你好,
Windows 提供文件扩展名的说明,例如 .cpl 文件的“控制面板项目”和 .daa 文件的“PowerISO 文件”。有什么办法可以在 .NET 中获取这些数据吗?我使用 C#,但可以阅读所有其他 .NET 语言。还有没有办法获得扩展的默认图标?任何帮助将不胜感激。
提前致谢
最佳答案
您可以使用 SHGetFileInfo
获取该信息的 API。这是一个包装器方法:
public static string GetFileTypeDescription(string fileNameOrExtension)
{
SHFILEINFO shfi;
if (IntPtr.Zero != SHGetFileInfo(
fileNameOrExtension,
FILE_ATTRIBUTE_NORMAL,
out shfi,
(uint)Marshal.SizeOf(typeof(SHFILEINFO)),
SHGFI_USEFILEATTRIBUTES | SHGFI_TYPENAME))
{
return shfi.szTypeName;
}
return null;
}
[DllImport("shell32")]
private static extern IntPtr SHGetFileInfo(string pszPath, uint dwFileAttributes, out SHFILEINFO psfi, uint cbFileInfo, uint flags);
[StructLayout(LayoutKind.Sequential)]
private 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;
}
private const uint FILE_ATTRIBUTE_READONLY = 0x00000001;
private const uint FILE_ATTRIBUTE_HIDDEN = 0x00000002;
private const uint FILE_ATTRIBUTE_SYSTEM = 0x00000004;
private const uint FILE_ATTRIBUTE_DIRECTORY = 0x00000010;
private const uint FILE_ATTRIBUTE_ARCHIVE = 0x00000020;
private const uint FILE_ATTRIBUTE_DEVICE = 0x00000040;
private const uint FILE_ATTRIBUTE_NORMAL = 0x00000080;
private const uint FILE_ATTRIBUTE_TEMPORARY = 0x00000100;
private const uint FILE_ATTRIBUTE_SPARSE_FILE = 0x00000200;
private const uint FILE_ATTRIBUTE_REPARSE_POINT = 0x00000400;
private const uint FILE_ATTRIBUTE_COMPRESSED = 0x00000800;
private const uint FILE_ATTRIBUTE_OFFLINE = 0x00001000;
private const uint FILE_ATTRIBUTE_NOT_CONTENT_INDEXED = 0x00002000;
private const uint FILE_ATTRIBUTE_ENCRYPTED = 0x00004000;
private const uint FILE_ATTRIBUTE_VIRTUAL = 0x00010000;
private const uint SHGFI_ICON = 0x000000100; // get icon
private const uint SHGFI_DISPLAYNAME = 0x000000200; // get display name
private const uint SHGFI_TYPENAME = 0x000000400; // get type name
private const uint SHGFI_ATTRIBUTES = 0x000000800; // get attributes
private const uint SHGFI_ICONLOCATION = 0x000001000; // get icon location
private const uint SHGFI_EXETYPE = 0x000002000; // return exe type
private const uint SHGFI_SYSICONINDEX = 0x000004000; // get system icon index
private const uint SHGFI_LINKOVERLAY = 0x000008000; // put a link overlay on icon
private const uint SHGFI_SELECTED = 0x000010000; // show icon in selected state
private const uint SHGFI_ATTR_SPECIFIED = 0x000020000; // get only specified attributes
private const uint SHGFI_LARGEICON = 0x000000000; // get large icon
private const uint SHGFI_SMALLICON = 0x000000001; // get small icon
private const uint SHGFI_OPENICON = 0x000000002; // get open icon
private const uint SHGFI_SHELLICONSIZE = 0x000000004; // get shell size icon
private const uint SHGFI_PIDL = 0x000000008; // pszPath is a pidl
private const uint SHGFI_USEFILEATTRIBUTES = 0x000000010; // use passed dwFileAttribute
(大多数常量实际上并没有在该代码中使用,但我还是把它们放在了一起,以防您想根据您的特定需求调整代码)
关于.net - 如何在 .NET 中获取文件扩展名的描述,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/3780028/