在PictureBox上绘制一个填充圆圈 [英] draw a fill circle on PictureBox

问题描述

在我的项目中我必须在点击星标时显示星星的名称。解决方案是在PictureBox上绘制星形，然后绘制这个PictureBox。当我点击星形时，我点击PictureBox（对象）并显示名称。

注意：我必须绘制1000多颗星。对于每个我要显示名称的星星。

in my project i have to when i click on the star show the name of the star. the solution is to draw the star on the PictureBox and them draw this PictureBox .and when i click in the star i click in the PictureBox(object) and show the name.
N.B: i have to draw more than 1000 star. for each star i want to show the name.

推荐答案

绘制实心圆是很简单的：只需从图片框中获取图像控件并使用FillEllipse方法：

Drawing a filled circle is easy: just get the Image control from your picturebox and use the FillEllipse method:

Image i = myPictureBox.Image;
using (Graphics g = Graphics.FromImage(i))
    {
    g.FillEllipse(Brushes.White, new Rectangle(100, 100, 10, 10));
    }

当你绘制它们时，只需调用myPictureBox.Invalidate（）来显示它们。

如果我是你，我创建了一个Star类，其中包括它的名称，位置和（显示）大小，这样你就可以在点击图片框时查找它。

When you have drawn them, just call myPictureBox.Invalidate() to display them all.
If I was you, I'd create a Star class which included it's name, location, and (display) size, so you could then look for it when you clicked on the picturebox.

或
图形g = pictureBox1.CreateGraphics（）;

等

or Graphics g = pictureBox1.CreateGraphics();
etc

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