BeforeAddDataBoundRowEventHandler (Delegado)
Representa el método que controlará el evento BeforeAddDataBoundRow de ListObject.
Espacio de nombres: Microsoft.Office.Tools.Excel
Ensamblado: Microsoft.Office.Tools.Excel (en Microsoft.Office.Tools.Excel.dll)
Sintaxis
'Declaración
Public Delegate Sub BeforeAddDataBoundRowEventHandler ( _
sender As Object, _
e As BeforeAddDataBoundRowEventArgs _
)
public delegate void BeforeAddDataBoundRowEventHandler(
Object sender,
BeforeAddDataBoundRowEventArgs e
)
Parámetros
- sender
Tipo: System.Object
Origen del evento.
- e
Tipo: Microsoft.Office.Tools.Excel.BeforeAddDataBoundRowEventArgs
Objeto BeforeAddDataBoundRowEventArgs que contiene los datos del evento.
Comentarios
Cuando se crea un delegado de BeforeAddDataBoundRowEventHandler, se identifica el método que controlará el evento.Para asociar el evento al controlador de eventos, agregue al evento una instancia del delegado.Se llama al controlador de eventos siempre que se produce el evento, hasta que se quita el delegado.Para obtener más información acerca de delegados, vea Eventos y delegados.
Ejemplos
El ejemplo de código siguiente crea DataTable y ListObject, y enlaza el control ListObject al control DataTable.A continuación, crea un controlador de eventos BeforeAddDataBoundRow que cancela la incorporación de la nueva fila.Para probar el evento, agregue manualmente una nueva fila a ListObject en la hoja 1.
Se trata de un ejemplo para una personalización en el nivel del documento.
WithEvents BeforeAddDataBoundRowList As _
Microsoft.Office.Tools.Excel.ListObject
Private Sub ListObject_BeforeAddDataBoundRow()
' Create a new DataSet and DataTable.
Dim ds As New DataSet()
Dim dt As DataTable = ds.Tables.Add("Customers")
dt.Columns.Add(New DataColumn("LastName"))
dt.Columns.Add(New DataColumn("FirstName"))
' Add a new row to the DataTable.
Dim dr As DataRow = dt.NewRow()
dr("LastName") = "Chan"
dr("FirstName") = "Gareth"
dt.Rows.Add(dr)
' Create a list object.
BeforeAddDataBoundRowList = _
Me.Controls.AddListObject(Me.Range("A1"), _
"BeforeAddDataBoundRowList")
' Bind the list object to the DataTable.
BeforeAddDataBoundRowList.AutoSetDataBoundColumnHeaders = True
BeforeAddDataBoundRowList.SetDataBinding(ds, "Customers", _
"LastName", "FirstName")
End Sub
Private Sub List1_BeforeAddDataBoundRow(ByVal sender As Object, _
ByVal e As Microsoft.Office.Tools.Excel.BeforeAddDataBoundRowEventArgs) _
Handles BeforeAddDataBoundRowList.BeforeAddDataBoundRow
e.Cancel = True
MessageBox.Show("This data is read-only.")
End Sub
private void ListObject_BeforeAddDataBoundRow()
{
// Create a new DataSet and DataTable.
DataSet ds = new DataSet();
DataTable dt = ds.Tables.Add("Customers");
dt.Columns.Add(new DataColumn("LastName"));
dt.Columns.Add(new DataColumn("FirstName"));
// Add a new row to the DataTable.
DataRow dr = dt.NewRow();
dr["LastName"] = "Chan";
dr["FirstName"] = "Gareth";
dt.Rows.Add(dr);
// Create a list object.
Microsoft.Office.Tools.Excel.ListObject list1 =
this.Controls.AddListObject(
this.Range["A1"], "list1");
// Bind the list object to the DataTable.
list1.AutoSetDataBoundColumnHeaders = true;
list1.SetDataBinding(ds, "Customers", "LastName",
"FirstName");
// Create the event handler.
list1.BeforeAddDataBoundRow += new
Microsoft.Office.Tools.Excel.
BeforeAddDataBoundRowEventHandler(
list1_BeforeAddDataBoundRow);
}
void list1_BeforeAddDataBoundRow(object sender,
Microsoft.Office.Tools.Excel.BeforeAddDataBoundRowEventArgs e)
{
e.Cancel = true;
MessageBox.Show("This data is read-only.");
}