using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
using System.Net;
using System.IO;

namespace WpfApplication1
{
    /// <summary>
    /// Interaction logic for ImageUpload.xaml
    /// </summary>
    public partial class ImageUpload : Window
    {
        public ImageUpload()
        {
            InitializeComponent();
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            var postData = "";
            var boundary = "---------FormBoundary-sadkd22dasd---------";
            var template = "\r\n\r\n" + boundary + "\r\n" +
                           "Content-Disposition: form-data; name=\"{0}\";" + "\r\n\r\n" +
                           "{1}";
            var req = HttpWebRequest.Create("http://www.imageshack.us/upload_api.php");
            req.Method = "POST";
            req.Credentials = CredentialCache.DefaultCredentials;
            req.ContentType = "multipart/form-data; boundary=" + boundary;

            postData += string.Format(template, "key", "359EGLMNfb2a865f0a45adb4fd51e3f9f390739e");
            postData += string.Format(template, "type", "base64");

            // get base64 data from image
            byte[] bytes = File.ReadAllBytes(@"D:\tmp\WpfApplication1\WpfApplication1\Images\Icon128.gif");
            string encoded = Convert.ToBase64String(bytes);
            postData += string.Format("\r\n\r\n" + boundary + "\r\n" +
                        "Content-Disposition: form-data; name=\"{0}\"; filename=\"Icon128.gif\" \r\n" +
                        "Content-Type=image/gif \r\n\r\n" +
                        "{1}", "fileupload", encoded);
            postData += "\r\n\r\n" + boundary + "--";

            byte[] reqData = Encoding.UTF8.GetBytes(postData);
            req.ContentLength = reqData.Length;
            using (Stream dataStream = req.GetRequestStream())
            {
                dataStream.Write(reqData, 0, reqData.Length);
            }

            var res = (HttpWebResponse)req.GetResponse();
            var resStream = res.GetResponseStream();
            var reader = new StreamReader(resStream);
            string resString = reader.ReadToEnd();
            txt1.Text = resString;
        }
    }
}