public virtual string GetFileHash(string virtualPath, IEnumerable virtualPathDependencies)
{
if (prev != null)
{
return(prev.GetFileHash(virtualPath, virtualPathDependencies));
}
return(null);
}
/*
* Asks the provider for a hash string based on the state of a set of virtual paths.
* The primary virtualPath is also passed in by itself.
* If they match, the cached data held by the user of the provider is still
* valid. Otherwise, it should be discarded, and a new version needs to be
* obtained via GetFile/GetDirectory.
*/
public virtual string GetFileHash(string virtualPath, IEnumerable virtualPathDependencies)
{
// Delegate to the previous VirtualPathProvider, if any
if (_previous == null)
{
return(null);
}
return(_previous.GetFileHash(virtualPath, virtualPathDependencies));
}