byval
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byref
Of
Optional
ParamArray
在Visual stdio 工程中寫 public sub AA(
下面自動出現(xiàn)這五個.
你這個默認(rèn)是指自動生成的方法(過程\函數(shù))嗎?
那么默認(rèn)是值傳遞Byval
要是自己寫函數(shù).則無參為默認(rèn)
線程結(jié)束后利用委托生成事件返回,線程應(yīng)用包括傳入和傳出參數(shù)。
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
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 = "測試"
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
新窗體中寫
構(gòu)造函數(shù)
,然后調(diào)用。
比如你要調(diào)用的新窗體是From1.cs這個窗體,
public
Form1(要傳入的參數(shù))
{
//把傳入的參數(shù)傳入窗體中
//執(zhí)行窗體標(biāo)準(zhǔn)內(nèi)容
}
然后在需要調(diào)用的地方調(diào)用
Form1
f
=
new
Form1(傳出的參數(shù));
'--------Form1--------
Dim
f2
As
Form2
Private
Sub
Command1_Click()
Set
f2
=
New
Form2
f2.Show
vbModal
End
Sub
'--------Form1
End--------
'--------Form2--------
Dim
WithEvents
f3
As
Form3
Private
Sub
Command1_Click()
Set
f3
=
New
Form3
f3.Show
End
Sub
Public
Sub
f3_f2W()
Me.Command1.Caption
=
"f2W"
End
Sub
'--------Form2
End--------
'--------Form3--------
Public
Event
f2W()
Private
Sub
Command1_Click()
RaiseEvent
f2W
End
Sub
'--------Form3
End--------
f.Show();
如此就能實現(xiàn)調(diào)用了。
網(wǎng)頁名稱:vb.net傳遞參數(shù) vb過程參數(shù)傳遞方式
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