public static extern IntPtr SHGetFileInfo(
string pszPath,
int dwFileAttributes,
ref SHFILEINFO psfi,
int cbFileInfo,
int uFlags
);
public static Icon ExtractAssociatedFileIcon16(string fileName)
{
const int SHGFI_ICON = 0x100;
const int SHGFI_SMALLICON = 0x1;
const int SHGFI_USEFILEATTRIBUTES = 0x10;
const int FILE_ATTRIBUTE_NORMAL = 0x80;
var info = new SHFILEINFO();
Shell32.SHGetFileInfo(fileName, FILE_ATTRIBUTE_NORMAL, ref info, Marshal.SizeOf(info), SHGFI_ICON | SHGFI_SMALLICON);
try
{
return Icon.FromHandle(info.hIcon);
}
catch
{
Shell32.SHGetFileInfo(fileName, FILE_ATTRIBUTE_NORMAL, ref info, Marshal.SizeOf(info), SHGFI_ICON | SHGFI_SMALLICON | SHGFI_USEFILEATTRIBUTES);
try
{
return Icon.FromHandle(info.hIcon);
}
catch
{
return null;
}
}
}
public static string GetFileType(string fileName, bool dir, bool useExtensionOnly)
{
const int SHGFI_USEFILEATTRIBUTES = 0x10;
const int SHGFI_TYPENAME = 0x400;
const int FILE_ATTRIBUTE_NORMAL = 0x80;
const int FILE_ATTRIBUTE_DIR = 0x10;
var attr = dir ? FILE_ATTRIBUTE_DIR | FILE_ATTRIBUTE_NORMAL : FILE_ATTRIBUTE_NORMAL;
var req = useExtensionOnly ? SHGFI_USEFILEATTRIBUTES | SHGFI_TYPENAME : SHGFI_TYPENAME;
var info = new SHFILEINFO();
var ret = Shell32.SHGetFileInfo(fileName, attr, ref info, Marshal.SizeOf(info), req);
return info.szTypeName;
}
