VBA 与 Microsoft Access - 检查对象是否存在
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VBA With Microsoft Access - Check if object exists
提问by JMK
I'm using VBA with Microsoft Access.
我在 Microsoft Access 中使用 VBA。
I'm setting an object to an item inside a WebBrowserControl that sometimes exists, sometimes doesn't.
我正在为 WebBrowserControl 中的项目设置一个对象，该对象有时存在，有时不存在。
Dim myWebBrowser As Object
Dim myItemInsideWebpage As Object
Set myWebBrowser = Me.WebBrowser0.Object
Set myItemInsideWebpage = myWebBrowser.Document.GetElemendById("myDiv")
If 'myDiv' exists, awesome, if not I want Access to let me know so I can deal with it.
如果“myDiv”存在，那就太棒了，如果不存在，我希望 Access 让我知道，以便我可以处理它。
回答by JimmyPena
I believe it would be something like
我相信它会是这样的
If myItemInsideWebpage Is Nothing Then
' doesn't exist
Else
' does exist
End If
You may need to preface your 'Set' statement with 'On Error Resume Next' in case an error is thrown when 'myDiv' does not exist.
如果在“myDiv”不存在时抛出错误，您可能需要在“Set”语句前加上“On Error Resume Next”。
