Cannot refer to bound controls on tab control page

[NSNewey]

Hi,

I have some bound textboxes and checkboxes on a tab control on a form.

When I first open the form, the controls on any tab pages not showing cannot be refered to. When I click the page they are on, everything is fine. Also, if I click the page they are on then go to another page, I can still refer to their values. It's as if until you use the tab control, you cannot get the values of the bound controls on it's hidden pages.

For example, I have a textbox called txtNotes. When I open the form, the tableadapter is filled and the notes on that record are in the textbox. If I try to refer to them before clicking the tab control, the value is nothing.

This cannot be right, please help!!

 

[Qik3Coder]

Do you happen to have the initial data retrieval ON FORM LOAD?

Are the values in the text boxes NOTHING or STRING.EMPTY?


Remember, the code will only do what you tell it, nothing more, nothing less.

-Sometimes the answer to your question is the hack that works

 

[NSNewey]

Hi,

Thanks for the response Qik3Coder...

I have a form where the user selects the record to open. This form instantiates the edit form and makes a call to this sub which executes after the edit form's load event...

    [green]'called by the invoking form to load a specific record[/green]
    Friend Sub LoadRecord(ByVal EnqID As Long)

        Me.TEnqTableAdapter.FillByID(Me.TradeBaseDataSet.tEnq, EnqID)

    End Sub

For your reference, this is the code that opens the form and calls this sub.

     Dim frmEnq As New fEnq
     frmEnq.Show
     frmEnq.LoadRecord(EnqID)

From this point, the values are in the textboxes. The values I am trying to refer to are neither NOTHING or STRING.EMPTY. In fact, one of them is a checkbox. This checkbox is checked by default and checked in the record, yet if I try to get it's value before showing the page it is on in the tab control, it returns False. Once I show the page it returns True even if I show the page then show a different page. So it does seem that until the tab control page is displayed once, the value cannot be returned correctly.

I have now added a routine to my LoadRecord() to loop through and show each page on the tab control, then return to the first page. Now I can refer to the controls values correctly but this seems a ridiculous workaround.

Any ideas?

 

[Qik3Coder]

Do you have it so that you can only have 1 of these forms open at a time? If so, when you close it, you can "clean" all the values in the form, then set the form to nothing.

Before displaying the form you can explicitly create an instance of the form with clean values.

Just some suggestions.

-Sometimes the answer to your question is the hack that works