DataRowView.CancelEdit 方法

定義

命名空間:

System.Data

組件:

System.Data.Common.dll

來源:

DataRowView.cs

取消編輯程序。

public:
 virtual void CancelEdit();

public void CancelEdit ();

abstract member CancelEdit : unit -> unit
override this.CancelEdit : unit -> unit

Public Sub CancelEdit ()

實作

CancelEdit()

範例

下列範例會編輯 中的數據 DataView列。 如果驗證失敗，則會 CancelEdit 呼叫 方法來取消變更。

private void EditDataRowView(DataRowView rowView,
    string columnToEdit)
{
    rowView.BeginEdit();
    rowView[columnToEdit] = textBox1.Text;

    // Validate the input with a function.
    if (ValidateCompanyName(rowView[columnToEdit]))
        rowView.EndEdit();
    else
        rowView.CancelEdit();
}

private bool ValidateCompanyName(object valuetoCheck)
{
    // Insert code to validate the value.
    return true;
}

Private Sub EditDataRowView(rowView As DataRowView, _
    columnToEdit As String)
    rowView.BeginEdit()
    rowView(columnToEdit) = textBox1.Text

    ' Validate the input with a function.
    If ValidateCompanyName(rowView(columnToEdit)) Then
        rowView.EndEdit()
    Else
        rowView.CancelEdit()
    End If
End Sub
     
Private Function ValidateCompanyName( _
    valuetoCheck As Object) As Boolean
    ' Insert code to validate the value.
    Return True
End Function

備註

呼叫 CancelEdit之後，數據列的所有變更都會回復。 您也可以在父 DataTable代 上呼叫 RejectChanges 來復原變更。

另請參閱

• AcceptChanges()
• AllowDelete
• AllowEdit
• AllowNew
• BeginEdit()
• DataRow
• EndEdit()
• RowVersion