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How to use Combo Box with Database

Posted on 1997-03-29
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Last Modified: 2008-03-06
Dear Experts;

     In my application ; It is necessary to use Combo Box to show information from DB. It must show information. 1 Combo is shown 2 fields..

     2. How to code to seek information.[ Assume that I want to seek Citystate ]

     Please answer me... How to code...

     I have  ANUM.[Counter field and Index], Addr1, addr2, citystate and Zip
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Question by:u3520384
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ksleung earned 20 total points
ID: 1424816
In the combo boxes (normal Combo Box or DBCombo Box), they cannot show two columns.  You have two choices though.  One is to buy some 3rd party OCX (e.g. Sheridan Data Widgets) to accomplish this task.  Or you can write some code to do it.  What you should do is as follows.

Assumptions:
1.  The form where the combo box (Combo1) resides on is called Form1.
2.  The database is called Test.MDB which is located in C:\TEST.
3.  The table is called tbl_Test.
4.  The Combo box shows the Citystate and ZIP fields.
5.  Set the Combo Box Style to 1 so that the user can type in the searching string.

In the Form Load event,

Sub Form1_Load()
  Dim DB As Database, Rs As Recordset

  'connect to the database
  Set DB=DBEngine.Workspaces(0).OpenDatabase("C:\Test\Test.MDB")
  'open a read only recordset
  Set Rs=DB.OpenRecordSet("tbl_Test", DBOpenSnapshot)
  'Goto the first record
  Rs.MoveFirst
  Do Until Rs.EOF
    Combo1.AddItem Rs.CityState & " " & Rs.ZIP
    Rs.MoveNext
  Loop
End Sub

The above code will create a combo box which shows 2 fields whenever the form is loaded.

To search the Citystate field, code the followings.

In the Combo1 Click Event,

Sub Combo1_Click()

  Dim sSearch As String

  sSearch="CityState='" & Trim$(Combo1.Text) &"'"
  Rs.FindFirst sSearch
  If Not Rs.NoMatch Then
    Combo1.Text=Rs.CityState & " " & Rs.ZIP
  Else
    MsgBox "Entry does not exist."
    Exit Sub
  End If
End Sub

The above code will use the user input as the search string to search through the database.  If it exists, it will show up in the Combo Box.  Otherwise, the user will be warned for wrong entry.
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