如何在 ASP.NET MVC 中使用 EntityFramework6.Npgsql 从 Postgres 数据库获取数据？

Question

我正在使用Npgsql和EntityFramework6.Npgsql在ASP.NET MVC中创建一个登录应用程序，我想实现一个通过标识号找回密码的功能，即用户点击“我忘记了密码”按钮，然后他必须输入识别号，程序检查它是否存在或正确，然后显示更改密码的用户信息。

用户的模型类：

public partial class user
{

    public int id { get; set; }
    [Display(Name = "Id number")]
    [Required(AllowEmptyStrings = false, ErrorMessage = "It's necessary the id number")]
    public string idnumber { get; set; }

    [Display(Name = "Name")]
    [Required(AllowEmptyStrings = false, ErrorMessage = "It's necessary the name")]
    public string fname { get; set; }

    [Display(Name = "Last name")]
    [Required(AllowEmptyStrings = false, ErrorMessage = "It's necessary the last name)]
    public string lname { get; set; }

    [Display(Name = "Password")]
    [Required(AllowEmptyStrings = false, ErrorMessage = "It's necessary a pass")]
    [DataType(DataType.Password)]
    [MinLength(6, ErrorMessage = "Min six letters")]
    public string pass { get; set; }

    [Display(Name = "Confirm pass")]
    [DataType(DataType.Password)]
    [Compare("pass", ErrorMessage = "The pass don't match")]
    public string check_pass { get; set; }

    [Display(Name = "Email")]
    [Required(AllowEmptyStrings = false, ErrorMessage = "It's necessary an email")]
    [DataType(DataType.EmailAddress)]
    public string email { get; set; }
}

所以，在[HttpGet]中标识号是由程序获取的，而在[HttpPost]中信息是由标识号改变的，或者它应该这样做。

[HttpGet]
    public ActionResult recoverPass()
    {
        return View();
    }

    [HttpPost]
    public ActionResult recoverPass(userPassRecover user)
    {    
        using(inventarioEntitiesDBA dc = new inventarioEntitiesDBA())
        {
            var u = dc.user.Where(a => a.cedula == user.cedula).FirstOrDefault();

            dc.user.Remove(u);
            dc.user.Add(user);
            dc.SaveChanges();

            return View();
        }
    }

我真的不知道如何使这项工作，任何建议表示赞赏

Answer 1

如果有人遇到同样的问题：

    [HttpGet]
    public ActionResult recoverPass()
    {

        return View();
    }

    [HttpPost]
    public ActionResult recoverPass(userRecoverPass user)
    {
        using (inventarioEntitiesDBA dc = new inventarioEntitiesDBA())
        {
            var u = dc.user.Where(a => a.idnumber == user.idnumber)?.FirstOrDefault();

            if (u != null)
            {
                u.pass = user.newpass;
                dc.SaveChanges();
            }

            return RedirectToAction("login");
        }
    }

其中 ʻuserRecoverPass` 对象是仅请求信息来执行密码更改的模型。