vb.net线程参数 vb多线程实例 _线程

vb.net多线程如何返回参数，举个例子，谢谢Public Class Form1
Public Class SquareClass '把多线程调用vb.net线程参数的函数封装到类中vb.net线程参数，通过类事件返回
Public Value As Double
Public Square As Double
Public Event ThreadComplete(ByVal Square As Double)
Public Sub CalcSquare()
Square = Value * Value
RaiseEvent ThreadComplete(Square)
End Sub
End Class
Dim WithEvents oSquare As SquareClass
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click '多线程返回值测试vb.net线程参数，当线程运行完成激发事件
oSquare = New SquareClass()
Dim t As New Threading.Thread(AddressOf oSquare.CalcSquare)
oSquare.Value = https://www.04ip.com/post/30
t.Start()
End Sub
Sub SquareEventHandler(ByVal Square As Double) Handles oSquare.ThreadComplete '响应事件函数
MsgBox("The square is "Square)
End Sub
End Class
VB.NET线程内调用带参数的方法异常报错信息是什么vb.net线程参数？截图一下。
---------补充----------------
vb.net线程参数你这报错与线程应该关系不大吧vb.net线程参数，是调用COM不熟悉造成的vb.net线程参数，在项目属性里面有些相关配置你研究研究。
vb.net 如何传递类参数线程结束后利用委托生成事件返回，线程应用包括传入和传出参数。
Public Delegate Sub ThreadCallback(value As ThreadResult)
Public Class Form1
Private WithEvents _th_1 As Thread_1
Protected Overrides Sub OnLoad(e As System.EventArgs)
Dim value As ThreadObject
value.Index = 1
Me._th_1 = New Thread_1(Me)
Me._th_1.Run(value)
MyBase.OnLoad(e)
End Sub
Private Sub Thread_1_End(sender As Object, e As ThreadEventArgs) Handles _th_1.ThreadEnd
Me.TextBox1.Text = e.Result.Text
End Sub
End Class
Public Class Thread_1
【vb.net线程参数 vb多线程实例】Public Event ThreadEnd(sender As Object, e As ThreadEventArgs)
Private _control As Control
Sub New(control As Control)
Me._control = control
End Sub
Public Sub Run(value As Object)
Dim th As New Threading.Thread(AddressOf ThreadProc)
th.Start(value)
End Sub
Private Sub ThreadProc(obj As Object)
Dim value As ThreadObject = CType(obj, ThreadObject)
Dim result As ThreadResult = Nothing
If value.Index = 1 Then result.Text = "测试"
Dim callback As New ThreadCallback(AddressOf ThreadInvoke)
_control.Invoke(callback, result)
End Sub
Private Sub ThreadInvoke(value As ThreadResult)
RaiseEvent ThreadEnd(Me, New ThreadEventArgs(value))
End Sub
End Class
Public Structure ThreadObject
Public Index As Integer
'Public Rect As Rectangle
End Structure
Public Structure ThreadResult
Public Text As String
'Public Rect As Rectangle
End Structure
Public Class ThreadEventArgs
Inherits System.EventArgs
Private _result As ThreadResult
Public ReadOnly Property Result As ThreadResult
Get
Return _result
End Get
End Property
Sub New(value As ThreadResult)
Me._result = value
End Sub
End Class
Vb.net 怎样操作有参数的多线程而且还是循环的。Sub Main()
Dim thr As New Thread(AddressOf 循环)
thr.Start("a")
End Sub
Sub 循环(a() As String)
'这里随vb.net线程参数你干什么循环也行
For Each i As String In a
MsgBox(i)
Next
End Sub
看懂vb.net线程参数了吧参数只能有一个也可以不是数组vb.net线程参数，在a() As Stringvb.net线程参数的a后面去掉括号就行
VB.NET 在线程如何返回Function的值？Thread不会返回值的。你应该创建委托的，使用委托的异步方法
Dim funcInt32 As Func(Of String, Integer) = AddressOf GetList
Dim s As IAsyncResult = funcInt32.BeginInvoke("(参数)", Nothing, Nothing)
’在要获得结果的地方调用EndInvoke方法结束异步调用并获得结果。
Dim result As Int32 = funcInt32.EndInvoke(s)
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vb.net线程参数 vb多线程实例

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