146 lines
7.0 KiB
C#
146 lines
7.0 KiB
C#
using System;
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using System.Drawing;
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using System.Runtime.InteropServices;
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namespace GeekDesk.Util
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{
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class SystemIcon
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{
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[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
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public struct SHFILEINFO
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{
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public IntPtr hIcon;
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public int iIcon;
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public uint dwAttributes;
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[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)]
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public string szDisplayName;
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[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 80)]
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public string szTypeName;
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}
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[DllImport("Shell32.dll", EntryPoint = "SHGetFileInfo", SetLastError = true, CharSet = CharSet.Auto)]
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public static extern IntPtr SHGetFileInfo(string pszPath, uint dwFileAttributes, ref SHFILEINFO psfi, uint cbFileInfo, uint uFlags);
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[DllImport("User32.dll", EntryPoint = "DestroyIcon")]
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public static extern int DestroyIcon(IntPtr hIcon);
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#region API 参数的常量定义
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public enum FileInfoFlags : uint
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{
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SHGFI_ICON = 0x000000100, // get icon
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SHGFI_DISPLAYNAME = 0x000000200, // get display name
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SHGFI_TYPENAME = 0x000000400, // get type name
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SHGFI_ATTRIBUTES = 0x000000800, // get attributes
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SHGFI_ICONLOCATION = 0x000001000, // get icon location
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SHGFI_EXETYPE = 0x000002000, // return exe type
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SHGFI_SYSICONINDEX = 0x000004000, // get system icon index
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SHGFI_LINKOVERLAY = 0x000008000, // put a link overlay on icon
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SHGFI_SELECTED = 0x000010000, // show icon in selected state
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SHGFI_ATTR_SPECIFIED = 0x000020000, // get only specified attributes
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SHGFI_LARGEICON = 0x000000000, // get large icon
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SHGFI_SMALLICON = 0x000000001, // get small icon
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SHGFI_OPENICON = 0x000000002, // get open icon
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SHGFI_SHELLICONSIZE = 0x000000004, // get shell size icon
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SHGFI_PIDL = 0x000000008, // pszPath is a pidl
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SHGFI_USEFILEATTRIBUTES = 0x000000010, // use passed dwFileAttribute
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SHGFI_ADDOVERLAYS = 0x000000020, // apply the appropriate overlays
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SHGFI_OVERLAYINDEX = 0x000000040 // Get the index of the overlay
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}
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public enum FileAttributeFlags : uint
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{
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FILE_ATTRIBUTE_READONLY = 0x00000001,
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FILE_ATTRIBUTE_HIDDEN = 0x00000002,
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FILE_ATTRIBUTE_SYSTEM = 0x00000004,
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FILE_ATTRIBUTE_DIRECTORY = 0x00000010,
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FILE_ATTRIBUTE_ARCHIVE = 0x00000020,
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FILE_ATTRIBUTE_DEVICE = 0x00000040,
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FILE_ATTRIBUTE_NORMAL = 0x00000080,
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FILE_ATTRIBUTE_TEMPORARY = 0x00000100,
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FILE_ATTRIBUTE_SPARSE_FILE = 0x00000200,
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FILE_ATTRIBUTE_REPARSE_POINT = 0x00000400,
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FILE_ATTRIBUTE_COMPRESSED = 0x00000800,
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FILE_ATTRIBUTE_OFFLINE = 0x00001000,
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FILE_ATTRIBUTE_NOT_CONTENT_INDEXED = 0x00002000,
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FILE_ATTRIBUTE_ENCRYPTED = 0x00004000
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}
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#endregion
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/// <summary>
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/// 获取文件类型的关联图标
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/// </summary>
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/// <param name="fileName">文件类型的扩展名或文件的绝对路径</param>
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/// <param name="isLargeIcon">是否返回大图标</param>
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/// <returns>获取到的图标</returns>
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public static Icon GetIcon(string fileName, bool isLargeIcon)
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{
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//SHFILEINFO shfi = new SHFILEINFO();
