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84 lines
No EOL
3.2 KiB
C#
84 lines
No EOL
3.2 KiB
C#
/*
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* Greenshot - a free and open source screenshot tool
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* Copyright (C) 2007-2013 Thomas Braun, Jens Klingen, Robin Krom
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*
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* For more information see: http://getgreenshot.org/
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* The Greenshot project is hosted on Sourceforge: http://sourceforge.net/projects/greenshot/
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 1 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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using System;
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using System.Drawing;
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using System.IO;
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using System.Runtime.InteropServices;
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using System.Text;
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namespace GreenshotPlugin.UnmanagedHelpers
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{
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/// <summary>
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/// Description of Shell32.
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/// </summary>
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public static class Shell32
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{
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[DllImport("shell32")]
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public static extern int ExtractIconEx(string sFile, int iIndex, out IntPtr piLargeVersion, out IntPtr piSmallVersion, int amountIcons);
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[DllImport("shell32", CharSet = CharSet.Auto)]
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internal static extern IntPtr ExtractAssociatedIcon(HandleRef hInst, StringBuilder iconPath, ref int index);
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/// <summary>
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/// Returns an icon representation of an image contained in the specified file.
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/// This function is identical to System.Drawing.Icon.ExtractAssociatedIcon, xcept this version works.
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/// See: http://stackoverflow.com/questions/1842226/how-to-get-the-associated-icon-from-a-network-share-file
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/// </summary>
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/// <param name="filePath">The path to the file that contains an image.</param>
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/// <returns>The System.Drawing.Icon representation of the image contained in the specified file.</returns>
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public static Icon ExtractAssociatedIcon(String filePath)
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{
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int index = 0;
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Uri uri;
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if (filePath == null)
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{
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throw new ArgumentException(String.Format("'{0}' is not valid for '{1}'", "null", "filePath"), "filePath");
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}
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try
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{
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uri = new Uri(filePath);
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}
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catch (UriFormatException)
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{
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filePath = Path.GetFullPath(filePath);
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uri = new Uri(filePath);
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}
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if (uri.IsFile)
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{
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if (File.Exists(filePath))
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{
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StringBuilder iconPath = new StringBuilder(1024);
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iconPath.Append(filePath);
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IntPtr handle = ExtractAssociatedIcon(new HandleRef(null, IntPtr.Zero), iconPath, ref index);
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if (handle != IntPtr.Zero)
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{
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return Icon.FromHandle(handle);
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}
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}
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}
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return null;
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}
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}
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} |