测试一个属性名是否存在

Question

我收到此错误：

需要运行时错误“424”对象

当我尝试运行这段代码时：

Sub SuperSaveAs()
Set objFSO = CreateObject("Scripting.FileSystemObject")
Dim pathName As String
Dim myFileName As String

If (ActiveDocument.CustomDocumentProperties("_CheckOutSrcUrl").Value = True) Then
    pathName = ActiveDocument.CustomDocumentProperties("_CheckOutSrcUrl").Value
    myFileName = pathName + ActiveWorkbook.Name
        ActiveWorkbook.SaveAs Filename:= _
            myFileName _
            , FileFormat:=xlOpenXMLWorkbookMacroEnabled, CreateBackup:=False
Else
    MsgBox "_CheckOutSrcUrl is missing"
End If

End Sub

此宏与 Excel 中的一个按钮相关联。宏检查自定义文档属性是否存在。如果自定义文档属性存在，则宏应将文件保存到值 _CheckOutSrcUrl（SharePoint 目录）。 我该如何解决这个错误？

Answer 1

您不能使用上述方法来测试属性名称是否存在。有两种明显的方法，这些不是我个人的答案：

1. 使用循环检查所有属性名称并查看是否找到“_CheckOutSrcUrl”。见https://answers.microsoft.com/en-us/office/forum/office_2007-word/using-customdocumentproperties-with-vba/91ef15eb-b089-4c9b-a8a7-1685d073fb9f

2. 使用 VBA 错误检测来查看属性“_CheckOutSrcUrl”是否存在。见http://www.vbaexpress.com/forum/showthread.php?15366-Solved-CustomDocumentProperties-Problem

#1 的 sn-p 示例适用于您的代码 - 最好在函数中：

Dim propertyExists As Boolean
Dim prop As DocumentProperty
propertyExists = False
For Each prop In ActiveDocument.CustomDocumentProperties
    If prop.Name = "_CheckOutSrcUrl" Then
        propertyExists = True
        Exit For
    End If
Next prop

#2 的 sn-p 示例适用于您的代码：

Dim propertyExists As Boolean
Dim tempObj
On Error Resume Next
Set tempObj = ActiveDocument.CustomDocumentProperties.Item("_CheckOutSrcUrl")
propertyExists = (Err = 0)
On Error Goto 0

Answer 2

基于@Cyber​​mike：

Function propertyExists(propName) As Boolean

    Dim tempObj
    On Error Resume Next
    Set tempObj = ActiveDocument.CustomDocumentProperties.Item(propName)
    propertyExists = (Err = 0)
    On Error GoTo 0

End Function