First post…..
I am trying to upload data to a web site using C# and HttpClient.
The site responds when I use curl: curl -X POST https://www.eQSL.cc/qslcard/ImportADIF.cfm -F “Filename=@”D:DocumentsSourceCodeRadiobinDebugnet8.0-windowslogfile.adi”

etc…..

My C# code returns a status code “OK”, but the response is an empty string.

`using System.IO;
using System.Net.Http;
using System.Threading.Tasks;

//https://www.eqsl.cc/QSLcard/ImportADIF.txt HOW TO USE THE “ImportADIF.cfm” PROGRAM for eQSL.cc
//https://www.eqsl.cc/QSLCard/ADIFContentSpecs.cfm

namespace ConsoleApp2
{
internal class Program
{
static void Main(string[] args)
{
HttpClient client = new HttpClient();
string response = UploadLog(client).Result;
}

    /*
     curl -v POST https://www.eQSL.cc/qslcard/ImportADIF.cfm -F "Filename=@"D:DocumentsSourceCodeRadiobinDebugnet8.0-windowslogfile.adi"
    returns a Web response
    */
    private static async Task<string>  UploadLog(HttpClient client)
    {
        string url = @"https://www.eQSL.cc/qslcard/ImportADIF.cfm";
        string filePath = @"D:DocumentsSourceCodeRadiobinDebugnet8.0-windowslogfile.adi";

        byte[] bytes = System.IO.File.ReadAllBytes(filePath);

        MultipartFormDataContent formContent = new MultipartFormDataContent();
        FileStream fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read);
        StreamContent fileContent = new StreamContent(fileStream);

        fileContent.Headers.ContentDisposition = new System.Net.Http.Headers.ContentDispositionHeaderValue("form-data")
        {
            Name = "Filename",
            FileName = System.IO.Path.GetFileName(filePath)
        };

        formContent.Add(fileContent);
        formContent.Add(new StringContent("myUserID"), "EQSL_USER");
        formContent.Add(new StringContent("myPass"), "EQSL_PSWD");

        var response = await client.PostAsync(url, formContent);
        response.EnsureSuccessStatusCode();
        return await response.Content.ReadAsStringAsync().ConfigureAwait(false);
    }

}

}
`