Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/UI/ControlCachePolicy.cs

@@ -0,0 +1,177 @@
+//------------------------------------------------------------------------------
+// <copyright file="ControlCachePolicy.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+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;
+        }
+    }
+}
+
+}
+