calling url with its credentials and want to pass the file

Hi Sir,

I want to call an post method api in the .net service and api has username and password, and also i want to send the file to that api it gives the json data as response.

api is:http://192.168.60.22:8023/mdrf/category/getSheetData

how to pass credentials and file to that api to get the result.

I tried like this but it show an error.

public JsonResult callingurl ()

{

string file = @"E:\maharashtra.xls";

string url = "http://192.168.60.22:8023/mdrf/category/getSheetData";

using (var client = new WebClient { UseDefaultCredentials = true })

{

client.Headers.Add(HttpRequestHeader.ContentType, "application/json; charset=utf-8");

byte[] result = client.UploadFile(url, file);

responseAsString = Encoding.Default.GetString(result);

}

error:The remote server returned an error: (401) Unauthorized.