HiddenFieldPageStatePersister.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / UI / HiddenFieldPageStatePersister.cs / 1 / HiddenFieldPageStatePersister.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Web.UI { 
    using System; 
    using System.Collections;
    using System.Collections.Specialized; 
    using System.IO;
    using System.Text;
    using System.Security.Permissions;
 
    [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)]
    [AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)] 
    public class HiddenFieldPageStatePersister : PageStatePersister { 
        public HiddenFieldPageStatePersister(Page page) : base (page) {
        } 

        public override void Load() {
            NameValueCollection requestValueCollection = Page.RequestValueCollection;
            if (requestValueCollection == null) { 
                return;
            } 
 
            string viewStateString = null;
            try { 
                viewStateString = Page.RequestViewStateString;

                // VSWhidbey 160556
                if (!String.IsNullOrEmpty(viewStateString)) { 
                    Pair combinedState = (Pair)Util.DeserializeWithAssert(StateFormatter, viewStateString);
                    ViewState = combinedState.First; 
                    ControlState = combinedState.Second; 
                }
            } 
            catch (Exception e) {
                // throw if this is a wrapped ViewStateException -- mac validation failed
                if (e.InnerException is ViewStateException) {
                    throw; 
                }
 
                ViewStateException.ThrowViewStateError(e, viewStateString); 
            }
        } 


        /// 
        ///     To be supplied. 
        /// 
        public override void Save() { 
            if (ViewState != null || ControlState != null) { 
                Page.ClientState = Util.SerializeWithAssert(StateFormatter, new Pair(ViewState, ControlState));
            } 
        }
    }
}

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