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DataTableCollection.CollectionChanged Event

Occurs after the DataTableCollection is changed because of DataTable objects being added or removed.

Namespace:  System.Data
Assembly:  System.Data (in System.Data.dll)

public event CollectionChangeEventHandler CollectionChanged

For more information about handling events, see Consuming Events.

The following example demonstrates how to use the CollectionChanged event.

public static void TableCollectionCollectionChanged()
{
    // create a DataSet with two tables
    DataSet dataSet = new DataSet();

    dataSet.Tables.CollectionChanged +=
        new System.ComponentModel.CollectionChangeEventHandler(
        Collection_Changed);

    // create Customer table
    DataTable custTable = new DataTable("Customers");
    custTable.Columns.Add("customerId",
        typeof(int)).AutoIncrement = true;
    custTable.Columns.Add("name",
        typeof(string));
    custTable.PrimaryKey = new DataColumn[] { custTable.Columns["customerId"] };

    // create Orders table
    DataTable orderTable = new DataTable("Orders");
    orderTable.Columns.Add("orderId",
        typeof(int)).AutoIncrement = true;
    orderTable.Columns.Add("customerId", typeof(int));
    orderTable.Columns.Add("amount", typeof(double));
    orderTable.PrimaryKey = new DataColumn[] { orderTable.Columns["orderId"] };

    dataSet.Tables.AddRange(new DataTable[] { custTable, orderTable });

    // remove all tables 
    // check if table can be removed and then 
    // remove it, cannot use a foreach when 
    // removing items from a collection 
    // equivalent to dataSet.Tables.Clear() 
    while (dataSet.Tables.Count > 0)
    {
        DataTable table = dataSet.Tables[0];
        if (dataSet.Tables.CanRemove(table))
        {
            dataSet.Tables.RemoveAt(0);
        }
    }

    Console.WriteLine("dataSet has {0} tables",
        dataSet.Tables.Count);
}

private static void Collection_Changed(object sender,
    System.ComponentModel.CollectionChangeEventArgs e)
{
    Console.WriteLine("Collection_Changed Event: '{0}'\table element={1}",
        e.Action.ToString(), e.Element.ToString());
}

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0
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