FileSystemWatcher or ASP.NET Cache for multiple files

Question

I'm working on an open source where I need to populate a dictionary from reading values from multiple xml files and whenever any of the xml file changes I have to update the dictionary. Since there are multiple files I thought of using FileSystemWatcher. Is this a good idea? or I've to go with ASP.NET cache with file dependency? I'm not sure how ASP.NET cache helps me in the case of multiple files.

Note: I've implemented a locking mechainsm while updating the dictionary so threading won't be an issue in the case of updating dictionary.

FileSystemWatcher is not easy to work with. Whenever I've tried to use it I've ended up using a timer to scan the directory for updated files instead. That is much more reliable. — Martin Liversage
– Martin Liversage, Commented Oct 12, 2012 at 11:40
@MartinLiversage Do you have idea how I can use ASP.NET cache with dependency on multiple files? — VJAI
– VJAI, Commented Oct 12, 2012 at 11:43
I think I've to use AggregateCacheDependency codeidol.com/csharp/csharpckbk2/Web/… — VJAI
– VJAI, Commented Oct 12, 2012 at 11:54
No, not really, that is why I only wrote a comment because I can't provide an answer to your question. — Martin Liversage
– Martin Liversage, Commented Oct 12, 2012 at 12:01

Erwin · Accepted Answer · 2012-10-12 12:00:51Z

2

For creating dependencies for multiple files you can use the AggregateCacheDependency like this:

CacheDependency[] depArray = new CacheDependency () 
{
  new CacheDependency(Server.MapPath("foo.txt")),
  new CacheDependency(Server.MapPath("bar.txt"))
};

AggregateCacheDependency aggDep = new AggregateCacheDependency();
aggDep.Add(depArray);

Cache.Insert("key", value, aggDep);

answered Oct 12, 2012 at 12:00

Erwin

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Erwin Over a year ago

On Cache.Insert there are two overloads for Item update and delete callback msdn.microsoft.com/en-us/library/…

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