C#中如何获取文件图标
本文给大家介绍如何去获取一个文件的关联图标呢?现总结如下: 首先明确问题:获取一个文件的关联图标或者是某个类型文件的显示图标。 在网上搜了一圈,发现方法还是比较多的,但是应用C#进行获取的方法不多。我选择一种用.Net库的方法。 使用的类: System.Drawing.Icon ,位于System.Drawing 命名空间。 具体方法: System.Drawing.Icon 类中的静态方法:public static Icon ExtractAssociatedIcon(string filePath) 此方法接收一个文件路径,返回一个 Icon 类型的对象。此对象既是指定文件的 Icon 图标对象。 此 Icon 类提供了 Save 方法,可以将 Icon 文件写入流中,进而保存至硬盘文件。 当然要在程序中显示也是可以的,Icon 类提供了 ToBitmap 方法,可以将 Icon 文件转换为 Bitmap。Bitmap 就可以在 PictureBox 中显示了。 如果要根据后缀名来获取文件图标,那要怎么办呢?我想了一个比较笨的办法。看代码~ string fileName = "tmp." + houzhuiming; File.Create(fileName).Close(); Image img = System.Drawing.Icon.ExtractAssociatedIcon(fileName).ToBitmap(); File.Delete(fileName); 如此,新建一个指定后缀名的文件,获取图标后直接删除,就能获得指定文件后缀名的图标了。嘻嘻~ 下面给大家分享一段代码介绍C#获取文件关联图标 using System; using System.Collections.Generic; using System.Text; using System.Runtime.InteropServices; using System.Drawing; using Microsoft.Win32; namespace ifmdp.DeviceManager { class SystemIcon { [StructLayout(LayoutKind.Sequential,CharSet = CharSet.Auto)] public struct SHFILEINFO { public IntPtr hIcon; public int iIcon; public uint dwAttributes; [MarshalAs(UnmanagedType.ByValTStr,SizeConst = 260)] public string szDisplayName; [MarshalAs(UnmanagedType.ByValTStr,SizeConst = 80)] public string szTypeName; } [DllImport("Shell32.dll",EntryPoint = "SHGetFileInfo",SetLastError = true,CharSet = CharSet.Auto)] public static extern IntPtr SHGetFileInfo(string pszPath,uint dwFileAttributes,ref SHFILEINFO psfi,uint cbFileInfo,uint uFlags); [DllImport("User32.dll",EntryPoint = "DestroyIcon")] public static extern int DestroyIcon(IntPtr hIcon); #region API 参数的常量定义 public enum FileInfoFlags : uint { SHGFI_ICON = 0x000000100,// get icon SHGFI_DISPLAYNAME = 0x000000200,// get display name SHGFI_TYPENAME = 0x000000400,// get type name SHGFI_ATTRIBUTES = 0x000000800,// get attributes SHGFI_ICONLOCATION = 0x000001000,// get icon location SHGFI_EXETYPE = 0x000002000,// return exe type SHGFI_SYSICONINDEX = 0x000004000,// get system icon index SHGFI_LINKOVERLAY = 0x000008000,// put a link overlay on icon SHGFI_SELECTED = 0x000010000,// show icon in selected state SHGFI_ATTR_SPECIFIED = 0x000020000,// get only specified attributes SHGFI_LARGEICON = 0x000000000,// get large icon SHGFI_SMALLICON = 0x000000001,// get small icon SHGFI_OPENICON = 0x000000002,// get open icon SHGFI_SHELLICONSIZE = 0x000000004,// get shell size icon SHGFI_PIDL = 0x000000008,// pszPath is a pidl SHGFI_USEFILEATTRIBUTES = 0x000000010,// use passed dwFileAttribute SHGFI_ADDOVERLAYS = 0x000000020,// apply the appropriate overlays SHGFI_OVERLAYINDEX = 0x000000040 // Get the index of the overlay } public enum FileAttributeFlags : uint { FILE_ATTRIBUTE_READONLY = 0x00000001,FILE_ATTRIBUTE_HIDDEN = 0x00000002,FILE_ATTRIBUTE_SYSTEM = 0x00000004,FILE_ATTRIBUTE_DIRECTORY = 0x00000010,FILE_ATTRIBUTE_ARCHIVE = 0x00000020,FILE_ATTRIBUTE_DEVICE = 0x00000040,FILE_ATTRIBUTE_NORMAL = 0x00000080,FILE_ATTRIBUTE_TEMPORARY = 0x00000100,FILE_ATTRIBUTE_SPARSE_FILE = 0x00000200,FILE_ATTRIBUTE_REPARSE_POINT = 0x00000400,FILE_ATTRIBUTE_COMPRESSED = 0x00000800,FILE_ATTRIBUTE_OFFLINE = 0x00001000,FILE_ATTRIBUTE_NOT_CONTENT_INDEXED = 0x00002000,FILE_ATTRIBUTE_ENCRYPTED = 0x00004000 } #endregion /// <summary> /// 获取文件类型的关联图标 /// </summary> /// <param name="fileName">文件类型的扩展名或文件的绝对路径</param> /// <param name="isLargeIcon">是否返回大图标</param> /// <returns>获取到的图标</returns> public static Icon GetIcon(string fileName,bool isLargeIcon) { SHFILEINFO shfi = new SHFILEINFO(); IntPtr hI; if (isLargeIcon) hI = SHGetFileInfo(fileName,ref shfi,(uint)Marshal.SizeOf(shfi),(uint)FileInfoFlags.SHGFI_ICON | (uint)FileInfoFlags.SHGFI_USEFILEATTRIBUTES | (uint)FileInfoFlags.SHGFI_LARGEICON); else hI = SHGetFileInfo(fileName,(uint)FileInfoFlags.SHGFI_ICON | (uint)FileInfoFlags.SHGFI_USEFILEATTRIBUTES | (uint)FileInfoFlags.SHGFI_SMALLICON); Icon icon = Icon.FromHandle(shfi.hIcon).Clone() as Icon; DestroyIcon(shfi.hIcon); //释放资源 return icon; } /// <summary> /// 获取文件夹图标 /// </summary> /// <returns>图标</returns> public static Icon GetDirectoryIcon(bool isLargeIcon) { SHFILEINFO _SHFILEINFO = new SHFILEINFO(); IntPtr _IconIntPtr; if (isLargeIcon) { _IconIntPtr = SHGetFileInfo(@"",ref _SHFILEINFO,(uint)Marshal.SizeOf(_SHFILEINFO),((uint)FileInfoFlags.SHGFI_ICON | (uint)FileInfoFlags.SHGFI_LARGEICON)); } else { _IconIntPtr = SHGetFileInfo(@"",((uint)FileInfoFlags.SHGFI_ICON | (uint)FileInfoFlags.SHGFI_SMALLICON)); } if (_IconIntPtr.Equals(IntPtr.Zero)) return null; Icon _Icon = System.Drawing.Icon.FromHandle(_SHFILEINFO.hIcon); return _Icon; } } } (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |