Slide 9.3: An example of multiple forms

An Example of Multiple Forms

This example uses three forms:

The “Home” form on the right,
The “Happy” form showing a smiley face, and
The “Frown” form displaying a frown face.

and three methods:

Show shows the form with the specified owner to the user,
Hide hides a form object, and
Exit exits the application.

The following program implements the above form:

When the “Display” button is clicked, it switches to
- the Happy form if the “Happy” radio button is picked or
- the Frown form if the “Frown” radio button is picked
and hide the current form.

When the “Exit” button is clicked, it exits the application.

 using System;
 using System.Windows.Forms;

 namespace WindowsFormsApp4 {
   public partial class Home : Form {
     public Home( ) { InitializeComponent( ); }

     private void Button1_Click( object sender, EventArgs e ) {
       if ( radioButton1.Checked ) {
         Form f = new Happy( );
         f.Show( );
         this.Hide( );
       }
       else {
         Form f = new Frown( );
         f.Show( );
         this.Hide( );
       }
     }
     private void Button2_Click( object sender, EventArgs e ) {
       Application.Exit( );
     }
   }
 }