How to disable the parent form when a child form is active

Question

How to disable a parent form when child form is active using c

User · Answer

Have you tried using Form ShowDialog   instead of Form Show     ShowDialog shows your window as modal  which means you cannot interact with the parent form until it closes

User · Answer

ChildForm child   new ChildForm    child Owner   this  child Show         In ChildForm Load   private void ChildForm Load object sender  EventArgs e       this Owner Enabled   false     private void ChildForm Closed object sender  EventArgs e       this Owner Enabled   true       source   http   social msdn microsoft com Forums vstudio en-US ae8ef4ef-3ac9-43d2-b883-20abd34f0e55 how-can-i-open-a-child-window-and-block-the-parent-window-only

User · Answer

Melodia   Sorry for this is not C  code but this is what you would want  besides translating this should be easy   FORM1  Private Sub Form1 MouseEnter sender As Object  e As EventArgs  Handles MyBase MouseEnter     Me Focus       Me Enabled   True     Form2 Enabled   False End Sub  Private Sub Form1 MouseLeave sender As Object  e As EventArgs  Handles MyBase MouseLeave     Form2 Enabled   True     Form2 Focus   End Sub   FORM2  Private Sub Form2 MouseEnter sender As Object  e As EventArgs  Handles MyBase MouseEnter     Me Focus       Me Enabled   True     Form1 Enabled   False End Sub  Private Sub Form2 MouseLeave sender As Object  e As EventArgs  Handles MyBase MouseLeave     Form1 Enabled   True     Form1 Focus   End Sub   Hope this helps

User · Answer

What you could do  is to make sure to pass the parent form as the owner when showing the child form     Form newForm   new ChildForm      newForm Show this     Then  in the child form  set up event handlers for the Activated and Deactivate events   private void Form Activated object sender  System EventArgs e        if  this Owner    null                this Owner Enabled   false            private void Form Deactivate object sender  System EventArgs e        if  this Owner    null                this Owner Enabled   true            However  this will result in a truly wierd behaviour  while you will not be able to go back and interact with the parent form immediately  activating any other application will enable it  and then the user can interact with it   If you want to make the child form modal  use ShowDialog instead     Form newForm   new ChildForm      newForm ShowDialog this

User · Answer

Form1 frmnew   new Form1    frmnew ShowDialog

User · Answer

Are you calling ShowDialog   or just Show   on your child form from the parent form   ShowDialog will  block  the user from interacting with the form which is passed as a parameter to ShowDialog   Within the parent you might call something like   MyChildForm childForm   new MyChildForm     childForm ShowDialog this     where this is the parent form

User · Answer

Why not just have the parent wait for the child to close  This is more than you need      Execute child process System Diagnostics Process proc        System Diagnostics Process Start  notepad exe    proc WaitForExit

User · Answer

You can do that with the following   Form3 formshow   new Form3     formshow ShowDialog

User · Answer

You can also use MDIParent-child form  Set the child form s parent as MDI Parent  Eg  child MdiParent   parentForm  child Show      In this case just 1 form will be shown and the child forms will come inside the parent  Hope this helps

User · Answer

Its simple  use      Form ShowDialog      Instead    Form Show      While using Form ShowDialog  you cannot interact with the parent form until it closes

User · Answer

While using the previously mentioned childForm ShowDialog this  will disable your main form  it still doesent look very disabled  However if you call Enabled   false before ShowDialog   and Enable   true after  you call ShowDialog   the main form will even look like it is disabled   var childForm   new Form    Enabled   false  childForm  ShowDialog this   Enabled   true

User · Answer

For me this work for example here what happen is the main menu will be disabled when you open the registration form    frmUserRegistration frmMainMenu   new frmUserRegistration        frmMainMenu ShowDialog this

User · Answer

If you are just trying to simulate a Form ShowDialog call but WITHOUT blocking anything  kinda like a Simulated Dialog Form  you can try using Form Show   and as soon as you show the simulated dialog form then immediately disable all other windows using something like     private void DisableAllWindows     foreach  Form f in Application OpenForms  if  f Name    this Name f Enabled   false  else f Focus        Then when you close your  pseudo-dialog form  be sure to call      private void EnableAllWindows     foreach  Form f in Application OpenForms  f Enabled   true

[c#] How to disable the parent form when a child form is active?

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