如何使用GDI +使用不同的颜色绘制线条? [英] How to draw lines using different Color using GDI+?

问题描述

我需要创建一个动态的点列表，可以随时添加新的点.我想画线以使用不同的颜色将它们连接起来.颜色基于这些点的ID，将从数据库中检索这些ID.

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.

推荐答案

创建一个 Graphics.DrawLine() [

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

/ravi

这不是用于控制台的东西.请查看我过去的答案:
在mdi子表单之间画线 [在面板上捕获图形 [ Paint是一种哪种好玩的方法? (DataGridViewImageCell.Paint(...)) [连接不同的控件 [矢量图形软件，例如C#或VB.NET中的CorelDraw或Inkscape [ ^ ].

基本上，您需要使用类System.Windows.Controls.Canvas并在其上放置一些UI元素:
http://msdn.microsoft.com/en-us/library/system. windows.controls.canvas.aspx [ ^ ].

—SA

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

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