squareint.cs

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// Fig. 6.3: SquareInt.cs
// Demonstrates a programmer-defined Square method.
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace SquareInt
{
   /// <summary>
   /// Summary description for Form1.
   /// </summary>
   public class SquareInt : System.Windows.Forms.Form
   {
      private System.Windows.Forms.Button calculateButton;
      private System.Windows.Forms.Label outputLabel;
      /// <summary>
      /// Required designer variable.
      /// </summary>
      private System.ComponentModel.Container components = null;

      public SquareInt()
      {
         //
         // Required for Windows Form Designer support
         //
         InitializeComponent();

         //
         // TODO: Add any constructor code after InitializeComponent call
         //
      }

      /// <summary>
      /// Clean up any resources being used.
      /// </summary>
      protected override void Dispose( bool disposing )
      {
         if( disposing )
         {
            if (components != null) 
            {
               components.Dispose();
            }
         }
         base.Dispose( disposing );
      }

      #region Windows Form Designer generated code
      /// <summary>
      /// Required method for Designer support - do not modify
      /// the contents of this method with the code editor.
      /// </summary>
      private void InitializeComponent()
      {
         this.calculateButton = new System.Windows.Forms.Button();
         this.outputLabel = new System.Windows.Forms.Label();
         this.SuspendLayout();
         // 
         // calculateButton
         // 
         this.calculateButton.Location = new System.Drawing.Point(32, 8);
         this.calculateButton.Name = "calculateButton";
         this.calculateButton.Size = new System.Drawing.Size(120, 23);
         this.calculateButton.TabIndex = 0;
         this.calculateButton.Text = "Calculate Squares";
         this.calculateButton.Click += new System.EventHandler(this.calculateButton_Click);
         // 
         // outputLabel
         // 
         this.outputLabel.Location = new System.Drawing.Point(16, 48);
         this.outputLabel.Name = "outputLabel";
         this.outputLabel.Size = new System.Drawing.Size(152, 144);
         this.outputLabel.TabIndex = 1;
         // 
         // SquareInt
         // 
         this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
         this.ClientSize = new System.Drawing.Size(184, 197);
         this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                      this.outputLabel,
                                                                      this.calculateButton});
         this.Name = "SquareInt";
         this.Text = "SquareInt";
         this.ResumeLayout(false);

      }
      #endregion

      /// <summary>
      /// The main entry point for the application.
      /// </summary>
      [STAThread]
      static void Main() 
      {
         Application.Run(new SquareInt());
      }

      // Square method definition
      int Square( int y )
      {
         return y * y; // return square of y

      } // end method Square

      private void calculateButton_Click(object sender, System.EventArgs e)
      {
         outputLabel.Text = "";

         // loop 10 times
         for ( int counter = 1; counter <= 10; counter++ )
         {
            // calculate square of counter and store in result
            int result = Square( counter );

            // append result to outputLabel
            outputLabel.Text += "The square of " + counter + 
               " is " + result + "\n";
         }        

      } // end method calculateButton_Click

   } // end of class SquareInt
}