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?
答案 0 :(得分:7)
是的,你可以。你必须
isostore
URI访问它。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);
}
}