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HtmlInputImage.LoadPostData Method

Processes the postback data for the HtmlInputImage control.

Namespace:  System.Web.UI.HtmlControls
Assembly:  System.Web (in System.Web.dll)
protected virtual bool LoadPostData(
	string postDataKey,
	NameValueCollection postCollection


Type: System.String

The key identifier for the control.

Type: System.Collections.Specialized.NameValueCollection

The collection of all incoming name values.

Return Value

Type: System.Boolean
true if the HtmlInputImage control's state has changed as a result of the postback; otherwise, false.

The LoadPostData method checks to see whether coordinates that represent the location where the image was clicked by the user are part of the postback data for the HtmlInputImage control. If coordinates are part of the postback data, then the LoadPostData method registers the HtmlInputImage control with the Web page as a control that requires an event to be raised when it is processed.


The origin coordinates (0,0) are located in the upper-left corner of the image.

The LoadPostData method is used primarily by control developers extending the functionality of the HtmlInputImage control.

.NET Framework

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

Windows Phone 8.1, Windows Phone 8, 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.

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