FIX: Blank Child Record Added in One-to-Many Wizard Form

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

SYMPTOMS

If you create a form using the One-to-Many Form Wizard, or the TXTBTNS class in a form with a child grid, a blank record is added to the grid when the child key field name is different from the parent key field name.

CAUSE

The code in the TXTBTNS class of Wizstyle.vcx that adds the child record incorrectly adds a blank record.

WORKAROUND

Rename the key field in the child table to give it the same field name as the key field in the parent table. Recreate the form with the One-to-Many Form Wizard.

-or-

Change a line in the procedure code associated with the cmdAdd.click event in the Txtbtns class of Wizstyle.vcx.

The following line:

   IF EMPTY(m.cChildKey) OR TYPE(m.cChildKey)#TYPE('oAddRec.KeyValue')

   IF EMPTY(m.cChildKey) OR TYPE('m.cChildKey')#TYPE('oAddRec.KeyValue')

STATUS

Microsoft has confirmed this to be a problem in the Microsoft products listed at the beginning of this article. This problem has been fixed in Visual FoxPro 5.0 for Windows.

MORE INFORMATION

Steps to Reproduce Problem

1. Create a table that has the following structure:

      Name:      Table_1
      Fields:    ID1        Character 10
                 Field2     Character 10
                 Field3     Character 10
   
      Add two records to Table_1 with the values AA and BB in the ID1 field.
   
   

2. Create a table that has the following structure:

      Name:      Table_2
      Fields:    ID2        Character 10
                 Field2     Character 10
                 Field3     Character 10
   
      Create an index on Table_2.ID2
   
   

3. Run the One-to-Many Form Wizard. In Step 1, choose Table_1 as the Parent table, choose ID1 as a field, and click the Next button. In Step 2, choose Table_2 as the child table, choose the >> button to select all fields, and then click Next. In Step 3, choose ID1 from the left drop-down list and ID2 from the right drop-down list to establish the relationship. Click the Finish button.

4. Click the "Save and run form" button. Then click Finish. Save the form as Table_1.scx. After the form is displayed, click the Add button.

5. In the Add Record dialog box, choose "Add record to child (Grid) only," and click the Add button. No record will appear in the grid. A record has been added to the child table, but the key field (ID2) is blank for the added record.