问题:

I have a canvas which contains a few textblocks and I need to find the top, left corner points that I assigned them in xaml. How can I get those two properties? When I loop through the framework elements on the canvas I can't seem to find those to properties listed.

回答1:

Here some examples how to get the values:

foreach(FrameworkElement fe in canvas.Children){

   // example 0
   double top=(double)fe.GetValue(Canvas.TopProperty);
   double left=(double)fe.GetValue(Canvas.LeftProperty);

   // example 1
   double top1=Canvas.GetTop(fe);
   double left1=Canvas.GetLeft(fe);

}

See http://msdn.microsoft.com/en-us/library/ms749011.aspx and http://msdn.microsoft.com/en-us/library/system.windows.controls.canvas.top.aspx for more information

回答2:

Elegant solution

foreach (FrameworkElement fe in Canvas.Children)
         Thickness margin = fe.Margin;

MessageBox.Show("Left: " + margin.Left + "Top: " + margin.Top);