Windows Store apps开发[47]使用默认程序打开文件

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[DevDiv原创]Windows 8 开发Step by Step

小引

在Windows 8中，有时候，我们电脑中的文件，需要启动别的程序来打开，或者有时候我们需要通过浏览器打开某个链接，这时候我们就需要用到Windows.System.Launcher。今天我就通过代码示例，来介绍如何打开文件或者链接。

本文参考了：

http://msdn.microsoft.com/zh-cn/library/windows/apps/windows.system.launcher

打开文件

通过默认程序打开文件

private async void DefaultLaunch(object sender, RoutedEventArgs e)
{
    // Path to the file in the app package to launch
    string imageFile = @"data\[DevDiv翻译]Metro Revealed_ Building Windows 8 apps with XAML and C#中文翻译合集_2012_09_03.pdf";

    var file = await Windows.ApplicationModel.Package.Current.InstalledLocation.GetFileAsync(imageFile);

    if (file != null)
    {
        // Launch the retrieved file
        var success = await Windows.System.Launcher.LaunchFileAsync(file);

        if (success)
        {
            // File launched
        }
        else
        {
            // File launch failed
        }
    }
    else
    {
        // Could not find file
    }
}

运行效果：

通过程序列表打开文件

private async void DisplayApplicationPicker(object sender, RoutedEventArgs e)
{
    // Path to the file in the app package to launch
    string imageFile = @"data\7.jpg";

    var file = await Windows.ApplicationModel.Package.Current.InstalledLocation.GetFileAsync(imageFile);

    if (file != null)
    {
        // Set the option to show the picker
        var options = new Windows.System.LauncherOptions();
        options.DisplayApplicationPicker = true;

        // Launch the retrieved file
        bool success = await Windows.System.Launcher.LaunchFileAsync(file, options);
        if (success)
        {
            // File launched
        }
        else
        {
            // File launch failed
        }
    }
    else
    {
        // Could not find file
    }
}

运行效果

去商店搜索对应的程序来打开文件

private async void RecommendedApp(object sender, RoutedEventArgs e)
{
    // Path to the file in the app package to launch
    string imageFile = @"data\1.BeyondVincent";

    // Get the image file from the package's image directory
    var file = await Windows.ApplicationModel.Package.Current.InstalledLocation.GetFileAsync(imageFile);

    if (file != null)
    {
        // Set the recommended app
        var options = new Windows.System.LauncherOptions();

        // 设置为应用商店中要推荐的应用的程序包系列名称
        options.PreferredApplicationPackageFamilyName = "BeyondVincent格式文件程序";

        // 设置为该应用的名称
        options.PreferredApplicationDisplayName = "BV_Launcher";


        // Launch the retrieved file pass in the recommended app 
        // in case the user has no apps installed to handle the file
        bool success = await Windows.System.Launcher.LaunchFileAsync(file, options);
        if (success)
        {
            // File launched
        }
        else
        {
            // File launch failed
        }
    }
    else
    {
        // Could not find file
    }
}

运行效果

打开链接

private async void OpenDevDiv(object sender, RoutedEventArgs e)
{
    // The URI to launch
    string uriToLaunch = @"http://www.DevDiv.com";

    // Create a Uri object from a URI string 
    var uri = new Uri(uriToLaunch);

    // Launch the URI
    var success = await Windows.System.Launcher.LaunchUriAsync(uri);

    if (success)
    {
        // URI launched
    }
    else
    {
        // URI launch failed
    }
}

代码下载地址：