C# 获取文件对应的系统ICO图标

using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using System.Runtime.InteropServices;
namespace MyData.Inc
{
class FileIcon_Class
{
/// <summary>
/// 获取文件对应的ICO图标
/// </summary>
class FileIcon
{
[DllImport("Shell32.dll")]
private static extern int SHGetFileInfo
(
string pszPath,
uint dwFileAttributes,
out SHFILEINFO psfi,
uint cbfileInfo,
SHGFI uFlags
);
[StructLayout(LayoutKind.Sequential)]
private struct SHFILEINFO
{
public SHFILEINFO(bool b)
{
hIcon = IntPtr.Zero; iIcon = 0; dwAttributes = 0; szDisplayName = ""; szTypeName = "";
}
public IntPtr hIcon;
public int iIcon;
public uint dwAttributes;
[MarshalAs(UnmanagedType.LPStr, SizeConst = 260)]
public string szDisplayName;
[MarshalAs(UnmanagedType.LPStr, SizeConst = 80)]
public string szTypeName;
};
private enum SHGFI
{
SmallIcon = 0x00000001,
LargeIcon = 0x00000000,
Icon = 0x00000100,
DisplayName = 0x00000200,
Typename = 0x00000400,
SysIconIndex = 0x00004000,
UseFileAttributes = 0x00000010
}
//获取文件Icon图标【函数】GetFileIcon(文件名,是否大图标)
public static Icon GetFileIcon(string fileName, bool largeIcon)
{
SHFILEINFO info = new SHFILEINFO(true);
int cbFileInfo = Marshal.SizeOf(info);
SHGFI flags;
if (largeIcon)
flags = SHGFI.Icon | SHGFI.LargeIcon | SHGFI.UseFileAttributes; //大图标
else
flags = SHGFI.Icon | SHGFI.SmallIcon | SHGFI.UseFileAttributes; //小图标
SHGetFileInfo(fileName, 256, out info, (uint)cbFileInfo, flags);
return Icon.FromHandle(info.hIcon);
}
}
}
}