form1.cs

《c#技术内幕代码》

namespace ch9_12
{
    using System;
    using System.Drawing;
    using System.Collections;
    using System.ComponentModel;
    using System.Windows.Forms;
    using System.Data;

    /// <summary>
    ///    Summary description for Form1.
    /// </summary>
    public class Form1 : System.Windows.Forms.Form
    {
        /// <summary>
        ///    Required designer variable.
        /// </summary>
        private System.ComponentModel.Container components;
		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.RadioButton radioButton2;
		private System.Windows.Forms.RadioButton radioButton1;
		private System.Windows.Forms.ListBox listBox1;

        public Form1()
        {
            //
            // Required for Windows Form Designer support
            //
            InitializeComponent();

			this.listBox1.Items.Add("String 1");
			this.listBox1.Items.Add("String 2");
			this.listBox1.Items.Add("String 3");
			this.listBox1.Items.Add("String 4");

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

        /// <summary>
        ///    Clean up any resources being used.
        /// </summary>
        public override void Dispose()
        {
            base.Dispose();
            components.Dispose();
        }

        /// <summary>
        ///    Required method for Designer support - do not modify
        ///    the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
		{
			this.components = new System.ComponentModel.Container ();
			this.button1 = new System.Windows.Forms.Button ();
			this.radioButton2 = new System.Windows.Forms.RadioButton ();
			this.radioButton1 = new System.Windows.Forms.RadioButton ();
			this.listBox1 = new System.Windows.Forms.ListBox ();
			//@this.TrayHeight = 0;
			//@this.TrayLargeIcon = false;
			//@this.TrayAutoArrange = true;
			button1.Location = new System.Drawing.Point (280, 424);
			button1.Size = new System.Drawing.Size (75, 23);
			button1.TabIndex = 3;
			button1.Text = "&Close";
			button1.Click += new System.EventHandler (this.button1_Click);
			radioButton2.Location = new System.Drawing.Point (152, 368);
			radioButton2.Text = "Change Color";
			radioButton2.Size = new System.Drawing.Size (280, 23);
			radioButton2.TabIndex = 2;
			radioButton2.CheckedChanged += new System.EventHandler (this.radioButton2_CheckedChanged);
			radioButton1.Location = new System.Drawing.Point (152, 344);
			radioButton1.Text = "Change Font";
			radioButton1.Size = new System.Drawing.Size (280, 23);
			radioButton1.TabIndex = 1;
			radioButton1.CheckedChanged += new System.EventHandler (this.radioButton1_CheckedChanged);
			listBox1.Location = new System.Drawing.Point (120, 24);
			listBox1.Size = new System.Drawing.Size (392, 289);
			listBox1.DrawMode = System.Windows.Forms.DrawMode.OwnerDrawFixed;
			listBox1.TabIndex = 0;
			listBox1.DrawItem += new System.Windows.Forms.DrawItemEventHandler (this.listBox1_DrawItem);
			listBox1.SelectedIndexChanged += new System.EventHandler (this.listBox1_SelectedIndexChanged);
			this.Text = "Form1";
			this.AutoScaleBaseSize = new System.Drawing.Size (5, 13);
			this.ClientSize = new System.Drawing.Size (648, 517);
			this.Controls.Add (this.button1);
			this.Controls.Add (this.radioButton2);
			this.Controls.Add (this.radioButton1);
			this.Controls.Add (this.listBox1);
		}

		protected void listBox1_SelectedIndexChanged (object sender, System.EventArgs e)
		{
            this.listBox1.Refresh();
		}

		protected void button1_Click (object sender, System.EventArgs e)
		{
            Close();
		}

		protected void radioButton2_CheckedChanged (object sender, System.EventArgs e)
		{
            this.listBox1.Refresh();
		}

		protected void radioButton1_CheckedChanged (object sender, System.EventArgs e)
		{
            this.listBox1.Refresh();
		}

		protected void listBox1_DrawItem (object sender, System.Windows.Forms.DrawItemEventArgs e)
		{
            // Get the text
			string text = (string)this.listBox1.Items[e.Index];

			// If it is selected, make it capitalized
			if ( e.Index == this.listBox1.SelectedIndex )
			{
				string temp = "";
				for ( int i=0; i<text.Length; ++i)
				{
				   temp += Char.ToUpper(text[i]);
				}
				text = temp;
			}

			// Clear the drawing region
			e.Graphics.FillRectangle( new SolidBrush(System.Drawing.Color.White), e.Bounds );

			// Determine if we are changing the font or the color
			if ( this.radioButton1.Checked )
			{
				Font myFont = new Font("Arial", 14);
				e.Graphics.DrawString( text, myFont, new SolidBrush( System.Drawing.Color.Black), e.Bounds );
			}
			else
				if ( this.radioButton2.Checked )
			    {
				   e.Graphics.DrawString( text, Font, new SolidBrush( System.Drawing.Color.Blue), e.Bounds );
			    }
			    else
			    {
				   e.Graphics.DrawString( text, Font, new SolidBrush( System.Drawing.Color.Black), e.Bounds );
			    }
			
		}

        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        public static void Main(string[] args) 
        {
            Application.Run(new Form1());
        }
    }
}