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DataTable.RowChanged Event
.NET Framework 1.1
Occurs after a DataRow has been changed successfully.
[Visual Basic] Public Event RowChanged As DataRowChangeEventHandler [C#] public event DataRowChangeEventHandler RowChanged; [C++] public: __event DataRowChangeEventHandler* RowChanged;
[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 DataTableRowChanged() 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 RowChanged event handler for the table. AddHandler custTable.RowChanged, New DataRowChangeEventHandler( AddressOf Row_Changed ) ' 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() ' change the name column in all the rows Dim row As DataRow For Each row In custTable.Rows row("name") = string.Format( "vip{0}", row("id") ) Next End Sub Private Shared Sub Row_Changed(sender As Object, e As DataRowChangeEventArgs) Console.WriteLine( "Row_Changed Event: name={0}; action={1}", _ e.Row("name"), e.Action) End Sub [C#] private static void DataTableRowChanged() { 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 RowChanged event handler for the table. custTable.RowChanged += new DataRowChangeEventHandler( Row_Changed ); // 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(); // change the name column in all the rows foreach( DataRow row in custTable.Rows ) { row["name"] = string.Format( "vip{0}", row["id"] ); } } private static void Row_Changed( object sender, DataRowChangeEventArgs e ) { Console.WriteLine( "Row_Changed Event: name={0}; action={1}", e.Row["name"], e.Action ); } [C++] public: static void DataTableRowChanged() { 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 RowChanged event handler for the table. custTable->RowChanged += new DataRowChangeEventHandler(0, Row_Changed); // 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(); // change the name column in all the rows System::Collections::IEnumerator* myEnum = custTable->Rows->GetEnumerator(); while (myEnum->MoveNext()) { DataRow* row = __try_cast<DataRow*>(myEnum->Current); row->Item[S"name"] = String::Format(S"vip {0}", row->Item[S"id"]); } } public: static void Row_Changed(Object* sender, System::Data::DataRowChangeEventArgs* e) { Console::WriteLine(S"Row_Changed Event: name= {0}; action= {1}", e->Row->Item[S"name"],__box( 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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