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ImageMapEventArgs Class

Provides data for the Click event of an ImageMap control.

System.Object
  System.EventArgs
    System.Web.UI.WebControls.ImageMapEventArgs

Namespace:  System.Web.UI.WebControls
Assembly:  System.Web (in System.Web.dll)

type ImageMapEventArgs =  
    class 
        inherit EventArgs 
    end

The ImageMapEventArgs type exposes the following members.

  NameDescription
Public methodImageMapEventArgsInitializes a new instance of the ImageMapEventArgs class.
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  NameDescription
Public propertyPostBackValueGets the String assigned to the PostBackValue property of the HotSpot object that was clicked.
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  NameDescription
Public methodEquals(Object)Determines whether the specified object is equal to the current object. (Inherited from Object.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetHashCodeServes as the default hash function. (Inherited from Object.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
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The Click event is raised when a HotSpot object in an ImageMap control is clicked. To allow a HotSpot object to raise the Click event, you must first set either the ImageMap.HotSpotMode property or the HotSpot.HotSpotMode property to HotSpotMode.PostBack. To control the actions programmatically that are performed when a postback HotSpot is clicked, provide an event handler for the Click event.

A PostBackValue property stores a string that is associated with the behavior of the HotSpot object when clicked. This string is passed in the ImageMapEventArgs event data when the HotSpot is 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 VoteMap_Clicked 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.

No code example is currently available or this language may not be supported.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
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