从另一个类涂料的方法 [英] Paint a method from another class

问题描述

我已经在一个单独的类平局方法的形式。

I have made a draw method in a separate class to that of the form.

public class Object : Form1
 {   
    public void Draw()
    {
            SolidBrush brush = new SolidBrush(Color.Yellow);
            Graphics mapGraphics = this.CreateGraphics();
            mapGraphics.FillEllipse(brush, new Rectangle(0, 0, 12, 12));
            pacBrush.Dispose();
            mapGraphics.Dispose();
    }
}

有没有异常抛出，也没有错误。我试图调用从Form_Paint方法绘制方法，但没有任何反应都没有。我该如何解决这个问题？

There are no exceptions thrown, nor errors. I have tried to call the Draw method from the Form_Paint method, but nothing happens at all. How can I fix this?

感谢

推荐答案

要画成一个窗口，你需要使用Graphics对象，该窗口。你的方法创建一个新的Graphics对象，所以它吸引别的地方。

To draw into a window, you need to use the Graphics object for that window. Your method creates a new Graphics object, so it draws "somewhere else".

通过 e.Graphics 对象你有你的Form_Paint处理程序进入方法作为参数，并使用替代。

Pass the e.Graphics object that you have in your Form_Paint handler into the method as a parameter, and draw using that instead.

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