同系列文章：
功能说明
- 基于AForge.NET实现视频与图像抓取
开发工具
- Visual Studio v2015
- .NET Framework 4 Client Profile
- AForge.NET 2.2.5
WPF与WinForm控件交互
要实现视频功能，需要使用AForge.Controls命名空间中的VideoSourcePlayer控件。这是一个WinForm控件，要在WPF程序中使用，我们需要做如下4步：
-
添加引用：
在.NET选项卡中选择WindowsFormsIntegration
在浏览选项卡中添加3个AForge.NET类库AForge.Controls.dll
AForge.Video.dll
AForge.Video.DirectShow.dll -
在XAML中添加System.Windows.Forms.Integration命名空间
xmlns:wfi ="clr-namespace:System.Windows.Forms.Integration;assembly=WindowsFormsIntegration"
-
在XAML中添加AForge.Controls命名空间
xmlns:aforge ="clr-namespace:AForge.Controls;assembly=AForge.Controls"
-
在XAML中加入VideoSourcePlayer可视控件
<wfi:WindowsFormsHost Grid.Row="1" Margin="8,0"> <aforge:VideoSourcePlayer x:Name="vsp"/> </wfi:WindowsFormsHost>
演示程序界面
源代码下载
源代码
MainWindow.xaml
<Window x:Class="Splash.MainWindow"
xmlns:wfi ="clr-namespace:System.Windows.Forms.Integration;assembly=WindowsFormsIntegration"
xmlns:aforge ="clr-namespace:AForge.Controls;assembly=AForge.Controls"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:my="clr-namespace:Splash;assembly=FingerPictureBox"
Title="FaceCapture-AForgeNET-WPF" mc:Ignorable="d" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" d:DesignHeight="480" d:DesignWidth="902" SizeToContent="WidthAndHeight" WindowStartupLocation="CenterScreen" ResizeMode="CanMinimize" AllowDrop="True" Closing="Window_Closing">
<Grid AllowDrop="True">
<Grid.ColumnDefinitions>
<ColumnDefinition />
<ColumnDefinition />
</Grid.ColumnDefinitions>
<Grid Grid.Column="0" AllowDrop="False">
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition/>
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<ComboBox Grid.Row="0" Name="comboBoxVideoDevices" FontSize="16" Margin="8,4" IsReadOnly="True"/>
<wfi:WindowsFormsHost Grid.Row="1" Margin="8,0">
<aforge:VideoSourcePlayer x:Name="vsp"/>
</wfi:WindowsFormsHost>
<StackPanel Grid.Row="2" Orientation="Horizontal" Height="60" HorizontalAlignment="Stretch" >
<Button Name="button_Play" Height="40" Width="140" Margin="40,4,20,10" Click="button_Play_Click">
<StackPanel Orientation="Horizontal" VerticalAlignment="Center">
<Image Name="image_Play" Width="32" Height="32" />
<Label Name="label_Play" Content="开启视频" VerticalContentAlignment="Center" FontSize="16" Padding="4" />
</StackPanel>
</Button>
<Button Name="button_Capture" Height="40" Width="140" Margin="40,4,40,10" Click="button_Capture_Click">
<StackPanel Orientation="Horizontal" VerticalAlignment="Center">
<Image Name="image_Capture" Width="32" Height="32" />
<Label Content="抓拍图像" VerticalContentAlignment="Center" FontSize="16" Padding="4"/>
</StackPanel>
</Button>
</StackPanel>
</Grid>
<Grid Grid.Column="1">
<Grid.RowDefinitions>
<RowDefinition />
<RowDefinition />
</Grid.RowDefinitions>
<StackPanel Grid.Row="0" Orientation="Horizontal">
<my:FingerPictureBox Height="210" Name="fingerPictureBox1" Width="210" BorderThickness="5" BorderBrush="DarkGreen" Margin="5"/>
<my:FingerPictureBox Height="210" Name="fingerPictureBox2" Width="210" BorderThickness="5" BorderBrush="DarkGreen" Margin="5"/>
</StackPanel>
<StackPanel Grid.Row="1" Orientation="Horizontal">
<my:FingerPictureBox Height="210" Name="fingerPictureBox3" Width="210" BorderThickness="5" BorderBrush="DarkGreen" Margin="5"/>
<my:FingerPictureBox Height="210" Name="fingerPictureBox4" Width="210" BorderThickness="5" BorderBrush="DarkGreen" Margin="5"/>
</StackPanel>
</Grid>
</Grid>
</Window>
MainWindow.xaml.cs
/* ----------------------------------------------------------
文件名称：MainWindow.xaml.cs
作者：秦建辉
微信：splashcn
