在Windows 8应用中显示动态图片库？

Question

目前，我正在开发一个简单的Windows 8应用程序，以作为概念上的准系统证明以解决更复杂的问题。

目前，我有一个文本框和两个按钮。 一个按钮允许您选择一个文件夹（它将在我的文本框中填充文件夹路径）。

另一个按钮应返回当前所选文件夹中前5个图像的绝对路径，但是在Win8应用程序中使用FileOpenPicker时遇到一些问题。

我想要做的是，当单击此按钮时，除了返回图像的前5条路径，我想以栅格格式显示它们，除了向右延伸以外，向下延伸的方式更像传统网站。

我到目前为止所拥有的：

XAML：

<StackPanel Grid.Row="2" Margin="120,0,0,0">
    <StackPanel Orientation="Horizontal" Margin="0,20,0,20">
        <TextBox  x:Name="pictureInput" HorizontalAlignment="Left" Grid.Row="2" TextWrapping="Wrap" Text="Select Image..." VerticalAlignment="Top" Width="300" Height="41" FontSize="24"/>
        <Button Content="Browse" HorizontalAlignment="Left" Grid.Row="1" VerticalAlignment="Top" Height="41" Width="147" Click="Browse_Folder_Click"/>
        <TextBlock x:Name="ImgThumbHere" Grid.Column="2" Width="540"/>
        <Button Content="Find Images" HorizontalAlignment="Left" VerticalAlignment="Top" Height="90"  Width="250" Click="Find_Images"/>
    </StackPanel>
</StackPanel>

Xaml.CS：

//method to select folder : 
     private async void Browse_Folder_Click(object sender, RoutedEventArgs e)
        {
            string folderPath = "";
            FolderPicker folderPicker = new Windows.Storage.Pickers.FolderPicker();
            // Create the picker object and set options
            folderPicker.SuggestedStartLocation = Windows.Storage.Pickers.PickerLocationId.PicturesLibrary;
            // Users expect to have a filtered view of their folders depending on the scenario.
            // For example, when choosing a documents folder, restrict the filetypes to documents for your application.
            folderPicker.FileTypeFilter.Add("*");

            StorageFolder folder = await folderPicker.PickSingleFolderAsync();
            if (folder != null)
            {
                if (folder.Path != "" && folder.Path != null)
                {
                    folderPath = folder.Path;
                }
                else
                {
                    folderPath = folder.Name;
                }
            }
            else
            {
                throw new Exception("Folder path null.");
            }
            folderInput.Text = folderPath;
        }

//attempt at method to select first 5 images of selected folder : 

    private async void Find_Images(object sender, RoutedEventArgs e)
        {
            string[] picturePath;
            FileOpenPicker picPicker = new Windows.Storage.Pickers.FileOpenPicker();
            picPicker.ViewMode = PickerViewMode.Thumbnail;
            // Create the picker object and set options
            picPicker.SuggestedStartLocation = Windows.Storage.Pickers.PickerLocationId.PicturesLibrary;
            // Users expect to have a filtered view of their folders depending on the scenario.
            // For example, when choosing a documents folder, restrict the filetypes to documents for your application.
            picPicker.FileTypeFilter.Add(".png");
            picPicker.FileTypeFilter.Add(".jpg");
            picPicker.FileTypeFilter.Add(".jpeg");
            picPicker.FileTypeFilter.Add(".gif");
            picPicker.FileTypeFilter.Add(".bmp");

            for (int i = 0; i < 5; i++)
            {
                StorageFile file = picPicker.//What can be called here to return paths ?
                if (file != null)
                {
                    picturePath[i] = file.path;
                }
                else
                {
                    throw new Exception("File path null.");
                }
            }
        }

谁能帮我解决这个问题？

非常感谢。

Answer 1

看看http://msdn.microsoft.com/zh-cn/library/windows/apps/xaml/Hh758319(v=win.10).aspx

事实是，根据设计，您仅限于：

• 访问本地存储
• 访问一些知名的存储位置
• 访问专门授予的位置