error resolving System.ArgumentException using wcf service

Question

I want to convert Image to Base64String format,For that I am using this code

string conversionData = imageToBase64("http//localhost/MyService/Images/myImage.png");

the code of "imageToBase64()" is

private string imageToBase64(string path)
{
  using(Image image = Image.FromFile(path))
  {
   using(MemoryStream m = new MemoryStream())
   {
    byte[] imageBytes = m.ToArray();
    string base64String = Convert.ToBase64String(imageBytes);
    return base64String;
   }
  }
 }

When I am passing path to this method I am getting the error "An exception of type 'System.ArgumentException' occered ...". thanks in advance

Answer 1

take a look :https://stackoverflow.com/questions/21325661/convert-image-path-to-base64-string.You missed image.Save(m, image.RawFormat) Hope it will help

Answer 2

The parameter of fromfile cannot be URI, otherwise an error will be reported.

The interface that accesses WCF will return stream. We need to use the Httpwebrequest request interface to receive its stream,then save it locally before using fromfile.Here is a Demo:

 HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://localhost:8000/Service/GetImage?width=50&height=40");
            request.Method = "GET";
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            if (File.Exists("d:\\name.png"))
                File.Delete("d:\\name.png");
            Stream outStream = System.IO.File.Create("d:\\name.png");
            Stream inStream = response.GetResponseStream();
            int l;
            byte[] buffer = new byte[1024];
            do
            {
                l = inStream.Read(buffer, 0, buffer.Length);
                if (l > 0)
                    outStream.Write(buffer, 0, l);
            }
            while (l > 0);
            outStream.Close();
            inStream.Close();

           Image image = Image.FromFile("d:\\name.png");