upload image to Database by using WCF Restful service - iphone

Question

I am using WCF restful service to upload image to my databse
Code:
[OperationContract]
[WebInvoke(Method = "POST", UriTemplate = "AddDealImage/{id}")]
long AddDealImage(string id, Stream image);
public long AddDealImage(string id, Stream image)
{
//add convert Stram to byte[]
byte[] buffer = UploadFile.StreamToByte(image);
//create image record for database
Img img = ImgService.NewImage(DateTime.Now.ToFileTime().ToString(), "", buffer, "image/png");
ImgService.AddImage(img);
//return image id
return img.ImageId;
}
public static byte[] StreamToByte(Stream stream)
{
byte[] buffer = new byte[16 * 1024];
using (MemoryStream ms = new MemoryStream())
{
int read;
while ((read = stream.Read(buffer, 0, buffer.Length)) > 0)
{
ms.Write(buffer, 0, read);
}
return ms.ToArray();
}
}
Problem:
When i upload my photo via iPhone the POST was Successful. New image id is returned, and I can see the new record created in the database.
However when I try to convert binary from DB record to Image Stream: I got error:
"No imaging component suitable to complete this operation was found."
it seems that the MemoryStream is corrupted.
//photoBytes from database
MemoryStream photoStream = new MemoryStream(photoBytes)
//Error happened here
var photoDecoder = BitmapDecoder.Create(
photoStream,
BitmapCreateOptions.PreservePixelFormat,
BitmapCacheOption.None);
Plus, the error only happens when image is uploaded via WCF Restful service.
It works perfectly if the image is uploaded via web form.
Question:
Where did i do wrong or missed?
how can i write a test client to test this upload api?
many thanks

Answer 1

the code above actually works.
the part I missed is the transferModel you need to set it to "Streamed" in web.config
Code for testing:
static void Main()
{
string filePath = #"C:\Users\Dizzy\Desktop\600.png";
string url = "http://localhost:13228/ApiRestful.svc/AddDealImage/96";
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.Accept = "text/xml";
request.Method = "POST";
using (Stream fileStream = File.OpenRead(filePath))
using (Stream requestStream = request.GetRequestStream())
{
int bufferSize = 1024;
byte[] buffer = new byte[bufferSize];
int byteCount = 0;
while ((byteCount = fileStream.Read(buffer, 0, bufferSize)) > 0)
{
requestStream.Write(buffer, 0, byteCount);
}
}
string result;
using (WebResponse response = request.GetResponse())
using (StreamReader reader = new StreamReader(response.GetResponseStream()))
{
result = reader.ReadToEnd();
}
Console.WriteLine(result);
}