asp.net 图标提取以及图标转换的实例代码

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="应用程序|*.dll;*.exe|所有程序|*.*";
 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="图片|*.jpg;*.png;*.bmp|所有程序|*.*";
 //openFileDialog1.Filter="图片|*.jpg;*.png;*.bmp|应用程序|*.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获取的是流
 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) 
 { 
 //为当前的应用程序释放鼠标捕获 
 ReleaseCapture(); 
 //发送消息，让系统误以为你在标题拦上按下鼠标 
 SendMessage((int)this.Handle,WM_NCLBUTTONDOWN,HTCAPTION,0); 
 } 
 }
}

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