//
// Author:
// Daniel Morgan <danmorg@sc.rr.com>
+// Alan Tam Siu Lung <Tam@SiuLung.com>
+// Tim Coleman <tim@timcoleman.com>
//
// (C) 2002 Daniel Morgan
// (C) 2002 Ximian, Inc.
+// Copyright (C) Tim Coleman, 2003
//
using System;
+using System.ComponentModel;
using System.Runtime.Serialization;
namespace System.Data
/// DataRelation is used for a parent/child relationship
/// between two DataTable objects
/// </summary>
+ [Editor]
+ [DefaultProperty ("RelationName")]
[Serializable]
public class DataRelation {
+ private DataSet dataSet;
+ private string relationName;
+ private UniqueConstraint parentKeyConstraint;
+ private ForeignKeyConstraint childKeyConstraint;
+ private DataColumn[] parentColumns;
+ private DataColumn[] childColumns;
+ private bool nested;
+ internal bool createConstraints;
+ private PropertyCollection extendedProperties;
+ private PropertyChangedEventHandler onPropertyChangingDelegate;
#region Constructors
- [MonoTODO]
- public DataRelation(string relationName,
- DataColumn parentColumn, DataColumn childColumn) {
-
- throw new NotImplementedException ();
+ public DataRelation (string relationName, DataColumn parentColumn, DataColumn childColumn)
+ : this(relationName, parentColumn, childColumn, true)
+ {
+ }
+
+ public DataRelation (string relationName, DataColumn[] parentColumns, DataColumn[] childColumns)
+ : this(relationName, parentColumns, childColumns, true)
+ {
+ }
+
+ public DataRelation (string relationName, DataColumn parentColumn, DataColumn childColumn, bool createConstraints)
+ : this(relationName, new DataColumn[] { parentColumn }, new DataColumn[] { childColumn }, createConstraints)
+ {
+ }
+
+ public DataRelation (string relationName, DataColumn[] parentColumns, DataColumn[] childColumns, bool createConstraints)
+ {
+ this.extendedProperties = new PropertyCollection();
+ if (relationName == null) relationName = string.Empty;
+ this.relationName = relationName;
+ if (parentColumns == null) throw new ArgumentNullException ();
+ this.parentColumns = parentColumns;
+ if (childColumns == null) throw new ArgumentNullException ();
+ this.childColumns = childColumns;
+ this.createConstraints = createConstraints;
+ if (parentColumns.Length != childColumns.Length)
+ throw new ArgumentException ("ParentColumns and ChildColumns should be the same length");
+ DataTable parentTable = parentColumns[0].Table;
+ DataTable childTable = childColumns[0].Table;
+ if (parentTable.DataSet != childTable.DataSet)
+ throw new InvalidConstraintException ();
+ foreach (DataColumn column in parentColumns)
+ if (column.Table != parentTable)
+ throw new InvalidConstraintException ();
+ foreach (DataColumn column in childColumns)
+ if (column.Table != childTable)
+ throw new InvalidConstraintException ();
}
[MonoTODO]
- public DataRelation(string relationName,
- DataColumn[] parentColumns,
- DataColumn[] childColumns) {
-
+ [Browsable (false)]
+ public DataRelation (string relationName, string parentTableName, string childTableName, string[] parentColumnNames, string[] childColumnNames, bool nested)
+ {
throw new NotImplementedException ();
}
+#if NET_1_2
[MonoTODO]
- public DataRelation(string relationName,
- DataColumn parentColumn, DataColumn childColumn,
- bool createConstraints) {
-
- throw new NotImplementedException ();
- }
-
- [MonoTODO]
- public DataRelation(string relationName,
- DataColumn[] parentColumns, DataColumn[] childColumns,
- bool createConstraints) {
-
- throw new NotImplementedException ();
- }
-
- [MonoTODO]
- public DataRelation(string relationName,
- string parentTableName, string childTableName,
- string[] parentColumnNames, string[] childColumnNames,
- bool nested) {
-
+ public DataRelation (string relationName, string parentTableName, string parentTableNamespace, string childTableName, string childTableNamespace, string[] parentColumnNames, string[] childColumnNames, bool nested)
+ {
throw new NotImplementedException ();
}
+#endif
#endregion // Constructors
#region Properties
+ [DataCategory ("Data")]
+ [DataSysDescription ("Indicates the child columns of this relation.")]
