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  • C#BackgroundWorker组件

    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 ProgessBarTest
    {
        public partial class Form1 : Form
        {
            public Form1()
            {
                InitializeComponent();
            }
    
            private void button1_Click(object sender, EventArgs e)
            {
                this.btn_Calculate.Enabled = false;//设置计算按键不可用
                this.tb_result.Text = string.Empty;//清空文本框内容
                this.btn_cancel.Enabled = true; //设置取消按键可用
                this.progressBar1.Value = 0;
    
                //启动后台线程,实例化一个CalcInput对象传给新线程
                backgroundWorker1.RunWorkerAsync(
                                                new CalcInput(
                                                                int.Parse(this.tb_x.Text),
                                                                int.Parse(this.tb_y.Text)
                                                                )
                                                );
            }
    
            private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
            {
                //从DoWorkEventArgs类型参数e的Argument属性得到传入的对象实例
                CalcInput input = (CalcInput)e.Argument;
                //模拟执行时间
                for (int i = 0; i < 10; i++)
                {
                    input.x += input.y;
                    Thread.Sleep(300);
                    if(backgroundWorker1.CancellationPending)
                    {
                        e.Cancel = true;
                        return;
                    }
                }
    
                //将计算结果交给参数e的Result属性
                e.Result = input.x;
            }
    
            private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
            {
                this.btn_Calculate.Enabled = true;//设置计算按键不可用
    
                if (e.Cancelled)
                {
                    this.tb_result.Text = "计算中断";
                }
                else
                {
                    this.tb_result.Text = e.Result.ToString();
                }
    
                this.btn_cancel.Enabled = false; 
                this.progressBar1.Value = 100;
    
                
            }
    
            private void btn_cancel_Click(object sender, EventArgs e)
            {
                backgroundWorker1.CancelAsync();
            }
    
        }
    }

    1
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  • 原文地址:https://www.cnblogs.com/Mysterious/p/3429685.html
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