WPF draw grid lines

The new software needs to draw a grid, and the shading like VISIO is easy to align when drawing. In WinForm, in the painting event, you can draw a line on the canvas through Graphics through computation. It will obviously be slow and there are many codes.

 

In WPF, it can be simpler. it is not convenient to draw a proper number of straight lines and improve performance. You can create a Group and add all the straight lines to the Group, then use RenderTransform or LayoutTransform to scale according to the scaling ratio. Another simpler method is to use ImageBrush. example:

 

Private DrawingBrush _ gridBrush;

Private void docCanvas_Loaded (object sender, RoutedEventArgs e)

{

If (_ gridBrush = null ){

_ GridBrush = new DrawingBrush (new GeometryDrawing (

New SolidColorBrush (Colors. White ),

New Pen (new SolidColorBrush (Colors. LightGray), 1.0 ),

New RectangleGeometry (new Rect (0, 0, 20, 20 ))));

_ GridBrush. Stretch = Stretch. None;

_ GridBrush. TileMode = TileMode. Tile;

_ GridBrush. Viewport = new Rect (0.0, 0.0, 20, 20 );

_ GridBrush. ViewportUnits = BrushMappingMode. Absolute;

DocCanvas. Background = _ gridBrush;

}

}

In fact, it is to use small rectangles to spell out the mesh of the background.

 

Author: nocky