C 文件图标 C#中怎样获取文件图标
提里科留斯 人气:0想了解C#中怎样获取文件图标的相关内容吗,提里科留斯在本文为您仔细讲解C 文件图标的相关知识和一些Code实例,欢迎阅读和指正,我们先划重点:c中怎样获取文件图标,c获取图标,下面大家一起来学习吧。
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, 0, ref shfi, (uint)Marshal.SizeOf(shfi), (uint)FileInfoFlags.SHGFI_ICON | (uint)FileInfoFlags.SHGFI_USEFILEATTRIBUTES | (uint)FileInfoFlags.SHGFI_LARGEICON); else hI = SHGetFileInfo(fileName, 0, ref shfi, (uint)Marshal.SizeOf(shfi), (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(@"", 0, ref _SHFILEINFO, (uint)Marshal.SizeOf(_SHFILEINFO), ((uint)FileInfoFlags.SHGFI_ICON | (uint)FileInfoFlags.SHGFI_LARGEICON)); } else { _IconIntPtr = SHGetFileInfo(@"", 0, ref _SHFILEINFO, (uint)Marshal.SizeOf(_SHFILEINFO), ((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; } } }
加载全部内容