PRB: Pageframe Does Not Display All the Pages

ID: Q142282

3.00 3.00b WINDOWS kbtool kbprb

The information in this article applies to:

Microsoft Visual FoxPro for Windows, versions 3.0 and 3.0b

SYMPTOMS

Using RemoveObject and then AddObject to control pages in a PageFrame may result in a visual loss of pages.

WORKAROUND

Use either of the following two workarounds to prevent a visual loss of pages:

Remove all pages before adding any new pages to the pageframe.
-or-
Remove pages in the reverse order in which they were added. Then add the new pages. For example, the following code adds three pages to a PageFrame:
```
      _SCREEN.FORMS(1).PAGEFRAME1.AddObject("Page1","Page")
      _SCREEN.FORMS(1).PAGEFRAME1.AddObject("Page2","Page")
      _SCREEN.FORMS(1).PAGEFRAME1.AddObject("Page3","Page")
```
When you use RemoveObject, Page3 should be removed before Page2 and Page2 should be removed before Page1. After removing pages in the correct order, new pages can be added and displayed properly.

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 form in the Form Designer.

2. Add a PageFrame to the form.

3. Set the PageCount property of the PageFrame to 0.

4. Run the form.

5. In the Command window, type the following:

   _SCREEN.FORMS(1).PAGEFRAME1.AddObject("Page1","Page")
   _SCREEN.FORMS(1).PAGEFRAME1.AddObject("Page2","Page")
   _SCREEN.FORMS(1).PAGEFRAME1.AddObject("Page3","Page")
   _SCREEN.FORMS(1).PAGEFRAME1.RemoveObject("Page1","Page")
   _SCREEN.FORMS(1).PAGEFRAME1.RemoveObject("Page2","Page")
   _SCREEN.FORMS(1).PAGEFRAME1.AddObject("Page1","Page")
   _SCREEN.FORMS(1).PAGEFRAME1.AddObject("Page2","Page")

6. Open the debug window, and type the following:

   _SCREEN.FORMS(1).PAGEFRAME1.PageCount

The debug window shows the PageCount to be 3, which is correct. However, nly two pages are displayed in the PageFrame.

Additional reference words: 3.00 3.00b VFoxWin KBCategory: kbtool kbprb KBSubcategory: FxtoolFormdes

Keywords          : FxtoolFormdes 
Version           : 3.00 3.00b
Platform          : WINDOWS