博客：http://www.firstsolver.com/wordpress/
开发环境：
Visual Studio V2015
.NET Framework 4 Client Profile
AForge.NET 2.2.5
版本历史：
V1.0 2016年11月01日
基于AForge.NET实现视频与图像抓取
参考资料：
http://www.aforgenet.com/framework/
------------------------------------------------------------ */
using AForge.Video.DirectShow;
using System;
using System.Windows;
using System.Windows.Media.Imaging;
namespace Splash
{
/// <summary>
/// MainWindow.xaml 的交互逻辑
/// </summary>
public partial class MainWindow : Window
{
BitmapSource ImagePlay;
BitmapSource ImageStop;
public MainWindow()
{
InitializeComponent();
// 设置窗体图标
this.Icon = System.Windows.Interop.Imaging.CreateBitmapSourceFromHIcon(
Properties.Resources.FingerPictureBox.Handle,
Int32Rect.Empty,
BitmapSizeOptions.FromEmptyOptions());
// 图像源初始化
ImagePlay = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(
Properties.Resources.Button_Play_icon2.GetHbitmap(),
IntPtr.Zero,
Int32Rect.Empty,
BitmapSizeOptions.FromEmptyOptions());
ImageStop = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(
Properties.Resources.Button_Stop_icon.GetHbitmap(),
IntPtr.Zero,
Int32Rect.Empty,
BitmapSizeOptions.FromEmptyOptions());
// 设置按钮图像
image_Play.Source = ImagePlay;
image_Capture.Source = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(
Properties.Resources.capture.GetHbitmap(),
IntPtr.Zero,
Int32Rect.Empty,
BitmapSizeOptions.FromEmptyOptions());
// 设置窗体装载后事件处理器
this.Loaded += new RoutedEventHandler(MainWindow_Loaded);
}
private void MainWindow_Loaded(object sender, RoutedEventArgs e)
{ // 设定初始视频设备
comboBoxVideoDevices.ItemsSource = new FilterInfoCollection(FilterCategory.VideoInputDevice);
comboBoxVideoDevices.DisplayMemberPath = "Name";
if(comboBoxVideoDevices.Items.Count > 0)
{
comboBoxVideoDevices.SelectedIndex = 0;
if (comboBoxVideoDevices.Items.Count == 1) comboBoxVideoDevices.IsEnabled = false;
}
else
{
button_Play.IsEnabled = false;
button_Capture.IsEnabled = false;
}
// 设置图片框初始图像
BitmapSource bs = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(
Properties.Resources.noimage.GetHbitmap(),
IntPtr.Zero,
Int32Rect.Empty,
BitmapSizeOptions.FromEmptyOptions());
fingerPictureBox1.InitialImage = bs;
fingerPictureBox2.InitialImage = bs;
fingerPictureBox3.InitialImage = bs;
fingerPictureBox4.InitialImage = bs;
}
private void button_Play_Click(object sender, RoutedEventArgs e)
{
if (image_Play.Source == ImagePlay)
{
if (comboBoxVideoDevices.SelectedIndex != -1)
{ // 开启视频
vsp.VideoSource = new VideoCaptureDevice(((FilterInfo)comboBoxVideoDevices.SelectedItem).MonikerString);
vsp.Start();
if (vsp.IsRunning)
{ // 改变按钮为“停止”状态
image_Play.Source = ImageStop;
label_Play.Content = "停止";
// 允许拍照
button_Capture.IsEnabled = true;
}
}
}
else
{
if (vsp.IsRunning)
{ // 停止视频
vsp.SignalToStop();
vsp.WaitForStop();
// 改变按钮为“开始”状态
image_Play.Source = ImagePlay;
label_Play.Content = "开启视频"; ;
// 关闭拍照
button_Capture.IsEnabled = false;
}
}
}
private void button_Capture_Click(object sender, RoutedEventArgs e)
{
// 判断视频设备是否开启
if (vsp.IsRunning)
{ // 进行拍照
for (Int32 i = 1; i <= 4; i++)
{
object box = this.FindName("fingerPictureBox" + i);
if (box is FingerPictureBox)
{
if ((box as FingerPictureBox).ActiveImage == (box as FingerPictureBox).InitialImage)
{ // 更新图像
(box as FingerPictureBox).ActiveImage = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(
vsp.GetCurrentVideoFrame().GetHbitmap(),
IntPtr.Zero,
Int32Rect.Empty,
BitmapSizeOptions.FromEmptyOptions());
break;
}
}
}
}
}
private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{
if (vsp.IsRunning)
{ // 停止视频
vsp.SignalToStop();
vsp.WaitForStop();
}
}
}
}