asp.Netアイコン抽出およびアイコン変換のインスタンスコード

 
  
using System; 
  
using System.Collections.Generic; 
  
using System.Drawing; 
  
using System.Windows.Forms; 
  
using System.IO; 
  
using System.Resources; 
  
using System.Reflection; 
  
using System.Runtime.InteropServices; 
   
  

namespace newExtIcon
{
    public partial class MainForm : Form
    {    
        public Assembly asm = Assembly.GetExecutingAssembly();
        public MainForm()
        {
            InitializeComponent();        
        }

        void MainForm_Load(object sender ,EventArgs e)
        {
            lbl_display.Text ="No Work !";    

        }

        void btnExtractClick(object sender, EventArgs e)
        {
            Random rd = new Random();
            openFileDialog1.Filter="    |*.dll;*.exe|    |*.*";
            if(openFileDialog1.ShowDialog()== DialogResult.OK)
            {
                Icon icon = Icon.ExtractAssociatedIcon(openFileDialog1.FileName);
                FileStream fileStream = new FileStream("d:\\"+rd.Next(1,100000)+".ico",FileMode.Create);
                icon.Save(fileStream);
                fileStream.Close();        
                lbl_display.Text="Work Done!";
            }
            else
            {
                return ;
            }
        }

        void BtnChangeClick(object sender, EventArgs e)
        {
            Size sz = new Size(32,32);
            Random rd = new Random();
            openFileDialog1.Filter="  |*.jpg;*.png;*.bmp|    |*.*";
            //openFileDialog1.Filter="  |*.jpg;*.png;*.bmp|    |*.dll;*.exe";
            if(openFileDialog1.ShowDialog()== DialogResult.OK)
            {
                using(Bitmap bm = new Bitmap(openFileDialog1.FileName))
                {
                    using(Bitmap IconBM = new Bitmap(bm,sz))
                    {
                        using(Icon icon_t = Icon.FromHandle(IconBM.GetHicon()))
                        {
                            FileStream fileStream = new FileStream("d:\\"+rd.Next(1,100000)+".ico",FileMode.Create);
                            icon_t.Save(fileStream);
                            fileStream.Close();    
                            lbl_display.Text="Work Done!";         
                        }
                    }
                }
            }
            else
            {
                return ;
            }

        }
        void Pic_Click(object sender, System.EventArgs e)
        {
            int int_index = Convert.ToInt32(((PictureBox)sender).Tag) ;
            switch(int_index)
            {
                case 1:
                    this.Close();
                    Application.Exit();
                    break;
                case 2:
                    WindowState = FormWindowState.Minimized;
                    break;
                default :
                    break;

            }

        }
 
  
        void Pic_Hover(object sender,EventArgs e)
        {
            string  name_1 = "btn_close_hightligth.png";
            string name_2 ="btn_mini_highlight.png";
            Bitmap bm_1 = new Bitmap(asm.GetManifestResourceStream(name_1));
            Bitmap bm_2 = new Bitmap(asm.GetManifestResourceStream(name_2));
            int int_index = Convert.ToInt32(((PictureBox)sender).Tag) ;
            switch(int_index)
            {
                case 1:
                    pictureBox1.BackgroundImage=bm_1;
                    break;
                case 2:
                    pictureBox2 .BackgroundImage = bm_2;
                    break;
                default :
                    break;

            }
        }
        void Pic_Leave(object sender,EventArgs e)
        {
            string  name_1 = "btn_close_down.png";
            string  name_2 ="btn_mini_down.png";
            Bitmap bm_1 = new Bitmap(asm.GetManifestResourceStream(name_1));
            Bitmap bm_2 = new Bitmap(asm.GetManifestResourceStream(name_2));
            //GetMainfestResourceStream     
            int int_index = Convert.ToInt32(((PictureBox)sender).Tag) ;
            switch(int_index)
            {
                case 1:
                    pictureBox1.BackgroundImage=bm_1;
                    break;
                case 2:
                    pictureBox2 .BackgroundImage = bm_2;
                    break;
                default :
                    break;

            }
        }

        private const int WM_NCLBUTTONDOWN = 0xA1; 
        private const int HTCAPTION = 2; 

        [DllImport("user32.dll")] 
        private static extern int SendMessage (int hwnd, int wMsg, int wParam, int lParam); 

        [DllImport("user32.dll")] 
        private static extern int ReleaseCapture(); 

        private void form_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e) 
        { 
            //               
            ReleaseCapture(); 
            //    ，                 
            SendMessage((int)this.Handle,WM_NCLBUTTONDOWN,HTCAPTION,0); 
        } 
    }
}