Question

I’m trying to bind multiple tables together and have a subform display data based on my combobox (ID name = CbproductName) selection in a form named Form2. I’m using Ms office Access.

This is the query

SELECT Employee.EmpName, Employee.EmpCode, Employee.CompanyID, Employee.DeptID,
       Employee.ComputerID, Software.ProductName 
  FROM Software
       INNER JOIN (
             (
              Computer INNER JOIN Employee ON Computer.CompID = Employee.ComputerID) 
              INNER JOIN Application ON Computer.ComputerName=Application.[A-ComputerID]
             )
       ON Software.ID = Application.SoftwareID 
 WHERE Application.SoftwareID = Form2.CbProductName;

However it keeps prompting me to enter the parameter value when i run the form, and it doesn’t display the result of the entered value. it also doesn’t change according to the combobox selection.
Can someone point me at a direction to get it done?

Answer 1

In a query, reference a form by its name as a member of the Forms collection. And then reference the value of a control on that form using the control name. It should look like this pattern:

Forms!FormName!ControlName

In your query, change the Where clause to this:

WHERE Application.SoftwareID = Forms!Form2!CbProductName;

Then make sure to refresh that query in after update event of CbProductName. You indicated the query is used as the record source for a subform, so assuming the subform control is on the same form as the combo box, try this as the after update procedure:

Private Sub CbProductName_AfterUpdate()
    Me!SubformControlName.Form.Requery
End Sub

Beware, the subform control name may not be the same as the name of the form it contains. Make sure you use the name of the control.