C#中若何獲得文件圖標。本站提示廣大學習愛好者:(C#中若何獲得文件圖標)文章只能為提供參考,不一定能成為您想要的結果。以下是C#中若何獲得文件圖標正文
本文給年夜家引見若何去獲得一個文件的聯系關系圖標呢?現總結以下:
起首明白成績:獲得一個文件的聯系關系圖標或許是某個類型文件的顯示圖標。
在網上搜了一圈,發明辦法照樣比擬多的,然則運用C#停止獲得的辦法不多。我選擇一種用.Net庫的辦法。
應用的類:
System.Drawing.Icon ,位於System.Drawing 定名空間。
詳細辦法:
System.Drawing.Icon 類中的靜態辦法:public static Icon ExtractAssociatedIcon(string filePath)
此辦法吸收一個文件途徑,前往一個 Icon 類型的對象。此對象既是指定文件的 Icon 圖標對象。
此 Icon 類供給了 Save 辦法,可以將 Icon 文件寫入流中,進而保留至硬盤文件。
固然要在法式中顯示也是可以的,Icon 類供給了 ToBitmap 辦法,可以將 Icon 文件轉換為 Bitmap。Bitmap 便可以在 PictureBox 中顯示了。
假如要依據後綴名來獲得文件圖標,那要怎樣辦呢?我想了一個比擬笨的方法。看代碼~
string fileName = "tmp." + houzhuiming; File.Create(fileName).Close(); Image img = System.Drawing.Icon.ExtractAssociatedIcon(fileName).ToBitmap(); File.Delete(fileName);
如斯,新建一個指定後綴名的文件,獲得圖標後直接刪除,就可以取得指定文件後綴名的圖標了。嘻嘻~
上面給年夜家分享一段代碼引見C#獲得文件聯系關系圖標
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 參數的常量界說 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> /// 獲得文件類型的聯系關系圖標 /// </summary> /// <param name="fileName">文件類型的擴大名或文件的相對途徑</param> /// <param name="isLargeIcon">能否前往年夜圖標</param> /// <returns>獲得到的圖標</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); //釋放資本 return icon; } /// <summary> /// 獲得文件夾圖標 /// </summary> /// <returns>圖標</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; } } }