程式 . 生活 . D小調

<UserControl x:Class="WebCamCapture.MainPage"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

mc:Ignorable="d"

d:DesignHeight="500" d:DesignWidth="600">

<Grid x:Name="LayoutRoot" Background="White">

<Button Content="啟動WebCam" Height="23" HorizontalAlignment="Left" Margin="10,225,0,0" Name="btnEnableWebCam" VerticalAlignment="Top" Width="95" Click="btnEnableWebCam_Click" />

<Canvas Height="80" HorizontalAlignment="Left" Margin="20,23,0,0" Name="cvsMain" VerticalAlignment="Top" Width="100"></Canvas>

<Button Content="拍照" Height="23" HorizontalAlignment="Left" Margin="10,254,0,0" Name="btnTakePic" VerticalAlignment="Top" Width="95" Click="btnTakePic_Click" />

<Image Name="imgShot" Stretch="Fill" Margin="133,118,0,0" VerticalAlignment="Top" HorizontalAlignment="Left" Width="400" Height="320" />

</Grid>

</UserControl>

using System.Windows;

using System.Windows.Controls;

using System.Windows.Media;

using System.Windows.Media.Imaging;

namespace WebCamCapture

{

public partial class MainPage : UserControl

{

public MainPage()

{

InitializeComponent();

}

CaptureSource captureSource = new CaptureSource();

private void btnEnableWebCam_Click(object sender, RoutedEventArgs e)

{

//RequestDeviceAccess()

//要求存取用戶端系統上所有可用的擷取裝置 (音訊或視訊)。

//如果使用者依據對存取要求對話方塊提示的回應授與裝置存取，或要求在某些情況下自動授與，則為 true。如果使用者未授與存取或存取遭其他因數拒絕，則為 false

//AllowedDeviceAccess

//取得值，這個值會報告使用者先前是否曾依據對裝置存取 UI 提示的儲存回應授與裝置存取。

//如果使用者曾依據對存取要求對話方塊提示的回應授與裝置存取，或要求在某些情況下自動授與，則為 true。如果使用者未授與存取或存取遭其他因數拒絕，則為 false。

if (CaptureDeviceConfiguration.RequestDeviceAccess() || CaptureDeviceConfiguration.AllowedDeviceAccess)

{

VideoBrush videoBrush = new VideoBrush();

this.cvsMain.Background = videoBrush;

videoBrush.SetSource(captureSource);

//加入擷取圖片完成事件

captureSource.CaptureImageCompleted += captureSource_CaptureImageCompleted;

captureSource.Start();

}

else

{

MessageBox.Show("讀取視訊發生問題");

}

}

void captureSource_CaptureImageCompleted(object sender, CaptureImageCompletedEventArgs e)

{

//使用 WriteableBitmap 去承接截完圖後的結果

WriteableBitmap capBitmap = e.Result;

this.imgShot.Source = capBitmap;

}

private void btnTakePic_Click(object sender, RoutedEventArgs e)

{

//啟動擷取圖片

captureSource.CaptureImageAsync();

}

}

}