ImageMapEventArgs::PostBackValue Property
Gets the String assigned to the PostBackValue property of the HotSpot object that was clicked.
Assembly: System.Web (in System.Web.dll)
Property Value
Type: System::StringThe String assigned to the PostBackValue property of the HotSpot object that was clicked.
Use this property to programmatically access the PostBackValue property of the HotSpot object in an ImageMap control that was clicked.
The following code example demonstrates how to create an event handler for the Click event. The ImageMap control contains two RectangleHotSpot objects. The ImageMap::HotSpotMode property is set to HotSpotMode.PostBack, which causes the page to post back to the server each time a user clicks one of the RectangleHotSpot objects. The Click event is handled by the VoteMap_Clicked event handler. The handler examines the PostBackValue property, sent in the ImageMapEventArgs data to determine which RectangleHotSpot object is associated with the event. For this example to work correctly, you must supply your own image for the ImageUrl property and update the path to the image appropriately so that the application can locate it.
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
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.