Get Current Row WPF DataGrid

WPF > Controls > ItemsControl > DataGrid > ItemContainerGenerator > ContainerFromIndex

Returns the element corresponding to the item at the given index.

Example

How to get current row if row is not selected.

var index = dataGrid.Items.IndexOf(dataGrid.CurrentItem);

var row = (DataGridRow)dataGrid.ItemContainerGenerator.ContainerFromIndex(index);

Get rectangles from canvas WPF code behind

WPF > Controls > Layout > Canvas > Children


Example 

Get all rectangles from canvas.

private List<Rectangle> GetRectangles()

{

    return canvas.Children.OfType<Rectangle>().ToList();

}

Round line WPF code behind

WPF > Line 

Line line = new Line

{
 Stroke = Brushes.Blue,

 StrokeThickness = 18,

 StrokeStartLineCap = PenLineCap.Round,

 StrokeEndLineCap = PenLineCap.Round,

 Height= 50,

 X1 = 50,

 X2 = 100,

 Y1 = 10,

 Y2 = 10

};

canvas.Children.Add(line);