最近做了一套MES集成系统，由上料到成品使自动化运行，其中生产过程是逐步的，但是每一个动作都需要独立的线程进行数据监听，那么就需要实现线程等待。
代码：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms; namespace Forms
{
public partial class Form2 : Form
{
public Form2()
{
InitializeComponent();
} CountdownEvent latch ;
private void refreshData(CountdownEvent latch)
{
latch.Signal();
} delegate void UpdateText(Control control, string text);
UpdateText color = delegate (Control control, string text)
{
control.Text = text;
}; private void button1_Click(object sender, EventArgs e)
{
Thread th = new Thread(ProcessMain);
th.IsBackground = true;
th.Start();
} /// <summary>
/// 主线程函数
/// </summary>
void ProcessMain()
{
Process("");
Process("");
Process("");
MessageBox.Show("全部执行完毕");
} /// <summary>
/// 动作
/// </summary>
void Process(string value)
{
latch = new CountdownEvent();
Thread thread = new Thread(() => {
bool flag = true;
int i = ;
while (flag)
{
if (i > )
{
flag = false;
}
i++;
Thread.Sleep();
}
refreshData(latch);
});
thread.Start();
latch.Wait();
this.Invoke(color, new object[] { textBox1, value });
}
}
}
多个线程全部执行完毕后再调用方法：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms; namespace ExecutionCourseSystem
{
public partial class Form3 : Form
{
public Form3()
{
InitializeComponent();
} CountdownEvent latch = new CountdownEvent();
private void Form3_Load(object sender, EventArgs e)
{ } private void button1_Click(object sender, EventArgs e)
{
Thread thread = new Thread(() => refreshData());
thread.Start();
thread = new Thread(() => refreshData());
thread.Start();
thread = new Thread(() => refreshData());
thread.Start();
thread = new Thread(() => refreshData());
thread.Start();
thread = new Thread(() => refreshData());
thread.Start();
latch.Wait();
MessageBox.Show("线程全部执行完毕");
}
private void refreshData()
{
latch.Signal();
}
}
}