I Am Having Trouble With Recursively Viewing The Treeview Control
Mar 28, 2005
Reference: http://support.microsoft.com/Default.aspx?kbid=209891
Hi I am trying to create a treeview based on a table that I created. I am trying to create a treeview that fills the treeview recursively but for some reason I am only able to see the parent node and not the children
Here are the specs that I have so far
I have a table called "tblTreeview"
I have tree fields
"txtID"
"txtNode"
"txtRelationship"
I also have a form called "frmTreeview"
I named my treeview control "axtreeview"
here is the code that I copied off the link that I referenced at the beginning of this thread.
The only thing that is different is the name of the fields.
'--Beginning Code --
Private Sub Form_Load()
Const strTableQueryName = "tblTreeview"
Dim db As DAO.Database, rst As DAO.Recordset
Set db = CurrentDb
Set rst = db.OpenRecordset(strTableQueryName, dbOpenDynaset, dbReadOnly)
AddBranch rst:=rst, strPointerField:="txtRelationship", strIDField:="txtID", strTextField:="txtNode"
End Sub
'================= AddBranch Sub Procedure ======================
' Recursive Procedure to add branches to TreeView Control
'Requires:
' ActiveX Control: TreeView Control
' Name: xTree
'Parameters:
' rst: Self-referencing Recordset containing the data
' strPointerField: Name of field pointing to parent's primary key
' strIDField: Name of parent's primary key field
' strTextField: Name of field containing text to be displayed
'================================================= ============
Sub AddBranch(rst As Recordset, strPointerField As String, _
strIDField As String, strTextField As String, _
Optional varReportToID As Variant)
On Error GoTo errAddBranch
Dim nodCurrent As Node, objTree As TreeView
Dim strCriteria As String, strText As String, strKey As String
Dim nodParent As Node, bk As String
Set objTree = Me!axTreeView.Object
If IsMissing(varReportToID) Then ' Root Branch.
strCriteria = strPointerField & " Is Null"
Else ' Search for records pointing to parent.
strCriteria = BuildCriteria(strPointerField, _
rst.Fields(strPointerField).Type, "=" & varReportToID)
Set nodParent = objTree.Nodes("a" & varReportToID)
End If
' Find the first emp to report to the boss node.
rst.FindFirst strCriteria
Do Until rst.NoMatch
' Create a string with LastName.
strText = rst(strTextField)
strKey = "a" & rst(strIDField)
If Not IsMissing(varReportToID) Then 'add new node to the parent
Set nodCurrent = objTree.Nodes.Add(nodParent, tvwChild, strKey, strText)
Else ' Add new node to the root.
Set nodCurrent = objTree.Nodes.Add(, , strKey, strText)
End If
' Save your place in the recordset so we can pass by ref for speed.
bk = rst.Bookmark
' Add employees who report to this node.
AddBranch rst, strPointerField, strIDField, strTextField, rst(strIDField)
rst.Bookmark = bk ' Return to last place and continue search.
rst.FindNext strCriteria ' Find next employee.
Loop
exitAddBranch:
Exit Sub
'--------------------------Error Trapping --------------------------
errAddBranch:
MsgBox "Can't add child: " & Err.Description, vbCritical, "AddBranch Error:"
Resume exitAddBranch
End Sub
'--End Code--
Thanks
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Oct 18, 2005
I just discovered TreeView Controls after browsing through this site today...in a word, awesome!
I've done alot of searching, and it seems that most of the discussion on TreeView is at a data level.
What I am wondering is if a TreeView can be used as a database navigational pane...ie switchboard, where the nodes are comprised of individual forms and/or reports, that when clicked, opens the associated form/report?
Does anybody have a sample db where this is being done or can somebody give me some tips on doing this?
I have a sample treeview.mdb in 2000, and I can freely create the parent and child nodes. That is the extent of my knowledge. I don't know how to make the nodes "actionable".
I appreciate all the advice!
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If anyone wants to test this out to verify its a true bug it would be helpful:
Create a tab control.
Place a treeview control (with checkboxes = Yes) on one of the pages.
Populate the treeview.
Check some boxes.
Move to the next page of the tab control.
Return to the page with the treeview.
Viola! The checkboxes you checked previously are all unchecked.
(Not just visually, but property-wise as well).
One step forward, two steps back.
Actually, the work around is to remove the treeview from the tab control and then change the Visible property of the treeview to False if on a different tab page, and True if on the page you want it to display on. But c'mon why can't it work the way you'd expect it to work!
Jeff
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'----------------------------
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Dim strKey As String
Dim strTag As String
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[Code] ....
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I have a treeview control which is based on a table.
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PC
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thanks
Attachment: AC2000 or AC2003
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I already posted a question like this here:
http://www.access-programmers.co.uk/forums/showthread.php?t=80756
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A sample of what I'm trying to do is available at the link.
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Sorry for the dbl-post.
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I've been searching google for 2 weeks without any answers.
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