Upload file in Silverlight

Create ashx file to Web Application and add below code. Store this file where client bin folder is:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.IO;

namespace UtilizationReport.Web

{

    /// <summary>

    /// Summary description for FileUpload

    /// </summary>

    public class FileUpload : IHttpHandler

    {

        public void ProcessRequest(HttpContext context)

        {

            string filename = context.Request.QueryString["filename"].ToString();

            using (FileStream fs = File.Create(context.Server.MapPath("~/UtilizationReport/"+filename)))

            {

                SaveFile(context.Request.InputStream, fs);

            }

        }

        private void SaveFile(Stream stream, FileStream fs)

        {

            byte[] buffer = new byte[4096];

            int bytesRead;

            while ((bytesRead = stream.Read(buffer, 0, buffer.Length)) != 0)

            {

                fs.Write(buffer, 0, bytesRead);

            }

        }

        public bool IsReusable

        {

            get

            {

                return false;

            }

        }

    }

}

From Silverlight application when you open a dialog box:

private void btnSelectFile_Click(object sender, RoutedEventArgs e)

        {

            OpenFileDialog dlg = new OpenFileDialog();

            dlg.Filter = "All files|*.xls";

            dlg.Multiselect = false;

            if ((bool)dlg.ShowDialog())

            {

               UploadFile.UploadFiles(dlg.File.Name, dlg.File.OpenRead());

                txtSdataStatus.Text = "File uploaded successfully!";

            }

        }

In Silverlight application create class that will read file and convert to binary and send to ashx file which will save it:

public static class UploadFile

    {

        public static void UploadFiles(string filename, Stream data)

        {

            UriBuilder ub = new UriBuilder(App.Current.Host.Source.AbsoluteUri.Replace("ClientBin/YourFile.xap", "") + "FileUpload.ashx");

            ub.Query = string.Format("filename={0}", filename);

            WebClient client = new WebClient();

            client.OpenWriteCompleted += (sender, e) =>

            {

                pushdata(data, e.Result);

                e.Result.Close();

                data.Close();

            };

            client.OpenWriteAsync(ub.Uri);

        }

       public static void pushdata(Stream input, Stream output)

        {

            byte[] buffer = new byte[20000];

            int bytesRead;

            while ((bytesRead = input.Read(buffer, 0, buffer.Length)) != 0)

            {

                output.Write(buffer, 0, bytesRead);

            }

        }

    }

To Upload heavy files update web.config:

   <httpRuntime maxRequestLength="2097151" />