VB.net Thread 執行序

 引用來源:VB.net Thread執行序簡單應用

建立一個Class用來執行新的Thread:

Imports System.Threading

Namespace Classes

Public Class Worker

Delegate Sub WorkerDelegate(ByVal Params As Object)

Private m_Thread As Thread = Nothing

Private m_Controler As Control = Nothing

Private m_Params As Object = Nothing

Public Event WorkerToDo(ByRef Params As Object)

Public Event WorkerInvoke(ByVal Params As Object)

Dim CallBackInvoke As New WorkerDelegate(AddressOf Worker_Invoke)

Public Sub New(ByVal ctrl As Control)

m_Controler = ctrl

End Sub

Public Sub Start()

Dim ThreadBegin As New ThreadStart(AddressOf Worker_ToDo)

Me.m_Thread = New Thread(ThreadBegin)

Me.m_Thread.IsBackground = True

Me.m_Thread.Name = "WorkerThread" + Now.ToShortTimeString()

Me.m_Thread.Start()

End Sub

Private Sub Worker_ToDo()

RaiseEvent WorkerToDo(m_Params)

m_Controler.Invoke(CallBackInvoke, m_Params)

End Sub

Private Sub Worker_Invoke(ByVal Params As Object)

RaiseEvent WorkerInvoke(Params)

End Sub

End Class

End Namespace

使用方式:

Private Sub LoadData()

Dim wk As New Worker(Me)

Try

'連結要丟到背景工作的副程式

AddHandler wk.WorkerToDo, AddressOf DoQueryDataBase

'工作完畢後, 所要處理資料(與UI互動)

AddHandler wk.WorkerInvoke, AddressOf BindData

wk.Start()

Finally

wk = Nothing

End Try

End Sub

Private Sub DoQueryDataBase(ByRef Params As Object)

'執行的程式, 結果可由 Params 代傳

'1: Params = modADO.Query(...)

'2: Params = New Object() {data1, data2, ...}

End Sub

Private Sub BindData(ByVal Params As Object)

'背景工作完畢後, 與 UI 互動

TextBox1.Text = CInt(Params)

End Sub