ControlCachePolicy.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / UI / ControlCachePolicy.cs / 1 / ControlCachePolicy.cs
                        

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

namespace System.Web.UI { 
 
using System;
using System.IO; 
using System.Text;
using System.Collections;
using System.Collections.Specialized;
using System.ComponentModel; 
using System.ComponentModel.Design;
using System.Globalization; 
using System.Web; 
using System.Web.Util;
using System.Web.UI.WebControls; 
using System.Web.Caching;
using System.Security.Permissions;

 
[AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)]
public sealed class ControlCachePolicy { 
 
    private static ControlCachePolicy _cachePolicyStub = new ControlCachePolicy();
 
    private BasePartialCachingControl _pcc;

    internal ControlCachePolicy() {
    } 

    internal ControlCachePolicy(BasePartialCachingControl pcc) { 
        _pcc = pcc; 
    }
 
    internal static ControlCachePolicy GetCachePolicyStub() {
        // Return a stub, which returns SupportsCaching==false and throws on everything else.
        return _cachePolicyStub;
    } 

    // Check whether it is valid to access properties on this object 
    private void CheckValidCallingContext() { 

        // If it's not being cached, the CachePolicy can't be used 
        if (_pcc == null) {
            throw new HttpException(
                SR.GetString(SR.UC_not_cached));
        } 

        // Make sure it's not being used too late 
        if (_pcc.ControlState >= ControlState.PreRendered) { 
            throw new HttpException(
                SR.GetString(SR.UCCachePolicy_unavailable)); 
        }
    }

 
    public bool SupportsCaching {
        get { 
            // Caching is supported if we have a PartialCachingControl 
            return (_pcc != null);
        } 
    }


    public bool Cached { 
        get {
            CheckValidCallingContext(); 
 
            return !_pcc._cachingDisabled;
        } 

        set {
            CheckValidCallingContext();
 
            _pcc._cachingDisabled = !value;
        } 
    } 

 
    public TimeSpan Duration {
        get {
            CheckValidCallingContext();
 
            return _pcc.Duration;
        } 
 
        set {
            CheckValidCallingContext(); 

            _pcc.Duration = value;
        }
    } 

 
    public HttpCacheVaryByParams VaryByParams { 
        get {
            CheckValidCallingContext(); 

            return _pcc.VaryByParams;
        }
    } 

 
    public string VaryByControl { 
        get {
            CheckValidCallingContext(); 

            return _pcc.VaryByControl;
        }
 
        set {
            CheckValidCallingContext(); 
 
            _pcc.VaryByControl = value;
        } 
    }


    public CacheDependency Dependency { 
        get {
            CheckValidCallingContext(); 
 
            return _pcc.Dependency;
        } 

        set {
            CheckValidCallingContext();
 
            _pcc.Dependency = value;
        } 
    } 

 
    public void SetVaryByCustom(string varyByCustom) {
        CheckValidCallingContext();

        _pcc._varyByCustom = varyByCustom; 
    }
 
 
    public void SetSlidingExpiration(bool useSlidingExpiration) {
        CheckValidCallingContext(); 

        _pcc._useSlidingExpiration = useSlidingExpiration;
    }
 

    public void SetExpires(DateTime expirationTime) { 
        CheckValidCallingContext(); 

        _pcc._utcExpirationTime = DateTimeUtil.ConvertToUniversalTime(expirationTime); 
    }
}

}

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