如何从独立存储中为二级磁贴加载图像
如何从独立存储中为二级磁贴加载图像
提问于 2012-08-20 10:40:55
我正在尝试用从PhotoChooserTask保存的图像来填充二级瓷砖背景，但由于某些原因，我无法完成此操作。我参考了很多网站，但我还没有找到合适的实现。我所要做的就是调用PhotoChooserTask，然后在完成的事件中，我将结果图像保存到独立存储中，以便稍后加载。这对我的应用程序中的HubTile有效，但由于某些原因，我无法将图像附加到辅助磁贴。到目前为止，我所掌握的情况如下：
MainPage.xaml.cs
string imageFolder = @"\Shared\ShellContent";
string shareJPEG = "shareImage.jpg";
public MainPage()
{
InitializeComponent();
photoChooserTask = new PhotoChooserTask();
photoChooserTask.Completed += new EventHandler<PhotoResult>(photoChooserTask_Completed);
}
public void changePictureMenuItem_Tap(object sender, System.Windows.Input.GestureEventArgs e)
{
try
{
photoChooserTask.Show();
}
catch (System.InvalidOperationException)
{
MessageBox.Show("An error occurred");
}
}
void photoChooserTask_Completed(object sender, PhotoResult e)
{
if (e.TaskResult == TaskResult.OK)
{
//persist the data in isolated storage
using (IsolatedStorageFile myIsolatedStorage = IsolatedStorageFile.GetUserStoreForApplication())
{
if(!myIsolatedStorage.DirectoryExists(imageFolder))
{
myIsolatedStorage.CreateDirectory(imageFolder);
}
if (myIsolatedStorage.FileExists(shareJPEG))
{
myIsolatedStorage.DeleteFile(shareJPEG);
}
string filePath = System.IO.Path.Combine(imageFolder, shareJPEG);
IsolatedStorageFileStream fileStream = myIsolatedStorage.CreateFile(filePath);
BitmapImage bitmap = new BitmapImage();
bitmap.SetSource(e.ChosenPhoto);
WriteableBitmap wb = new WriteableBitmap(bitmap);
// Encode WriteableBitmap object to a JPEG stream.
Extensions.SaveJpeg(wb, fileStream, 173, 173, 0, 100);
fileStream.Close();
}
}
}
private void CreateLiveTile(TileItem item)
{
//IsolatedStorageFile myIsolatedStorage = IsolatedStorageFile.GetUserStoreForApplication();
var title = item.Title.ToString();
string tileParameter = "Param=" + item.Title.ToString();
ShellTile Tile = CheckIfTileExist(tileParameter); // Check if Tile's title has been used
if (Tile == null)
{
//this is not working?
background = new Uri(@"isostore:/Shared/ShellContent/shareJPEG.png", UriKind.Absolute);
//background = new Uri("isostore:/Shared/ShellContent/shareJPEG.png", UriKind.Absolute);
try
{
var LiveTile = new StandardTileData
{
Title = item.TileName,
BackgroundImage = background, //not working
BackTitle = item.TileName,
BackBackgroundImage = new Uri("/background.png", UriKind.Relative),
BackContent = item.Message,
};
ShellTile.Create(new Uri("/MainPage.xaml?" + tileParameter, UriKind.Relative), LiveTile);
}
}最终，创建了第二个磁贴，但没有用于BackgroundImage的图像。如何正确调用隔离存储路径来相应地设置二级瓦片的BackgroundImage？或者还有其他我应该做或改变的事情吗？
回答 3
Stack Overflow用户
回答已采纳
发布于 2012-08-21 00:30:41
MainPage.xaml.cs
string imageFolder = @"\Shared\ShellContent";
string shareJPEG = "shareImage.jpg";
...
private void CreateLiveTile(TileItem item)
{
var title = item.Title.ToString();
string tileParameter = "Param=" + item.Title.ToString();
ShellTile Tile = CheckIfTileExist(tileParameter); // Check if Tile's title has been used
if (Tile == null)
{
string filePath = System.IO.Path.Combine(imageFolder, shareJPEG);
background = new Uri(@"isostore" + filePath, UriKind.Absolute); //this worked
...
}
}Stack Overflow用户
发布于 2012-08-20 14:29:38
您确定镜像保存成功且存在吗？您将其另存为jpeg，但引用了png文件。尝试@"\Shared\ShellContent\shareJPEG.png“
Stack Overflow用户
发布于 2015-08-11 17:40:16
首先，您应该将您的图像放在"\Shared\ShellContent“位置。您可以使用.png或.jpg文件
string imageFolder = @"\Shared\ShellContent";
string shareJPEG = "shareImage.jpg";
...
private void CreateLiveTile(TileItem item)
{
var title = item.Title.ToString();
string tileParameter = "Param=" + item.Title.ToString();
ShellTile Tile = CheckIfTileExist(tileParameter);
if (Tile == null)
{
string filePath = System.IO.Path.Combine(imageFolder, shareJPEG);
using (var iso = IsolatedStorageFile.GetUserStoreForApplication())
{
if (iso.FileExists(filePath)) // check file exist or not
background = new Uri(@"isostore:" + filePath, UriKind.Absolute);
}
...
}
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/12031730
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