我下面的这段代码是一个十字屏的一种播放效果，但是，当我一运行程序后，点击Start按纽，它就会一直循环下去，
中间那Stop、Close按纽都点击不了，而且要强行关闭，请各位帮忙看看，小弟不甚感激！
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
namespace waTest
{
/// <summary>
/// Form1 的摘要说明。
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.Button btnClose;
private System.Windows.Forms.Button btnStop;
private System.Windows.Forms.Button btnStart;
private System.Windows.Forms.Timer timer1;
private System.ComponentModel.IContainer components;
public Form1()
{
//
// Windows 窗体设计器支持所必需的
//
InitializeComponent();
//
// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
//
}
/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows 窗体设计器生成的代码
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.components = new System.ComponentModel.Container();
this.btnClose = new System.Windows.Forms.Button();
this.btnStop = new System.Windows.Forms.Button();
this.btnStart = new System.Windows.Forms.Button();
this.timer1 = new System.Windows.Forms.Timer(this.components);
this.SuspendLayout();
//
// btnClose
//
this.btnClose.Location = new System.Drawing.Point(8, 104);
this.btnClose.Name = "btnClose";
this.btnClose.TabIndex = 6;
this.btnClose.Text = "Close";
this.btnClose.Click += new System.EventHandler(this.btnClose_Click);
//
// btnStop
//
this.btnStop.Location = new System.Drawing.Point(8, 56);
this.btnStop.Name = "btnStop";
this.btnStop.TabIndex = 7;
this.btnStop.Text = "Stop";
this.btnStop.Click += new System.EventHandler(this.btnStop_Click);
//
// btnStart
//
this.btnStart.Location = new System.Drawing.Point(8, 8);
this.btnStart.Name = "btnStart";
this.btnStart.TabIndex = 5;
this.btnStart.Text = "Start";
this.btnStart.Click += new System.EventHandler(this.btnStart_Click);
//
// timer1
//
this.timer1.Tick += new System.EventHandler(this.timer1_Tick);
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(520, 477);
this.Controls.Add(this.btnClose);
this.Controls.Add(this.btnStop);
this.Controls.Add(this.btnStart);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false);
}
#endregion
/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
}
private void timer1_Tick(object sender, System.EventArgs e)
{
int width = 10;
int high = 10;
Graphics g = this.CreateGraphics();
System.Drawing.Drawing2D.LinearGradientBrush myBrush = new System.Drawing.Drawing2D.LinearGradientBrush(ClientRectangle,Color.Gray, Color.Gray, System.Drawing.Drawing2D.LinearGradientMode.Vertical);
System.Drawing.Drawing2D.LinearGradientBrush myBrush2 = new System.Drawing.Drawing2D.LinearGradientBrush(ClientRectangle,Color.Red, Color.Red, System.Drawing.Drawing2D.LinearGradientMode.Vertical);
for(int y = 10;y<470;y=y+10)
{
for(int x = 170; x<310;x = x+10)
{
g.FillEllipse(myBrush,x,y,width,high);
g.FillEllipse(myBrush,y,x,width,high);
}
}
System.Threading.Thread.CurrentThread.Join(1000);
for(int y = 460;y>=10;y=y-10)
{
for(int x =300; x>160;x = x-10)
{
g.FillEllipse(myBrush2,x,y,width,high);
g.FillEllipse(myBrush2,y,x,width,high);
}
}
System.Threading.Thread.CurrentThread.Join(1000);
}
private void btnStart_Click(object sender, System.EventArgs e)
{
this.timer1.Start();
}
private void btnStop_Click(object sender, System.EventArgs e)
{
this.timer1.Stop();
}
private void btnClose_Click(object sender, System.EventArgs e)
{
Close();
}
}
}
