Visual Basic Code of the Week (COTW)
Issue #15
All content and source code is Copyright (c) 1997 by C&D Programming Corp. None of the source can be reprinted in any manner without express written permission of C&D Programming Corp.

Requirements for this Issue

The source code in this issue is designed for Visual Basic 4 and up. It also requires a copy of True DBGrid from APEX Software Corporation. We use this grid in all our applications that need a data grid. Based on your subscription responses many of you already use True DBGrid.

In this Issue

This issue shows how to easily use the ValueItem feature of True DBGrid. Apex explains the ValueItem feature as such:

You can get more details on the ValueItems feature by reviewing the help file for True DBGrid. It should be called TDBGRID.HLP and is usually located in your Windows or Windows System directory. You should also be able to access it by clicking a True DBGrid object in the Visual Basic design environment and pressing the F1 key. This usually brings up context sensitive help in Visual Basic.


Public Sub LoadColumnCombo(DBGrid As TDBGrid, sDBName As String, _
                  sSQL As String, sColumn As String, sDisplayField As String, _
                  sValueField As String)


Return Value

None unless an error occurs. If an error occurs this routine will raise the error to the calling subroutine.

Sample Usage

We will demonstrate an example of this routine. The most likely place this routine will be used is in startup code for a form that contains a True DBGrid on it.

The below example assumes the following:

After this example executes the column "Payment Type" in the grid grdData will contain all the records in the [Payment Methods] table.

       LoadColumnCombo(grdData, sDBName, "SELECT * FROM [Payment Methods]", "Payment Type", "Description", "ID")

Source Code

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Comments on the Source Code

A useful enhancement to this routine would be to define additional parameters to set the Translate, CycleOnClick, Validate and Presentation properties.

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That concludes this issue of COTW. We hope you find the source code useful in your development.

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Future Issues

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Contact Information

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Floral Park, NY 11002-0128
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