ControlCachePolicy.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / Web / UI / ControlCachePolicy.cs / 1305376 / 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;

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); 
    }
 
    public String ProviderName {
        get {
            CheckValidCallingContext();
            if (_pcc._provider == null) { 
                return OutputCache.ASPNET_INTERNAL_PROVIDER_NAME;
            } 
            else { 
                return _pcc._provider;
            } 
        }
        set {
            CheckValidCallingContext();
            if (value == OutputCache.ASPNET_INTERNAL_PROVIDER_NAME) { 
                value = null;
            } 
            OutputCache.ThrowIfProviderNotFound(value); 
            _pcc._provider = value;
        } 
    }
}

} 


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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ControlCachePolicy.cs source code in C# .NET

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