记录未插入数据库

Question

我正在尝试在数据库中插入数据。不幸的是，现在我无法开始使用存储库模式和统一框架的数据了。

这是我的代码：

控制器：

                 public ActionResult Create()
              {
                  return View();
             }
             [HttpPost]

              public ActionResult Create(FormCollection collection)
              {
                 try
                {
                     return RedirectToAction("Index");
                }
                catch
                {
                    return View();
                }
             }

存储库：

          public class UserMasterRepository : IUserMasterRepository
         {
           private List<UserMaster> users = new List<UserMaster>();
           string connectionstring = @"Data Source="";Initial 
           Catalog=DI;User ID=ma;Password=***********";

           public UserMaster Add(UserMaster item)
        {
        using (SqlConnection sqlCon = new SqlConnection(connectionstring))
        {
            sqlCon.Open();

            string query = "INSERT INTO Product (@ID,@Name,@City,@Address) 
           Values(ID,Name,City,Address)";


            for (int i = 0; i <= 100; i++)
            {
                SqlCommand sqlcmd = new SqlCommand(query, sqlCon);
                sqlcmd.Parameters.Add("@ID", SqlDbType.Int).Value = i;
                sqlcmd.Parameters.Add("@Name", SqlDbType.VarChar, 
                100).Value = "newride";
                sqlcmd.Parameters.Add("@City", SqlDbType.VarChar, 
                100).Value = "newride";
                sqlcmd.Parameters.Add("@Address", SqlDbType.VarChar, 
                100).Value = "USA";
                sqlcmd.ExecuteNonQuery();

            }
            return item;
        }

RouteConfig：

      public static void RegisterRoutes(RouteCollection routes)
         {
        routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

             routes.MapRoute(
            name: "Default",
            url: "{controller}/{action}/{id}",
            defaults: new { controller = "User", action = "Index", id = 
            UrlParameter.Optional }
            );
          }

以下代码我正在使用依赖注入统一框架 UnityConfig：

           public static class UnityConfig
          {
          public static Type IUserRepository { get; private set; }

          public static void RegisterComponents()
          {
        var container = new UnityContainer();

        container.RegisterType<IUserMasterRepository, 
        UserMasterRepository> 
       ();
        DependencyResolver.SetResolver(new 
         UnityDependencyResolver(container));
     }
 }

IUserMasterRepository：

          public interface IUserMasterRepository
           {
                IEnumerable<UserMaster> GetAll();
                UserMaster Get(int id);
                UserMaster Add(UserMaster item);
               bool Update(UserMaster item);
               bool Delete(int id);
           }

不抛出任何错误

如何解决此问题。