How to upload an image in C# Smart device Application

[Udara chathuranga]

I need to develop a smart device application to upload an image to my web FTP server using C#.net. But the required classes are not available in the System.Net reference as like in the normal windows applications. What should I do ?

[PsychoCoder]

You're going to need to use the WebClient class. here's a simple example:

public static void SendRequest(System.Text.StringBuilder sReq, byte[] sbyteData, Action<PicData, int> onEventResponse = null, Action onFinally = null)
{
    var client = new WebClient();
 
    client.OpenWriteCompleted += new OpenWriteCompletedEventHandler(WcOpenWriteCompleted);
    var uri = new Uri(sReq.ToString());
    client.Headers[HttpRequestHeader.ContentLength] = sReq.Length.ToString(CultureInfo.CurrentCulture);
    client.Headers[HttpRequestHeader.Accept] = "*/*";
    client.Headers[HttpRequestHeader.ContentType] = "application/octet-stream";
 
    client.OpenWriteAsync(uri, "POST", sbyteData);
}
 
public static void WcOpenWriteCompleted(object sender, OpenWriteCompletedEventArgs e)
{
    if (e.Error == null)
    {
        var objArr = e.UserState as object[];
        var fileContent = e.UserState as byte[];
 
        Stream outputStream = e.Result;
        if (fileContent != null) outputStream.Write(fileContent, 0, fileContent.Length);
        outputStream.Flush();
        outputStream.Close();
 
    }
}

That should get you started.

[Udara chathuranga]

Thanks, But I still have the Below errors...

1.The type or namespace name 'WebClient' could not be found (are you missing a using directive or an assembly reference?)

2.The type or namespace name 'OpenWriteCompletedEventHandler' could not be found (are you missing a using directive or an assembly reference?)

I have already included the System.net reference.
As I think WebClient class is not available for smart devices in C#.Net

[PsychoCoder]

This is a simple example of uploading an image to imgur from a Windows phone:

public void UploadAsync(Stream stream)
{
    try
    {
        var webClient = new WebClient();
        webClient.Headers["Content-type"] = "application/x-www-form-urlencoded";
 
        var data = string.Format("key={0}&_fake_status=200&type=base64&image={1}", PublicKey, PhotoStreamToBase64(stream));
 
        webClient.UploadStringAsync(new Uri("http://api.imgur.com/2/upload", UriKind.Absolute), "POST", data);
 
    }
    catch (Exception ex)
    {
    }
}

static string PhotoStreamToBase64(Stream stream)
{
    if (stream == null) throw new ArgumentNullException("stream");
 
    var mStream = new MemoryStream();
    stream.CopyTo(mStream);
    var result = mStream.ToArray();
 
    var base64Img = Convert.ToBase64String(result);
    var sb = new StringBuilder();
 
    for (var i = 0; i < base64Img.Length; i += 32766)
    {
        sb.Append(Uri.EscapeDataString(base64Img.Substring(i, Math.Min(32766, base64Img.Length - i))));
    }
 
    return sb.ToString();
}

This code has been tested on a Windows Phone 7 and works. Some tweaking will need to be made to work with whatever server you're uploading to.

Happy Coding!