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Dynamic Linkmasterfields

P: 1
Hie

I have an unbound form on which there are 3 controls: option group, combo box and a subform. The value of the combo box depends on the value of the option group and the value of link child field depends on the value of the combo box. here is the code:
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  1. Dim stSQL As String, stCriteria As String, stDocNo As String
  2.  
  3. stDocNo = Me.cboDocNo
  4.  
  5. If Frame4.Value = 1 Then
  6.     stSQL = "SELECT [DeliveryNotes].[DeliveryNote], [DeliveryNotes].[Consignee], [DeliveryNotes].[Description], "
  7.     stSQL = stSQL & "[DeliveryNotes].[ClientID] FROM [DeliveryNotes]"
  8. Else
  9.     stSQL = "SELECT [ExpiryDates].[ItemTransID], [ExpiryDates].[InvoiceNo], [ExpiryDates].[Description] "
  10.     stSQL = stSQL & "FROM [ExpiryDates]"
  11. End If
  12.  
  13. Me.cboDocNo.RowSource = stSQL
  14. Me.DeliveryTrans.LinkMasterFields = stDocNo
  15. If Frame4.Value = 1 Then
  16.     Me.DeliveryTrans.LinkChildFields = "[DeliveryNoteNo]"
  17. Else
  18.     Me.DeliveryTrans.LinkChildFields = "[InvoiceNo]"
  19. End If
  20.  
  21. Me.cboDocNo.Requery
This code is set to run when the option group is updated but I'm getting a runtime error. I'm actually prompted for a parameter value. If the value of the combop box (stDocNo) is, for example, 5 I'm prompted for a parameter value of 5. If I haven't entered anything yet I get "Invalid use of null" error. Is there something I'm missing? Please help.

Regards

Liveson
Nov 18 '08 #1
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1 Reply


P: 2
would a discrepancy in name be an issue

Me.DeliveryTrans.LinkChildFields = "[DeliveryNoteNo]"


stSQL = "SELECT [DeliveryNotes].[DeliveryNote],


jo
Nov 19 '08 #2

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