MessageBox Class

Displays a message box that can contain text, buttons, and symbols that inform and instruct the user.

Definition

public static class MessageBox: Object

Members Table

The following table lists the members exposed by the MessageBox object. Click a tab on the left to choose the type of member you want to view.

Methods

Method	Description
Equals	Overloaded. Compares two objects to determine if they are equal. (Inherited from Object)
GetHashCode	Serves as a hash function for a particular type, suitable for use in hashing algorithms and data structures like a hash table. (Inherited from Object)
GetType	Gets the Type of the current instance. (Inherited from Object)
ReferenceEquals	Determines whether the specified Object instances are the same instance. (Inherited from Object)
Show	Overloaded. Shows a MessageBox.
ToString	Returns a String that represents the current Object. (Inherited from Object)

Inheritance Hierarchy

Object

MessageBox

Examples

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// This sample shows how to display a message box.

 

using System;

using System.Drawing;

using System.Windows.Forms;

 

public class MyForm : Form

{

     Button button1;

     Label label1;

 

     public MyForm()

     {

          InitializeComponent();

     }

 

     private void InitializeComponent()

     {

          this.SuspendLayout();

 

          this.button1= new Button();

          this.button1.Text= "Show message box";

          this.button1.Width= 160;

          this.button1.Location= new Point(30,30);

          this.button1.Click += new EventHandler(on_click);

 

          this.label1= new Label();

          this.label1.Size= new Size(Application.Width-50,60);

          this.label1.Location= new Point(30,30+40);

          this.label1.Text= "The message box has not yet been displayed.";

 

          this.Controls.Add( this.button1 );

          this.Controls.Add( this.label1 );

 

          this.ResumeLayout(false);

     }

 

     private void on_click( object sender, EventArgs e )

     {

          // Note that the ShowDialog method is asynchronous and returns immediately.

          // To retrieve the dialog result, one must intercept the Closed event as

          // illustrated in this sample code.

 

          DialogResultListener drl;

 

          drl= MessageBox.Show( "You have pressed the button!",

                                "Simple Message Box",

                                MessageBoxButtons.OKCancel );

 

          drl.Closed += new EventHandler(on_msgbox_closed);

     }

 

     private void on_msgbox_closed( object sender, EventArgs e )

     {

          DialogResultListener drl= (DialogResultListener) sender;

          string res= "<unknow result>";

 

          if( drl.DialogResult == DialogResult.OK )

               res= "OK";

          else if( drl.DialogResult == DialogResult.Cancel )

               res= "Cancel";

 

          this.label1.Text= "The message box result is : " + res;

     }

 

     static void Main()

     {

          Application.Run( new MyForm() );

     }

}

 

Class Information

Namespace	System.Windows.Forms
Flash Library	System.Windows.Forms.scl
Flash Library Version	2.0.0.2118
Silverlight Library	System.Windows.Forms.dll