Problem encoding/decoding image

  • Thread starter Thread starter Slade
  • Start date Start date
S

Slade

Hi,

I'm trying to use POST an image to a web page with WebRequest/WebResponse.
Only problem is that I must be making an error somewhere in the
encoding/decoding process. I've pasted below a bit of sample code that
basically shows how I am encoding and then decoding the binary image. Many
thanks if you can point out what I am doing wrong... thanks, Slade Smith


Image bmp =context.GetImage();
Stream stream=new MemoryStream();

//save image as a jpg file. "test.jpg" will open fine when I try it....
bmp.Save("c:\\temp\\test.jpg",System.Drawing.Imaging.ImageFormat.Jpeg);
bmp.Save(stream,System.Drawing.Imaging.ImageFormat.Jpeg);

//encode the image to prepare it for a transfer via a POST
int imgLen = (int)stream.Length;
byte[] imgBinaryData = new byte[imgLen];
int n = stream.Read(imgBinaryData,0,imgLen);
string s = Convert.ToBase64String(imgBinaryData);

//I will be uploading the file here, and the code after this
//will be running on the server...

//trying just to reverse the encoding process and save the file,
//but something has gone horribly wrong, and none of my imaging
//programs will open "test2.jpg" when I try it. Must be corrupted.
imgBinaryData=Convert.FromBase64String(s);
Stream f=File.Create("c:\\temp\\test2.jpg");
imgLen = imgBinaryData.Length;
f.Write(imgBinaryData,0,imgLen);
f.Close();
 
Back
Top