Draw Diagonal Line in WPF Grid

Question

I think I am trying to do something relatively simple in WPF, but can\'t for the life of me figure out how; and think I am probably on the verge of overcomplicating it.

Answer 1

I have created a sample to draw line from code behind which will give you more control... I crated a grid which contains canvas in each cell and on canvas load i am creating a path and adding it to same canvas...

As @ Mathieu Garstecki answer we can achieve this crating path in xaml... if want to add some logic before creating path you can use my answer XAML

Code Behind

private void Canvas_Loaded(object sender, RoutedEventArgs e)
        {
            var g = new StreamGeometry();
            var context = g.Open();
            context.BeginFigure(new Point(0, 0), true, true);
            context.LineTo(new Point((sender as Canvas).ActualHeight, (sender as Canvas).ActualWidth), true, true);
            context.Close();
            System.Windows.Shapes.Path path = new System.Windows.Shapes.Path();
            path.Data = g;
            path.Stroke = new SolidColorBrush(Colors.Red);
            path.StrokeThickness = 1.4;
            (sender as Canvas).Children.Add(path);
        }

OutPut