PRB: Form with Subclassed Combo Looks for RowSource from Class

• Microsoft Visual FoxPro for Windows, versions 3.0 and 3.0b

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

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