c# - Create serverfolder if filepath does not exist -

i have controller method handles file uploads jquery script. specify filepath following code path.combine(server.mappath("~/userfiles/"), qqfile); add parameter specifies subfolder file, can specify existing folders.

is there easy fix create subfolder on server if doesn't exist?

this controller method:

public actionresult fileupload(string qqfile) {     var file = string.empty;      try     {         var stream = request.inputstream;         if (string.isnullorempty(request["qqfile"]))         {             // ie             httppostedfilebase postedfile = request.files[0];             stream = postedfile.inputstream;             file = path.combine(server.mappath("~/userfiles/"), system.io.path.getfilename(request.files[0].filename));         }         else         {             //webkit, mozilla             file = path.combine(server.mappath("~/userfiles/"), qqfile);         }          var buffer = new byte[stream.length];         stream.read(buffer, 0, buffer.length);         system.io.file.writeallbytes(file, buffer);     }     catch (exception ex)     {         return json(new { success = false, message = ex.message }, "application/json");     }      return json(new { success = true }, "text/html"); } 

have tried this?

        string path = "~/userfiles/subfolder/";         if (!directory.exists(path))         {             directory.createdirectory(path);         }         //todo 

or should work

string folder= "subfolder"; var path= server.mappath("~/userfiles/" + folder); var directory = new directoryinfo(path); if (directory.exists == false) {     directory.create(); } //todo