从 windows phone 8.1 中的 FolderPicker 获取文件夹答案

【问题标题】：Get folder from FolderPicker in windows phone 8.1从 windows phone 8.1 中的 FolderPicker 获取文件夹
【发布时间】：2015-05-07 06:00:25
【问题描述】：

我已尝试使用此代码在 Windows Phone 上获取文件夹。

    FolderPicker folderPicker = new FolderPicker();
    folderPicker.SuggestedStartLocation = PickerLocationId.Downloads;
    StorageFolder folder = await folderPicker.PickSingleFolderAsync();

    if (folder != null)
    {
        string Token = Windows.Storage.AccessCache.StorageApplicationPermissions.MostRecentlyUsedList.Add(folder, folder.Name);

    }

但PickSingleFolderAsync 在 Windows Phone 8.1 中不受支持，PickFolderAndContinue 是一个 void 函数。

如何向StorageApplicationPermissions.MostRecentlyUsedList 添加文件夹？

【问题讨论】：

标签： windows-phone-8.1

【解决方案1】：

根据MSDN File picker sample，您会注意到可以在 PickFolderAndContinue 回调方法（ContinueFolderPicker）上检索该文件夹。

以下是示例中的代码 sn-p：

public void ContinueFolderPicker(FolderPickerContinuationEventArgs args) 
    { 
        StorageFolder folder = args.Folder; 
        if (folder != null) 
        { 
            // Application now has read/write access to all contents in the picked folder (including other sub-folder contents) 
            StorageApplicationPermissions.FutureAccessList.AddOrReplace("PickedFolderToken", folder); 
            OutputTextBlock.Text = "Picked folder: " + folder.Name; 
        } 
        else 
        { 
            OutputTextBlock.Text = "Operation cancelled."; 
        } 
    }

希望这有帮助吗？

【讨论】：