public IActionResult RSVP(int userId, int campaignId, string source) { Particpant newParticpant = new Particpant() { UserId = userId, CampaignId = campaignId }; _context.Particpants.Add(newParticpant); _context.SaveChanges(); if (source == "camp") { return(RedirectToAction("SingleCampaign", new { campaignId = campaignId })); } else { return(RedirectToAction("Dashboard")); } }