本文整理汇总了VB.NET中System.Windows.Automation.AutomationEventHandler代理的典型用法代码示例。如果您正苦于以下问题：VB.NET AutomationEventHandler代理的具体用法？VB.NET AutomationEventHandler怎么用？VB.NET AutomationEventHandler使用的例子？那么恭喜您, 这里精选的代理代码示例或许可以为您提供帮助。
在下文中一共展示了AutomationEventHandler代理的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的VB.NET代码示例。
示例1: SubscribeToInvoke
' Member variables.
Private ElementSubscribeButton As AutomationElement
Private UIAeventHandler As AutomationEventHandler
''' <summary>
''' Register an event handler for InvokedEvent on the specified element.
''' </summary>
''' <param name="elementButton">The automation element.</param>
Public Sub SubscribeToInvoke(ByVal elementButton As AutomationElement)
If (elementButton IsNot Nothing) Then
UIAeventHandler = New AutomationEventHandler(AddressOf OnUIAutomationEvent)
Automation.AddAutomationEventHandler(InvokePattern.InvokedEvent, elementButton, _
TreeScope.Element, UIAeventHandler)
ElementSubscribeButton = elementButton
End If
End Sub
''' <summary>
''' AutomationEventHandler delegate.
''' </summary>
''' <param name="src">Object that raised the event.</param>
''' <param name="e">Event arguments.</param>
Private Sub OnUIAutomationEvent(ByVal src As Object, ByVal e As AutomationEventArgs)
' Make sure the element still exists. Elements such as tooltips can disappear
' before the event is processed.
Dim sourceElement As AutomationElement
Try
sourceElement = DirectCast(src, AutomationElement)
Catch ex As ElementNotAvailableException
Exit Sub
End Try
If e.EventId Is InvokePattern.InvokedEvent Then
' TODO Add handling code.
Else
End If
' TODO Handle any other events that have been subscribed to.
Console.WriteLine("Event: " & e.EventId.ProgrammaticName)
End Sub
Private Sub ShutdownUIA()
If (UIAeventHandler IsNot Nothing) Then
Automation.RemoveAutomationEventHandler(InvokePattern.InvokedEvent, ElementSubscribeButton, UIAeventHandler)
End If
End Sub