File Attachment and saving on serving in Silverlight, Using Relay Command in MVVM Structure

Add Relay Command in View Model

///

/// Rlc Command for Attach Command

///

public RelayCommand rlcAttach

{

  get

  {

     return new RelayCommand(AttachCommand);

   }

}

Property for FilesList to upload

///

/// Property for List of Files To upload

///

public List<FileInfo> FilesToUpload

{

     get { return lstFilesToUpload; }

     set

     {

                lstFilesToUpload = value;

                RaisePropertyChanged("FilesToUpload");

     }

}

Method getting file information in List FilesToUpload

///

/// Method for go to Attach Command

///

protected void AttachCommand()

{

try

      {

                  OpenFileDialog fileDialog = new OpenFileDialog();

            fileDialog.Multiselect = true;

            //.doc, .xls, .csv, .txt

            fileDialog.Filter = "Word 2003 Format (*.doc)|*.doc|Text Files(*.txt)|*.txt|CSV Files(*.csv)|*.csv|Excel Files (*.xlsx)|*.xlsx|Excel Files 2003 Format(*.xls)|*.xls|Word Files(*.docx)|*.docx|All Files(*.*)|*.*";

            if (fileDialog.ShowDialog() == true)

            {

                    FilesToUpload = fileDialog.Files.ToList();

            }

      }

      catch (Exception ex)

      {

         //MessageBox.Show(ex.Message);

      }

          

}

Finally Method To send Files over the server using file handler in Web Project.

///

/// Method for go to Save Command

///

protected void SaveCommand()

{

    try

    {

      foreach (FileInfo file in FilesToUpload)

      {

          //Define the Url object for the Handler

          String ApplicationURL =    System.Windows.Browser.HtmlPage.Document.DocumentUri.ToString();

          String UploderHandlerURI = ApplicationURL.Substring(0, ApplicationURL.LastIndexOf('/') + 1) + "UploadFileHandler.ashx";

          UriBuilder handlerUrl = new UriBuilder(UploderHandlerURI);

          //Set the QueryString

          handlerUrl.Query = "InputFile=" + file.Name;

          FileStream FsInputFile = file.OpenRead();

          //Define the WebClient for Uploading the Data

          WebClient webClient = new WebClient();

          //An async class for writing the file to the server

          webClient.OpenWriteCompleted += (s, evt) =>

          {

               UploadFileData(FsInputFile, evt.Result);

               evt.Result.Close();

               FsInputFile.Close();

          };

          webClient.OpenWriteAsync(handlerUrl.Uri);

          Attachments.Add(file.Name);

         }

       }

       catch (Exception)

      {

                //MessageBox.Show(ex.Message);

      }

}

Supporting Method UploadFileData in above lines....

///

/// The Below Method read the data from the input file stream

/// and write into the out stream

///

///

///

private void UploadFileData(Stream inputFile, Stream resultFile)

{

    byte[] fileData = new byte[4096];

    int fileDataToRead;

while ((fileDataToRead =inputFile.Read(fileData, 0, fileData.Length)) != 0)

   {

                resultFile.Write(fileData, 0, fileDataToRead);

   }

}

File Handler in Web Project...

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.IO;

namespace DistributionExpress.Web

{

    ///

    /// Summary description for UploadFileHandler

    ///

    public class UploadFileHandler : IHttpHandler

    {

        public void ProcessRequest(HttpContext context)

        {

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

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

            {

                byte[] bufferData = new byte[4096];

                int bytesToBeRead;

                while ((bytesToBeRead = context.Request.InputStream.Read(bufferData, 0, bufferData.Length)) != 0)

                {

                    fileStream.Write(bufferData, 0, bytesToBeRead);

                }

                fileStream.Close();

            }

        }

        public bool IsReusable

        {

            get

            {

                return false;

            }

        }

    }

}