DataGridViewCellValidatingEventArgs Class
Provides data for the CellValidating event of a DataGridView control.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
The DataGridView.CellValidating event lets you cancel changes to the current cell when the new value is not valid. Use the FormattedValue property to determine the current value. To determine the state of the current cell, use the RowIndex and ColumnIndex properties to access the cell through the DataGridView.Rows collection. To cancel the change, set the Cancel property to true.
When this event is canceled in data-bound mode, the new value is not pushed to the underlying data source. When this event is canceled in virtual mode, the DataGridView.CellValuePushed event will not be raised.
The following code example handles the CellValidating event to ensure that only positive integers are entered by the user. This example is part of a larger example available in the VirtualMode reference topic.
Private Sub dataGridView1_CellValidating(ByVal sender As Object, _ ByVal e _ As DataGridViewCellValidatingEventArgs) _ Handles dataGridView1.CellValidating Me.dataGridView1.Rows(e.RowIndex).ErrorText = "" Dim newInteger As Integer ' Don't try to validate the 'new row' until finished ' editing since there ' is not any point in validating its initial value. If dataGridView1.Rows(e.RowIndex).IsNewRow Then Return If Not Integer.TryParse(e.FormattedValue.ToString(), newInteger) _ OrElse newInteger < 0 Then e.Cancel = True Me.dataGridView1.Rows(e.RowIndex).ErrorText = "the value must be a non-negative integer" End If End Sub
System.EventArgs
System.ComponentModel.CancelEventArgs
System.Windows.Forms.DataGridViewCellValidatingEventArgs
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.