DataTable.RowDeleted Ereignis
Wichtig
Einige Informationen beziehen sich auf Vorabversionen, die vor dem Release ggf. grundlegend überarbeitet werden. Microsoft übernimmt hinsichtlich der hier bereitgestellten Informationen keine Gewährleistungen, seien sie ausdrücklich oder konkludent.
Tritt ein, nachdem eine Zeile in der Tabelle gelöscht wurde.
public:
event System::Data::DataRowChangeEventHandler ^ RowDeleted;
public event System.Data.DataRowChangeEventHandler? RowDeleted;
public event System.Data.DataRowChangeEventHandler RowDeleted;
[System.Data.DataSysDescription("DataTableRowDeletedDescr")]
public event System.Data.DataRowChangeEventHandler RowDeleted;
member this.RowDeleted : System.Data.DataRowChangeEventHandler
[<System.Data.DataSysDescription("DataTableRowDeletedDescr")>]
member this.RowDeleted : System.Data.DataRowChangeEventHandler
Public Custom Event RowDeleted As DataRowChangeEventHandler
- Attribute
private static void DataTableRowDeleted()
{
DataTable customerTable = new DataTable("Customers");
// add columns
customerTable.Columns.Add("id", typeof(int));
customerTable.Columns.Add("name", typeof(string));
customerTable.Columns.Add("address", typeof(string));
// set PrimaryKey
customerTable.Columns[ "id" ].Unique = true;
customerTable.PrimaryKey = new DataColumn[] { customerTable.Columns["id"] };
// add a RowDeleted event handler for the table.
customerTable.RowDeleted += new DataRowChangeEventHandler(Row_Deleted);
// add ten rows
for(int id=1; id<=10; id++)
{
customerTable.Rows.Add(
new object[] { id, string.Format("customer{0}", id),
string.Format("address{0}", id) });
}
customerTable.AcceptChanges();
// Delete all the rows
foreach(DataRow row in customerTable.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);
}
Private Sub DataTableRowDeleted()
Dim customerTable As New DataTable("Customers")
' add columns
customerTable.Columns.Add("id", Type.GetType("System.Int32"))
customerTable.Columns.Add("name", Type.GetType("System.String"))
customerTable.Columns.Add("address", Type.GetType("System.String"))
' set PrimaryKey
customerTable.Columns("id").Unique = True
customerTable.PrimaryKey = New DataColumn() {customerTable.Columns("id")}
' add a RowDeleted event handler for the table.
AddHandler customerTable.RowDeleted, New _
DataRowChangeEventHandler(AddressOf Row_Deleted)
' add ten rows
Dim id As Integer
For id = 1 To 10
customerTable.Rows.Add( _
New Object() {id, String.Format("customer{0}", id), _
String.Format("address{0}", id)})
Next
customerTable.AcceptChanges()
' Delete all the rows
Dim row As DataRow
For Each row In customerTable.Rows
row.Delete()
Next
End Sub
Private Sub Row_Deleted(ByVal sender As Object, _
ByVal e As DataRowChangeEventArgs)
Console.WriteLine("Row_Deleted Event: name={0}; action={1}", _
e.Row("name", DataRowVersion.Original), e.Action)
End Sub
Weitere Informationen finden Sie unter Behandeln von DataTable-Ereignissen.
Produkt | Versionen |
---|---|
.NET | Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
.NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET Standard | 2.0, 2.1 |
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