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StateBag.Clear Method

Removes all items from the current StateBag object.

Namespace:  System.Web.UI
Assembly:  System.Web (in System.Web.dll)
public void Clear()

Implements

IDictionary.Clear()

The following code example demonstrates using the Clear method.

        // Implement the SaveViewState method. If the StateBag 
        // that stores the MyItem class's view state contains 
        // a value for the message property and if the value 
        // has changed since the TrackViewState method was last  
        // called, all view state for this class is deleted,  
        // using the StateBag.Clear method,and the new value is added. 
        object IStateManager.SaveViewState()
        {
            // Check whether the message property exists in  
            // the ViewState property, and if it does, check 
            // whether it has changed since the most recent 
            // TrackViewState method call. 
            if (!((IDictionary)_viewstate).Contains("message") || _viewstate.IsItemDirty("message"))
            {
                _viewstate.Clear();
                // Add the _message property to the StateBag.
                _viewstate.Add("message", _message);
            }
            return ((IStateManager)_viewstate).SaveViewState();
        }

.NET Framework

Supported in: 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

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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