Developing the Application

Open MainPage.xaml.cs and add the following using statements to the top:

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using System.IO; using ImageGear.Core; using ImageGear.Display; using ImageGear.Formats; using ImageGear.Windows.Controls;

Next we need to add initialization code for ImageGear licensing and components. Add the following code to the constructor for the Page class after InitializeComponent:

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if (App.Current.Host.Source.DnsSafeHost == string.Empty) { loadText.Text = "You must run your Silverlight application from the http protocol."; return; } // Build the service URL using the current host name and set it. string webServiceUrl = string.Format("http://{0}/{1}", App.Current.Host.Source.DnsSafeHost, "ImageGearSilverlight20_WebService/SilverlightWebService.svc"); ImGearLicense.SetService(webServiceUrl); // Set delegate to handle results of license request. ImGearLicense.LicenseRequest = new ImGearLicense.DelegateLicenseRequest(delegate(Exception error) { if (error != null) { loadText.Text = "Failed to retrieve license from licensing web service. Exception: " + error.ToString(); } else { // Initialize format components ImGearCameraRawFormats.Initialize(); ImGearCommonFormats.Initialize(); ImGearAdvancedFormats.Initialize(); loadText.Text = "Click to load image file."; } }); // Set solution name, triggers request from licensing service for license. ImGearLicense.SetSolutionName("AccuSoft 5-44-20");

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if (App.Current.Host.Source.DnsSafeHost == string.Empty) 
{
    loadText.Text = "You must run your Silverlight application from the http protocol.";
    return;
}
// Build the service URL using the current host name and set it.
string webServiceUrl = string.Format("http://{0}/{1}",
    App.Current.Host.Source.DnsSafeHost,
    "ImageGearSilverlight20_WebService/SilverlightWebService.svc");
ImGearLicense.SetService(webServiceUrl);
// Set delegate to handle results of license request.
ImGearLicense.LicenseRequest = new ImGearLicense.DelegateLicenseRequest(delegate(Exception error)
{
    if (error != null)
    {
        loadText.Text = "Failed to retrieve license from licensing web service. Exception: " + error.ToString();
    }
    else
    {
        // Initialize format components
        ImGearCameraRawFormats.Initialize();
        ImGearCommonFormats.Initialize();
        ImGearAdvancedFormats.Initialize();
        loadText.Text = "Click to load image file.";
    }
});
// Set solution name, triggers request from licensing service for license.
ImGearLicense.SetSolutionName("AccuSoft 5-44-20");

If you are evaluating ImageGear for Silverlight you have to set the application's RootVisual to the application's main Page element and initialize the evaluation manager prior to the other licensing calls. Please see the Evaluation License section for more details.

Define a handler that will control what happens when the button is clicked. Add the following code to the constructor for the Page class:
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buttonOpen.Click += new RoutedEventHandler(buttonOpen_Click);

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buttonOpen.Click += new RoutedEventHandler(buttonOpen_Click);

Add the following function to the class. This creates an open file dialog, opens the selected file, and displays it in the PageView Class:

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void buttonOpen_Click(object sender, RoutedEventArgs e) { // Prompt the user to select an image file OpenFileDialog ofd = new OpenFileDialog(); ofd.Filter = "Image files (.jpg;.png;.tif;.bmp)\|.jpg;.png;.tif;.bmp\|All files (.)\|."; ofd.FilterIndex = 1; bool? result = ofd.ShowDialog(); if (!result.GetValueOrDefault(false)) return; // Open a stream to the contents of the file using (Stream f = ofd.File.OpenRead()) { // Open it with ImageGear ImGearPage igPage = ImGearFileFormats.LoadPage(f, 0); pageView.Display = new ImGearPresentationPageDisplay(igPage); pageView.Update(); } }

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void buttonOpen_Click(object sender, RoutedEventArgs e)
{
    // Prompt the user to select an image file
    OpenFileDialog ofd = new OpenFileDialog();
    ofd.Filter = "Image files (*.jpg;*.png;*.tif;*.bmp)|*.jpg;*.png;*.tif;*.bmp|All files (*.*)|*.*";
    ofd.FilterIndex = 1;
    bool? result = ofd.ShowDialog();
    if (!result.GetValueOrDefault(false))
        return;
    // Open a stream to the contents of the file  
    using (Stream f = ofd.File.OpenRead())
    {
        // Open it with ImageGear  
        ImGearPage igPage = ImGearFileFormats.LoadPage(f, 0);
        pageView.Display = new ImGearPresentationPageDisplay(igPage);
        pageView.Update();
    }
}

The sample is now complete. Right-click SilverlighttutorialTestPage.html in the Solution Explorer and set it as the start up page. Press CTRL+F5 to launch the sample.