public static async Task <IHtmlContent> InvokeComponentAsync <TModel, TResult>(this RazorPage <IEnumerable <TModel> > source, IViewComponentHelper comphelper, string componentname, Expression <Func <TModel, TResult> > expression, object param, object param1 = null) { // source.Component. return(await comphelper.InvokeAsyncEx(componentname, expression, param, param1)); }