message box should display in their own tab page of tab control

hi every one ,
i have tab control in windows from
tab control,consist of multiple tab page namely:tabpage1,tabpage2,tabpage3,tabpage4

tabpage1 consist of two textbox and submit button
tabpage1:txtusername,txtpassword,btnsubmit.

similarly
tabpage2 consist of web browser control which connects to yahoo page

when iam specifying WRONG username, password and submitting -it will verify login credentials with the database.
at the same time iam clicking the tabpage2 which will display yahoo page.
In the background login verification is going on ,once it complete it will display message box saying that 'invalid login credentials'. but currently iam in tabpage2 so this message box should not appear when iam in tabpage2 or any other page other than tabpage1.
so to overcome i written a line sof code before the messagebox of login.

codsearch.TabControl2.SelectTab(0)

codsearch.TabControl2.TabPages(0).Focus()

formname=codsearch
tabcontrol name=tabcontrol2

messagebox.show('invalid login credentials')

since iam doing this login verification using a subroutine of another class.
which is written out of the form (eg: class)

so any idea to overcome this.

warm regards
arifsharif_2001

1 Reply

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Sokak19y ago
If you want to prevent someone from accessing a tab until the login has been verified, you can use a boolean flag for "loggedIn" that is updated when the login was successful. Then use the "Selecting" event on the tab control to check the index being selected:

if (e.SelectedIndex > 0 && !loggedIn)
{
e.Cancel = true;
}

This allows you to cancel the option to switch tabs until certain criteria are set.
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