Issue with controls on tabControl - no data refreshing before clicking on all tabPages

Question

I have a problem with controls nested in a TabControl. I have a TabControl with n TabPages, with a DataGridView on each TabPage. Each DataGridView has a CheckBoxC column. I populate all datagridviews with different datasources (so each has different types of data). This is working ok!

I have added a ComboBox column so I can select all the rows on all DataGridViews. I do this programmatically (on a button click), and the counting of the selection is ok, except that the ticks are not added to checkBox cell of DataGridViews except on TabPage #1 (the one that I can see on startup).

If I click all the tabPages before I go and select all the rows in DataGridViews, the code works fine, and the ticks are added to all the rows (like I wanted).

But why this does not work without clicking all the tabPages? Is there any bug or something of TabControl?

This is by design, binding only occurs when a control is visible. It is an optimization, you'll need to deal with that. — Hans Passant, May 20 '12 at 16:26
So I have to bind data for each datagridview when appropriate tabPage is selected? This cannot be true, because the data are binded jsut fine - only ticks (for checkBox cells) are not added - when I set Value property of it to true. — Mitja Bonca, May 20 '12 at 16:34
I think you might find a solution in my answer to [Does data binding work on invisible control?][1] [1]: http://stackoverflow.com/questions/943473/does-data-binding-work-on-invisible-control — Hasani Blackwell, May 20 '12 at 16:55

score 1 · Answer 1 · answered Mar 20 '15 at 17:40

1

My workaround was to add this in the load event of the form.

this.tabcontrol1.BindingContext = this.BindingContext;

answered Mar 20 '15 at 17:40

neildt

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score 0 · Accepted Answer · edited May 21 '12 at 06:51

I know this answer is correct for WPF, not positive about WinForms though. With WPF at least, it's a visually based interface, so the program does not load any of the objects/controls/etc on other tabs until they are clicked on. So it wouldn't be a bug, it's a part of the design.

I had a similar problem with trying to clear all textboxes on multiple tabs with a single button. I never did get it working, but I know there should be a way by using a combination of VisualTreeHelper and a foreach statement.

Again, this is based off of WPF and not WinForms, but hopefully it can point you in the right direction as to how to solve it.

Issue with controls on tabControl - no data refreshing before clicking on all tabPages

2 Answers2