How to set system.windows.forms.tabcontrol individual tab's properties?

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In my Windows Form Application, I added a System.Windows.Forms.TabControl object (termed tabControlMain here). It contains multiple tabs. In the Designer.cs, the 2 tabs are added into tabControlMain.

this.tabControlMain.Controls.Add(this.tpMain);
     this.tabControlMain.Controls.Add(this.tpViewData);

I want to set an individual tab (e.g. tpViewData) .Enabled and also .Visible dynamically. However, the individual tab does not have the .Enabled and .Visible properties. How to solve this problem? Thanks.

What I have tried:

Set System.Windows.Forms.TabControl individual tab's properties

Posted 29-Sep-17 5:10am

s yu

Updated 29-Sep-17 5:57am

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OriginalGriff · Accepted Answer · 2017-09-29T05:57:00

Solution 1

TabPage does not support Visible or Enabled: they are inherited, masked so you can't access them from Intellisense, and deliberately disabled.
You can access them programmatically by typing the names:

C#

tabPage1.Visible = false;
tabPage2.Enabled = false;

And your code will compile.

But they will have no effect.

You cannot disable or hide a tabpage - you can only remove it from the TabPages collection of the parent TabControl, or add a Panel which fills the tab page and use the Enabled property of that.

Posted 29-Sep-17 5:57am

OriginalGriff

Comments

s yu 29-Sep-17 13:54pm

Griff: Thanks for your response. Using your code, the tab.Enable does show false in debugging. However, if I click the tab, the tab's container still displays. Is it possible to avoid this event happen (namely not display the tab is disabled)?
Then, I tried to do this:
if (tpViewData.Enable == false)
tpMain.Focus();
But it still displays tpViewData rather than the tpMain. Do you have any idea how to solve this problem? Thanks.

OriginalGriff 29-Sep-17 14:09pm

Read hwt I said:
"And your code will compile.

But they will have no effect."

The properties do not work, they are deliberately disabled. You cannot disable a tab page, although you can disable its content by putting them all inside a panel and disabling the panel. But the only way to "hide" a tab page completely is to remove it from the TabControl.TabPages collection, as I said 2 hours ago!

s yu 29-Sep-17 14:59pm

You are right. Using
this.tabControlMain.Controls.Add(this.tpViewData);
and / or
this.tabControlMain.Controls.Remove(this.tpViewData);
Thanks.