我正在尝试在活动磁贴的背面显示一条推文，当我将其设置为BackContent时，它太大了......有没有办法降低字体大小？
编辑：
克劳斯，现在我无法显示瓷砖，而且由于ImageOpened调用的性质，我无法获得有关其无法工作的任何信息，我无法通过调试器逐步完成它。 ..在我的TileGenerator类中，这有效：
public static void GenerateTestTile(string strTweet, string strScreenName, string tileTitle)
{
// Define the tile's address. This is where you navigate, when the tile is clicked.
var address = "/MainPage.xaml?TileID=6";
// Check if a tile with the same address already exists
//var tile = ShellTile.ActiveTiles.FirstOrDefault(x => x.NavigationUri.ToString() == address);
var tile = ShellTile.ActiveTiles.First();
// Define our tile data.
var tileData = new StandardTileData
{
BackTitle = strScreenName,
BackContent = strTweet
};
// If the file already exists, update it.
if (tile != null)
{
tile.Update(tileData);
}
else
{
// Otherwise, create a new tile.
ShellTile.Create(new Uri(address, UriKind.Relative), tileData);
}
}
但这不是（从你的例子中得到的确切方法），它根本不对瓷砖做任何事情......
public static void GenerateExampleTile(string timeOfDay, string temperature, Uri cloudImagePath, string tileTitle)
{
// Setup the font style for our tile.
var fontFamily = new FontFamily("Segoe WP");
var fontForeground = new SolidColorBrush(Colors.White);
var tileSize = new Size(173, 173);
// Create a background rectagle for a custom colour background.
var backgroundRectangle = new Rectangle();
backgroundRectangle.Width = tileSize.Width;
backgroundRectangle.Height = tileSize.Height;
backgroundRectangle.Fill = new SolidColorBrush(Colors.Blue);
// Load our 'cloud' image.
var source = new BitmapImage(cloudImagePath);
source.CreateOptions = BitmapCreateOptions.None;
source.ImageOpened += (sender, e) => // This is important. The image can't be rendered before it's loaded.
{
// Create our image as a control, so it can be rendered to the WriteableBitmap.
var cloudImage = new Image();
cloudImage.Source = source;
cloudImage.Width = 100;
cloudImage.Height = 64;
// TextBlock for the time of the day.
TextBlock timeOfDayTextBlock = new TextBlock();
timeOfDayTextBlock.Text = timeOfDay;
timeOfDayTextBlock.FontSize = 20;
timeOfDayTextBlock.Foreground = fontForeground;
timeOfDayTextBlock.FontFamily = fontFamily;
// Temperature TextBlock.
TextBlock temperatureTextBlock = new TextBlock();
temperatureTextBlock.Text = temperature + '°';
temperatureTextBlock.FontSize = 30;
temperatureTextBlock.Foreground = fontForeground;
temperatureTextBlock.FontFamily = fontFamily;
// Define the filename for our tile. Take note that a tile image *must* be saved in /Shared/ShellContent
// or otherwise it won't display.
var tileImage = string.Format("/Shared/ShellContent/{0}.jpg", timeOfDay);
// Define the path to the isolatedstorage, so we can load our generated tile from there.
var isoStoreTileImage = string.Format("isostore:{0}", tileImage);
// Open the ISF store,
using (IsolatedStorageFile store = IsolatedStorageFile.GetUserStoreForApplication())
{
// Create our bitmap, in our selected dimension.
var bitmap = new WriteableBitmap((int)tileSize.Width, (int)tileSize.Height);
// Render our background. Remember the renders are in the same order as XAML,
// so whatever is rendered first, is rendered behind the next element.
bitmap.Render(backgroundRectangle, new TranslateTransform());
// Render our cloud image
bitmap.Render(cloudImage, new TranslateTransform()
{
X = 8, // Left margin offset.
Y = 54 // Top margin offset.
});
// Render the temperature text.
bitmap.Render(temperatureTextBlock, new TranslateTransform()
{
X = 124,
Y = 63
});
// Render the time of the day text.
bitmap.Render(timeOfDayTextBlock, new TranslateTransform()
{
X = 12,
Y = 6
});
// Create a stream to store our file in.
var stream = store.CreateFile(tileImage);
// Invalidate the bitmap to make it actually render.
bitmap.Invalidate();
// Save it to our stream.
bitmap.SaveJpeg(stream, 173, 173, 0, 100);
// Close the stream, and by that saving the file to the ISF.
stream.Close();
}
// Define the tile's address. This is where you navigate, when the tile is clicked.
var address = "/MainPage.xaml?TileID=" + timeOfDay;
// Check if a tile with the same address already exists
var tile = ShellTile.ActiveTiles.FirstOrDefault(x => x.NavigationUri.ToString() == address);
// Define our tile data.
var tileData = new StandardTileData
{
BackgroundImage = new Uri(isoStoreTileImage, UriKind.Absolute),
Title = tileTitle,
};
// If the file already exists, update it.
if (tile != null)
{
tile.Update(tileData);
}
else
{
// Otherwise, create a new tile.
ShellTile.Create(new Uri(address, UriKind.Relative), tileData);
}
};
}
这两种方法都是以这种方式调用的......
public class ScheduledAgent：ScheduledTaskAgent {
...
/// <summary>
/// Agent that runs a scheduled task
/// </summary>
/// <param name="task">
/// The invoked task
/// </param>
/// <remarks>
/// This method is called when a periodic or resource intensive task is invoked
/// </remarks>
protected override void OnInvoke(ScheduledTask task)
{
LoadWatchList();
}
//WATCH LIST
private void LoadWatchList()
{
if (HasConnectivity)
{
GetWatchListTweetsFromTwitter(CurrentWatchListID);
}
}
public void GetWatchListTweetsFromTwitter(int list_id)
{
WebClient wcWatchListTimeline = new WebClient();
wcWatchListTimeline.DownloadStringCompleted += new DownloadStringCompletedEventHandler(wcWatchListTimeline_DownloadStringCompleted);
wcWatchListTimeline.DownloadStringAsync(new System.Uri("https://api.twitter.com/1/lists/statuses.xml?per_page=1&list_id=" + list_id));
}
void wcWatchListTimeline_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
{
String strTweet = "content";
String strScreenName = "title";
if (e.Error != null)
{
strScreenName = "error";
strTweet = e.Error.Message;
}
else
{
XElement tweet = XElement.Parse(e.Result);
Tweet thisTweet = GetTweet(tweet);
if (thisTweet != null)
{
strTweet = thisTweet.text;
strScreenName = thisTweet.screen_name;
}
}
// TAKEN FROM EXAMPLE FOR TESTING - NOT WORKING
string timeOfday = "morning";
string temperature = "99";
string location = "San Antonio";
Uri cloudImagePath = new Uri("Images/tweetEmpty.png", UriKind.Relative);
Deployment.Current.Dispatcher.BeginInvoke(() => TileGenerator.GenerateExampleTile(timeOfday, temperature, cloudImagePath, "mainTile"));
//WORKING
//Deployment.Current.Dispatcher.BeginInvoke(() => TileGenerator.GenerateTile(strTweet, strScreenName, "mainTile"));
NotifyComplete();
}
protected Tweet GetTweet(XElement Xdata)
{
List<Tweet> listTweets = (from tweet in Xdata.Descendants("status")
select new Tweet
{
screen_name = tweet.Element("user").Element("screen_name").Value,
text = tweet.Element("text").Value
}).ToList<Tweet>();
if (listTweets.Count > 0)
{
return listTweets[0];
}
else
{
return null;
}
}
}