limit contents of combo box

[bobby213]

I found this information from http://home.att.net/~dashish/forms/frm0028.htm

If anyone can explain it to me a little better id be very grateful as I dont really use SQl at all, I want the value from cboProjectName to limit whats in cbosub
thanks for the time,
bobby

(Q) How can I limit the contents of one combo/list box based on what's selected in another combo/list box?

(A) An easy way to do this would be to assign a dynamic SQL statment to the RowSource of the secondary combo/list box at runtime.

Let's say you have two comboboxes, cbxCombo1 and cbxCombo2. The RowSourceType of cbxCombo1 is set to "Field List" and RowSource to a table Category. cbxCombo2 doesn't have anything under RowSource.

In this case, you can put code in the AfterUpdate event of cbxCombo1 that assigns the proper RowSource to cbxCombo2.

'**************** Code Start *************
Private Sub cbxCombo1_AfterUpdate()
Dim strSQL As String
strSQL = "Select " & Me!cbxCombo1
strSQL = strSQL & " from Categories"
Me!cbxCombo2.RowSourceType = "Table/Query"
Me!cbxCombo2.RowSource = strSQL
End Sub
'**************** Code End *************


To filter records in a combo/listbox based on the value selected in another combo/listbox, you can use a stored query which uses the first control's value as a parameter. For example,

Select PeopleID, PeopleName from tblPeople Where PeopleID = Forms!FormName!NameOfFirstControl;

Then all you need to do is issue a Requery on the second combo/listbox in this first control's AfterUpdate event.

Private Sub NameOfFirstControl_AfterUpdate()
Me!NameOfSecondControl.Requery
End Sub

If you read all the way down here thanks!

 

[FrankH]

Add whatever field is the first field in the query that fills cboProjectName to the query that fills cboSub.
In the criteria section of this field in (qrycboSub) add Forms!frmTheNameOfTheForm!cboProjectName.
Then in AfterUpdate of cboPrjectName - (in the code) - add: Me!cboSub.Requery