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我有一个应用程序使用.net UIAutomation,它最终耗尽内存和崩溃只是监视窗口正在显示和关闭。似乎比C#更容易在VB中显示此内容,但发生的方式都是相同的。它似乎是底层代理对象中的泄漏/池。大多数内存不会被用作.net内存。这是为什么.net UIAutomation应用程序泄漏/共享?
任何想法如何让这个停止泄漏,并仍然监视StructureChangedEvents?
Imports System.Windows.Automation
Public Class Form1
Delegate Sub AddListCallback(ByVal Text As String)
Dim UIAeventHandler As StructureChangedEventHandler
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
BtnStartStop.Text = "Stop"
Subscribe()
End Sub
Private Sub BtnStartStop_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtnStartStop.Click
If "Start" = BtnStartStop.Text Then
BtnStartStop.Text = "Stop"
Subscribe()
Else
BtnStartStop.Text = "Start"
Unsubscribe()
lbEvents.Items.Clear()
GC.GetTotalMemory(True)
End If
End Sub
Public Sub Subscribe()
UIAeventHandler = New StructureChangedEventHandler(AddressOf OnUIAutomationEvent)
Automation.AddStructureChangedEventHandler(AutomationElement.RootElement, TreeScope.Descendants, UIAeventHandler)
End Sub
Public Sub Unsubscribe()
Automation.RemoveStructureChangedEventHandler(AutomationElement.RootElement, UIAeventHandler)
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 StructureChangedEventArgs)
' Make sure the element still exists. Elements such as tooltips can disappear
' before the event is processed.
If e.StructureChangeType = StructureChangeType.ChildrenInvalidated Then
Exit Sub
End If
Dim sourceElement As AutomationElement
Try
sourceElement = DirectCast(src, AutomationElement)
Catch ex As ElementNotAvailableException
Exit Sub
End Try
' TODO Handle any other events that have been subscribed to.
Console.WriteLine("Element : """ & sourceElement.Current.LocalizedControlType & """ """ & sourceElement.Current.Name _
& """ Struct Change Type : " & [Enum].GetName(GetType(StructureChangeType), e.StructureChangeType) _
& " Runtime ID : " & getString(e.GetRuntimeId()))
End Sub
Private Function getString(ByVal ints As Integer()) As String
getString = ""
For Each i As Integer In ints
getString = getString & " " & i.ToString
Next
End Function
End Class
嗯,我希望监听器在应用程序运行期间运行。我尝试了停止并开始多次,以查看它是否释放内存,包括清理处理程序的建议,以便可以通过GC进行清理。尽管不幸的是有些内存被释放,但每次添加事件处理程序后似乎仍会增加1000-2000k。 – 2010-06-30 16:22:26