ComponentOne Xamarin Edition
ShowMarquee Property
Example 
C1.Xamarin.Forms.Grid Assembly > C1.Xamarin.Forms.Grid Namespace > GridBase Class : ShowMarquee Property
Gets or sets a value that indicates whether the grid shows an Excel-style marquee around the current selection.
Syntax
public bool ShowMarquee {get; set;}
Remarks
By default, the marquee is black and two pixels thick. You can customize the appearance of the marquee using the Marquee property.
Example
The code below shows how you can create a marquee with a thick rounded red border and semi-transparent red interior and use that to highlight the selection instead of the regular SelectionBackground and CursorBackground properties.
// customize the marquee
var m = _flex.Marquee;
m.Stroke = new SolidColorBrush(Colors.Red);
m.Fill = new SolidColorBrush(Color.FromArgb(0x20, 0xff, 0x80, 0x80));
m.StrokeThickness = 4;
m.RadiusX = 3;
m.RadiusY = 3;
            
// show the marquee
_flex.ShowMarquee = true;
            
// no need to highlight the selection/cursor
_flex.SelectionBackground = null;
_flex.CursorBackground = null;
See Also

Reference

GridBase Class
GridBase Members