c# 窗体重画，形状自定义
1 using System;
2 using System.Collections.Generic;
3 using System.ComponentModel;
4 using System.Data;
5 using System.Drawing;
6 using System.Linq;
7 using System.Text;
8 using System.Windows.Forms;
9 namespace Case01_6
10 {
11 public partial class Form1 : Form
12 {
13 public Form1()
14 {
15 InitializeComponent();
16 }
17
18 public Bitmap mybit;
19
20 private void Form1_Load(object sender, EventArgs e)
21 {
22
23 mybit = new Bitmap("bai.png");
24 mybit.MakeTransparent(Color.White);
25 this.StartPosition = FormStartPosition.CenterScreen;
26 this.WindowState = FormWindowState.Normal ;
27
28 }
29
30 protected override void OnPaint(PaintEventArgs e)//方法重写
31 {
32 e.Graphics.DrawImage((Image)mybit, new Point(0, 0)); //将图像画出
33 }
34
35 private void Form1_Click_1(object sender, EventArgs e)
36 {
37 //Application.Exit();
38
39 }
40
41
42 }
43 }
效果图： 原窗体
重画窗体 白色全部过滤掉了
