Silverlight File Upload Component

This free Silverlight File Upload component will help you build a UI with File Upload capability with the minimum amount of coding, the example we have on this page uses the Progress Bar control to give you a visual representation of the upload progress though as the File Upload is a separate component you can implement any UI you like for it.

To use the File Upload Component you will need to add a reference to Liquid.Components.dll in your project.

How to Use the File Upload Component

To demonstrate the File Upload component we will build a simple upload page containing a Progress Bar and a file browse button, the browse dialog is a standard Silverlight dialog and allows the user to select 1 or many files.  In your Silverlight XAML:

<UserControl x:Class="FileUpload.Page"
    xmlns="http://schemas.microsoft.com/client/2007"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:liquid="clr-namespace:Liquid;assembly=Liquid"
    Width="400" Height="300">
    <Canvas>
        <liquid:ProgressBarPlus x:Name="progress" Canvas.Left="8" Canvas.Top="8" Width="200" Height="24" />
        <Button x:Name="startUpload" Canvas.Left="80" Canvas.Top="50" Content="Upload" Width="60" Height="32" Click="StartUpload_Click" />
    </Canvas>
</UserControl>


In your C# code behind file you will actually get to use the Upload component to upload the selected files and to maintain the progress bar with the upload progress.

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Windows.Browser;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

using Liquid;
using Liquid.Components;

namespace FileUpload
{
    public partial class Page : UserControl
    {
        private Uploader _uploader = new Uploader("http://localhost/vectorlight/FileUploadService.asmx");

        public Page()
        {
            InitializeComponent();

            _uploader.UploadProgressChange += new UploadEventHandler(Uploader_UploadProgressChange);
            _uploader.UploadFinished += new UploadEventHandler(Uploader_UploadFinished);
        }

        private void Uploader_UploadFinished(object sender, UploadEventArgs e)
        {
            progress.Text = "Complete.";
            progress.Complete = e.Progress;
        }

        private void Uploader_UploadProgressChange(object sender, UploadEventArgs e)
        {
            progress.Text = "Uploading " + Math.Round(e.Progress) + "% (" + e.Text + ")";
            progress.Complete = e.Progress;
        }

        private void StartUpload_Click(object sender, RoutedEventArgs e)
        {
            OpenFileDialog dialog = new OpenFileDialog();

            dialog.Filter = "Image files (*.gif;*.jpg;*.png)|*.gif;*.jpg;*.png";
            dialog.Multiselect = true;

            if (dialog.ShowDialog() == true)
            {
                _uploader.UploadFiles("myUpload1", dialog.Files, "documents/", true, "");
            }
        }
    }
}


In the example above we are handling the button Click event to display the local file browse dialog.  When the user selects a file(s) we pass the selected file list property to the File Upload component which does the rest of the work for you.

The method Uploader_UploadProgressChange is called each time a portion of a file has been uploaded, the portion sizes are specified in the File Upload component using the PacketSize property (the default is 32768 or 32KB).

Receiving the File on the Server

The File Upload component uses a web service to push the data over to the server and your receiving web server must have a web service in order to receive the data.  Below is an example of typical web service that could handle this:

using System;
using System.Collections;
using System.IO;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;

/// <summary>
/// Summary description for FileUploadService
/// </summary>
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
public class FileUploadService : System.Web.Services.WebService
{
    public FileUploadService()
    {
        //Uncomment the following line if using designed components
        //InitializeComponent();
    }

    [WebMethod]
    public string Upload(string id, string mode, string path, string name, string filedata, bool overwrite, string tag, bool final)
    {
        string filename = string.Empty;

        try
        {
            filename = Server.MapPath("~") + @"\" + path.Replace("/", @"\") + name;

            if (mode == "new")
            {
                if (File.Exists(filename) == true)
                {
                    if (overwrite)
                    {
                        File.Delete(filename);
                    }
                    else
                    {
                        return "File Already Exists";
                    }
                }

                WriteFile(filename, Convert.FromBase64String(filedata), FileMode.Create);
            }
            else
            {
                WriteFile(filename, Convert.FromBase64String(filedata), FileMode.Append);
            }
        }
        catch (Exception ex)
        {
            File.Delete(filename);
            return "File Write Error: " + ex.Message;
        }

        return "ok";
    }

    private void WriteFile(string filename, byte[] content, FileMode fileMode)
    {
        Stream target = null;
        BinaryWriter writer = null;

        try
        {
            target = File.Open(filename, fileMode);
            writer = new BinaryWriter(target);

            writer.Write(content);
        }
        catch (Exception ex)
        {
            throw new Exception("Could not write to file: " + filename + " - " + ex.Message);
        }
        finally
        {
            if (target != null)
            {
                target.Close();
            }
            if (writer != null)
            {
                writer.Close();
            }
        }
    }
}


Post your Comments

 
Latest Games
Zombie Escape
Apr 19, 2016
Plays: 1,363

Zombie Escape ScreenshotDrive fast before the crazy mutant zombies get you!

6 Ratings/4.1 Average
Car Parking
Jan 16, 2016
Plays: 1,334

Car Parking ScreenshotGuide the car to its parking space in this fun Car Parking game.

1 Rating/5 Average
Trash It
Jan 11, 2016
Plays: 1,227

Trash It ScreenshotAim for the Trash Can and get the various items of Trash in the bin.

4 Ratings/5 Average
Sky Fly
Jan 11, 2016
Plays: 1,345

Sky Fly ScreenshotFly your plane in this colorful vertical scrolling shoot-em-up. Blast the bad guys and collect any bonus's they leave behind.

1 Rating/5 Average
Professor Snappy
Jan 11, 2016
Plays: 985

Professor Snappy ScreenshotPop as many bubbles as possible in this fun and colorful bubble popping game. The levels start off easy enough but gradually get harder!

1 Rating/5 Average
Monster Match Saga
Jan 10, 2016
Plays: 1,312

Monster Match Saga ScreenshotHere we have a bunch of monsters that need to be matched up. Look out for the bomb and spinning monsters that will cause special damage!

3 Ratings/4.6 Average
Fly Bird Fly
Jan 10, 2016
Plays: 1,035

Fly Bird Fly ScreenshotGuide your friendly Bird through the maze of pipes and other obstacles collecting the Stars in this cool arcade game inspired by the legendary Flappy Bird.

1 Rating/5 Average
Life In One
Jan 10, 2016
Plays: 1,242

Life In One ScreenshotYou are stranded on an Alien planet. Your goal is to build a space rocket and escape. Start by building units to create power and mine the metal patches. Build defenses to defend your base from the advancing Aliens and Zombies!

2 Ratings/3 Average
X Pool
Jan 02, 2016
Plays: 1,726

X Pool ScreenshotPlay Pool against the computer or battle against your friends in the online mode!

3 Ratings/3 Average
Fruit Slicer
Jan 02, 2016
Plays: 993

Fruit Slicer ScreenshotSlice the fruit that is thrown up onto the screen. Slice the fruit into multiple pieces for maximum points!

1 Rating/5 Average