public virtual DataColumn[] ChildColumns {
- [MonoTODO]
get {
- throw new NotImplementedException ();
+ return childColumns;
}
}
public virtual ForeignKeyConstraint ChildKeyConstraint {
- [MonoTODO]
get {
- throw new NotImplementedException ();
+ return childKeyConstraint;
}
}
+ internal void SetChildKeyConstraint(ForeignKeyConstraint foreignKeyConstraint) {
+ childKeyConstraint = foreignKeyConstraint;
+ }
+
public virtual DataTable ChildTable {
- [MonoTODO]
get {
- throw new NotImplementedException ();
+ return childColumns[0].Table;
}
}
+ [Browsable (false)]
+ [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
public virtual DataSet DataSet {
- [MonoTODO]
get {
- throw new NotImplementedException ();
+ return childColumns[0].Table.DataSet;
}
}
+ [Browsable (false)]
+ [DataCategory ("Data")]
+ [DataSysDescription ("The collection that holds custom user information.")]
public PropertyCollection ExtendedProperties {
- [MonoTODO]
get {
- throw new NotImplementedException ();
+ if (extendedProperties == null)
+ extendedProperties = new PropertyCollection();
+ return extendedProperties;
}
}
+ [DataCategory ("Data")]
+ [DataSysDescription ("Indicates whether relations are nested.")]
+ [DefaultValue (false)]
public virtual bool Nested {
- [MonoTODO]
get {
- throw new NotImplementedException ();
+ return nested;
}
- [MonoTODO]
set {
- throw new NotImplementedException ();
+ nested = value;
}
}
+ [DataCategory ("Data")]
+ [DataSysDescription ("Indicates the parent columns of this relation.")]
public virtual DataColumn[] ParentColumns {
- [MonoTODO]
get {
- throw new NotImplementedException ();
+ return parentColumns;
}
}
public virtual UniqueConstraint ParentKeyConstraint {
- [MonoTODO]
get {
- throw new NotImplementedException ();
+ return parentKeyConstraint;
}
}
+ internal void SetParentKeyConstraint(UniqueConstraint uniqueConstraint) {
+ parentKeyConstraint = uniqueConstraint;
+ }
+
+ internal void SetDataSet(DataSet ds) {
+ dataSet = ds;
+ }
+
public virtual DataTable ParentTable {
- [MonoTODO]
get {
- throw new NotImplementedException ();
+ return parentColumns[0].Table;
}
}
+ [DataCategory ("Data")]
+ [DataSysDescription ("The name used to look up this relation in the Relations collection of a DataSet.")]
+ [DefaultValue ("")]
public virtual string RelationName {
- [MonoTODO]
get {
- throw new NotImplementedException ();
+ return relationName;
}
- [MonoTODO]
set {
- throw new NotImplementedException ();
+ relationName = value;
}
}
#region Methods
- [MonoTODO]
- public override string ToString() {
- throw new NotImplementedException ();
+ protected void CheckStateForProperty ()
+ {
+ // TODO: check consistency of constraints
+ DataTable parentTable = parentColumns[0].Table;
+ DataTable childTable = parentColumns[0].Table;
+ if (parentTable.DataSet != childTable.DataSet)
+ throw new DataException ();
+ bool allColumnsEqual = false;
+ for (int colCnt = 0; colCnt < parentColumns.Length; ++colCnt) {
+ if (!parentColumns [colCnt].DataType.Equals (childColumns [colCnt].DataType))
+ throw new DataException ();
+ if (parentColumns [colCnt] != childColumns [colCnt]) allColumnsEqual = false;
+ }
+ if (allColumnsEqual) throw new DataException ();
}
- [MonoTODO]
- protected void CheckStateForProperty() {
- throw new NotImplementedException ();
+ protected internal void OnPropertyChanging (PropertyChangedEventArgs pcevent)
+ {
+ if (onPropertyChangingDelegate != null)
+ onPropertyChangingDelegate (this, pcevent);
+ }
+
+ protected internal void RaisePropertyChanging (string name)
+ {
+ OnPropertyChanging(new PropertyChangedEventArgs(name));
+ }
+
+ public override string ToString ()
+ {
+ return relationName;
}
#endregion // Methods
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