DataSet.Clear DataSet.Clear DataSet.Clear DataSet.Clear Method

Définition

Efface toutes les données de DataSet en supprimant toutes les lignes de l'ensemble des tables.Clears the DataSet of any data by removing all rows in all tables.

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

Exemples

L’exemple suivant efface le DataSet de toutes les lignes de toutes les tables.The following example clears the DataSet of all rows in all tables.

private void ClearDataSet(DataSet dataSet)
{
    // To test, print the number rows in each table.
    foreach(DataTable table in dataSet.Tables)
    {
        Console.WriteLine(table.TableName + "Rows.Count = " 
            + table.Rows.Count.ToString());
    }
    // Clear all rows of each table.
    dataSet.Clear();

    // Print the number of rows again.
    foreach(DataTable table in dataSet.Tables)
    {
        Console.WriteLine(table.TableName + "Rows.Count = "  
            + table.Rows.Count.ToString());
    }
}
Private Sub ClearDataSet(ByVal dataSet As DataSet)
    ' To test, print the number rows in each table.
    Dim table As DataTable
    For Each table In dataSet.Tables
        Console.WriteLine(table.TableName & "Rows.Count = " _
            & table.Rows.Count.ToString())
    Next

    ' Clear all rows of each table.
    dataSet.Clear()

    ' Print the number of rows again.
    For Each table In dataSet.Tables
        Console.WriteLine(table.TableName & "Rows.Count = " _
            & table.Rows.Count.ToString())
    Next 
End Sub

Remarques

Si le DataSet est lié à un XmlDataDocument, l’appel DataSet.Clear ou DataTable.Clear déclenche le NotSupportedException.If the DataSet is bound to an XmlDataDocument, calling DataSet.Clear or DataTable.Clear raises the NotSupportedException. Pour éviter cette situation, parcourez chaque table et supprimez les lignes une à la fois.To avoid this situation, traverse each table, removing each row one at a time.

S’applique à

Voir aussi