C# 线程问题 怎么在下面的代码中加线程 才不会死

Question

C# code
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Threading;
using System.Drawing.Drawing2D;
using System.Diagnostics;
namespace Sample080410
{
    public partial class Form1 : Form
    {
        
        Bitmap Rectimage = new Bitmap(@"E:\\Rectangle.bmp", true);
        
        Bitmap Triangleimage = new Bitmap(@"E:\\Triangle.bmp", true);
        
        Bitmap Circleimage = new Bitmap(@"E:\\Circle.bmp", true);
        
        
        public Form1()
        {
            InitializeComponent();
        }        
        protected override void OnPaint(PaintEventArgs e)
        {
            Allpicture(e);
        }
        private void Allpicture(object e)
        {            PaintEventArgs ex = (PaintEventArgs)e;
            
            int rotate_Y = 100;
            
            int move_Y = 0;
            
            int z = 15;            
            int trianglemove_Y = 0;
            
            int circlemove_Y = 0;            Graphics g1 = ex.Graphics;
            Graphics g2 = ex.Graphics;
            Graphics g3 = ex.Graphics;            
             Pen pen = new Pen(Color.Red);
            Point p1 = new Point(0, 100);
            Point p2 = new Point(700, 100);
            Point p3 = new Point(300, 0);
            Point p4 = new Point(300, 700);
            Point p5 = new Point(100, 0);
            Point p6 = new Point(100, 700);
            Point p7 = new Point(500, 0);
            Point p8 = new Point(500, 700);
                        for (int i = 1; i < 60; i++)
            {
                g1.DrawLine(pen, p1, p2);
                g1.DrawLine(pen, p3, p4);
                g1.DrawLine(pen, p5, p6);
                g1.DrawLine(pen, p7, p8);                
                Thread.Sleep(1000);
                
                ex.Graphics.Clear(Color.White);                PointF point = new PointF(100, rotate_Y + move_Y);
                Matrix Matrix = new Matrix();
                Matrix.RotateAt(z, point);
                g1.Transform = Matrix;
                
                g1.DrawImageUnscaled(Rectimage, 50, 50 + move_Y);
                
                if (i % 2 == 0)
                {
                    trianglemove_Y += 1;
                    
                    PointF pointrotate = new PointF(300, rotate_Y + trianglemove_Y);
                    Matrix Matrix2 = new Matrix();
                    Matrix2.RotateAt(z, pointrotate);
                    g2.Transform = Matrix2;
                    
                    g2.DrawImageUnscaled(Triangleimage, 250, 50 + trianglemove_Y);
                }
                else
                {
                    
                    PointF pointrotate = new PointF(300, rotate_Y + trianglemove_Y);
                    Matrix Matrix2 = new Matrix();
                    Matrix2.RotateAt(z, pointrotate);
                    g2.Transform = Matrix2;
                    
                    g2.DrawImageUnscaled(Triangleimage, 250, 50 + trianglemove_Y);
                }                
                if (i % 3 == 0)
                {
                    circlemove_Y += 1;
                    
                    PointF circlepoint = new PointF(500, rotate_Y + circlemove_Y);
                    Matrix Matrix3 = new Matrix();
                    Matrix3.RotateAt(0, circlepoint);
                    g3.Transform = Matrix3;
                    
                    g3.DrawImageUnscaled(Circleimage, 450, 50 + circlemove_Y);
                }
                else
                {
                    
                    PointF circlepoint = new PointF(500, rotate_Y + circlemove_Y);
                    Matrix Matrix3 = new Matrix();
                    Matrix3.RotateAt(0, circlepoint);
                    g3.Transform = Matrix3;
                    
                    g3.DrawImageUnscaled(Circleimage, 450, 50 + circlemove_Y);
                }
                
                move_Y += 1;                
                z += 15;
            }
            ex.Graphics.Dispose();
        }
    }}
在描画时无法进行其它操作。 
一操作就引起无应答（例：右上角的关闭或整个窗口移动）导致程序死掉！
怎么用 线程解决？
如果不用 OnPaint还有什么方法？我加的线程不行protected override void OnPaint(PaintEventArgs e) 
        { 
            base.OnPaint(e); 
            t1 = new Thread(new ParameterizedThreadStart(Allpicture));             t1.Name = "t1"; 
            t1.Start(e); 
        }

Answer 1

这个绘图操作别放在 OnPaint 中， 可事先绘制好, 放入 Image 中在 OnPaint 中直接 DrawImage 即可另外，你的函数中居然有 Sleep(1000), 这样不死才怪

Answer 2

TO：huwei001982
谢谢你的回复。意思明白，但我学C#没几天整个结构停乱的。
步骤1（事先绘制好在放入Image中）如果用代码说明会更能明白
因为你说的步骤1我不知道怎么用没有PaintEventArgs 这个参数
来Graphic 一个g。还有那个Sleep（1000）是用来延迟1秒的
这个问题 我想用Timer来处理会比较OK辛苦了！

Answer 3

多做成员变量,将成员的创建都放在其他地方,创建一次.
然后在Allpicture只放绘制的代码,不要Sleep,如果可以使用双缓冲区绘制效果会好一些.

