开源网站源码下载,wordpress 分页制作,网站建设的方案模板下载,wordpress 添加自定义栏目面板上位机开发中一定会用到的技术就是 设备的线程开始运行执行生产流程#xff0c;在生产过程中会有要打开安全门或暂停设备动作#xff0c;人为去排除设备小问题的时就要用到暂停功能#xff0c;问题排除后设备继续运行#xff0c;生产完成后设备停止。 这些操作是上位机开发… 上位机开发中一定会用到的技术就是 设备的线程开始运行执行生产流程在生产过程中会有要打开安全门或暂停设备动作人为去排除设备小问题的时就要用到暂停功能问题排除后设备继续运行生产完成后设备停止。 这些操作是上位机开发中必须要实现的功能。下面是一个简单的示例。 1.界面 2.代码
2.1主要用到的对象
//线程源
private CancellationTokenSource cts new CancellationTokenSource();
//手动停止事件对象
private ManualResetEvent resetEvent new ManualResetEvent(true);
//线程
private Task task;
2.2 开始
/// summary
/// 开 始
/// /summary
/// param namesender/param
/// param namee/param
private void btnStart_Click(object sender, EventArgs e)
{if (cts.IsCancellationRequested){cts new CancellationTokenSource();}resetEvent.Set();task Task.Factory.StartNew(() {int count 1;Color clrInfo Color.Blue;while (!cts.IsCancellationRequested){resetEvent.WaitOne();//阻止当前线程var strInfo 运行日志[ count ];AddListViewThread(null, strInfo, clrInfo);count;Thread.Sleep(1000);}});
}
2.3 暂 停
/// summary
/// 暂 停
/// /summary
/// param namesender/param
/// param namee/param
private void btnPause_Click(object sender, EventArgs e)
{resetEvent.Reset();
}
2.4继 续
/// summary
/// 继 续
/// /summary
/// param namesender/param
/// param namee/param
private void btnContinue_Click(object sender, EventArgs e)
{resetEvent.Set();
}
2.5停 止
/// summary
/// 停 止
/// /summary
/// param namesender/param
/// param namee/param
private void btnStop_Click(object sender, EventArgs e)
{cts.Cancel();
}
全部代码
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Dynamic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;namespace TaskWindowsFormsApp
{public partial class Form1 : Form{public Form1(){InitializeComponent();}delegate void AddListViewCallback(string strTime, string strContent, Color textColor);//线程源private CancellationTokenSource cts new CancellationTokenSource();//手动停止事件对象private ManualResetEvent resetEvent new ManualResetEvent(true);//线程private Task task;/// summary/// 开 始/// /summary/// param namesender/param/// param namee/paramprivate void btnStart_Click(object sender, EventArgs e){if (cts.IsCancellationRequested){cts new CancellationTokenSource();}resetEvent.Set();task Task.Factory.StartNew(() {int count 1;Color clrInfo Color.Blue;while (!cts.IsCancellationRequested){resetEvent.WaitOne();//阻止当前线程var strInfo 运行日志[ count ];AddListViewThread(null, strInfo, clrInfo);count;Thread.Sleep(1000);}});}/// summary/// 暂 停/// /summary/// param namesender/param/// param namee/paramprivate void btnPause_Click(object sender, EventArgs e){resetEvent.Reset();}/// summary/// 继 续/// /summary/// param namesender/param/// param namee/paramprivate void btnContinue_Click(object sender, EventArgs e){resetEvent.Set();}/// summary/// 显示添加日志/// /summary/// param namestrTime时间/param/// param namestrContent内裤/param/// param nametextColor颜色/parampublic void AddListViewThread(string strTime, string strContent, Color textColor){if (this.IsDisposed){return;}if (this.listViewWorkLogs.InvokeRequired){//获取一个值该值指示调用方在对控件进行方法调用时是否必须调用 Invoke 方法因为调用方位于创建控件所在的线程以外的线程中AddListViewCallback d new AddListViewCallback(AddListViewThread);this.Invoke(d, new object[] { strTime, strContent, textColor });}else{AddContent2ListView(strTime, strContent, textColor);}}/// summary/// 显示添加日志/// /summary/// param namestrTime时间/param/// param namestrContent内裤/param/// param nametextColor颜色/parampublic void AddContent2ListView(string strTime, string strContent, Color textColor){try{if (strTime null){strTime string.Format({0}:{1}:{2}, DateTime.Now.Hour, DateTime.Now.Minute, DateTime.Now.Second);}int nCount listViewWorkLogs.Items.Count;if (nCount 600){for (int i nCount - 1; i 100; i--){listViewWorkLogs.Items.RemoveAt(i);}}}catch{int nCount listViewWorkLogs.Items.Count;if (nCount 600){listViewWorkLogs.Clear();}}ListViewItem lvItem new ListViewItem();lvItem.ForeColor textColor;lvItem.Text strTime;lvItem.StateImageIndex 0;lvItem.SubItems.Add(strContent);this.listViewWorkLogs.Items.Insert(0, lvItem);}/// summary/// 停 止/// /summary/// param namesender/param/// param namee/paramprivate void btnStop_Click(object sender, EventArgs e){cts.Cancel();}}
}
