HI,
Windows提供文件扩展名的说明,例如.cpl文件的“控制面板项”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#但可以读取所有其他.NET语言.还有一种方法可以获得扩展的默认图标吗？任何帮助,将不胜感激.
提前致谢
您可以使用
SHGetFileInfo API获取该信息.这是一个包装方法：
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