DataRow.Delete DataRow.Delete DataRow.Delete DataRow.Delete Method

Definición

Elimina DataRow.Deletes the DataRow.

public:
 void Delete();
public void Delete ();
member this.Delete : unit -> unit
Public Sub Delete ()

Excepciones

Ejemplos

En el ejemplo siguiente se crea una sencilla DataTable con dos columnas y diez filas.The following example creates a simple DataTable with two columns and ten rows. Después de eliminar varios DataRow elementos con el Delete método, una de las filas se han recuperado mediante la invocación RejectChanges.After deleting several DataRow items with the Delete method, one of the rows is undeleted by invoking RejectChanges.

private void DemonstrateDeleteRow()
{
    // Create a simple DataTable with two columns and ten rows.
    DataTable table = new DataTable("table");
    DataColumn idColumn = new DataColumn("id",
        Type.GetType("System.Int32"));
    idColumn.AutoIncrement=true;
    DataColumn itemColumn = new DataColumn("item", 
        Type.GetType("System.String"));
    table.Columns.Add(idColumn);
    table.Columns.Add(itemColumn);

    // Add ten rows.
    DataRow newRow;
     
    for(int i = 0; i <10; i++)
    {
        newRow = table.NewRow();
        newRow["item"] = "Item " + i;
        table.Rows.Add(newRow);
    }
    table.AcceptChanges();

    DataRowCollection itemColumns = table.Rows;
    itemColumns[0].Delete();
    itemColumns[2].Delete();
    itemColumns[3].Delete();
    itemColumns[5].Delete();
    Console.WriteLine(itemColumns[3].RowState.ToString());

    // Reject changes on one deletion.
    itemColumns[3].RejectChanges();

    // Change the value of the column so it stands out.
    itemColumns[3]["item"] = "Deleted, Undeleted, Edited";

    // Accept changes on others.
    table.AcceptChanges();

    // Print the remaining row values.
    foreach(DataRow row in table.Rows)
    {
        Console.WriteLine(row[0] + "\table" + row[1]);
    }
}
 Private Sub DemonstrateDeleteRow()
     ' Create a simple DataTable with two columns and ten rows.
     Dim table As New DataTable("table")
     Dim idColumn As New DataColumn("id", Type.GetType("System.Int32"))
     idColumn.AutoIncrement = True
     Dim itemColumn As New DataColumn("item", Type.GetType("System.String"))
     table.Columns.Add(idColumn)
     table.Columns.Add(itemColumn)

     ' Add ten rows.
     Dim newRow As DataRow
     
     Dim i As Integer
     For i = 0 To 9
         newRow = table.NewRow()
         newRow("item") = "Item " & i.ToString()
         table.Rows.Add(newRow)
     Next i
     table.AcceptChanges()

     Dim itemColumns As DataRowCollection = table.Rows
     itemColumns(0).Delete()
     itemColumns(2).Delete()
     itemColumns(3).Delete()
     itemColumns(5).Delete()
     Console.WriteLine(itemColumns(3).RowState.ToString())

     ' Reject changes on one deletion.
     itemColumns(3).RejectChanges()

     ' Change the value of the column so it stands out.
     itemColumns(3)("item") = "Deleted, Undeleted, Edited"

     ' Accept changes on others.
     table.AcceptChanges()

     ' Print the remaining row values.
     Dim row As DataRow
     For Each row In  table.Rows
         Console.WriteLine(row(0).ToString() & ControlChars.Tab _
            & row(1).ToString())
     Next row
End Sub

Comentarios

Si el RowState de la fila se agrega el RowState se convierte en Detached y se quita la fila de la tabla al llamar a AcceptChanges.If the RowState of the row is Added, the RowState becomes Detached and the row is removed from the table when you call AcceptChanges.

El RowState se convierte en Deleted después de usar el Delete método en una existente DataRow.The RowState becomes Deleted after you use the Delete method on an existing DataRow. Permanece Deleted hasta que llame a AcceptChanges.It remains Deleted until you call AcceptChanges. En este momento, el DataRow se quita de la tabla.At this time, the DataRow is removed from the table.

Delete no debe llamarse en un bucle foreach al recorrer un DataRowCollection objeto.Delete should not be called in a foreach loop while iterating through a DataRowCollection object. Delete modifica el estado de la colección.Delete modifies the state of the collection.

Puede anular una fila eliminada invocando RejectChanges.A deleted row can be undeleted by invoking RejectChanges.

Nota

El BeginEdit suspende temporalmente el método RowChanging eventos, pero la operación de eliminación no es así.The BeginEdit method temporarily suspends RowChanging events, but the delete operation does not.

Se aplica a

Consulte también: