获取文件图标

最新推荐文章于 2024-09-07 11:45:32 发布

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最新推荐文章于 2024-09-07 11:45:32 发布

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CC 4.0 BY-SA版权

文章标签： shell runtime

原文链接：http://www.cnblogs.com/dabaopku/archive/2010/02/26/1674483.html

本文介绍了一种使用C#代码从文件或文件夹路径获取图标的方法，包括获取大图标和小图标的功能。通过调用shell32.dll中的SHGetFileInfo函数，并定义了必要的结构体和枚举类型。

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参考来源:http://bg5sbk.cnblogs.com/archive/2005/12/18/GetFileInfo.html

获取文件和文件夹的图标

代码

using System;
using System.Runtime.InteropServices;
using System.Drawing;

namespace ThunderStarter
{
public class CGetFileIcon
{
/// <summary>
/// 通过路径获取图标
/// </summary>
/// <param name="path"> 文件或文件夹路径 </param>
/// <returns> 获取的图标 </returns>
public static Icon GetLargeIcon( string path)
{
return GetIcon(path, FileInfo.GetFileInfoFlags.SHGFI_LARGEICON);
}
public static Icon GetSmallIcon( string path)
{
return GetIcon(path, FileInfo.GetFileInfoFlags.SHGFI_SMALLICON);
}
private static Icon GetIcon( string path,FileInfo.GetFileInfoFlags type)
{
FileInfo.FileInfomation _info = new FileInfo.FileInfomation();
FileInfo.GetFileInfo(path, 0 , ref _info, Marshal.SizeOf(_info),
( int )(FileInfo.GetFileInfoFlags.SHGFI_ICON | type));

try
{
return Icon.FromHandle(_info.hIcon);
}
catch
{
return null ;
}
}
}

/// <summary>
/// 获取文件系统中对象的信息，例如：文件、文件夹、驱动器根目录
/// </summary>
public class FileInfo
{
[DllImport( " shell32.dll " , EntryPoint = " SHGetFileInfo " )]
public static extern int GetFileInfo( string pszPath, int dwFileAttributes, ref FileInfomation psfi, int cbFileInfo, int uFlags);

private FileInfo() { }

[StructLayout(LayoutKind.Sequential)]
public struct FileInfomation
{
public IntPtr hIcon;
public int iIcon;
public int dwAttributes;

[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260 )]
public string szDisplayName;

[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 80 )]
public string szTypeName;
}

public enum FileAttributeFlags : int
{
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
}

public enum GetFileInfoFlags : int
{
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
}
}
}

转载于:https://www.cnblogs.com/dabaopku/archive/2010/02/26/1674483.html