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EntityFramework updating model from database results in mapping file not created

I am having some trouble adding a table to my data entity model.
EntityFramework 6.1.3 installed
VS Enterprise 2017 15.9.3
Repro steps:
I open my Model.edmx
Right click > Update Model From Database
Add Table > select my table > Finish
And when I go into Model.Context.cs I see this line for my newly added table:
modelBuilder.Configurations.Add(new MyTable_Mapping());
but the MyTable_Mapping is underlined and complains the file is missing.
And inside Model.Mapping.cs reads
ErrorGeneratingOutput
My table schema:
CREATE TABLE [dbo].[MyTable](
[Id] [bigint] IDENTITY(1,1) NOT NULL,
[AccountUserId] [int] NOT NULL,
[MFAUserId] [bigint] NOT NULL,
[LastAuthDate] [datetime] NOT NULL,
[CreateDate] [datetime] NOT NULL,
[StatusId] [int] NOT NULL,
CONSTRAINT [PK_MyTable] PRIMARY KEY CLUSTERED
(
[Id] ASC
)WITH (STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]

Migrate Users ASP.NET Web Pages tables to MVC 6

Info
I want to 'upgrade' my ASP.NET Web Page project to an ASP.NET MVC project by just starting over, it are only a few pages and it would be good for learning.
The Issue
The current project holds a few users for authentication
ASP.NET made a few tables in my database:
Roles
Profiles
Users
...
But when I use the MVC Project I see it makes different tables for authentication:
AspNetUserLogins
AspNetUserRoles
AspNetUser
...
The Question
How do I migrate my users or how do I tell ASP.net to use the old tables?

Greetings you may want to start with Database first Approach in MVC-Core but its little bit different from what you have seen so far, let me explain the steps for adding your database:
Install Entity Framework:
Run Install-Package Microsoft.EntityFrameworkCore.SqlServer
To enable reverse engineering from an existing database we need to install a couple of other packages too.
Run Install-Package Microsoft.EntityFrameworkCore.Tools –Pre
Run Install-Package Microsoft.EntityFrameworkCore.Design
Run Install-Package Microsoft.EntityFrameworkCore.SqlServer.Design
Now Reverse engineer your model:
Run the following command to create a model from the existing
database. If you receive an error stating the term
'Scaffold-DbContext' is not recognized as the name of a cmdlet, then
close and reopen Visual Studio.
Scaffold-DbContext "Server=(localdb)\mssqllocaldb;Database=DataBaseName;Trusted_Connection=True;" Microsoft.EntityFrameworkCore.SqlServer -OutputDir Models
The reverse engineer process created entity classes and a derived context based on the schema of the existing database. The entity classes are simple C# objects that represent the data you will be querying and saving. And now you can create a DbContext class and start using your database, so far you issue about database is over, and now i suggest you read about Identity In Asp.NET Core.

