System.Data Namespace

Represents the method that will handle the RowChanging, RowChanged, RowDeleting, and RowDeleted events of a DataTable.

[ VB ]
Public Delegate Sub DataRowChangeEventHandler ( _
   ByVal sender As Object, _
   ByVal e As DataRowChangeEventArgs _
)

[ C# ]
Public delegate void DataRowChangeEventHandler (
   object sender,
   DataRowChangeEventArgs e
);

[ C++ ]
Public __gc __delegate void DataRowChangeEventHandler (
   Object* sender,
   DataRowChangeEventArgs* e
);

In [ JScript ], you can use the delegates in the .NET Framework, but you cannot define your own.

The declaration of your event handler must have the same parameters as the DataRowChangeEventHandler delegate declaration.

sender

The source of the event.

e

A DataRowChangeEventArgs that contains the event data.

When you create a DataRowChangeEventHandler delegate, you identify the method that will handle the event. To associate the event with your event handler, add an instance of the delegate to the event. The event handler is called whenever the event occurs, until you remove the delegate. For more information about delegates, see Web Forms Events and Handlers.

The following example adds a DataRowChangeEventHandler and the procedure to handle the event when a row is changed. The procedure prints the action and value of the changed row.

private DataTable myTable;
private void AddHandler ( ) {
   myTable = new DataTable ( "myTable" );
   myTable.RowChanged + = 
      new DataRowChangeEventHandler ( myTable_Changed );
}
protected void myTable_Changed ( object sender,
      System.Data.DataRowChangeEventArgs e ) {
   Response.Write ( "Row Changed", e.Action,
      e.Row [ myDataGrid.CurrentCell.ColumnNumber ] );
}

Private myTable As DataTable
Private Sub [ AddHandler ] ( )
   myTable = New DataTable ( "myTable" )
   AddHandler myTable.RowChanged, AddressOf myTable_Changed
End Sub

Protected Sub myTable_Changed ( sender As Object, _
      e As System.Data.DataRowChangeEventArgs )
   Response.Write ( "Row Changed", e.Action, _
      e.Row ( myDataGrid.CurrentCell.ColumnNumber ) )
End Sub

DataRow   DataTable   DataRowChangeEventArgs