C# 获取系统文件图标

获取文件的图标

 this.Icon = GetFileIcon(@"c:\gdiplus.dll");

获取文件夹图标

 this.Icon = GetDirectoryIcon();    

全不代码

  
    

   
     [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; 
 } 
 
 
   
     ///
   
      
   
     <summary>
   
      
 
   
     ///
   
      返回系统设置的图标 
 
   
     ///
   
      
   
     </summary>
   
      
 
   
     ///
   
      
   
     <param name="pszPath">
   
     文件路径 如果为"" 返回文件夹的
   
     </param>
   
      
 
   
     ///
   
      
   
     <param name="dwFileAttributes">
   
     0
   
     </param>
   
      
 
   
     ///
   
      
   
     <param name="psfi">
   
     结构体
   
     </param>
   
      
 
   
     ///
   
      
   
     <param name="cbSizeFileInfo">
   
     结构体大小
   
     </param>
   
      
 
   
     ///
   
      
   
     <param name="uFlags">
   
     枚举类型
   
     </param>
   
      
 
   
     ///
   
      
   
     <returns>
   
     -1失败
   
     </returns>
   
      
   
     

   
      [DllImport(
   
     "
   
     shell32.dll
   
     "
   
     )] 
 
   
     public
   
      
   
     static
   
      
   
     extern
   
      IntPtr SHGetFileInfo(
   
     string
   
      pszPath, 
   
     uint
   
      dwFileAttributes, 
   
     ref
   
      SHFILEINFO psfi, 
   
     uint
   
      cbSizeFileInfo, 
   
     uint
   
      uFlags); 
 
 
   
     public
   
      
   
     enum
   
      SHGFI 
 { 
 SHGFI_ICON 
   
     =
   
      
   
     0x100
   
     , 
 SHGFI_LARGEICON 
   
     =
   
      
   
     0x0
   
     , 
 SHGFI_USEFILEATTRIBUTES 
   
     =
   
      
   
     0x10
   
      
 } 
 
 
 
   
     ///
   
      
   
     <summary>
   
      
 
   
     ///
   
      获取文件图标 [email protected] qq:116149 
 
   
     ///
   
      
   
     </summary>
   
      
 
   
     ///
   
      
   
     <param name="p_Path">
   
     文件全路径
   
     </param>
   
      
 
   
     ///
   
      
   
     <returns>
   
     图标
   
     </returns>
   
      
   
     

   
      
   
     public
   
      
   
     static
   
      Icon GetFileIcon(
   
     string
   
      p_Path) 
 { 
 SHFILEINFO _SHFILEINFO 
   
     =
   
      
   
     new
   
      SHFILEINFO(); 
 IntPtr _IconIntPtr 
   
     =
   
      SHGetFileInfo(p_Path, 
   
     0
   
     , 
   
     ref
   
      _SHFILEINFO, (
   
     uint
   
     )Marshal.SizeOf(_SHFILEINFO), (
   
     uint
   
     )(SHGFI.SHGFI_ICON 
   
     |
   
      SHGFI.SHGFI_LARGEICON 
   
     |
   
      SHGFI.SHGFI_USEFILEATTRIBUTES)); 
 
   
     if
   
      (_IconIntPtr.Equals(IntPtr.Zero)) 
   
     return
   
      
   
     null
   
     ; 
 Icon _Icon 
   
     =
   
      System.Drawing.Icon.FromHandle(_SHFILEINFO.hIcon); 
 
   
     return
   
      _Icon; 
 } 
 
   
     ///
   
      
   
     <summary>
   
      
 
   
     ///
   
      获取文件夹图标 [email protected] qq:116149 
 
   
     ///
   
      
   
     </summary>
   
      
 
   
     ///
   
      
   
     <returns>
   
     图标
   
     </returns>
   
      
   
     

   
      
   
     public
   
      
   
     static
   
      Icon GetDirectoryIcon() 
 { 
 SHFILEINFO _SHFILEINFO 
   
     =
   
      
   
     new
   
      SHFILEINFO(); 
 IntPtr _IconIntPtr 
   
     =
   
      SHGetFileInfo(
   
     @""
   
     , 
   
     0
   
     , 
   
     ref
   
      _SHFILEINFO, (
   
     uint
   
     )Marshal.SizeOf(_SHFILEINFO), (
   
     uint
   
     )(SHGFI.SHGFI_ICON 
   
     |
   
      SHGFI.SHGFI_LARGEICON)); 
 
   
     if
   
      (_IconIntPtr.Equals(IntPtr.Zero)) 
   
     return
   
      
   
     null
   
     ; 
 Icon _Icon 
   
     =
   
      System.Drawing.Icon.FromHandle(_SHFILEINFO.hIcon); 
 
   
     return
   
      _Icon; 
 }