public void Dispose()
{
if (_enumHandler != null && Marshal.IsComObject(_enumHandler))
{
Marshal.ReleaseComObject(_enumHandler);
}
_enumHandler = null;
}
public static IAssocHandler[] EnumFileHandlers(string fileExtension, bool flush = false)
{
var assoc = flush ? null : FindInCache(fileExtension);
if (assoc is object)
{
return(assoc);
}
if (lAssoc.Count > 0)
{
lAssoc.Clear();
}
IAssocHandler h = null;
IEnumAssocHandlers handlers = null;
uint cret;
try
{
NativeShell.SHAssocEnumHandlers(fileExtension, ASSOC_FILTER.RECOMMENDED, out handlers);
}
catch
{
return(null);
}
do
{
handlers.Next(1U, out h, out cret);
if (h is object)
{
lAssoc.Add(h);
}
}while (cret > 0L);
assoc = lAssoc.ToArray();
AddToCache(fileExtension, assoc);
return(assoc);
}
public static extern long SHAssocEnumHandlers([In, MarshalAs(UnmanagedType.LPWStr)] string pszExtra, [In] ASSOC_FILTER afFilter, [Out, MarshalAs(UnmanagedType.Interface)] out IEnumAssocHandlers ppEnumHandler);
public static extern HResult SHAssocEnumHandlers([MarshalAs(UnmanagedType.LPWStr)][In] string pszExtra, [In] ASSOC_FILTER afFilter, out IEnumAssocHandlers ppEnumHandler);
internal static extern Int32 SHAssocEnumHandlersForProtocolByApplication(
[In, MarshalAs(UnmanagedType.LPWStr)] string protocol,
ref Guid riid,
[Out, MarshalAs(UnmanagedType.Interface)] out IEnumAssocHandlers ppEnumHandler);