连接字符串设置上的ASP.NET Core EF Core重定向响应

如何解决连接字符串设置上的ASP.NET Core EF Core重定向响应

我有一些类似下面的代码，其中基于经过身份验证的用户，我需要获取其他连接字符串。

但是，有时无法通过身份验证的用户，或者找不到连接字符串。我想捕获该异常（如下），只需清除所有其他重定向，然后将用户强制转到未经授权的页面即可。

不确定下面的设置是否正确，似乎不起作用。什么需要改变？

services.AddDbContext<DbContext>((serviceProvider,options) =>
                {
                    var httpContext = serviceProvider.GetService<IHttpContextAccessor>().HttpContext;
                    if (httpContext != null)
                    {
                        System.Data.sqlClient.sqlConnection connection = null;

                        try
                        {
                            var userIdentity = httpContext.Request.HttpContext.User.Identity;

                            /* do some work here based on the user to get the appoprirate connection string and set it. */

                            options.UsesqlServer(connection);
                        }
                        catch (Exception ex)
                        {
                            // Exception caught as it wasn't able to find a authenticated user or the connection string wasn't found.
                            // want to redirect to an unauthorized page,NOT WORKING
                            httpContext.Response.Clear();
                            httpContext.Response.Redirect("/Unauthorized/",true);
                            return;
                        }
                        finally
                        {
                            connection?.Close();
                        }
                    }
                });