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Focus Directly Goes to the MS Flexgrid Entercell Instead of the Current Control  LostFocus event

Posted on 2001-06-20
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Last Modified: 2012-08-13
Thanks for any ideas.

I am using VB 6.0.  I have a one column MS Flexgrid where a user can click on a repair service number.  A vehicle may have many repair service numbers and a comment for each repair service number.  The application is designed to record a particular repair service number without a comment.  If user decides to quit and not input any comments for that service number, only the repair service number will be recorded.

Service numbers are entered in the system via a textbox.

If I highlight a repair service number in the MSFlexgrid, the correct comments appear in a textbox below.  That works fine.  The application is also designed to automatically record any data in the textbox after the user closes the form, clicks on the same repair service number or different repair service number in the MSFlexgrid.  

Using a lostfocus event in the textbox to record a comment with that service repair number works fine except when clicking on a different service repair number in the MSFlexgrid.  What's happening is when a different service repair number is chosen in the MSFlexgrid, focus goes directly to the MSFlexgrid entercell before going to the lostfocus event, which is responsible for recording the comment with the appropriate service repair number.

I lose data once focus has left the textbox without recording it with the right service repair number.  A MSFlexgrid entercell event houses code for displaying the next record using the arrow keys or mouse pointer click.

Question??????  What can I put in the MSFlexgrid to prevent the system from going to the MSFlexgrid entercell "first" instead of the lostfocus event of the textbox control?  Please explain!  I was under the impression that a lostfocus event would fire before going to another control, in this case, back to the MSFlexgrid.

Thanks    
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Question by:BirdsOfFire1
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Expert Comment

by:Valliappan AN
ID: 6212867
yes, thats right, the lostfocus will be triggered, only after, getting focus to another control.

You could use the Validate event for the text box, which I myself found after a very long time.

if you want details, let me know.

hope this helps,
Cheers.
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Expert Comment

by:Hornet241
ID: 6213034
If you can create a Public variable

Public PrevServNum as String ' or what ever you require

in MSFlexgrid lost focus event set the PrevServNum to the appropriate setting, then use this variable to store the data.

Then when user click on a new grid line your data will still go to the right place
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by:Valliappan AN
ID: 6213116
Hornet241,

The question is about lostfocus of TextBox, triggering EnterCell of MSFlexGrid, if I had understood properly.
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Expert Comment

by:TimCottee
ID: 6214921
I would slightly modify Hornet241's thoughts:

Set a flag on the form which is set to TRUE in the EnterCell event of the grid, in the leave cell event of the grid, check the status of this flag, if false call the textbox_LostFocus event explicitly otherwise not. Set the flag to FALSE in the lostfocus event to avoid it being called twice. This should handle moving cells in the grid without the focus ever going to the textbox but will still call the textbox_LostFocus procedure if you do.

Hope this helps.
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Accepted Solution

by:
Valliappan AN earned 100 total points
ID: 6215028
You could use the Validate event with whatever code you have in lostfocus event of Textbox, with slight modifications, in case you do Textbox.setfocus on some validation error, then you need to change it as Cancel=True.

Have a look at this:

http://msdn.microsoft.com/library/devprods/vs6/vbasic/vbcon98/vbcstrestrictfocususingvalidationeventcausesvalidationproperty.htm

Hope this helps,
Cheers.
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Expert Comment

by:Valliappan AN
ID: 6215032
In case you dont wish to do validation/validate event code on pressing some button, say, Cancel, then you could set the CausesValidation property of the Command button to False.

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Expert Comment

by:Hornet241
ID: 6215120
valli_an

>>>The question is about lostfocus of TextBox, triggering EnterCell of MSFlexGrid, if I had understood
properly.

As I understand it, it's above the Entercell event firing before the lost focus event and changing the row of the flexgrig before an update in the textbox lost focus

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Expert Comment

by:Valliappan AN
ID: 6216779
ya, Hornet241 you are right. I mentioned of Validate event, so that the lostfocus code, if put in Validate event, then the Validate event will trigger before the EnterCell event of the Flexgrid. So, no problem, because of the lostfocus event.

Thats what I meant. Hope I had understood it properly.

You could check with the MS link, that I had provided, it says, the lostfocus event occurs only after another control gets focus, to avoid that you could use Validate event.

Thank you,
Cheers.
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LVL 9

Expert Comment

by:Valliappan AN
ID: 6216787
ya, Hornet241 you are right. I mentioned of Validate event, so that the lostfocus code, if put in Validate event, then the Validate event will trigger before the EnterCell event of the Flexgrid. So, no problem, because of the lostfocus event.

Thats what I meant. Hope I had understood it properly.

You could check with the MS link, that I had provided, it says, the lostfocus event occurs only after another control gets focus, to avoid that you could use Validate event.

Thank you,
Cheers.
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Author Comment

by:BirdsOfFire1
ID: 6229584
All of the participates contributed, but I liked the validate event better.  Used it and it worked.

Thanks Again
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