c# The given path's format is not supported. UNC Path

Question

I am trying to access and download a bak file from a remote server and keep getting the error "The given path's format is not supported." The code I am using below:

string uncPath = Server.MapPath(Path.Combine(@"\\TSTSVR\Users\temp_databaseBackups_000kfkf000", 
  string.Format("{0}-{1}.bak", ddlDatabases.SelectedValue, DateTime.Now.ToString("yyyy-MM-dd"))));

//download
WebClient webClient = new WebClient();
webClient.DownloadFile(uncPath, ddlDatabases.SelectedValue + "-" + DateTime.Now.ToString("MM-dd-yyyy:hh:mm"));

I am getting the error at the DownloadFile line. Am I declaring the UNC path wrong? The folder is there on the server and I set access to Everyone with write permissions.

Answer 1

With the help of a few hints in the right direction from you all I solved the problem with the following code:

string uncPath = Path.Combine(@"\\TSTSVR\Users\temp_databaseBackups_000kfkf000",
  string.Format("{0}-{1}.bak", ddlDatabases.SelectedValue, DateTime.Now.ToString("yyyy-MM-dd")));

//download
Response.ContentType = "bak";
Response.AddHeader("Content-Disposition", "attachment;filename=\"" + ddlDatabases.SelectedValue + "-" + DateTime.Now.ToString("MM-dd-yyyy:hh:mm") + "\"");

Response.TransmitFile(uncPath);
Response.End();

The program will now download the file need from the remote server.

Answer 2

如果远程计算机在Windows控制下工作，则path中不允许冒号。