Microsoft KB Archive/129466

PRA: List Box RowSource Runs Twice When Set at Run Time

Article ID: Q129466
Creation Date: 26-APR-1995
Revision Date: 19-SEP-1996 The information in this article applies to:

Microsoft Access version 2.0

SYMPTOMS

Moderate: Requires basic macro, coding, and interoperability skills.

The table or query specified in the RowSource property of a list box run twice.

CAUSE

The problem described above occurs if you use Access Basic code to set the list box's RowSource property at run time.

STATUS

Microsoft has confirmed this to be a problem in Microsoft Access version 2.0. This problem no longer occurs in Microsoft Access for Windows 95 version 7.0.

MORE INFORMATION

Steps to Reproduce Problem

Open the sample database NWIND.MDB.
Create a new form that is not based on any table or query.
Add a list box to the form and set the following properties for the list box.

NOTE: In the following sample code, an underscore (_) at the end of a line is used as a line-continuation character. Remove the underscore from the end of the line when re-creating this code.
```
      Name: Field0
      RowSource: SELECT [Employee ID] FROM Employees WHERE [Employee ID]>_
      [What Employee?]
```
Add a command button to the form and enter the following code for the command button's OnClick event procedure:
```
      Me![Field0].RowSource = Me![Field0].RowSource
```
View the form in Form view. Note that the Parameter dialog box appears as you expect.
Type the number "4" (without the quotation marks), and then choose the OK button.
Choose the command button. Note that the Parameter dialog box appears as you expect.
Type the number "4" (without the quotation marks), and then choose OK. Note that the Parameter dialog box appears a second time.

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Additional reference words: 2.00
KBCategory: kbusage
KBSubcategory: FmsCmbo