Uploading an image using C# and WebRequest?

Question

Here is the working code in Python (using cURL):

#!/usr/bin/python

import pycurl

c = pycurl.Curl()
values = [
          (\"key\", \"YOUR_API_KEY\"),
               


        

Answer 1

Try this:

string file = @"C:\Users\Sergio\documents\visual studio 2010\Projects\WpfApplication1\WpfApplication1\Test\Avatar.png";
string parameters = @"key=1df918979bf3f8dff2125c22834210903&image=" +
    Convert.ToBase64String(File.ReadAllBytes(file));

Answer 2

Read image posted by in API

public IHttpActionResult UpdatePhysicianImage(HttpRequestMessage request)
    {
        try
        {
            var form = HttpContext.Current.Request.Form;
            var model = JsonConvert.DeserializeObject<UserPic>(form["json"].ToString());
            bool istoken = _appdevice.GettokenID(model.DeviceId);
            if (!istoken)
            {
                statuscode = 0;
                message = ErrorMessage.TockenNotvalid;
                goto invalidtoken;
            }
            HttpResponseMessage result = null;
            var httpRequest = HttpContext.Current.Request;
            if (httpRequest.Files.Count > 0)
            {
                var docfiles = new List<string>();
                foreach (string file in httpRequest.Files)
                {
                    var postedFile = httpRequest.Files[file];
                    // var filePath = uploadPath + postedFile.FileName;
                    //  string fileUrl = Utility.AbsolutePath("~/Data/User/" + model.UserId.ToString());
                    string fileUrl = Utility.AbsolutePath("~/" + Utility.UserDataFolder(model.UserId, "Document"));
                    if (!Directory.Exists(fileUrl))
                    {
                        Directory.CreateDirectory(fileUrl);
                        Directory.CreateDirectory(fileUrl + "\\" + "Document");
                        Directory.CreateDirectory(fileUrl + "\\" + "License");
                        Directory.CreateDirectory(fileUrl + "\\" + "Profile");
                    }
                    string imageUrl = postedFile.FileName;
                    string naviPath = Utility.ProfileImagePath(model.UserId, imageUrl);
                    var path = Utility.AbsolutePath("~/" + naviPath);
                    postedFile.SaveAs(path);
                    docfiles.Add(path);
                    if (model.RoleId == 2)
                    {
                        var doctorEntity = _doctorProfile.GetNameVideoChat(model.UserId);
                        doctorEntity.ProfileImagePath = naviPath;
                        _doctorProfile.UpdateDoctorUpdProfile(doctorEntity);
                    }
                    else
                    {
                        var patientEntity = _PatientProfile.GetPatientByUserProfileId(model.UserId);
                        patientEntity.TumbImagePath = naviPath;
                        _PatientProfile.UpdatePatient(patientEntity);
                    }
                }
                result = Request.CreateResponse(HttpStatusCode.Created, docfiles);
            }
            else
            {
                result = Request.CreateResponse(HttpStatusCode.BadRequest);
            }
        }
        catch (Exception e)
        {
            statuscode = 0;
            message = "Error" + e.Message;
        }
    invalidtoken:
        return Json(modeldata.GetData(statuscode, message));
    }

Answer 3

Try changing :-

"application/x-www-form-urlencoded"

to

"multipart/form-data"

Answer 4

Shot in the dark, but maybe create an instance of Image, save the file to a Stream and use that to read the bytes into an array then upload it.

As in:

Image i = System.Drawing.Image.FromFile("wut.jpg");
Stream stm = new Stream();
System.Drawing.Imaging.Encoder myEncoder = System.Drawing.Imaging.Encoder.Quality;
System.Drawing.Imaging.EncoderParameters paramz = new System.Drawing.Imaging.EncoderParameters(1);
myEncoderParameter = new EncoderParameter(myEncoder, 100L);
paramz.Param[0] = myEncoderParameter;
i.Save(stm, System.Drawing.Imaging.ImageFormat.Jpeg, paramz);
/* I'm lazy: code for reading Stream into byte[] here */

Answer 5

You should correctly form a multipart POST request. See an example here: Upload files with HTTPWebrequest (multipart/form-data)

Answer 6

Try adding the content-type for the jpg into your multipart boundary.

See this uRL for examples (at the end)

http://www.w3.org/TR/html401/interact/forms.html#h-17.13.4.2