Question

How can I use web server cache in a similar way as the following VB code does:

   ////  FindData() returns real data    //// FindCached() returns from cache (kept 20 minute)      Protected Function RegisterCachedData(ByVal id As String) As Integer         Dim onCacheRemove As CacheItemRemovedCallback         onCacheRemove = New CacheItemRemovedCallback(AddressOf Me.CheckCallback)         Cache.Insert('AverageData', FindData(1), Nothing, DateTime.Now.AddMinutes(20), TimeSpan.Zero, 1, onCacheRemove)     End Function      Sub CheckCallback(ByVal str As String, ByVal obj As Object, ByVal reason As CacheItemRemovedReason)         RegisterCachedData(0)     End Sub     Protected Function FindCached() As Integer         If Cache.Get('AverageData') Is Nothing Then RegisterCachedData(0)         Return Cache.Get('AverageData')     End Function 

Answer 1

The same way. This should do it:

protected int RegisterCachedData(string id) {    CacheItemRemovedCallback onCacheRemove;    onCacheRemove = new CacheItemRemovedCallback(CheckCallback);    Cache.Insert('AverageData', FindData(1), null, DateTime.Now.AddMinutes(20), TimeSpan.Zero, 1, onCacheRemove); }  void CheckCallback(string str, object obj, CacheItemRemovedReason reason) {    RegisterCachedData('0'); }  protected int FindCached() {    if (Cache.Get('AverageData') == null) RegisterCachedData('0');    return Cache.Get('AverageData'); }