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DataTable.RowDeleted Event
.NET Framework 1.1
Occurs after a row in the table has been deleted.
[Visual Basic] Public Event RowDeleted As DataRowChangeEventHandler [C#] public event DataRowChangeEventHandler RowDeleted; [C++] public: __event DataRowChangeEventHandler* RowDeleted;
[JScript] In JScript, you can handle the events defined by a class, but you cannot define your own.
Event Data
The event handler receives an argument of type DataRowChangeEventArgs containing data related to this event. The following DataRowChangeEventArgs properties provide information specific to this event.
| Property | Description |
|---|---|
| Action | Gets the action that has occurred on a DataRow. |
| Row | Gets the row upon which an action has occurred. |
Remarks
For more information see Working with DataTable Events.
Example
[Visual Basic] Private Shared Sub DataTableRowDeleted() Dim custTable As DataTable = New DataTable("Customers") ' add columns custTable.Columns.Add( "id", Type.GetType("System.Int32") ) custTable.Columns.Add( "name", Type.GetType("System.String") ) custTable.Columns.Add( "address", Type.GetType("System.String") ) ' set PrimaryKey custTable.Columns( "id" ).Unique = true custTable.PrimaryKey = New DataColumn() { custTable.Columns("id") } ' add a RowDeleted event handler for the table. AddHandler custTable.RowDeleted, New DataRowChangeEventHandler( AddressOf Row_Deleted ) ' add ten rows Dim id As Integer For id = 1 To 10 custTable.Rows.Add( _ New Object() { id, string.Format("customer{0}", id), string.Format("address{0}", id) } ) Next custTable.AcceptChanges() ' Delete all the rows Dim row As DataRow For Each row In custTable.Rows row.Delete() Next End Sub Private Shared Sub Row_Deleted(sender As Object, e As DataRowChangeEventArgs) Console.WriteLine( "Row_Deleted Event: name={0}; action={1}", _ e.Row("name", DataRowVersion.Original), e.Action) End Sub [C#] private static void DataTableRowDeleted() { DataTable custTable = new DataTable("Customers"); // add columns custTable.Columns.Add( "id", typeof(int) ); custTable.Columns.Add( "name", typeof(string) ); custTable.Columns.Add( "address", typeof(string) ); // set PrimaryKey custTable.Columns[ "id" ].Unique = true; custTable.PrimaryKey = new DataColumn[] { custTable.Columns["id"] }; // add a RowDeleted event handler for the table. custTable.RowDeleted += new DataRowChangeEventHandler( Row_Deleted ); // add ten rows for( int id=1; id<=10; id++ ) { custTable.Rows.Add( new object[] { id, string.Format("customer{0}", id), string.Format("address{0}", id) } ); } custTable.AcceptChanges(); // Delete all the rows foreach( DataRow row in custTable.Rows ) row.Delete(); } private static void Row_Deleted( object sender, DataRowChangeEventArgs e ) { Console.WriteLine( "Row_Deleted Event: name={0}; action={1}", e.Row["name", DataRowVersion.Original], e.Action ); } [C++] public: static void DataTableRowDeleted() { DataTable* custTable = new DataTable(S"Customers"); // add columns custTable->Columns->Add(S"id", __typeof(int)); custTable->Columns->Add(S"name", __typeof(String)); custTable->Columns->Add(S"address", __typeof(String)); // set PrimaryKey custTable->Columns->Item[ S"id" ]->Unique = true; DataColumn* columnArray[] = { custTable->Columns->Item[S"id"] }; custTable->PrimaryKey = columnArray; // add a RowDeleted event handler for the table. custTable->RowDeleted += new DataRowChangeEventHandler(0, Row_Deleted); // add ten rows for (int id=1; id<=10; id++) { Object* temp0 [] = {__box(id), String::Format(S"customer {0}", __box(id)), String::Format(S"address {0}", __box(id)) }; custTable->Rows->Add(temp0); } custTable->AcceptChanges(); // Delete all the rows System::Collections::IEnumerator* myEnum = custTable->Rows->GetEnumerator(); while (myEnum->MoveNext()) { DataRow* row = __try_cast<DataRow*>(myEnum->Current); row->Delete(); } }; public: static void Row_Deleted(Object* sender, DataRowChangeEventArgs* e) { Console::WriteLine(S"Row_Deleted Event: name= {0}; action= {1}", e->Row->Item[S"name", static_cast<int>(DataRowVersion::Original), e->Action]); };
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Requirements
Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family
See Also
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