DataGrid::OnUpdateCommand Method
Raises the UpdateCommand event. This allows you to provide a custom handler for the event.
Assembly: System.Web (in System.Web.dll)
Parameters
- e
- Type: System.Web.UI.WebControls::DataGridCommandEventArgs
A DataGridCommandEventArgs that contains event data.
Use the OnUpdateCommand method to provide a custom handler for the UpdateCommand event.
The UpdateCommand event is raised when the Update button for an item is clicked.
A typical handler for the UpdateCommand event updates the data, sets the EditItemIndex property to -1 (to deselect the item), and then rebinds the data to the DataGrid control.
Caution |
|---|
Text is not HTML encoded before it is displayed in the DataGrid control. If the values for the control come from user input, be sure to validate the values to reduce security vulnerabilities. |
Raising an event invokes the event handler through a delegate. For more information, see Raising an Event.
The OnUpdateCommand method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.
Notes to InheritorsWhen overriding OnUpdateCommand in a derived class, be sure to call the base class's OnUpdateCommand method so that registered delegates receive the event.
The following code example demonstrates how to specify and code a handler for the UpdateCommand event to update the values of an item in the DataGrid control to new values specified by the user.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
Caution