I came across this site thanks to this blog
And edited to fit my needs:
/****** Object: Table [dbo].[AspNetRoles] Script Date: 11/14/2013 1:56:03 PM ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
IF OBJECT_ID('dbo.AspNetUserRoles', 'U') IS NOT NULL
DROP TABLE [dbo].[AspNetUserRoles]
GO
IF OBJECT_ID('dbo.AspNetUserLogins', 'U') IS NOT NULL
DROP TABLE [dbo].[AspNetUserLogins]
GO
IF OBJECT_ID('dbo.AspNetUserClaims', 'U') IS NOT NULL
DROP TABLE [dbo].[AspNetUserClaims]
GO
IF OBJECT_ID('dbo.AspNetRoles', 'U') IS NOT NULL
DROP TABLE [dbo].[AspNetRoles]
GO
IF OBJECT_ID('dbo.AspNetUsers', 'U') IS NOT NULL
DROP TABLE [dbo].[AspNetUsers]
GO
CREATE TABLE [dbo].[AspNetUsers] (
[AccessFailedCount] INT NOT NULL,
[Email] NVARCHAR (MAX) NULL,
[EmailConfirmed] BIT DEFAULT ((0)) NULL,
[Id] NVARCHAR (128) NOT NULL,
[LockoutEnabled] BIT DEFAULT ((0)) NULL,
[LockoutEndDateUtc] DATETIME2 (7) NULL,
[PasswordHash] NVARCHAR (MAX) NULL,
[PhoneNumber] NVARCHAR (MAX) NULL,
[PhoneNumberConfirmed] BIT DEFAULT ((0)) NULL,
[SecurityStamp] NVARCHAR (MAX) NULL,
[TwoFactorEnabled] BIT DEFAULT ((0)) NULL,
[UserName] NVARCHAR (MAX) NULL,
[CreateDate] DATETIME NULL,
[ConfirmationToken] NVARCHAR (128) NULL,
[IsConfirmed] BIT DEFAULT ((0)) NULL,
[LastPasswordFailureDate] DATETIME NULL,
[PasswordFailuresSinceLastSuccess] INT DEFAULT ((0)) NULL,
[PasswordChangedDate] DATETIME NULL,
[PasswordVerificationToken] NVARCHAR (128) NULL,
[PasswordVerificationTokenExpirationDate] DATETIME NULL,
CONSTRAINT [PK_dbo.AspNetUsers] PRIMARY KEY CLUSTERED ([Id] ASC)
);
GO
CREATE TABLE [dbo].[AspNetRoles] (
[Id] NVARCHAR (128) NOT NULL,
[Name] NVARCHAR (MAX) NOT NULL,
CONSTRAINT [PK_dbo.AspNetRoles] PRIMARY KEY CLUSTERED ([Id] ASC)
);
GO
CREATE TABLE [dbo].[AspNetUserRoles] (
[UserId] NVARCHAR (128) NOT NULL,
[RoleId] NVARCHAR (128) NOT NULL,
CONSTRAINT [PK_dbo.AspNetUserRoles] PRIMARY KEY CLUSTERED ([UserId] ASC, [RoleId] ASC),
CONSTRAINT [FK_dbo.AspNetUserRoles_dbo.AspNetRoles_RoleId] FOREIGN KEY ([RoleId]) REFERENCES [dbo].[AspNetRoles] ([Id]) ON DELETE CASCADE,
CONSTRAINT [FK_dbo.AspNetUserRoles_dbo.AspNetUsers_UserId] FOREIGN KEY ([UserId]) REFERENCES [dbo].[AspNetUsers] ([Id]) ON DELETE CASCADE
);
GO
CREATE NONCLUSTERED INDEX [IX_RoleId]
ON [dbo].[AspNetUserRoles]([RoleId] ASC);
GO
CREATE NONCLUSTERED INDEX [IX_UserId]
ON [dbo].[AspNetUserRoles]([UserId] ASC);
GO
CREATE TABLE [dbo].[AspNetUserLogins] (
[UserId] NVARCHAR (128) NOT NULL,
[LoginProvider] NVARCHAR (128) NOT NULL,
[ProviderKey] NVARCHAR (128) NOT NULL,
CONSTRAINT [PK_dbo.AspNetUserLogins] PRIMARY KEY CLUSTERED ([UserId] ASC, [LoginProvider] ASC, [ProviderKey] ASC),
CONSTRAINT [FK_dbo.AspNetUserLogins_dbo.AspNetUsers_UserId] FOREIGN KEY ([UserId]) REFERENCES [dbo].[AspNetUsers] ([Id]) ON DELETE CASCADE
);
GO
CREATE NONCLUSTERED INDEX [IX_UserId]
ON [dbo].[AspNetUserLogins]([UserId] ASC);
GO
CREATE TABLE [dbo].[AspNetUserClaims] (
[Id] INT IDENTITY (1, 1) NOT NULL,
[ClaimType] NVARCHAR (MAX) NULL,
[ClaimValue] NVARCHAR (MAX) NULL,
[UserId] NVARCHAR (128) NOT NULL,
CONSTRAINT [PK_dbo.AspNetUserClaims] PRIMARY KEY CLUSTERED ([Id] ASC),
CONSTRAINT [FK_dbo.AspNetUserClaims_dbo.AspNetUsers_User_Id] FOREIGN KEY ([UserId]) REFERENCES [dbo].[AspNetUsers] ([Id]) ON DELETE CASCADE
);
GO
CREATE NONCLUSTERED INDEX [IX_User_Id]
ON [dbo].[AspNetUserClaims]([UserId] ASC);
GO
INSERT INTO AspNetUsers(Id, UserName, PasswordHash, SecurityStamp,
CreateDate, ConfirmationToken, IsConfirmed, LastPasswordFailureDate, PasswordFailuresSinceLastSuccess,
PasswordChangedDate, PasswordVerificationToken, PasswordVerificationTokenExpirationDate,AccessFailedCount,LockoutEndDateUtc)
SELECT Users.UserId, Users.UserName, Memberships.Password,
Memberships.PasswordSalt, CreateDate,
null, 1, '1/1/1977', 0,
'1/1/2017', null, '1/1/2100',0,'1/1/1977'
FROM Users
LEFT OUTER JOIN Memberships ON Users.UserId = Memberships.UserId
GO
INSERT INTO AspNetRoles(Id, Name)
SELECT RoleId, RoleName
FROM Roles
GO
INSERT INTO AspNetUserRoles(UserId, RoleId)
SELECT UserId, RoleId
FROM UsersInRoles
GO
--INSERT INTO AspNetUserLogins(UserId, LoginProvider, ProviderKey)
--SELECT UserId, Provider, ProviderUserId
--FROM Memberships
--GO

