WPF 获取指定文件的Icon-白红宇

WPF 获取指定文件的Icon

阅读量：4687 次

发布时间：2019-06-09

本文共 2309 字，大约阅读时间需要 7 分钟。

C#           var icon = System.Drawing.Icon.ExtractAssociatedIcon(@"filepath");            var m = new MemoryStream();            icon.Save(m);            var bitmapiamge = new BitmapImage();            bitmapiamge.BeginInit();            bitmapiamge.StreamSource = m;            bitmapiamge.EndInit();            this.Icon = bitmapiamge;

shell32.dll

public class IconExt{    [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;    }    ///       /// 返回系统设置的图标      /// 
      /// 文件路径 如果为""  返回文件夹的      /// 0      /// 结构体      /// 结构体大小      /// 枚举类型      /// 
     
      -1失败
           [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    }    ///       /// 获取文件图标     /// 
      /// 文件全路径      /// 
     
      图标
           public static System.Drawing.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;        System.Drawing.Icon _Icon = System.Drawing.Icon.FromHandle(_SHFILEINFO.hIcon);        return _Icon;    }    ///       /// 获取文件夹图标     /// 
      /// 
     
      图标
           public static System.Drawing.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;        System.Drawing.Icon _Icon = System.Drawing.Icon.FromHandle(_SHFILEINFO.hIcon);        return _Icon;    }}