갤러리정

Button click action

/*
C#  Programming  Tips  &  Techniques
by  Charles  Wright,  Kris  Jamsa

Publisher:  Osborne/McGraw-Hill  (December  28,  2001)
ISBN:  0072193794
*/
using  System;
using  System.Drawing;
using  System.Collections;
using  System.ComponentModel;
using  System.Windows.Forms;
using  System.Data;

namespace  AddControls
{
    ///  <summary>
    ///  Summary  description  for  FormAddControls.
    ///  </summary>
    public  class  FormAddControls  :  System.Windows.Forms.Form
    {
        private  System.Windows.Forms.ListBox  listBox1;
        private  System.Windows.Forms.Button  button1;
        private  System.Windows.Forms.TextBox  textBox1;
        private  System.Windows.Forms.Button  button2;
        ///  <summary>
        ///  Required  designer  variable.
        ///  </summary>
        private  System.ComponentModel.Container  components  =  null;

        public  FormAddControls()
        {
            //
            //  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.textBox1  =  new  System.Windows.Forms.TextBox();
            this.button1  =  new  System.Windows.Forms.Button();
            this.button2  =  new  System.Windows.Forms.Button();
            this.listBox1  =  new  System.Windows.Forms.ListBox();
            this.SuspendLayout();
            //  
            //  textBox1
            //  
            this.textBox1.Location  =  new  System.Drawing.Point(38,  200);
            this.textBox1.Name  =  "textBox1";
            this.textBox1.Size  =  new  System.Drawing.Size(216,  20);
            this.textBox1.TabIndex  =  1;
            this.textBox1.Text  =  "";
            //  
            //  button1
            //  
            this.button1.Location  =  new  System.Drawing.Point(48,  240);
            this.button1.Name  =  "button1";
            this.button1.Size  =  new  System.Drawing.Size(80,  24);
            this.button1.TabIndex  =  2;
            this.button1.Text  =  "Add  Item";
            this.button1.Click  +=  new  System.EventHandler(this.button1_Click);
            this.button1.MouseEnter  +=  new  System.EventHandler(this.Buttons_OnMouseEnter);
            this.button1.MouseLeave  +=  new  System.EventHandler(this.Buttons_OnMouseLeave);
            //  
            //  button2
            //  
            this.button2.Location  =  new  System.Drawing.Point(160,  240);
            this.button2.Name  =  "button2";
            this.button2.Size  =  new  System.Drawing.Size(96,  24);
            this.button2.TabIndex  =  3;
            this.button2.Text  =  "Cancel";
            this.button2.Click  +=  new  System.EventHandler(this.button2_Click);
            this.button2.MouseEnter  +=  new  System.EventHandler(this.Buttons_OnMouseEnter);
            this.button2.MouseLeave  +=  new  System.EventHandler(this.Buttons_OnMouseLeave);
            //  
            //  listBox1
            //  
            this.listBox1.Location  =  new  System.Drawing.Point(38,  32);
            this.listBox1.Name  =  "listBox1";
            this.listBox1.Size  =  new  System.Drawing.Size(216,  147);
            this.listBox1.TabIndex  =  0;
            //  
            //  FormAddControls
            //  
            this.AutoScaleBaseSize  =  new  System.Drawing.Size(5,  13);
            this.ClientSize  =  new  System.Drawing.Size(292,  273);
            this.Controls.AddRange(new  System.Windows.Forms.Control[]  {
                                                                            this.button2,
                                                                            this.button1,
                                                                            this.textBox1,
                                                                            this.listBox1});
            this.Name  =  "FormAddControls";
            this.Text  =  "FormAddControls";
            this.ResumeLayout(false);

        }
        #endregion

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

        private  void  button1_Click(object  sender,  System.EventArgs  e)
        {
            if  (textBox1.Text  ==  "")
                return;
            string  strAdd  =  textBox1.Text;
            if  (listBox1.FindString  (strAdd,  -1)  <  0)
            {
                listBox1.Items.Add  (strAdd);
                textBox1.Text  =  "";
                textBox1.Focus  ();
                return;
            }
            MessageBox.Show  ("\""  +  strAdd  +  "\"  is  already  in  the  list  box",  "Duplicate");
        }

        private  void  button2_Click(object  sender,  System.EventArgs  e)
        {
            Application.Exit();
        }

        private  void  Buttons_OnMouseEnter(object  sender,  System.EventArgs  e)
        {
            Button  btn  =  (Button)  sender;
            btn.BackColor  =  Color.LightGray;
        }

        private  void  Buttons_OnMouseLeave(object  sender,  System.EventArgs  e)
        {
            Button  btn  =  (Button)  sender;
            btn.BackColor  =  SystemColors.Control;
        }
    }
}