How to Deactivate Mdi Parent form when A mdi child form is open

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Hello,
In my application I have a login screen and a main menu screen which is mdiparent. Now when I run application, mainmenu screen get loaded, also at the same time login screen is also displayed and focus is set on login screen. Now when login screen is activated then I am trying to deactivate the main menu and after valid login activate main menu and close the login screen.

The mainmenu form should not be activated till valid login.

How to do this please help??

Posted 3-Mar-11 1:53am

Yatin Bhagat

Updated 3-Mar-11 2:51am

Henry Minute

v2

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OriginalGriff · Answer 1 · 2011-03-03T02:24:00

Solution 1

Display your login screen from within the MainMenu using the myLoginForm.ShowDialog method.

Posted 3-Mar-11 2:24am

OriginalGriff

Comments

Yatin Bhagat 4-Mar-11 1:06am

i am using showdialog...but it is raising some error

Yatin Bhagat 4-Mar-11 7:19am

I sort Out The error...But When Using ShowDialog the contents of MainMenu are enabled i am trying to disable the contents and after valid login content should be enabled.

Henry Minute · Answer 2 · 2011-03-03T03:02:00

Show your Login Form from the Main method before showing the MainMenu Form

C#

static void Main()
{
  Application.EnableVisualStyles();
  Application.SetCompatibleTextRenderingDefault(false);

  MyLoginForm login = new MyLoginForm();
  if (login.ShowDialog() == DialogResult.Ok)
  {
    Application.Run(new MainmenuForm());
  }
}

Checking for a valid login should be done in MyLoginForm, which should only return OK for a valid login.

johannesnestler · Answer 3 · 2011-03-03T02:47:00

Solution 2

OriginalGriff mentioned it - don't make your login screen a MdiChild - just show it as modal window with "ShowDialog"

Posted 3-Mar-11 2:47am

johannesnestler

Sergey Alexandrovich Kryukov · Answer 4 · 2011-03-03T05:29:00

Solution 4

The best advice for you would be: never use MDI!
See also: Question on using MDI windows in WPF[^].
It looks like everyone is unhappy with MDE, for a good reason. You will only irritate all your users with frustrated user experience. Who use it, anyway?

—SA

Posted 3-Mar-11 5:29am

Sergey Alexandrovich Kryukov