataRowVersion.Default))
+ object[] vals = new object[childColumns.Length];
+ for (int i = 0; i < vals.Length; i++)
+ vals[i] = this[childColumns[i], version];
+
+ Index indx = relation.ParentTable.GetIndexByColumns (parentColumns);
+ if (indx != null) { // get the child rows from the index
+ Node[] childNodes = indx.FindAllSimple (vals);
+ for (int i = 0; i < childNodes.Length; i++) {
+ rows.Add (childNodes[i].Row);
+ }
+ }
+ else { // no index so we have to search manualy.
+ foreach (DataRow row in relation.ParentTable.Rows)
{
- allColumnsMatch = true;
- for (int columnCnt = 0; columnCnt < numColumn; columnCnt++)
+ bool allColumnsMatch = false;
+ if (row.HasVersion(DataRowVersion.Default))
{
- if (!this[childColumns[columnCnt], version].Equals(
- row[parentColumns[columnCnt], DataRowVersion.Default]))
+ allColumnsMatch = true;
+ for (int columnCnt = 0; columnCnt < numColumn; columnCnt++)
{
- allColumnsMatch = false;
- break;
+ if (!this[childColumns[columnCnt], version].Equals(
+ row[parentColumns[columnCnt], DataRowVersion.Default]))
+ {
+ allColumnsMatch = false;
+ break;
+ }
}
}
+ if (allColumnsMatch) rows.Add(row);
}
- if (allColumnsMatch) rows.Add(row);
}
}
- return rows.ToArray(typeof(DataRow)) as DataRow[];
+
+ DataRow[] result = relation.ParentTable.NewRowArray(rows.Count);
+ rows.CopyTo(result, 0);
+ return result;
}
/// <summary>
switch (version)
{
case DataRowVersion.Default:
- if (rowState == DataRowState.Deleted)
+ if (rowState == DataRowState.Deleted && !_inExpressionEvaluation)
return false;
if (rowState == DataRowState.Detached)
return proposed != null;
return true;
case DataRowVersion.Proposed:
- if (rowState == DataRowState.Deleted)
+ if (rowState == DataRowState.Deleted && !_inExpressionEvaluation)
return false;
return (proposed != null);
case DataRowVersion.Current:
- if (rowState == DataRowState.Deleted || rowState == DataRowState.Detached)
+ if ((rowState == DataRowState.Deleted && !_inExpressionEvaluation) || rowState == DataRowState.Detached)
return false;
return (current != null);
case DataRowVersion.Original:
public bool IsNull (DataColumn column)
{
object o = this[column];
- return (o == null || o == DBNull.Value);
+ return (o == DBNull.Value);
}
/// <summary>
public bool IsNull (int columnIndex)
{
object o = this[columnIndex];
- return (o == null || o == DBNull.Value);
+ return (o == DBNull.Value);
}
/// <summary>
public bool IsNull (string columnName)
{
object o = this[columnName];
- return (o == null || o == DBNull.Value);
+ return (o == DBNull.Value);
}
/// <summary>
public bool IsNull (DataColumn column, DataRowVersion version)
{
object o = this[column, version];
- return (o == null || o == DBNull.Value);
+ return (o == DBNull.Value);
+ }
+
+ /// <summary>
+ /// Returns a value indicating whether all of the row columns specified contain a null value.
+ /// </summary>
+ internal bool IsNullColumns(DataColumn[] columns)
+ {
+ bool allNull = true;
+ for (int i = 0; i < columns.Length; i++)
+ {
+ if (!IsNull(columns[i]))
+ {
+ allNull = false;
+ break;
+ }
+ }
+ return allNull;
}
/// <summary>
/// </summary>
public void RejectChanges ()
{
+ if (RowState == DataRowState.Detached)
+ throw new RowNotInTableException("This row has been removed from a table and does not have any data. BeginEdit() will allow creation of new data in this row.");
// If original is null, then nothing has happened since AcceptChanges
// was last called. We have no "original" to go back to.
