'An exception occurred during a WebClient request" while using C# ASP.NET

Question

So, I have built an auto update program to my program.

The code that is running in here is:

new WebClient().DownloadFile("XXXX", checkingfolder.SelectedPath); 

the XXX is my webserver that is running as a VPS server in verio, with the newest IIS and everything.

When the user clicks on the download button, it says:

'An exception occurred during a WebClient request. 

The thing is, that I dont even know why - i am just doing try catch.

Anyone here have any idea why this happened?

Thanks for any help you will give me, you have no idea how much you are helping me here - thanks again !

Answer 1

I can reproduce this if I specify, as seems to be the case in your example, a folder name rather than a file name the destination. Supply a file name instead.

As an aside; if I look at the InnerException, it tells me that the problem relates to the file path:

using(var client = new WebClient()) {     try     {         client.DownloadFile(             "http://stackoverflow.com/questions/8033619/an-exception-occurred-durning-a-webclient-request-c-sharp-asp-net/8033687#8033687",             @"j:\MyPath");     }     catch (Exception ex)     {         while (ex != null)         {             Console.WriteLine(ex.Message);             ex = ex.InnerException;         }     } } 

Which gives:

An exception occurred during a WebClient request. Access to the path 'j:\MyPath' is denied. 

If I change it to a file, it works fine:

client.DownloadFile(     "http://stackoverflow.com/questions/8033619/an-exception-occurred-durning-a-webclient-request-c-sharp-asp-net/8033687#8033687",     @"j:\MyPath\a.html"); 

Answer 2

Sometimes this error can occur when another class or process is accessing the file you've just downloaded