如何在当前Web请求期间解决未经处理的异常 [英] How to resolve an unhanled exception during a current web request
问题描述
我创建了一个数据库作为Accountuser，而表格作为App目录文件夹上的LogOn。
在我的浏览器上，当我尝试注册一个电子邮件和密码时，我总是得到这个例外。我需要你的帮助来解决这个问题
模特支持自创建数据库以来，'GuestBookContext'上下文已更改。请考虑使用代码优先迁移来更新数据库（http://go.microsoft.com/fwlink/?LinkId=238269）。
描述：执行当前Web请求期间发生未处理的异常。请查看堆栈跟踪以获取有关错误及其在代码中的起源的更多信息。
异常详细信息：System.InvalidOperationException：支持'GuestBookContext'上下文的模型自数据库创建以来已更改。考虑使用Code First Migrations更新数据库（http://go.microsoft.com/fwlink/?LinkId=238269）。
源错误：
i created a database as Accountuser , while the table as LogOn on the App directory folder.
on my browser, when i try to register a email and password , i always get this exception. i need your help to resolve this
The model backing the 'GuestBookContext' context has changed since the database was created. Consider using Code First Migrations to update the database (http://go.microsoft.com/fwlink/?LinkId=238269).
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.InvalidOperationException: The model backing the 'GuestBookContext' context has changed since the database was created. Consider using Code First Migrations to update the database (http://go.microsoft.com/fwlink/?LinkId=238269).
Source Error:
Line 36: if (ModelState.IsValid)
Line 37: {
Line 38: var CreUserFind = _db.accountdetails.Find(details.NEmail);
Line 39: if (CreUserFind != null)
Line 40: {
源文件：c：\用户\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ b>我尝试了什么：
Source File: c:\Users\D doll\Documents\Visual Studio 2012\Projects\GuestBook\GuestBook\Controllers\AccountUserController.cs Line: 38
What I have tried:
using GuestBook.Models;
using System;
using System.Collections.Generic;
using System.Data.Entity.Validation;
using System.Linq;
using System.Web;
using System.Web.Mvc;
namespace GuestBook.Controllers
{
public class AccountUserController : Controller
{
//
// GET: /AccountUser/
GuestBookContext _db = new GuestBookContext();
protected override void Dispose(bool disposing)
{
_db.Dispose();
base.Dispose(disposing);
}
[HttpGet]
public ActionResult Registration()
{
return View();
}
[HttpPost]
public ActionResult Registration(LogOn details)
{
ViewBag.validResult = "Null";
if (ModelState.IsValid)
{
var CreUserFind = _db.accountdetails.Find(details.NEmail);
if (CreUserFind != null)
{
ViewBag.validResult = "Email Taken";
ModelState.AddModelError(" ", "The email is already taken");
}
else
{
var CreUser = _db.accountdetails.Create();
var simplecryp = new SimpleCrypto.PBKDF2();
var encrypto = simplecryp.Compute(details.NPassword);
CreUser.NEmail = details.NEmail;
CreUser.NPassword = encrypto;
CreUser.NPasswordSalt = simplecryp.Salt;
CreUser.UserId = Convert.ToString(Guid.NewGuid());
_db.accountdetails.Add(CreUser);
_db.SaveChanges();
ViewBag.validResult = "success";
ModelState.Clear();
ModelState.AddModelError("", "Regitration successfull");
}
}
return View();
模型类
for the model class
namespace GuestBook.Models
{
public class LogOn
{
public string UserId { get; set; }
[Key]
[Required(ErrorMessage = "*Enter password")]
[Display(Name = "Password")]
public string NPassword { get; set; }
[Required(ErrorMessage="*Enter email address")]
[Display(Name = "Email Address")]
public string NEmail { get; set; }
public string NPasswordSalt { get; set; }
}
}
模型db上下文的
for the model db context
namespace GuestBook.Models
{
public class GuestBookContext:DbContext
{
public GuestBookContext() : base("GuestBook") { }
public DbSet<guestbookentry> details { get; set; }
public DbSet<logon> accountdetails { get; set; }
}
}
推荐答案
您是否在寻找错误消息的解释？
它表示你的模型不再是底层数据库，你必须更新它（数据库）...
可能你在模型中添加了一些字段但没有反映那些数据库中的字段...
该错误还建议在VS内部使用工具进行更新...
Are you looking for an explanation to the error message?
It says that your model do not mach anymore the underlying database and you have to update it (the database)...
Probably you added some fields to the model but did not reflected those fields in the database...
The error also suggest a tool to use from inside VS to do the update...
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