使用 BackgroundWorker 实现异步调用

在 WinForm 中，如果有一个耗时的操作，那么 UI 将有一种 【卡死】的感觉，解决方法是用多线程去处理那个耗时的操作。如果你不想用多线程，可以用 WinForm 中的 BackgroundWorker 来实现异步调用。

废话不多说了，直接贴代码（测试通过！）：

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 BackGroundWorkerTestWinUI
{
public struct AddParams
{
public AddParams(double num1, double num2)
{
this.Num1 = num1;
this.Num2 = num2;
}

public double Num1;

public double Num2;
}

public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void btnCalculate_Click(object sender, EventArgs e)
{
try
{
double num1 = double.Parse(this.txtNum1.Text);
double num2 = double.Parse(this.txtNum2.Text);
AddParams addParam = new AddParams(num1, num2);
backgroundWorker1.RunWorkerAsync(addParam);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}

private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
AddParams addParam = (AddParams)e.Argument;
System.Threading.Thread.Sleep(5000); // 模拟一个好使操作
e.Result = addParam.Num1 + addParam.Num2;
}

private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
MessageBox.Show(e.Result.ToString());
}
}
}

谢谢浏览！