using ImageGear.Core;
using ImageGear.Display;
using ImageGear.Formats;
using ImageGear.Windows.Controls;
using ImageGear.TWAIN;

            if (App.Current.Host.Source.DnsSafeHost == string.Empty)
            {
                statusText.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)
                {
                    statusText.Text = "Failed to retrieve license from licensing web service. Exception: " + error.ToString();
                }
                else
                {
                    // Initialize format components
                    ImGearCommonFormats.Initialize();
                    UpdateUI();
                }
            });
            // Set solution name, triggers request from licensing service for license.
            ImGearLicense.SetSolutionName("AccuSoft 5-44-20");

buttonScan.Click += new RoutedEventHandler(buttonScan_Click);

void UpdateUI()
{   
    if (!System.Runtime.InteropServices.Automation.AutomationFactory.IsAvailable)
    {
        statusText.Text = "Right click to install the application onto this computer.";
        buttonScan.Content = "Install OOB";
    }
    else if (!ImGearTWAIN.IsAvailable)
    {
        statusText.Text = "Click 'Install' to install TWAIN onto this computer.";
        buttonScan.Content = "Install TWAIN";
    }
    else
    {
        statusText.Text = "Click 'Scan' to acquire an image.";
        buttonScan.Content = "Scan";
    }
}

void buttonScan_Click(object sender, RoutedEventArgs e)
        {
            // Verify if TWAIN technology is available in the current environment
            if (!ImGearTWAIN.IsAvailable)
            {
                // Check whether the COM Automation feature in Silverlight
                // is available to the application. This will check if the 
                // app is running out of browser and with elevated permissions.
                if (!System.Runtime.InteropServices.Automation.AutomationFactory.IsAvailable)
                {
                    MessageBox.Show(
                        String.Format("The application must be running out of browser in order to acquire images through TWAIN.{0}{0}To install the application to run out of browser, right click anywhere in the application and select \"Install SilverlightTwainTutorial Application onto this computer\"", Environment.NewLine),
                        "The application must be running out of browser.",
                        MessageBoxButton.OK);
                }
                // App is running OOB with elevated permissions.
                // The TWAIN technology is not installed
                // on this machine.
                else
                {
                    // See the "Using the ImageGear for Silverlight TWAIN Installer" help topic to discover options
                    // for installing required TWAIN components at runtime.
                    MessageBox.Show(
                        String.Format("The required TWAIN components are not available on the client computer."),
                        "TWAIN Components Required",
                        MessageBoxButton.OK);
                }
                return;
            }
            // The TWAIN technology is available in the current environment.
            else
            {
                using (ImGearTWAIN twain = new ImGearTWAIN())
                {
                    try
                    {
                        // Create a TWAIN identity for the application
                        ImGearApplicationIdentity identity =
                            new ImGearApplicationIdentity();
                        identity.ProductName = "Silverlight Tutorial";
                        // indicate that we want to use the User Interface
                        // of the TWAIN Data Source Manager and of the
                        // TWAIN Data Source.
                        twain.UseUI = true;
                        // Open a connection with a Data Source. Passing in an
                        // empty string for the sourceName will open the Data
                        // Source Manager's UI, allowing the user to select the
                        // source.
                        twain.OpenSource("", identity);
                        // Acquire an image to an ImGearPage.
                        ImGearPage igPage = twain.AcquireToPage();
                        pageView.Display = new ImGearPresentationPageDisplay(igPage);
                        pageView.Update();
                    }
                    catch (ImGearException igex)
                    {
                        MessageBox.Show(igex.Message,
                            "An exception occurred during scanning.",
                            MessageBoxButton.OK);
                    }
                }
            }
        }