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//IntPtr hI;
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//if (isLargeIcon)
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// hI = SHGetFileInfo(fileName, 0, ref shfi, (uint)Marshal.SizeOf(shfi), (uint)FileInfoFlags.SHGFI_ICON | (uint)FileInfoFlags.SHGFI_USEFILEATTRIBUTES | (uint)FileInfoFlags.SHGFI_LARGEICON);
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//else
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// hI = SHGetFileInfo(fileName, 0, ref shfi, (uint)Marshal.SizeOf(shfi), (uint)FileInfoFlags.SHGFI_ICON | (uint)FileInfoFlags.SHGFI_USEFILEATTRIBUTES | (uint)FileInfoFlags.SHGFI_SMALLICON);
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//Icon icon = Icon.FromHandle(shfi.hIcon).Clone() as Icon;
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//DestroyIcon(shfi.hIcon); //释放资源
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//选中文件中的图标总数
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//var iconTotalCount = PrivateExtractIcons(fileName, 0, 0, 0, null, null, 1, 0);
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//用于接收获取到的图标指针
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//IntPtr[] hIcons = new IntPtr[1];
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////对应的图标id
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//int[] ids = new int[1];
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////成功获取到的图标个数
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//int successCount = PrivateExtractIcons(fileName, 0, 0, 0, hIcons, ids, 1, 0);
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//Icon ico = Icon.FromHandle(hIcons[0]);
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//var myIcon = ico.ToBitmap();
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//myIcon.Save("D:\\" + ids[0].ToString("000") + ".png", ImageFormat.Png);
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IntPtr hIcon = FileIcon.GetJumboIcon(FileIcon.GetIconIndex(fileName));
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//IntPtr hIcon = GetJumboIcon(GetIconIndex("*." + ext));
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// from native to managed
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Icon ico = Icon.FromHandle(hIcon);
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string path = "D:\\test\\" + System.Guid.NewGuid().ToString() + ".png";
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//using ( ico = (Icon)Icon.FromHandle(hIcon).Clone())
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//{
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// // save to file (or show in a picture box)
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// ico.ToBitmap().Save(path, ImageFormat.Png);
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//}
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//FileIcon.Shell32.DestroyIcon(hIcon); // don't forget to cleanup
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return ico;
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}
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/// <summary>
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/// 获取文件夹图标
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/// </summary>
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/// <returns>图标</returns>
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public static Icon GetDirectoryIcon(bool isLargeIcon)
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{
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SHFILEINFO _SHFILEINFO = new SHFILEINFO();
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IntPtr _IconIntPtr;
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if (isLargeIcon)
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{
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_IconIntPtr = SHGetFileInfo(@"", 0, ref _SHFILEINFO, (uint)Marshal.SizeOf(_SHFILEINFO), ((uint)FileInfoFlags.SHGFI_ICON | (uint)FileInfoFlags.SHGFI_LARGEICON));
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}
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else
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{
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_IconIntPtr = SHGetFileInfo(@"", 0, ref _SHFILEINFO, (uint)Marshal.SizeOf(_SHFILEINFO), ((uint)FileInfoFlags.SHGFI_ICON | (uint)FileInfoFlags.SHGFI_SMALLICON));
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}
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if (_IconIntPtr.Equals(IntPtr.Zero)) return null;
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Icon _Icon = System.Drawing.Icon.FromHandle(_SHFILEINFO.hIcon);
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return _Icon;
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}
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[DllImport("User32.dll")]
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public static extern int PrivateExtractIcons(
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string lpszFile, //file name
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int nIconIndex, //The zero-based index of the first icon to extract.
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int cxIcon, //The horizontal icon size wanted.
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int cyIcon, //The vertical icon size wanted.
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IntPtr[] phicon, //(out) A pointer to the returned array of icon handles.
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int[] piconid, //(out) A pointer to a returned resource identifier.
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int nIcons, //The number of icons to extract from the file. Only valid when *.exe and *.dll
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int flags //Specifies flags that control this function.
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);
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//[DllImport("User32.dll")]
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//public static extern bool DestroyIcon(
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// IntPtr hIcon //A handle to the icon to be destroyed. The icon must not be in use.
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// );
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}
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}
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