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Page.RequiresControlState Method

Determines whether the specified Control object is registered to participate in control state management.

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

public bool RequiresControlState(
	Control control
)

Parameters

control
Type: System.Web.UI.Control
The Control to check for a control state requirement.

Return Value

Type: System.Boolean
true if the specified Control requires control state; otherwise, false

Control state is an object composed of critical view-state data that Web server controls need to function; it is contained in a separate object from normal view state.

Custom controls using control state must call the RegisterRequiresControlState method before saving control state. Use the RequiresControlState method to check for controls that are registered with the page as requiring control state.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

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.
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