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C#获取应用程序图标获取后在保存成ICO文件

2011-04-25 14:17  观海看云  阅读(4901)  评论(0编辑  收藏  举报
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.IO;

namespace WindowsApplication1
{
    
public partial class Form1 : Form
    {
        
public Form1()
        {
            InitializeComponent();
        }
        [StructLayout(LayoutKind.Sequential)]
        
public struct SHFILEINFO
        {
            
public IntPtr hIcon;
            
public IntPtr iIcon;
            
public uint dwAttributes;
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst 
= 260)]
            
public string szDisplayName;
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst 
= 80)]
            
public string szTypeName;
        };
        
class Win32
        {
            
public const uint SHGFI_ICON = 0x100;
            
public const uint SHGFI_LARGEICON = 0x0// 'Large icon
            public const uint SHGFI_SMALLICON = 0x1// 'Small icon
            [DllImport("shell32.dll")]
            
public static extern IntPtr SHGetFileInfo(string pszPath, uint dwFileAttributes, ref SHFILEINFO psfi, uint cbSizeFileInfo, uint uFlags);
            [DllImport(
"shell32.dll")]
            
public static extern uint ExtractIconEx(string lpszFile, int nIconIndex, int[] phiconLarge, int[] phiconSmall, uint nIcons);
        }
        
private void button1_Click(object sender, EventArgs e)
        {
            openFileDialog1.ShowDialog();
            SHFILEINFO shinfo 
= new SHFILEINFO();
            Win32.SHGetFileInfo(openFileDialog1.FileName, 
0ref shinfo, (uint)Marshal.SizeOf(shinfo), Win32.SHGFI_ICON | Win32.SHGFI_LARGEICON);
            Icon myIcon 
= Icon.FromHandle(shinfo.hIcon);
            FileStream fileStream 
= new FileStream("E:\\1.ico",FileMode.Create);
            myIcon.Save(fileStream);
            fileStream.Close();
        } 
    }
}