C# DrawingGroup-交叉线程
我有一个类,它有两个字段和一些绘图方法:C# DrawingGroup-交叉线程,c#,wpf,thread-safety,drawing,multithreading,C#,Wpf,Thread Safety,Drawing,Multithreading,我有一个类,它有两个字段和一些绘图方法: public class DrawingTool { private readonly DrawingGroup _drawingGroup; private DrawingImage _imageSource; public DrawingTool() { _drawingGroup = new DrawingGroup(); _imageSource = new DrawingImag
public class DrawingTool
{
private readonly DrawingGroup _drawingGroup;
private DrawingImage _imageSource;
public DrawingTool()
{
_drawingGroup = new DrawingGroup();
_imageSource = new DrawingImage(_drawingGroup);
}
public DrawingImage GetImageSource()
{
return _imageSource;
}
public void DrawSomething()
{
using (DrawingContext dc = _drawingGroup.Open()) // HERE'S AN ERROR - _drawing group is being used by another thread (InvalidOperationException)
{
// draw something here
}
}
}
这是一个WPF
项目,因此我还有一张图像
:
<Image x:Name="MyImage" Width="320" Height="240"></Image>
我从评论中得到一个错误。。。我试图调用DrawSomething()
方法,并在DrawSomething()
内部使用CheckAccess()
,但没有帮助。如何使其工作成为可能?
提前谢谢你的帮助
[编辑1.]也许我应该使用不同于
DrawingGroup
[编辑2.]没人有主意吗(好的,我找到了解决方案……很明显……我必须在主线程(在主窗口构造函数中)中初始化整个绘图工具,然后设置
MyImage.Source
(也在同一个位置)。现在一切都可以正常工作了!:)
_drawingTool = new DrawingTool();
Dispatcher.Invoke(() => MyImage.Source = _drawingTool.GetImageSource());
_device.FrameReady += (sender, args) => Dispatcher.Invoke(() =>
{
_drawingTool.DrawSomething();
});