How to hide a page?

[Tommy Carlier]

How can I hide a KryptonPage (and the attached button or tab)? I've tried setting Visible to false (in code), but it doesn't work if the Visible property is already false (because the page is not selected).
I'm working on an application where the user logs on, and depending on the type of user, certain pages (and their button/tab) should be hidden.

[Tommy Carlier]

I managed to temporarily get the desired effect by first setting Visible to true and then to false.
EDIT: apparently, this trick only works after the form has been shown (works in the OnShown method of the form, but not before that.)

[Phil Wright]

Did you try using the KryptonPage.Hide() method instead? Not sure it will make any difference but worth a try.

[Tommy Carlier]

I'll try it out Monday.

[Tommy Carlier]

KryptonPage.Hide() has the same effect as setting KryptonPage.Visible to false.

[Phil Wright]

This is odd. The actual KryptonPage is not hidden when it is not the selected page. Instead it is merely positioned off the visible area of the control so you cannot see it. Hence it should return True for KryptonPage.Visible at runtime even when it is not visible.

I wonder if you scenario is occuring because you are trying to access the visible property before the control has been fully created or displayed for the first time? Do you have a sample that demonstrates the issue?

[Tommy Carlier]

It's very easy to reproduce:
- create a new Windows Application
- drop a KryptonNavigator on the form (it will already have 2 pages)
- in the constructor, after InitializeComponent(), put this line: kryptonPage2.Visible = false;
- run

The second tab is still visible and if you click it you even get an exception 'Cannot select a page that is not visible'

[thols]

Same problem here. Is there a fix for it?

[Phil Wright]

Added to the bug list. Thanks.

[Phil Wright]

You need to set the property in the Load event of the Form and not in the constructor. In general you should not be changing visual controls in the constructor but instead in the Load event because the controls have not actually had their windows handles created until that event is fired.

[Torrwin]

The second tab is still visible and if you click it you even get an exception 'Cannot select a page that is not visible'

I'm having the exact same problem. Is there a workaround yet?

[aspatz]

hallo,

i have the same problem with the Navigator:

- i have a MainNavigator with MainPage1, MainPage2, ...
- and a DetailNavigator with DetailPage1, DetailPage2, DetailPage3, DetailPage4.

-> Case1: MainPage1 uses DetailPage1, DetailPage2, DetailPage3
-> Case2: MainPage2 uses DetailPage1, DetailPage3, DetailPage4

i want to make in Case1 the DetailPage4 and in Case2 DetailPage3 invisible.
I think this is a common szenario. How can i do it.
When will a service release be available.

regards Arnold

[vesuvius]

Phil this is NOT a bug.

I have the following navigator on a form




If I use kryptonPage2.Visible = false; or kryptonPage2.Hide(); in the Form_Load the This Works

If you use both these commands in the forms contructor the they do not work.

aspatz there is no problem here, and you need to figure out how to show and hide your navigators. I have a similar application doing what you want and it works.

[Torrwin]

Vesuvius,

Are you just addressing aspatz's post, or all four of ours?

[vesuvius]

I am addressing all of them. The mistake people have made is using the krypton logis in the forms contructor and not in the form load.

If you have any problems, just post in this thread and I'll do what I can to help. I can even do a screencast to prove that this works.

[Torrwin]

My visible properties are toggled at runtime, not in the constructor.

I'm working on sending you a sample application which reproduces the problem.

[aspatz]

hallo Vesuvio,

...it is not like you say.
I have to handle the Navigator Page visibility at runtime not in the constructor or load.
And than it does not work. The only way to made Pages invisible is to remove them, if you want them to show again you have to add them. I will now add an dictionary to the navigator to cache removed pages.

Arnold

[aspatz]

hallo Vesuvius and the others,
I have to excus me.

The TabPages Visibility works:

NavigatorXYZ.Pages["NameOfThePage"].Visible = false;

Arnold

[Torrwin]

I was unable to scale down my application enough (while still reproducing the problem) to send you a sample app.

However, installing 3.0.0 seems to have fixed the issue. Thanks for whatever you did!