.net core 2.1 tempdata跨视图传递无效

Question

                if (result > 0) {
                    TempData["UpdateSuccess"] = true;
                    return RedirectToAction(nameof(Index));
                }

TempData["UpdateSuccess"] 是Null

Answer 1

试试 stackoverflow 上的一个方法：

After Migrating to ASP Core 2.1 I had this issue and after working for a day find the solution:
in Startup.Configure() app.UseCookiePolicy(); should be after app.UseMVC();