using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Threading;
namespace Demo0004
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
//线程开始的时候调用的委托
private delegate void maxValueDelegate(int maxValue);
//线程执行中调用的委托
private delegate void nowValueDelegate(int nowValue);
private void button1_Click(object sender, EventArgs e)
{
ThreadMethod method = new ThreadMethod();
//先订阅一下事件
method.threadStartEvent += new EventHandler(method_threadStartEvent);
method.threadEvent += new EventHandler(method_threadEvent);
method.threadEndEvent += new EventHandler(method_threadEndEvent);
Thread thread = new Thread(new ThreadStart(method.runMethod));
thread.Start();
}
/// <summary>
/// 线程开始事件,设置进度条最大值
/// 但是我不能直接操作进度条,需要一个委托来替我完成
/// </summary>
/// <param name="sender">ThreadMethod函数中传过来的最大值</param>
/// <param name="e"></param>
void method_threadStartEvent(object sender, EventArgs e)
{
int maxValue = Convert.ToInt32(sender);
maxValueDelegate max = new maxValueDelegate(setMax);
this.Invoke(max, maxValue);
}
/// <summary>
/// 线程执行中的事件,设置进度条当前进度
/// 但是我不能直接操作进度条,需要一个委托来替我完成
/// </summary>
/// <param name="sender">ThreadMethod函数中传过来的当前值</param>
/// <param name="e"></param>
void method_threadEvent(object sender, EventArgs e)
{
int nowValue = Convert.ToInt32(sender);
nowValueDelegate now = new nowValueDelegate(setNow);
this.Invoke(now, nowValue);
}
/// <summary>
/// 线程完成事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void method_threadEndEvent(object sender, EventArgs e)
{
MessageBox.Show("执行已经完成!");
}
/// <summary>
/// 我被委托调用,专门设置进度条最大值的
/// </summary>
/// <param name="maxValue"></param>
private void setMax(int maxValue)
{
this.progressBar1.Maximum = maxValue;
}
/// <summary>
/// 我被委托调用,专门设置进度条当前值的
/// </summary>
/// <param name="nowValue"></param>
private void setNow(int nowValue)
{
this.progressBar1.Value = nowValue;
}
}
public class ThreadMethod
{
/// <summary>
/// 线程开始事件
/// </summary>
public event EventHandler threadStartEvent;
/// <summary>
/// 线程执行时事件
/// </summary>
public event EventHandler threadEvent;
/// <summary>
/// 线程结束事件
/// </summary>
public event EventHandler threadEndEvent;
public void runMethod()
{
int count = 100; //执行多少次
threadStartEvent.Invoke(count, new EventArgs());//通知主界面,我开始了,count用来设置进度条的最大值
for (int i = 0; i < count; i++)
{
Thread.Sleep(100);//休息100毫秒,模拟执行大数据量操作
threadEvent.Invoke(i, new EventArgs());//通知主界面我正在执行,i表示进度条当前进度
}
threadEndEvent.Invoke(new object(), new EventArgs());//通知主界面我已经完成了
}
}
}
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Threading;
namespace Demo0004
{
public partial class Form2 : Form
{
//在下载窗体上面 建一个委托
public delegate void ChangeProgress(int value); //进度条
public delegate void ChangeButton(int value); //按钮
//创建上面的委托的变量
public ChangeProgress changeProgerss;
public ChangeButton changebtn;
public Form2()
{
InitializeComponent();
//为这个委托变量赋值
changeProgerss = FunChangeProgress;
changebtn = FunChangebutton;
}
//通过创建工作线程消除用户界面线程的阻塞问题
private void button1_Click(object sender, EventArgs e)
{
button1.Enabled = false;
//新创建一个线程
System.Threading.Thread thr = new System.Threading.Thread(new System.Threading.ParameterizedThreadStart(Download));
thr.Start();
}
//线程方法 一定要是object 类型参数 同时返回值是void
private void Download(object obj)
{
for (int i = 0; i <= 100; i++)
{
//执行委托 更新按钮 -重点
this.button1.Invoke(changebtn, i);
//执行委托 更新进度条 -重点
this.progressBar1.Invoke(changeProgerss, i);
System.Threading.Thread.Sleep(100);
}
}
//更新进度条
public void FunChangeProgress(int value)
{
progressBar1.Value = value;
}
//更新按钮
public void FunChangebutton(int value)
{
if (value == 100)
{
button1.Text = "开始新进程";
button1.Enabled = true;
}
else
{
//相除保留两位小数 且四舍五入 Math.Round(1.00 * value / 100, 2,MidpointRounding.AwayFromZero)
button1.Text = Math.Round(1.00 * value / 100, 2,MidpointRounding.AwayFromZero) * 100 + "%";
}
}
//窗体关闭 强制退出 销毁所有相关进程
private void Form2_FormClosing(object sender, FormClosingEventArgs e)
{
//强制退出 销毁进程
System.Environment.Exit(System.Environment.ExitCode);
this.Dispose();
this.Close();
}
}
}
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace Demo0004
{
public partial class Form3 : Form
{
public delegate void ChangeStatus();
//创建上面的委托的变量
public ChangeStatus changestatus;
public Form3()
{
InitializeComponent();
}
private void Form3_Load(object sender, EventArgs e)
{
//使用Timer组件实现多线程定时同步
System.Timers.Timer t = new System.Timers.Timer(3000); //实例化Timer类，设置间隔时间单位毫秒；
t.Elapsed += new System.Timers.ElapsedEventHandler(UpdateWork); //到达时间的时候执行事件；
t.AutoReset = true; //设置是执行一次（false）还是一直执行(true)；
t.Enabled = true; //是否执行System.Timers.Timer.Elapsed事件；
changestatus = FunChangeStatus;
}
private void UpdateWork(object source, System.Timers.ElapsedEventArgs e)
{
this.Invoke(changestatus);
}
//更新
public void FunChangeStatus()
{
#region 更新开始
//更新方法
#endregion
lbtimer.Text = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss") + " 数据更新成功";
}
}
}