Answer 4

修改如下，测试通过using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Threading;
using System.Drawing.Drawing2D;
using System.Diagnostics;
namespace Sample080410
{
    public partial class Form1 : Form
    {
        Bitmap Rectimage = new Bitmap(@"E:\\Rectangle.bmp", true);
        Bitmap Triangleimage = new Bitmap(@"E:\\Triangle.bmp", true);
        Bitmap Circleimage = new Bitmap(@"E:\\Circle.bmp", true);        int i = 1;
        Pen pen = new Pen(Color.Red);
        //以下几个point定义无效，实际运行无效果
        //Point p1 = new Point(0, 100);
        //Point p2 = new Point(700, 100);
        //Point p3 = new Point(300, 0);
        //Point p4 = new Point(300, 700);
        //Point p5 = new Point(100, 0);
        //Point p6 = new Point(100, 700);
        //Point p7 = new Point(500, 0);
        //Point p8 = new Point(500, 700);
        int rotate_Y = 100;
        int move_Y = 0;
        int z = 15;
        int trianglemove_Y = 0;
        int circlemove_Y = 0;        private System.Windows.Forms.Timer timer1;        public Form1()
        {
            InitializeComponent();
            //下面这行代码是把Form的Load事件绑定为Form1_Load,如果不写这行代码，你要手工将设置
            this.Load+=new EventHandler(Form1_Load);
        }        
        private void Form1_Load(object sender, EventArgs e)
        {
            this.timer1 = new System.Windows.Forms.Timer();
            timer1.Tick+=new EventHandler(timer1_Tick);
            this.timer1.Interval = 1000;
            this.timer1.Enabled = true;
        }
        protected override void OnPaint(PaintEventArgs e)
        {
            base.OnPaint(e);
            //在需要重绘窗体的时候，绘制图片，以保持形状，但不移动图片位置
              AllPicture(false, e.Graphics);
            e.Graphics.Dispose();
        }        private void AllPicture(bool movePic,Graphics g)
        {
            if(g==null)
                g = this.CreateGraphics();
            //以下四行代码无效因为后面是g.Clear()
            //g.DrawLine(pen, p1, p2);
            //g.DrawLine(pen, p3, p4);
            //g.DrawLine(pen, p5, p6);
            //g.DrawLine(pen, p7, p8);
            g.Clear(Color.White);            PointF point = new PointF(100, rotate_Y + move_Y);
            Matrix Matrix = new Matrix();
            Matrix.RotateAt(z, point);
            g.Transform = Matrix;
            g.DrawImageUnscaled(Rectimage, 50, 50 + move_Y);            if (i % 2 == 0)
            {
                if (movePic) trianglemove_Y += 1;
                PointF pointrotate = new PointF(300, rotate_Y + trianglemove_Y);
                Matrix Matrix2 = new Matrix();
                Matrix2.RotateAt(z, pointrotate);
                g.Transform = Matrix2;
                g.DrawImageUnscaled(Triangleimage, 250, 50 + trianglemove_Y);
            }
            else
            {                PointF pointrotate = new PointF(300, rotate_Y + trianglemove_Y);
                Matrix Matrix2 = new Matrix();
                Matrix2.RotateAt(z, pointrotate);
                g.Transform = Matrix2;                g.DrawImageUnscaled(Triangleimage, 250, 50 + trianglemove_Y);
            }
            if (i % 3 == 0)
            {
                if (movePic) circlemove_Y += 1;                PointF circlepoint = new PointF(500, rotate_Y + circlemove_Y);
                Matrix Matrix3 = new Matrix();
                Matrix3.RotateAt(0, circlepoint);
                g.Transform = Matrix3;                g.DrawImageUnscaled(Circleimage, 450, 50 + circlemove_Y);
            }
            else
            {
                PointF circlepoint = new PointF(500, rotate_Y + circlemove_Y);
                Matrix Matrix3 = new Matrix();
                Matrix3.RotateAt(0, circlepoint);
                g.Transform = Matrix3;                g.DrawImageUnscaled(Circleimage, 450, 50 + circlemove_Y);
            }
            if (movePic)
            {
                move_Y += 1;
                z += 15;
            }
            g.Dispose();
            if (i < 60)
                i++;
            else if (i==60)
                timer1.Enabled = false;//执行60次，不再使用timer
        }
        private void timer1_Tick(object sender, EventArgs e)
        {
            AllPicture(true,null);
        }
    }
}

Answer 5

TO：boblaw
谢谢 回复！
很感谢您的修改与指点。

Answer 6

To：akirya 
谢谢回复！
使用双缓冲区绘制 还不是很明白怎么用
ご返事ありがとうございます。

Answer 7

TO：Microsoft_China_Vip 
谢谢回复！
您说的大概明白了！

Answer 8

protected override void OnPaint(PaintEventArgs e)
        {
            base.OnPaint(e);
            //在需要重绘窗体的时候，绘制图片，以保持形状，但不移动图片位置
              AllPicture(false, e.Graphics);
            e.Graphics.Dispose();
        }
感觉这句话好像没什么用哦
我不做重绘