第三章例题：自定义控件
对教材p120部分创建控件进行演示
1
using System;
2using System.Drawing;
3using System.ComponentModel;
4using System.Windows.Forms;
5
6namespace my_control
7
{
8
//所有控件必须派生自Control类
9 public class CustomControl : System.Windows.Forms.Control
10
{
11 //重载控件的OnPaint方法
12 protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
13 {
14 //绘制字符串
15 e.Graphics.DrawString("Written with GDI+ on OnPaint event",
16 new Font("Arial",12), new SolidBrush(Color.Red), 0, 0);
17
}
18 }
19
}
using System;2
using System.Drawing;3
using System.ComponentModel;4
using System.Windows.Forms;5
6
namespace my_control7
{
8
//所有控件必须派生自Control类9
public class CustomControl : System.Windows.Forms.Control 10
{
11
//重载控件的OnPaint方法12
protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)13
{14
//绘制字符串15
e.Graphics.DrawString("Written with GDI+ on OnPaint event", 16
new Font("Arial",12), new SolidBrush(Color.Red), 0, 0);17
}18
}19
}完整控件代码和控件测试程序下载：my_control.rar
