65 lines
2.7 KiB
C#
65 lines
2.7 KiB
C#
//------------------------------------------------------------------------------
|
|
// <copyright file="SqlDataSourceCache.cs" company="Microsoft">
|
|
// Copyright (c) Microsoft Corporation. All rights reserved.
|
|
// </copyright>
|
|
//------------------------------------------------------------------------------
|
|
namespace System.Web.UI {
|
|
|
|
using System.Collections;
|
|
using System.ComponentModel;
|
|
using System.Web.Caching;
|
|
|
|
|
|
internal sealed class SqlDataSourceCache : DataSourceCache {
|
|
|
|
internal const string Sql9CacheDependencyDirective = "CommandNotification";
|
|
|
|
|
|
/// <devdoc>
|
|
/// A semi-colon delimited string indicating which databases to use for the dependency in the format "database1:table1;database2:table2".
|
|
/// </devdoc>
|
|
public string SqlCacheDependency {
|
|
get {
|
|
object o = ViewState["SqlCacheDependency"];
|
|
if (o != null)
|
|
return (string)o;
|
|
return String.Empty;
|
|
}
|
|
set {
|
|
ViewState["SqlCacheDependency"] = value;
|
|
}
|
|
}
|
|
|
|
|
|
#if !FEATURE_PAL // FEATURE_PAL does not fully enable SQL dependencies
|
|
/// <devdoc>
|
|
/// Saves data to the ASP.NET cache using the specified key.
|
|
/// </devdoc>
|
|
protected override void SaveDataToCacheInternal(string key, object data, CacheDependency dependency) {
|
|
string sqlCacheDependency = SqlCacheDependency;
|
|
// Here we only create cache dependencies for SQL Server 2000 and
|
|
// earlier that use a polling based mechanism. For SQL Server 2005
|
|
// and after, the data source itself creates the SqlCacheDependency
|
|
// and passes it in as a parameter.
|
|
if (sqlCacheDependency.Length > 0 && !String.Equals(sqlCacheDependency, Sql9CacheDependencyDirective, StringComparison.OrdinalIgnoreCase)) {
|
|
// Call internal helper method to parse the dependency list
|
|
CacheDependency sqlDependency = System.Web.Caching.SqlCacheDependency.CreateOutputCacheDependency(sqlCacheDependency);
|
|
|
|
if (dependency != null) {
|
|
// There was another dependency passed in, aggregate them
|
|
AggregateCacheDependency aggregateDependency = new AggregateCacheDependency();
|
|
aggregateDependency.Add(sqlDependency, dependency);
|
|
dependency = aggregateDependency;
|
|
}
|
|
else {
|
|
// No other dependencies, just the SQL one
|
|
dependency = sqlDependency;
|
|
}
|
|
}
|
|
base.SaveDataToCacheInternal(key, data, dependency);
|
|
}
|
|
#endif // !FEATURE_PAL
|
|
}
|
|
}
|
|
|