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//------------------------------------------------------------------------------
// <copyright file="FileDataSourceCache.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
namespace System.Web.UI {
using System.Collections.Specialized;
using System.Web.Caching;
internal sealed class FileDataSourceCache : DataSourceCache {
private StringCollection _fileDependencies;
/// <devdoc>
/// Sets the list of files that the cache entry will be dependent on.
/// These values are not stored in view state.
/// </devdoc>
public StringCollection FileDependencies {
get {
if (_fileDependencies == null) {
_fileDependencies = new StringCollection();
}
return _fileDependencies;
}
}
/// <devdoc>
/// Saves data to the ASP.NET cache using the specified key.
/// </devdoc>
protected override void SaveDataToCacheInternal(string key, object data, CacheDependency dependency) {
int fileCount = FileDependencies.Count;
string[] filenames = new string[fileCount];
FileDependencies.CopyTo(filenames, 0);
CacheDependency fileDependency = new CacheDependency(0, filenames);
if (dependency != null) {
// There was another dependency passed in, aggregate them
AggregateCacheDependency aggregateDependency = new AggregateCacheDependency();
aggregateDependency.Add(fileDependency, dependency);
dependency = aggregateDependency;
}
else {
// No other dependencies, just the file one
dependency = fileDependency;
}
base.SaveDataToCacheInternal(key, data, dependency);
}
}
}
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