Knowledge Base

PRB: List Box Does Not Respect NumberOfElements

Article ID: 135841

Article Last Modified on 5/7/2003

Microsoft Visual FoxPro 3.0 Standard Edition
Microsoft Visual FoxPro 3.0b Standard Edition
Microsoft Visual FoxPro 5.0 Standard Edition
Microsoft Visual FoxPro 5.0a

This article was previously published under Q135841

SYMPTOMS

When you work with a list box in Visual FoxPro 3.0x and you specify a value for the NumberOfElements property and the ColumnCount property, the NumberOfElements will not be respected. In Visual FoxPro 5.0x, the same behavior occurs when the ColunmCount property is set to a value other than 1.

WORKAROUND

The NumberOfElements property is used only when the RowSourceType for a list box is an array. When using an array as the RowSourceType, you can redimension the array to the number of elements you want to display. For example, you could add the following code to either the form's Load event procedure or the list box's Init event procedure:

   DIMENSION testa[ 2, ALEN( testa, 2 ) ]

STATUS

Microsoft has confirmed this to be a problem in the Microsoft products listed at the beginning of this article.

MORE INFORMATION

Steps to Reproduce Problem

In the Command window enter the code below.

Open the Customer table and execute the following code:
```
      Dimension testa[5,2]
      copy to array testa fields cust_id,country
```
Create a new form.
Add a list box to the form.

Change the list box properties as follows:

      RowSourceType = 5 - Array
      RowSource =  testa
      NumberOfElements = 2
      ColumnCount = 2

Save and run the form.

In Visual FoxPro 3.0x, the list box shows 5 items, not 2. In Visual FoxPro 5.0x, changing the ColumnCount property to 1 seems to make the behavior disappear. However, the problem reappears if the ColumnCount is set to any other value.

Additional query words: 3.00 3.00b

Keywords: kbbug kbfix kbvfp500fix KB135841