if (original != null)
switch (rowState)
{
case DataRowState.Added:
+ _table.DeleteRowFromIndexes (this);
_table.Rows.RemoveInternal (this);
break;
case DataRowState.Modified:
+ if ((_table.DataSet == null || _table.DataSet.EnforceConstraints) && !_table._duringDataLoad)
+ _table.Rows.ValidateDataRowInternal(this);
rowState = DataRowState.Unchanged;
break;
case DataRowState.Deleted:
rowState = DataRowState.Unchanged;
+ if ((_table.DataSet == null || _table.DataSet.EnforceConstraints) && !_table._duringDataLoad)
+ _table.Rows.ValidateDataRowInternal(this);
break;
}
// if so: FIXME ;)
if ((rowState & DataRowState.Added) > 0)
+ {
+ _table.DeleteRowFromIndexes (this);
_table.Rows.RemoveInternal (this);
+ // if row was in Added state we move it to Detached.
+ DetachRow();
+ }
}
}
/// <summary>
/// Sets the parent row of a DataRow with specified new parent DataRow.
/// </summary>
- [MonoTODO]
public void SetParentRow (DataRow parentRow)
{
SetParentRow(parentRow, null);
/// Sets the parent row of a DataRow with specified new parent DataRow and
/// DataRelation.
/// </summary>
- [MonoTODO]
public void SetParentRow (DataRow parentRow, DataRelation relation)
{
- if (_table == null || parentRow.Table == null)
- throw new RowNotInTableException();
+ if (_table == null || parentRow.Table == null || RowState == DataRowState.Detached)
+ throw new RowNotInTableException("This row has been removed from a table and does not have any data. BeginEdit() will allow creation of new data in this row.");
if (parentRow != null && _table.DataSet != parentRow.Table.DataSet)
throw new ArgumentException();
for(int i = 0; i < columns.Count; i++){
string columnName = columns[i].ColumnName;
- int index = row.Table.Columns.IndexOf(columnName);
+ DataColumn column = row.Table.Columns[columnName];
//if a column with the same name exists in both rows copy the values
- if(index != -1) {
+ if(column != null) {
+ int index = column.Ordinal;
if (HasVersion(DataRowVersion.Original))
{
if (row.original == null)
row.original = new object[row.Table.Columns.Count];
- row.original[index] = row.SetColumnValue(original[i], index);
+ row.original[index] = row.SetColumnValue(original[i], column, index);
}
if (HasVersion(DataRowVersion.Current))
{
if (row.current == null)
row.current = new object[row.Table.Columns.Count];
- row.current[index] = row.SetColumnValue(current[i], index);
+ row.current[index] = row.SetColumnValue(current[i], column, index);
}
if (HasVersion(DataRowVersion.Proposed))
{
if (row.proposed == null)
row.proposed = new object[row.Table.Columns.Count];
- row.proposed[index] = row.SetColumnValue(proposed[i], index);
+ row.proposed[index] = row.SetColumnValue(proposed[i], column, index);
}
//Saving the current value as the column value
}
- public void CollectionChanged(object sender, System.ComponentModel.CollectionChangeEventArgs args)
+ private void CollectionChanged(object sender, System.ComponentModel.CollectionChangeEventArgs args)
{
// if a column is added we hava to add an additional value the
// the priginal, current and propoed arrays.
