在ASP.NET MVC项目中使用实体框架代码优先时登录失败错误

Question

I am working on an ASP.NET MVC project and trying to create database by using EF code-first using latest version of Entity Framework and it keeps get error of login user failed.

I checked every question about that problem but none of them fix that bug, like : Entity Framework Login Failed Error

EF6 Code First: Login Failing on update-database

EF Code First - creating database - Login failed for user

That is my connection string in web.config :

<connectionStrings>
    <add name="MyContext" 
        connectionString="Data Source=ROCKY-PC\ROCKYSQL;Initial Catalog=MyDB;Integrated Security=True" 
        providerName="System.Data.SqlClient"/>
</connectionStrings>

My context class

using System.Data.Entity;

namespace testNox.Models
{
    public class MyContext : DbContext
    {
        DbSet<Student> Students { get; set; }
    }
}

I have no idea where I went wrong, I tested connection several times and succeeded.

Note: everything is fine with database first but with code-first nothing get better in every time I try

Answer 1

It will happened because your sql server user don't have appropriate access rights for your database. In my case, I had create new login user and give him all rights which are required(add username and password in connectionstring). That's solve my all login and permission related issues.

SQL SERVER – Add Any User to SysAdmin Role – Add Users to System Roles

Answer 2

after a lot of testing ,the problem solved. i put a break point in context class and run it, i figured out that the execution didn't pass it so I added values to entities class in order to execute context class and it worked perfectly