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vb.net自定义事件

2018-01-28 11:29 330 查看
1、先定义事件:Event

Event ConnectComplete(ByVal Result As Boolean, ByVal Reason As String)


2、触发事件:RaiseEvent

RaiseEvent ConnectComplete(False, "ConnectThread()异常:" + vbCr & vbLf + ex.ToString())


3、以withEvents关键字声明事件对象变量(RobotCoreDriver是事件所在类):

Private WithEvents mRobotControlDriver As RobotCoreDriver = new RobotCoreDriver;


4、收到事件:

Private Sub mRobotControlDriver_ConnectComplete(Result As Boolean, Reason As String) Handles mRobotControlDriver.ConnectComplete
MessageBox.Show("收到事件")
End Sub


demo:

Public Class RobotCoreDriver
Event ConnectComplete(ByVal Result As Boolean, ByVal Reason As String)
Sub Demo()
RaiseEvent ConnectComplete(False, "ConnectThread()异常:" + vbCr & vbLf + ex.ToString())
End Sub
End Class

Public Class Test
Private WithEvents mRobotControlDriver As RobotCoreDriver = new RobotCoreDriver;
mRobotControlDriver.Demo()
End Class
Private Sub mRobotControlDriver_ConnectComplete(Result As Boolean, Reason As String) Handles mRobotControlDriver.ConnectComp
4000
lete
MessageBox.Show("收到事件")
End Sub
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