Check if a specific tab page is selected active

Question

I am making an event to check if specific tab page in a tab control is active   The point is  it will trigger an event if that tab page in a tab control is the currently selected tab  Any code that will give me what I need

User · Answer

To check if a specific tab page is the currently selected page of a tab control is easy; just use the SelectedTab property of the tab control:

if (tabControl1.SelectedTab == someTabPage)
{
// Do stuff here...
}

This is more useful if the code is executed based on some event other than the tab page being selected (in which case SelectedIndexChanged would be a better choice).

For example I have an application that uses a timer to regularly poll stuff over TCP/IP connection, but to avoid unnecessary TCP/IP traffic I only poll things that update GUI controls in the currently selected tab page.

User · Answer

Assuming you are looking out in Winform  there is a SelectedIndexChanged event for the tab  Now in it you could check for your specific tab and proceed with the logic   private void tab1 SelectedIndexChanged object sender  EventArgs e         if  tab1 SelectedTab    tab1 TabPages  tabname     your specific tabname                    your stuff

User · Answer

I think that using the event tabPage1 Enter is more convenient     tabPage1 Enter    new System EventHandler tabPage1 Enter    private void tabPage1 Enter object sender  EventArgs e        MessageBox Show  you entered tabPage1        This is better than having nested if-else statement when you have different logic for different tabs  And more suitable in case new tabs may be added in the future     Note that this event fires if the form loads and tabPage1 is opened by default

User · Answer

For whatever reason the above would not work for me   This is what did   if  tabControl SelectedTab Name     tabName              do stuff     where tabControl SelectedTab Name is the name attribute assigned to the page in the tabcontrol itself

User · Answer

in  Net 4 can use  if  tabControl1 Controls 5     tabControl1 SelectedTab                  MessageBox Show  Tab 5 Is Selected      OR  if   tabpage5    tabControl1 SelectedTab           MessageBox Show  Tab 5 Is Selected

User · Answer

This can work as well   if  tabControl SelectedTab Text     tabText             do stuff

[c#] Check if a specific tab page is selected (active)

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