VB.NET并行与分布式编程(2)-线程终止

最新推荐文章于 2021-09-12 08:22:04 发布

最新推荐文章于 2021-09-12 08:22:04 发布 · 218 阅读

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本文通过VB.NET演示了如何创建并执行多个线程，并在其中一个线程遇到除以零异常时进行异常处理并终止该线程。代码示例中包含了线程的创建、启动、同步等待及异常捕获等关键步骤。


 Imports System
Imports System.Threading


Module Module1

    Sub Main()

        Dim mythread1 As Thread
        Dim mythread2 As Thread
        Dim mythread3 As Thread
        '创建线程对象
        mythread1 = New Thread(AddressOf mythreadrun)
        mythread2 = New Thread(AddressOf mythreadrun)
        mythread3 = New Thread(AddressOf mythreadrun)
        Console.WriteLine(Now.ToLongTimeString & "线程对象创建完毕,开始执行线程")

        '执行线程
        mythread1.Start("线程1")
        mythread2.Start("线程2")
        mythread3.Start("线程3")
        '等待线程完成
        mythread1.Join()
        mythread2.Join()
        mythread3.Join()
        '线程执行完毕
        Console.WriteLine(Now.ToLongTimeString & "线程执行完毕!")
    End Sub
    Public Sub mythreadrun(ByVal data As Object)
        Dim mynum As Integer
        Dim jg As Integer
        mynum = 20
        Try
            For mynum = 20 To -20 Step -1
                jg = 1000 / mynum
                Console.WriteLine(data & ":" & Now.ToLongTimeString & "，1000 / " & mynum & "计算结果为：" & jg)
                Thread.Sleep(1)
            Next
        Catch
            Console.WriteLine(data & ":" & Now.ToLongTimeString & "线程异常终止!")
            '终止线程
            Thread.CurrentThread.Abort()
        End Try
    End Sub
End Module

在线程中计算1000/mynum的值，其中mynum从20开始递减，到0时会出现除0异常，调用Thread.CurrentThread.Abort()
完成终止线程的操作

        Try
            For mynum = 20 To -20 Step -1
                jg = 1000 / mynum
                Console.WriteLine(data & ":" & Now.ToLongTimeString & "，1000 / " & mynum & "计算结果为：" & jg)
                Thread.Sleep(1)
            Next
        Catch
            Console.WriteLine(data & ":" & Now.ToLongTimeString & "线程异常终止!")
            '终止线程
            Thread.CurrentThread.Abort()
        End Try