DataGridView.CellValidating Evento

Definición

Se produce cuando una celda pierde el foco de entrada. Habilita la validación de contenido.Occurs when a cell loses input focus, enabling content validation.

public:
 event System::Windows::Forms::DataGridViewCellValidatingEventHandler ^ CellValidating;
public event System.Windows.Forms.DataGridViewCellValidatingEventHandler CellValidating;
member this.CellValidating : System.Windows.Forms.DataGridViewCellValidatingEventHandler 
Public Custom Event CellValidating As DataGridViewCellValidatingEventHandler 

Ejemplos

En el ejemplo de código siguiente se controla el evento CellValidating para asegurarse de que solo el usuario escribe los enteros positivos.The following code example handles the CellValidating event to ensure that only positive integers are entered by the user. Este ejemplo forma parte de un ejemplo más grande disponible en el tema de referencia VirtualMode.This example is part of a larger example available in the VirtualMode reference topic.

void VirtualConnector::dataGridView1_CellValidating
    (Object^ sender, DataGridViewCellValidatingEventArgs^ e)
{
    int newInteger;

    // 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) 
    {
        return; 
    }
    if (!Int32::TryParse(e->FormattedValue->ToString(), 
        newInteger) || (newInteger < 0))
    {
        e->Cancel = true;
    }
}
private void dataGridView1_CellValidating(object sender,
    DataGridViewCellValidatingEventArgs e)
{
    dataGridView1.Rows[e.RowIndex].ErrorText = "";
    int newInteger;

    // 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) { return; }
    if (!int.TryParse(e.FormattedValue.ToString(),
        out newInteger) || newInteger < 0)
    {
        e.Cancel = true;
        dataGridView1.Rows[e.RowIndex].ErrorText = "the value must be a non-negative integer";
    }
}
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

Comentarios

Al cancelar este evento, se cancelan los cambios realizados en la celda actual.Canceling this event cancels the changes to the current cell. Cuando este evento se cancela en el modo enlazado a datos, el nuevo valor no se inserta en el origen de datos subyacente.When this event is canceled in data-bound mode, the new value is not pushed to the underlying data source. Cuando este evento se cancela en modo virtual, no se generará el evento CellValuePushed.When this event is canceled in virtual mode, the CellValuePushed event will not be raised.

Controle el evento CellValidated para realizar el procesamiento posterior a la validación.Handle the CellValidated event to perform post-validation processing.

Para obtener más información acerca de cómo controlar eventos, vea controlar y provocar eventos.For more information about how to handle events, see Handling and Raising Events.

Se aplica a

Consulte también: