C# 如何在windows phone中设置和保存背景图像?
我正在使用此代码,因此用户可以为应用程序设置自定义背景图像:C# 如何在windows phone中设置和保存背景图像?,c#,windows-phone-7,windows-phone-8,isolatedstorage,C#,Windows Phone 7,Windows Phone 8,Isolatedstorage,我正在使用此代码,因此用户可以为应用程序设置自定义背景图像: private void Button_Click(object sender, RoutedEventArgs e) { PhotoChooserTask photoChooserTask = new PhotoChooserTask(); photoChooserTask.Completed += new EventHandler<PhotoResult>(photoChoose
private void Button_Click(object sender, RoutedEventArgs e)
{
PhotoChooserTask photoChooserTask = new PhotoChooserTask();
photoChooserTask.Completed += new EventHandler<PhotoResult>(photoChooserTask_Completed);
photoChooserTask.Show();
}
void photoChooserTask_Completed(object sender, PhotoResult e)
{
if (e.TaskResult == TaskResult.OK)
{
System.Windows.Media.Imaging.BitmapImage bmp = new System.Windows.Media.Imaging.BitmapImage();
bmp.SetSource(e.ChosenPhoto);
var imageBrush = new ImageBrush
{
ImageSource = bmp,
Opacity = 0.5d
};
App.RootFrame.Background = imageBrush;
}
}
private void按钮\u单击(对象发送者,路由目标)
{
PhotoChooserTask PhotoChooserTask=新的PhotoChooserTask();
photoChooserTask.Completed+=新事件处理程序(photoChooserTask_Completed);
photoChooserTask.Show();
}
无效photoChooserTask_已完成(对象发送方,PhotoResult e)
{
if(e.TaskResult==TaskResult.OK)
{
System.Windows.Media.Imaging.BitmapImage bmp=新系统.Windows.Media.Imaging.BitmapImage();
bmp.SetSource(e.ChosenPhoto);
var imageBrush=新的imageBrush
{
ImageSource=bmp,
不透明度=0.5d
};
App.RootFrame.Background=imageBrush;
}
}
但这不会为下一次应用程序午餐保存背景图像。
现在,我如何将所选照片保存到独立存储中,以便在重新启动应用程序后仍保留为应用程序背景?异步保存图像,仅适用于WP8
public static async Task SaveImageAsync(string imageFileName, BitmapImage image)
{
// Get Students LocalFolder
IStorageFolder folder = await ApplicationData.Current.LocalFolder
.CreateFolderAsync("Images", CreationCollisionOption.OpenIfExists);
IStorageFile file = await folder.CreateFileAsync(
imageFileName, CreationCollisionOption.ReplaceExisting);
using (Stream stream = await file.OpenStreamForWriteAsync())
{
var wrBitmap = new WriteableBitmap(image);
wrBitmap.SaveJpeg(stream, image.PixelWidth, image.PixelHeight, 100, 100);
}
}
同步读取两个WP7.x WP8的图像:
public static BitmapImage LoadImage(string imageFileName)
{
BitmapImage bitmapImage = null;
using (var isoFile = IsolatedStorageFile.GetUserStoreForApplication())
{
using (var isoStream = isoFile.OpenFile(
imageFileName, FileMode.Open, FileAccess.Read))
{
bitmapImage = new BitmapImage();
bitmapImage.SetSource(isoStream);
}
}
return bitmapImage;
}
你可以在网上找到很多资源,只需谷歌一下。
选择时
IsolatedStorageSettings.ApplicationSettings["backgroundImage"]=e.OriginalFileName;
正在加载应用程序
image.Source = new BitmapImage(new Uri(IsolatedStorageSettings.ApplicationSettings["backgroundImage"], UriKind.Absolute));
您可以使用免费的EZ_Iso.dll来执行此操作 只需将位图发送到带有名称的序列化程序,然后让它处理其余的部分
//Saving
EZ_Iso.IsolatedStorageAccess.SaveImage(“MyImage”, YourImage);
//Retrieving
ImageControl.Source = EZ_Iso.IsolatedStroageAccess.GetImage(“MyImage”,Width,Height);
尝试使用
e.OriginalFileName
并将其存储在隔离存储中