if (args.Action == System.ComponentModel.CollectionChangeAction.Add)
{
object[] tmp;
+ int index = this.Table.Columns.Count - 1;
if (current != null)
{
- tmp = new object[current.Length + 1];
+ tmp = new object [index + 1];
Array.Copy (current, tmp, current.Length);
- tmp[tmp.Length - 1] = DBNull.Value;
+ tmp[tmp.Length - 1] = SetColumnValue(null, this.Table.Columns[index], index);
current = tmp;
}
if (proposed != null)
{
- tmp = new object[proposed.Length + 1];
+ tmp = new object [index + 1];
Array.Copy (proposed, tmp, proposed.Length);
- tmp[tmp.Length - 1] = DBNull.Value;
+ tmp[tmp.Length - 1] = SetColumnValue(null, this.Table.Columns[index], index);
proposed = tmp;
}
if(original != null)
{
- tmp = new object[original.Length + 1];
+ tmp = new object [index + 1];
Array.Copy (original, tmp, original.Length);
- tmp[tmp.Length - 1] = DBNull.Value;
+ tmp[tmp.Length - 1] = SetColumnValue(null, this.Table.Columns[index], index);
original = tmp;
}
}
}
+ internal void onColumnRemoved(int columnIndex)
+ {
+ // when column removed we have to compress row values in the way
+ // they will correspond to new column ordinals
+
+ object[] tmp;
+ if (current != null)
+ {
+ tmp = new object[current.Length - 1];
+ // copy values before removed column
+ if (columnIndex > 0)
+ Array.Copy (current, 0, tmp, 0, columnIndex);
+ // copy values after removed column
+ if(columnIndex < current.Length - 1)
+ Array.Copy(current, columnIndex + 1, tmp, columnIndex, current.Length - 1 - columnIndex);
+
+ current = tmp;
+ }
+ if (proposed != null)
+ {
+ tmp = new object[proposed.Length - 1];
+ // copy values before removed column
+ if (columnIndex > 0)
+ Array.Copy (proposed, 0, tmp, 0, columnIndex);
+ // copy values after removed column
+ if(columnIndex < proposed.Length - 1)
+ Array.Copy(proposed, columnIndex + 1, tmp, columnIndex, proposed.Length - 1 - columnIndex);
+
+ proposed = tmp;
+ }
+ if (original != null)
+ {
+ tmp = new object[original.Length - 1];
+ // copy values before removed column
+ if (columnIndex > 0)
+ Array.Copy (original, 0, tmp, 0, columnIndex);
+ // copy values after removed column
+ if(columnIndex < original.Length - 1)
+ Array.Copy(original, columnIndex + 1, tmp, columnIndex, original.Length - 1 - columnIndex);
+
+ original = tmp;
+ }
+ }
+
internal bool IsRowChanged(DataRowState rowState) {
if((RowState & rowState) != 0)
return true;
}
}
- internal void CheckNullConstraints()\r
- {\r
- if (_nullConstraintViolation)\r
- {\r
- for (int i = 0; i < proposed.Length; i++)\r
- {\r
- if (this[i] == DBNull.Value && !_table.Columns[i].AllowDBNull)\r
- throw new NoNullAllowedException(_nullConstraintMessage);\r
- }\r
- _nullConstraintViolation = false;\r
- }\r
+ // checks existance of value in version pecified
+ // note : this one relies on the same algorithm as this[int,DataRowVersion]
+ private bool CanAccess(int columnIndex, DataRowVersion version)
+ {
+ if (columnIndex < 0 || columnIndex > _table.Columns.Count)
+ return false;
+ // Accessing deleted rows
+ if (rowState == DataRowState.Deleted && version != DataRowVersion.Original)
+ return false;
+
+ if (HasVersion(version))
+ {
+ object[] versionArr;
+ switch (version)
+ {
+ case DataRowVersion.Default:
+ if (editing || rowState == DataRowState.Detached) {
+ versionArr = proposed;
+ }
+ else {
+ versionArr = current;
+ }
+ break;
+ case DataRowVersion.Proposed:
+ versionArr = proposed;
+ break;
+ case DataRowVersion.Current:
+ versionArr = current;
+ break;
+ case DataRowVersion.Original:
+ versionArr = original;
+ break;
+ default:
+ return false;
+ }
+
+ return (versionArr != null && columnIndex < versionArr.Length);
+ }
+
+ return false;
}
+ internal void CheckNullConstraints()
+ {
+ if (_nullConstraintViolation) {
+ if (proposed != null) {
+ for (int i = 0; i < proposed.Length; i++) {
+ if (this[i] == DBNull.Value && !_table.Columns[i].AllowDBNull)
+ throw new NoNullAllowedException(_nullConstraintMessage);
+ }
+ }
+ _nullConstraintViolation = false;
+ }
+ }
+
+ internal void CheckReadOnlyStatus()
+ {
+ if (proposed == null)
+ return;
+
+ for (int i = 0; i < proposed.Length; i++) {
+ if (this[i] != proposed[i] && _table.Columns[i].ReadOnly)
+ throw new ReadOnlyException();
+ }
+
+ }
+
#endregion // Methods
}
projects / mono.git / blobdiff