我可以使用本地数据更新Mango中的实时图块吗?

时间:2011-11-06 14:48:18

标签: windows-phone-7 live-tile

我有一个使用本地SqlCe数据库的Mango WP7.5应用程序。我想添加一个LiveTile更新,显示根据当前日期和月份从本地数据库中获取的信息。

我发现的所有示例都是通过从服务器下载远程图像来更新后台,但我只需要进行本地数据库查询并在我的磁贴中显示一个字符串。

我可以这样做吗?怎么样?

1 个答案:

答案 0 :(得分:7)

是的,你可以。你必须

  1. 生成包含您的文字信息的图片
  2. 将此图像保存到隔离存储空间
  3. 通过isostore URI访问它。
  4. 以下代码显示了如何执行此操作(它更新了应用程序平铺):

    // set properties of the Application Tile
    private void button1_Click(object sender, RoutedEventArgs e)
    {
        // Application Tile is always the first Tile, even if it is not pinned to Start
        ShellTile TileToFind = ShellTile.ActiveTiles.First();
    
        // Application Tile should always be found
        if (TileToFind != null)
        {
            // create bitmap to write text to
            WriteableBitmap wbmp = new WriteableBitmap(173, 173);
            TextBlock text = new TextBlock() { FontSize = (double)Resources["PhoneFontSizeExtraLarge"], Foreground = new SolidColorBrush(Colors.White) };
            // your text from database goes here:
            text.Text = "Hello\nWorld";
            wbmp.Render(text, new TranslateTransform() { Y = 20 });
            wbmp.Invalidate();
    
            // save image to isolated storage
            using (IsolatedStorageFile isf = IsolatedStorageFile.GetUserStoreForApplication())
            {
                // use of "/Shared/ShellContent/" folder is mandatory!
                using (IsolatedStorageFileStream imageStream = new IsolatedStorageFileStream("/Shared/ShellContent/MyImage.jpg", System.IO.FileMode.Create, isf))
                {
                    wbmp.SaveJpeg(imageStream, wbmp.PixelWidth, wbmp.PixelHeight, 0, 100);
                }
            }
    
            StandardTileData NewTileData = new StandardTileData
            {
                Title = "Title",
                // reference saved image via isostore URI
                BackgroundImage = new Uri("isostore:/Shared/ShellContent/MyImage.jpg", UriKind.Absolute),
            };
    
            // update the Application Tile
            TileToFind.Update(NewTileData);
        }
    }