How to draw lines using different Color using GDI+?

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I need to create a dynamic List of Points, new Point ,can be added at any time. I want to draw lines to connect them using different color. Color is based on the ID's of those points, which will be retrieved from the database.

Posted 23-Oct-12 5:00am

Judiciousbosh

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Sergey Alexandrovich Kryukov 23-Oct-12 16:04pm

In console? forget it!
--SA

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Ravi Bhavnani · Answer 1 · 2012-10-23T05:08:00

Solution 1

Create a Pen[^] of the appropriate color and use Graphics.DrawLine()[^] to draw a line using that Pen. Be sure to properly dispose your objects, e.g.

PaintEventArgs pea = ...
using (Pen p = new Pen (...)) {
   pea.Graphics.DrawLine (...)
}

/ravi

Posted 23-Oct-12 5:08am

Ravi Bhavnani

Sergey Alexandrovich Kryukov · Answer 2 · 2012-10-23T10:09:00

This thing is not for console. Please see my past answers:
Drawing Lines between mdi child forms[^],
capture the drawing on a panel[^],
What kind of playful method is Paint? (DataGridViewImageCell.Paint(...))[^].

That was for System.Drawing, which is usually used with System.Windows.Forms or with bitmaps.

Alternative type of application is WPF. I don't have answer to your particular problem (for WPF, it is extremely simple), but you can get some ideas:
Connect different controls[^],
Vector graphics software like CorelDraw or Inkscape in C# or VB.NET[^].

Basically, you need to use the class System.Windows.Controls.Canvas and put some UI elements on it:
http://msdn.microsoft.com/en-us/library/system.windows.controls.canvas.aspx[^].

—SA