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Q141633: PRB: Form with Subclassed Combo Looks for RowSource from Class

Article: Q141633
Product(s): Microsoft FoxPro
Version(s): WINDOWS:3.0,3.0b
Operating System(s): 
Keyword(s): 
Last Modified: 10-FEB-2000

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The information in this article applies to:

- Microsoft Visual FoxPro for Windows, versions 3.0, 3.0b 
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SYMPTOMS
========

When attempting to run a form, an error occurs if the form cannot locate the
table or fields specified in the rowsource of the parent class. This is the
result of a class based on a combo box being used as a template to design a new
combo box. Within the class, the RowSource property of the combobox is set to:

  Select xxx.field1,xxx.field2 from xxx into cursor query

In the Form Designer a combo box from this class is used and the RowSource is
changed to a different value.

WORKAROUND
==========

Do not specify a value of the RowSource in the parent class of the combo box.

STATUS
======

Microsoft is researching this behavior and will post new information here in the
Microsoft Knowledge Base as it becomes available.

MORE INFORMATION
================

Steps to Reproduce Behavior
---------------------------

1. Create a new class based on Combobox.

2. Set the following properties of the combo box within the Class Designer:

     RowSource        =  Select * from xxx into cursor yyy
     RowSourceType    =  3 - SQL STATEMENT

3. Save the combo box class.

4. Create a new form.

5. Place a combo box from the newly created class onto the form.

6. Change the Rowsource of the combo box to:

     Select * from customer into cursor query

7. Add Vfp\Samples\Data\Customer.dbf to the Data Environment.

8. Run the form. An open table dialog box appears for you to select the table
  because table xxx cannot be located. After you select a table, the following
  error occurs:

  Error loading file - parent - record number ???. SQL Column 'Field1' is not
  found

NOTE: If the select statement is removed from the RowSource property of the
combobox class, the error does not occur.

Additional query words: VFoxWin

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Keywords          :  
Technology        : kbVFPsearch kbAudDeveloper kbVFP300 kbVFP300b
Version           : WINDOWS:3.0,3.0b

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