DataTable.RowChanging Event
.NET Framework 2.0
Occurs when a DataRow is changing.
Namespace: System.Data
Assembly: System.Data (in system.data.dll)
DataTable Members
System.Data Namespace
Assembly: System.Data (in system.data.dll)
'Declaration Public Event RowChanging As DataRowChangeEventHandler 'Usage Dim instance As DataTable Dim handler As DataRowChangeEventHandler AddHandler instance.RowChanging, handler
/** @event */ public void add_RowChanging (DataRowChangeEventHandler value) /** @event */ public void remove_RowChanging (DataRowChangeEventHandler value)
JScript supports the use of events, but not the declaration of new ones.
For more information, see Working with DataTable Events.
Private Sub DataTableRowChanging() 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 RowChanging event handler for the table. AddHandler custTable.RowChanging, _ New DataRowChangeEventHandler(AddressOf Row_Changing) ' 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 Sub Row_Changing(ByVal sender As Object, _ ByVal e As DataRowChangeEventArgs) Console.WriteLine("Row_Changing Event: name={0; action={1", _ e.Row("name"), e.Action) End Sub
Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.
Reference
DataTable ClassDataTable Members
System.Data Namespace
Other Resources
Creating and Using DataTablesCommunity Additions
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