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DataTable.RowDeleting Event

Occurs before a row in the table is about to be deleted.

[Visual Basic]
Public Event RowDeleting As DataRowChangeEventHandler
[C#]
public event DataRowChangeEventHandler RowDeleting;
[C++]
public: __event DataRowChangeEventHandler* RowDeleting;

[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 DataTableRowDeleting()
    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 RowDeleting event handler for the table.
    AddHandler custTable.RowDeleting, New DataRowChangeEventHandler( AddressOf Row_Deleting )


    ' 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_Deleting(sender As Object, e As DataRowChangeEventArgs)
    Console.WriteLine( "Row_Deleting Event: name={0}; action={1}", _
        e.Row("name"), e.Action) 
End Sub

[C#] 
private static void DataTableRowDeleting()
{
    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 RowDeleting event handler for the table.
    custTable.RowDeleting += new DataRowChangeEventHandler( Row_Deleting );


    // 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_Deleting( object sender, DataRowChangeEventArgs e )
{
    Console.WriteLine( "Row_Deleting Event: name={0}; action={1}", 
        e.Row["name"], e.Action );
}

[C++] 

public:

static void Row_Deleting(Object* sender, System::Data::DataRowChangeEventArgs* e)
{
    Console::WriteLine(S"Row_Deleting Event: name= {0}; action= {1}",
        e->Row->Item[S"name"], __box(e->Action));
};

static void DataTableRowDeleting()
{
    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 RowDeleting event handler for the table.
    custTable->RowDeleting += new DataRowChangeEventHandler(0, Row_Deleting);

    // 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();
    }

};

[JScript] No example is available for JScript. To view a Visual Basic, C#, or C++ example, click the Language Filter button Language Filter in the upper-left corner of the page.

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

DataTable Class | DataTable Members | System.Data Namespace

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