vb.net 灵活注册事件，达到可以有条件调用事件的目的

Public Class Form1
Private Sub Form1_Load(sender As Object,e As EventArgs) Handles Me.Load
AddHandler Button1.Click,AddressOf Dosomething
End Sub
Private Sub Dosomething(sender As Object,e As EventArgs)
MsgBox("hell")
End Sub
Private Sub Button1_Click(sender As Object,e As EventArgs) Handles Button1.Click
Dim obj As New clsCAL
obj.A = 1
obj.B = 5
MsgBox(obj.C)

obj.A = 2
MsgBox(obj.C)
End Sub
End Class

1 AddHandler Button1.Click,AddressOf Dosomething 这行代码的含义是，当完成了Button1的单击后，自动调用Dosomething函数。由于注册事件的代码是在窗体加载的过程中完成的，所以就达到了有条件调用事件的响应代码的目的

2 Button1单击后，事件的调用顺序为 Button1_Click(-----> Dosomething

（编辑：李大同）

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