DataSet.OnRemoveTable(DataTable) DataSet.OnRemoveTable(DataTable) DataSet.OnRemoveTable(DataTable) DataSet.OnRemoveTable(DataTable) Method

Définition

Se produit lorsqu'un DataTable est supprimé de DataSet.Occurs when a DataTable is removed from a DataSet.

protected public:
 virtual void OnRemoveTable(System::Data::DataTable ^ table);
protected internal virtual void OnRemoveTable (System.Data.DataTable table);
abstract member OnRemoveTable : System.Data.DataTable -> unit
override this.OnRemoveTable : System.Data.DataTable -> unit
Protected Friend Overridable Sub OnRemoveTable (table As DataTable)

Paramètres

table
DataTable DataTable DataTable DataTable

DataTable en cours de suppression.The DataTable being removed.

Exemples

L’exemple suivant montre une classe dérivée de la DataSet avec la OnRemoveTable méthode substituée.The following example shows a class derived from the DataSet with the OnRemoveTable method overridden.


public static void DemonstrateOnRemoveTable()
{
    DerivedDataSet dataSet = CreateDataSet();
    if(dataSet.Tables.Count > 0)
        dataSet.Tables.RemoveAt(0);
}

public class DerivedDataSet: DataSet
{
    protected override void OnRemoveTable(DataTable table)
    {
        Console.WriteLine(
            "The '{0}' DataTable has been removed from the DataSet", 
            table.TableName);
    }
}

public static DerivedDataSet CreateDataSet()
{
    // Create a DataSet with one table containing two columns.
    DerivedDataSet derived = new DerivedDataSet();

    // Add table to DataSet.
    DataTable table = derived.Tables.Add("Items");

    // Add two columns.
    DataColumn column = table.Columns.Add("id", typeof(int));
    column.AutoIncrement = true;
    table.Columns.Add("item", typeof(int));

    // Set primary key.
    table.PrimaryKey = new DataColumn[] {table.Columns["id"]};

    return derived;
}

Public Shared Sub DemonstrateOnRemoveTable()
	Dim dataSet As DerivedDataSet = CreateDataSet()
	If dataSet.Tables.Count > 0 Then dataSet.Tables.RemoveAt(0)
End Sub

Public Class DerivedDataSet
	Inherits DataSet
	Protected Overrides Sub OnRemoveTable(table As DataTable)
		Console.WriteLine( _
            "The '{0}' DataTable has been removed from the DataSet", _
			table.TableName)
	End Sub
End Class

Public Shared Function CreateDataSet() As DerivedDataSet
	' Create a DataSet with one table containing two columns.
	Dim derived As DerivedDataSet = New DerivedDataSet()

	' Add table to DataSet.
	Dim table As DataTable = derived.Tables.Add("Items")

	' Add two columns.
	Dim column As DataColumn = table.Columns.Add("id", _
        Type.GetType("System.Int32"))
	column.AutoIncrement = True
	table.Columns.Add("item", Type.GetType("System.Int32"))

	' Set primary key.
	table.PrimaryKey = New DataColumn() {table.Columns("id")}

	return derived
End Function

Remarques

Cette méthode peut être substituée par les sous-classes pour restreindre les tables d’être supprimé.This method can be overridden by subclasses to restrict tables from being removed.

S’applique à

Voir aussi