webclient用于向服务器发出请求但返回ERROR

Question

Using a WebClient to make a request to the server.

WebClient web = new WebClient();
string xmlString = web.DownloadString(partialUrl);

The partialUrl returns a valid URL, which if I use in a browser returns the correct XML list, but if ran from debug mode in Visual Studio it throws the error:

{System.Net.WebException: An exception occurred during a WebClient request. ---> System.NotSupportedException: The URI prefix is not recognized.
   at System.Net.WebRequest.Create(Uri requestUri, Boolean useUriBase)
   at System.Net.WebRequest.Create(Uri requestUri)
   at System.Net.WebClient.GetWebRequest(Uri address)
   at System.Net.WebClient.DownloadDataInternal(Uri address, WebRequest& request)
   --- End of inner exception stack trace ---
   at System.Net.WebClient.DownloadDataInternal(Uri address, WebRequest& request)
   at System.Net.WebClient.DownloadString(Uri address)
   at System.Net.WebClient.DownloadString(String address)
   at Synchroniser.XML.GalwayPortal.Download_POS(String partialUrl, IInterpreter interpreter)

Answer 1

From Your Error It seems that you are creating a web request with wrong url.

Please make sure that in web.DownloadString(partialUrl); url string must start with proper protocol like (http,https etc.)