.NET equivalent to Me.Circle?

[joker77]

Hey,

 

Just wondering is there any .NET equivalent to the Me.Circle method on a form for drawing a circle?

 

Thanks

[MrPaul]

Graphics object

 

Indeed there is an equivalent - .NET would appear a poor technology if something as simple as drawing a circle on a window wasn't possible ;). However, the method of doing so has changed a little from VB6. All drawing operations must be performed on a Graphics object. If you're drawing in the Paint event then a Graphics object is passed within the PaintEventArgs:

 

'Assumes the following Imports:
Imports System.Windows.Forms
Imports System.Drawing

   'Paint event
   Private Sub MyForm_Paint(ByVal sender As Object, ByVal e As PaintEventArgs) Handles Me.Paint

       'Draw a blue circle 40 pixels in diameter in the center of the form
       e.Graphics.DrawEllipse(Pens.Blue, _
           CType((Me.ClientSize.Width / 2) - 20, Integer), _
           CType((Me.ClientSize.Height / 2) - 20, Integer), _
           40, 40)

   End Sub

 

If you wish to draw the circle at some other point in the code then you will have to create a Graphics object using the hWnd of the form or its BackgroundImage.

 

Good luck :cool:

[joker77]

Thanks for that - will get me started anyways - I haven't got the chance to do much with .NET so I might need to ask another couple of questions yet!

[snarfblam]

If you are drawing on a control, then you should know that each control also supplies a CreateGraphics method.

[color="SeaGreen"]'Draw a circle that extends to the edges of SomeControl[/color]

[color="Blue"]Dim[/color] g [color="Blue"]As[/color] Graphics = SomeControl.CreateGraphics()

g.DrawEllipse( _

    Pens.Black, SomeControl.Bounds)

g.Dispose()

[/Code]

 

Note that you should always dispose of your Graphics objects.