我最近将 2007 年的 Access 文件转换（导出/导入）到 2010 年。除了一种形式外，一切正常。我不断收到错误：
编译错误：未定义用户定义类型
我尝试将“Microsoft ActiveX Data Objects 2.8”添加到我的引用中，但问题仍然存在。 Sub ClearTreeView(tvwTree As TreeView)是 Access 突出显示的问题。
Option Compare Database
Option Explicit
' Clears all nodes on a treeview control
Sub ClearTreeView(tvwTree As TreeView) 'what Access highlighted as the issue
On Error GoTo EH
tvwTree.Nodes.Clear
Exit Sub
EH:
MsgBox "Error " & Err.Number & ": " & Err.Description
End Sub
' Calls functions to clear and populate a treeview control
' Parameters:
' strForm Name of the form
' strTV TreeView control name
' strSourceName Name of the table or query containing the data used to populate the treeview
' strChildField ID field for the child records
' strParentField Parent ID Field
' strTextField Field containing text that will be used as node labels
'
Sub FillTreeView(tvwTree As Object, strSourceName As String, strChildField As String, strParentField As String, strTextField As String)
Dim strSQL As String
Dim rs As DAO.Recordset
On Error GoTo EH
' Open the recordset using table and fields specified in Sub parameters
strSQL = "SELECT " & strChildField & ", " & strParentField & ", " & strTextField & " FROM " & strSourceName
Set rs = CurrentDb.OpenRecordset(strSQL, dbOpenDynaset)
' Clear any existing data out of the treeview
ClearTreeView tvwTree
' Call recursive function to fill in treeview
AddTreeData tvwTree, rs, strChildField, strParentField, strTextField
' Close the recordset
rs.Close
Set rs = Nothing
Exit Sub
EH:
MsgBox "Error " & Err.Number & ": " & Err.Description
End Sub
' Recursive function to populate a treeview control
' Parameters:
' strFormName Name of the form
' strTreeViewName TreeView control name
' rs Recordset containing the data used to populate the treeview
' strChildField ID field for the child records
' strParentField Parent ID Field
' strTextField Field containing text that will be used as node labels
' varParentID Optional parameter that only gets passed for recursive calls to this function. Specifies the ID of the current record to be used as a
' ParentID when searching the recordset for "grand-children", etc.
Sub AddTreeData(objTV As TreeView, rs As DAO.Recordset, strChildField As String, strParentField As String, strTextField As String, Optional varParentID As Variant)
Dim nodChild As Node
Dim nodParent As Node
Dim strLabel As String
Dim strNodeID As String
Dim strCriteria As String
Dim strBookmark As String
On Error GoTo EH
' Test for a circular reference
If rs(strChildField) = rs(strParentField) Then GoTo EH_CircularReference
' If the optional parameter is missing, then this is the first(non-recursive) call to this function.
' Set the critieria to look for a parent id of 0.
If IsMissing(varParentID) Then
strCriteria = strParentField & " = 0 "
Else
' Otherwise, extract the childID portion of the node ID, which was passed as an optional parameter.
strCriteria = strParentField & " = " & Mid(varParentID, InStr(1, varParentID, "C") + 1)
' Define the parent node
Set nodParent = objTV.Nodes("node" & varParentID)
End If
' Look for records having the specified "parent"
rs.FindFirst strCriteria
Do Until rs.NoMatch
' Read node caption from the text field
strLabel = rs(strTextField)
' Create a new node ID in the format ParentID &"C" & ChildID (eg: 4C12)
strNodeID = "node" & rs(strParentField) & "C" & rs(strChildField)
' If optional parameter is missing (first call to this function)...
If Not IsMissing(varParentID) Then
'add new node to the next higher node for this record
Set nodChild = objTV.Nodes.Add(nodParent, tvwChild, strNodeID, strLabel)
Else
' Otherwise, add new node to the top level of the tree
Set nodChild = objTV.Nodes.Add(, , strNodeID, strLabel)
End If
' Bookmark our place in the recordset so that we can resume the search from the same point after the recursive call to this function.
strBookmark = rs.Bookmark
' call this function recursively for "children"
AddTreeData objTV, rs, strChildField, strParentField, strTextField, rs(strParentField) & "C" & rs(strChildField)
' Return to bookmared place in the recordset
rs.Bookmark = strBookmark
' Find the next record having the same parentID
rs.FindNext strCriteria
Loop
Exit Sub
EH_CircularReference:
MsgBox "Exiting because of a circular reference in which a child record was determined to be it's own parent."
Exit Sub
EH:
MsgBox "Error " & Err.Number & ": " & Err.Description
End Sub