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HeaderCheckBoxChecked Property
Gets/sets auto postback options applied to HeaderCheckBoxClicked event. When this property is set to true, a postback will happen immediately and values changed on the server. When it is false, the values are changed on the client.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2