我正在使用实体框架数据库。但是当我运行我的应用程序时，我得到了一个名为＆＃34的异常;类型为＃System; InvalidOperationException＆＃39;发生在EntityFramework.dll中但未在用户代码中处理。实体类型User不是当前上下文的模型的一部分＆＃34;。
我在context.Users.Add(df);中的LoginController部分得到了错误。
我的实体数据库代码如下所示： 型号：User.cs
//------------------------------------------------------------------------------
// <auto-generated>
// This code was generated from a template.
//
// Manual changes to this file may cause unexpected behavior in your application.
// Manual changes to this file will be overwritten if the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------
namespace MVCRegistrationAndLogin.Models
{
using System;
using System.Collections.Generic;
public partial class User
{
public int Id { get; set; }
public string LastName { get; set; }
public string FirstName { get; set; }
public string UserName { get; set; }
public string Password { get; set; }
public string Email { get; set; }
public string abc { get; set; }
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using MVCRegistrationAndLogin.Models;
using System.Security.Cryptography;
using System.Web.Security;
namespace MVCRegistrationAndLogin.Controllers
{
public class LoginController : Controller
{
// GET: Login
public ActionResult Index()
{
using (var db = new MyDbModelEntities())
{
return View(db.Users.ToList());
}
}
public ActionResult UserLogin()
{
return View();
}
[HttpPost]
public ActionResult UserLogin(string username, string password)
{
using (MyDbModelEntities context = new MyDbModelEntities())
{
var user = from u in context.Users
where u.UserName == username
select u;
if (user.ToList().Count == 1)
{
if (user.First().Password == CreatePasswordHash(password, user.First().abc))
{
Session["logged"] = user.First().UserName;
return RedirectToAction("ShowProducts", "Products");
}
}
}
ModelState.AddModelError("_loginError", "Error in username and password");
if (!ModelState.IsValid)
return View();
return RedirectToAction("UserLogin", "Login");
}
private static string CreateSalt()
{
RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider();
byte[] byteArr = new byte[64];
rng.GetBytes(byteArr);
return Convert.ToBase64String(byteArr);
}
private static string CreatePasswordHash(string password, string aa)
{
string passwrodSalt = String.Concat(password, aa);
string hashedPwd = FormsAuthentication.HashPasswordForStoringInConfigFile(passwrodSalt, "sha1");
return hashedPwd;
}
public ActionResult Register()
{
return View();
}
[HttpPost]
public ActionResult Register(User df)
{
try
{
using (var context = new MyDbModelEntities())
{
df.abc = CreateSalt();
df.Password = CreatePasswordHash(df.Password, df.abc);
**context.Users.Add(df);**
context.SaveChanges();
return RedirectToAction("Index", "Home");
}
}
catch (System.Data.Entity.Validation.DbEntityValidationException e)
{
var outputLines = new List<string>();
foreach (var eve in e.EntityValidationErrors)
{
outputLines.Add(string.Format(
"{0}: Entity of type \"{1}\" in state \"{2}\" has the following validation errors:",
DateTime.Now, eve.Entry.Entity.GetType().Name, eve.Entry.State));
foreach (var ve in eve.ValidationErrors)
{
outputLines.Add(string.Format(
"- Property: \"{0}\", Error: \"{1}\"",
ve.PropertyName, ve.ErrorMessage));
}
}
//Write to file
System.IO.File.AppendAllLines(@"c:\temp\tulsi_errors.txt", outputLines);
// Showing it on screen
throw new Exception(string.Join(",", outputLines.ToArray()));
}
}
}
}
视图：
Register.cshtml
@model MVCRegistrationAndLogin.Models.User
@{
ViewBag.Title = "Register";
}
<h2>Register</h2>
@using (Html.BeginForm())
{
@Html.ValidationSummary(true)
@Html.AntiForgeryToken()
<div class="editor-label">
@Html.LabelFor(model => model.LastName)
</div>
<div class="editor-field">
@Html.TextBoxFor(model => model.LastName)
@Html.ValidationMessageFor(model => model.LastName)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.FirstName)
</div>
<div class="editor-field">
@Html.TextBoxFor(model => model.FirstName)
@Html.ValidationMessageFor(model => model.FirstName)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.UserName)
</div>
<div class="editor-field">
@Html.TextBoxFor(model => model.UserName)
@Html.ValidationMessageFor(model => model.UserName)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.Password)
</div>
<div class="editor-field">
@Html.PasswordFor(model => model.Password)
@Html.ValidationMessageFor(model => model.Password)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.Email)
</div>
<div class="editor-field">
@Html.TextBoxFor(model => model.Email)
@Html.ValidationMessageFor(model => model.Email)
</div>
<div>
<p>
<input type="submit" value="Create" />
</p>
</div>
<div>
@Html.ActionLink("Back to List", "Index")
</div>
}
UserLogin.cshtml
@model MVCRegistrationAndLogin.Models.User
@{
ViewBag.Title = "UserLogin";
}
<h2>UserLogin</h2>
@using (Html.BeginForm())
{
@Html.ValidationSummary(true, "Login failed due to wrong credentials!!!")
@Html.AntiForgeryToken()
<div class="editor-label">
@Html.LabelFor(model => model.UserName)
</div>
<div class="editor-field">
@Html.TextBoxFor(model => model.UserName)
@Html.ValidationMessageFor(model => model.UserName)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.Password)
</div>
<div class="editor-field">
@Html.PasswordFor(model => model.Password)
@Html.ValidationMessageFor(model => model.Password)
</div>
<div>
<p>
<input type="submit" value="Login" />
</p>
</div>
<div>
@Html.ActionLink("New Registration", "Register")
</div>
}
我该如何解决这个问题？