Silverlight Error Loading dll at Runtime

Question

I've got a silverlight application that loads a dll file located within the ClientBin folder at run time via a relative Uri. It works great on my local machine, but when deployed on a server here, it seems to constantly fail while trying to load the file:

private void OnAssemblyOpened(object sender, OpenReadCompletedEventArgs e)
{  
    AssemblyPart asmbPart = new AssemblyPart();

    MessageBox.Show(e.ToString());
    Assembly asmb = asmbPart.Load(e.Result) // this line causes the exception
    ...
}

Of course silverlight doesn't give me a useful error - just the usual NotFound nonsense. Is there a step I've missed in deploying this? Permissions or something? The dll file is definitely in the ClientBin folder btw - I've checked that! :)

AnthonyWJones AnthonyWJones · Accepted Answer · 2011-01-25T15:37:33

Another option would be to compress the dll into a zip file, then download the zip file. That way you need not play with the server config.

How to download and unpack a file from a Zip file is given in this answer.

Code in essence would look like this:-

AssemblyPart asmbPart = new AssemblyPart();

var zipRes = new StreamResourceInfo(args.Result, null)
var assemRes = Application.GetResourceStream(zipRes, new Uri("YourAssembly.dll", UriKind.Relative));

Assembly asmb = asmbPart.Load(assemRes.Stream)

Silverlight Error Loading dll at Runtime

4 Answers