我有一个带标题的窗口。当用户从下拉列表中选择选项时,标题图像可能会更改。问题在于当图像加载时,它会变成模糊、拉伸和像素化。我正在使用的是PNG文件,在动态设置源之前它们看起来很好。
这是我用来更改图像源的代码:
string strUri2 = String.Format(@"pack://application:,,,/MyAssembly;component/resources/main titles/{0}", CurrenSelection.TitleImage);
Stream iconStream2 = App.GetResourceStream(new Uri(strUri2)).Stream;
imgTitle.Source = HelperFunctions.returnImage(iconStream2);
这里是辅助函数。
public static BitmapImage returnImage(Stream iconStream)
{
Bitmap brush = new Bitmap(iconStream);
System.Drawing.Image img = brush.GetThumbnailImage(brush.Height, brush.Width, null, System.IntPtr.Zero);
var imgbrush = new BitmapImage();
imgbrush.BeginInit();
imgbrush.StreamSource = ConvertImageToMemoryStream(img);
imgbrush.CreateOptions = BitmapCreateOptions.PreservePixelFormat;
imgbrush.EndInit();
var ib = new ImageBrush(imgbrush);
return imgbrush;
}
public static MemoryStream ConvertImageToMemoryStream(System.Drawing.Image img)
{
var ms = new MemoryStream();
img.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
return ms;
}
还有XAML
<Image x:Name="imgTitle" HorizontalAlignment="Left" VerticalAlignment="Bottom" Grid.Column="1" Grid.Row="1" Stretch="None" d:IsLocked="False"/>
参考文献:
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
有人有任何想法吗?发生了什么事?