I am uploading multiple files through a form and then iterating through each file and am creating a zero byte temp file and getting the file name using the GetTempFileName. Is there a way to copy the file itself not just the file name and the zero byte?. The code runs but i always get the zero byte file on the other end of my API which should happen. My code is like below.

public async Task<IActionResult> UploadDocumentsAsync(Documents files)
    {
        try
        {
            List<string> tempFilePath = new List<string>();
            List<string> fileName = new List<string>();

            foreach (var doc in files.documents)
            {
                tempFilePath.Add(Path.GetTempFileName());
                fileName.Add(doc.FileName);

            }

            MultipartFormDataContent formData = new MultipartFormDataContent();
            var filePath = tempFilePath;

            string token = Token();
            List<FileStream> streams = new List<FileStream>();

            using (var client = new HttpClient())
            {
                using (var content = new MultipartFormDataContent())
                {

                    for (int i = 0; i < tempFilePath.Count; i  )
                    {

                        var fileStream = new FileStream(tempFilePath[i], FileMode.Open);
                        formData.Add(new StreamContent(fileStream), fileName[i], fileName[i]);
                        streams.Add(fileStream);
                    }


                    var request = new HttpRequestMessage(HttpMethod.Post, new Uri(_configuration["Application:AppDomain"])   "api/Document")
                    {
                        Content = formData
                    };

                    request.Headers.Add("accept", "application/json");

                    var response = await client.SendAsync(request);
                    streams.ForEach(stream =>
                    {
                        stream.Dispose();
                    });

                    if (response.IsSuccessStatusCode)
                    {
                        //Handle success
                    }
                    //Handle failure

                }
            }
        }
        catch (Exception e)
        {
            //Handle the exception
        }


    }

CodePudding user response：

You need to save the actual file to temp fileName if you want to access it later

public async Task<IActionResult> UploadDocumentsAsync(Documents files)
{
    try
    {
        List<string> tempFilePath = new List<string>();
        List<string> fileName = new List<string>();

        foreach (var doc in files.documents)
        {
            string fileTempFileName = Path.GetTempFileName();
            tempFilePath.Add(fileTempFileName );
            fileName.Add(doc.FileName);
            using(Stream outStream = File.OpenWrite(Path.Combine(Path.GetTempPath(), fileTempFilePath )))
            {
                doc.CopyTo(outStream);

            }

        }

        //Continue your code [...]
    }
    catch (Exception e)
    {
        //Handle the exception
    }


}