DataSet.Clear Método

public:
 void Clear();

public void Clear ();

member this.Clear : unit -> unit

Public Sub Clear ()

O exemplo a seguir limpa o DataSet de todas as linhas em todas as tabelas.

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

Se o DataSet estiver associado a um XmlDataDocument, chamar DataSet.Clear ou DataTable.Clear gerará o NotSupportedException. Para evitar essa situação, percorra cada tabela, removendo cada linha uma de cada vez.

• Usando Conjuntos de Dados no ADO.NET