Aysnc method - request is not available in this context error

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C#

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.NET4

Hi All,

I'm experiencing an error in my code that i'm struggling to find a solution to.

I have an internal web application that needs to move some files around on our internal network. The files in question are numerous and fairly large, approx 1000 - 3000 files that are all in the range of 30Mb each.

As I do not want to block the UI thread I wish to perform this operation asynchronously.

The problem I am having is that I receive the error "request is not available in this context" when performing any file/folder operations after calling the begin invoke method. The method works perfectly well when not being called by begin invoke, i.e. not asynchronously.

So, for example, I have to check that the directory I am moving the files into is actually there and if not I will create it. The code to get / create the directory is as follows:

DirectoryInfo importDirectory = new DirectoryInfo(required folder path);

if (!backupLocation.Exists)
{
   try
   {
        ....try to create directory
   }
   catch (Exception Ex)
   {
        return Ex error details;
   }
}

The code is running in .net 4 and hosted in IIS7. Running this code asynchronously throws the error I mention on the first line, i.e.

DirectoryInfo importDirectory = new DirectoryInfo(required folder path);.

Can anyone give me any ideas of what I need to do?

Thanks

Kev