SilverLight

开发平台：
C#

MainPage.xaml.cs：源码内容
							﻿
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
namespace SL4Demo
{
    public partial class MainPage : UserControl
    {
        // initialize the new instance of the Capture Source
        private CaptureSource captureSource = new CaptureSource();
        public MainPage()
        {
            InitializeComponent();
            this.Loaded += new RoutedEventHandler(MainPage_Loaded);
            btnPlayCapture.Click += new RoutedEventHandler(btnPlayCapture_Click);
            btnStopCapture.Click += new RoutedEventHandler(btnStopCapture_Click);
            btnCaptureDevice.Click += new RoutedEventHandler(btnCaptureDevice_Click);
        }
        void btnCaptureDevice_Click(object sender, RoutedEventArgs e)
        {
            TryCaptureDevice();
        }
        void btnStopCapture_Click(object sender, RoutedEventArgs e)
        {
            // Stop capturing
            captureSource.Stop();
            btnPlayCapture.IsEnabled = true;
            btnStopCapture.IsEnabled = false;
        }
        void btnPlayCapture_Click(object sender, RoutedEventArgs e)
        {
            // If the device is already capturing Stop it
            if (captureSource.State == CaptureState.Started)
            {
                captureSource.Stop();
            }
            // Start capturing
            captureSource.Start();
            btnPlayCapture.IsEnabled = false;
            btnStopCapture.IsEnabled = true;
        }
        void MainPage_Loaded(object sender, RoutedEventArgs e)
        {
            TryCaptureDevice();
        }
        private void TryCaptureDevice()
        {
            // Get the default video capture device
            VideoCaptureDevice videoCaptureDevice = CaptureDeviceConfiguration.GetDefaultVideoCaptureDevice();
            if (videoCaptureDevice == null)
            {
                // Default video capture device is not setup
                btnPlayCapture.IsEnabled = false;
                btnStopCapture.IsEnabled = false;
                btnCaptureDevice.IsEnabled = true;
                MessageBox.Show("You don't have any default capture device");
            }
            else
            {
                btnPlayCapture.IsEnabled = false;
                btnStopCapture.IsEnabled = false;
                // Set the Capture Source to the VideoBrush of the rectangle
                VideoBrush videoBrush = new VideoBrush();
                videoBrush.SetSource(captureSource);
                rectWebCamView.Fill = videoBrush;
                // Check if the Silverlight has already access to the device or grant access from the user
                if (CaptureDeviceConfiguration.AllowedDeviceAccess || CaptureDeviceConfiguration.RequestDeviceAccess())
                {
                    btnPlayCapture.IsEnabled = true;
                    btnStopCapture.IsEnabled = false;
                    btnCaptureDevice.IsEnabled = false;
                }
            }
        }
    }
}

						