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DataTable.RowChanging Event

Occurs when a DataRow is changing.

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

public event DataRowChangeEventHandler RowChanging
/** @event */
public void add_RowChanging (DataRowChangeEventHandler value)

/** @event */
public void remove_RowChanging (DataRowChangeEventHandler value)

JScript supports the use of events, but not the declaration of new ones.

For more information, see Working with DataTable Events.

private static void DataTableRowChanging()
{
	DataTable custTable = new DataTable("Customers");
	// add columns
	custTable.Columns.Add("id", typeof(int));
	custTable.Columns.Add("name", typeof(string));
	custTable.Columns.Add("address", typeof(string));

	// set PrimaryKey
	custTable.Columns[ "id" ].Unique = true;
	custTable.PrimaryKey = new DataColumn[] { custTable.Columns["id"] ;

	// add a RowChanging event handler for the table.
	custTable.RowChanging += new DataRowChangeEventHandler(Row_Changing);


	// add ten rows
	for(int id=1; id<=10; id++)
	{
		custTable.Rows.Add(
			new object[] { id, string.Format("customer{0", id), 
            string.Format("address{0", id) );
	
	
	custTable.AcceptChanges();

	// change the name column in all the rows
	foreach(DataRow row in custTable.Rows)
	{
		row["name"] = string.Format("vip{0", row["id"]);
	



private static void Row_Changing(object sender, DataRowChangeEventArgs e)
{
	Console.WriteLine("Row_Changing Event: name={0; action={1", 
		e.Row["name"], e.Action);


Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

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

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0
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