<metro>摄取相片

首先，我们打开Vs2012，选择好Blank App模板。在MainPage.xaml中拉进Button和image两个空间。在Button控件中选择Click事件。经命名等后，代码如下：

<Grid Background="{StaticResource ApplicationPageBackgroundThemeBrush}">
        <Button x:Name="Start" Content="Start" HorizontalAlignment="Left" Height="39" Margin="81,40,0,0" VerticalAlignment="Top" Width="88" Click="Start_Click"/>
        <Image x:Name="image" HorizontalAlignment="Left" Height="320" Margin="81,110,0,0" VerticalAlignment="Top" Width="434"/>

    </Grid>

接着，在MainPage.xaml.cs中的Click事件里，填入一下代码就可以了：

private async void Start_Click(object sender, RoutedEventArgs e)
        {
            FileOpenPicker openPicker = new FileOpenPicker();
            openPicker.ViewMode = PickerViewMode.Thumbnail;
            openPicker.SuggestedStartLocation = PickerLocationId.Desktop;
            openPicker.FileTypeFilter.Add(".jpg");
            openPicker.FileTypeFilter.Add(".gif");
            openPicker.FileTypeFilter.Add(".png");

            StorageFile file = await openPicker.PickSingleFileAsync();

            string fileToken;
            IStorageItemAccessList futureAccess = StorageApplicationPermissions.FutureAccessList;
            fileToken = futureAccess.Add(file);

            BitmapImage src = new BitmapImage();
            src.SetSource(await file.OpenAsync(FileAccessMode.Read));
            image.Source = src;
            AutomationProperties.SetName(image, file.Name);
            
        }

然后，按F5，演示。