combine 2 tables in same database into 1 gridview

Currently i have 2 tables, which is user_table and application_table.
The main table is application_table, but i need some information to display which only can find in user_table.
CREATE TABLE [dbo].[Application_Table] (
[Id] INT IDENTITY (0, 1) NOT NULL,
[Name] VARCHAR (50) NULL,
[Date] DATE NULL,
[Vehicle] VARCHAR (50) NULL,
[DestinationFrom] VARCHAR (50) NULL,
[DestinationTo] VARCHAR (50) NULL,
PRIMARY KEY CLUSTERED ([Id] ASC)
);
here is the second table:
CREATE TABLE [dbo].[User_table] (
[Name] VARCHAR (50) NOT NULL,
[Email] VARCHAR (50) NULL,
[Password] VARCHAR (50) NULL,
[Department] VARCHAR (50) NULL,
CONSTRAINT [PK_User_table] PRIMARY KEY CLUSTERED ([Name] ASC)
);
I need to display all information from application_table and some information such as email, department from user_table based on Name in application_table in gridview.
Is that any simple way to do it? I am quite new in asp net and c#, please guide me as i am a slow learner.

You could achieve that using a multi level grid.
Refer to this for details
ASP Multi Level Grid
BTW you should add a foreign key to your second table.

Using table mapping in Entity Framework 6

I'm having lots of difficulty trying to use Entity Framework 6 for a simple application. I used the "EF Designer From Database" option, and something's wrong with my data model or my object model but I can't figure it out. I can't post images yet, but here is the SQL for my data model:
CREATE TABLE [dbo].[Customer](
[ID] [int] IDENTITY(1,1) NOT NULL,
[Company] [varchar](100) NULL,
[Email] [varchar](50) NULL,
[FirstName] [varchar](50) NULL,
[LastName] [varchar](50) NULL,
[Phone] [varchar](20) NULL,
CONSTRAINT [PK_Customer] PRIMARY KEY CLUSTERED ([ID] ASC)
)
GO
CREATE TABLE [dbo].[Feature](
[ID] [int] NOT NULL,
[Name] [varchar](100) NULL,
[Type] [char](1) NULL,
CONSTRAINT [PK_Feature] PRIMARY KEY CLUSTERED ([ID] ASC)
)
GO
CREATE TABLE [dbo].[License](
[ID] [int] IDENTITY(1,1) NOT NULL,
[Comment] [varchar](max) NULL,
[CustomerID] [int] NULL,
[ExpirationDate] [datetime] NULL,
[SerialNumber] [char](26) NULL,
CONSTRAINT [PK_License] PRIMARY KEY CLUSTERED ([ID] ASC)
)
GO
CREATE TABLE [dbo].[LicenseItem](
[LicenseID] [int] NOT NULL,
[ItemID] [int] NOT NULL,
[Seats] [int] NULL,
CONSTRAINT [PK_LicenseItem] PRIMARY KEY CLUSTERED ([LicenseID] ASC, [ItemID] ASC)
)
GO
CREATE TABLE [dbo].[PackageModule](
[PackageID] [int] NOT NULL,
[ModuleID] [int] NOT NULL,
CONSTRAINT [PK_PackageModule] PRIMARY KEY CLUSTERED ([PackageID] ASC, [ModuleID] ASC)
)
GO
ALTER TABLE [dbo].[License] WITH CHECK ADD CONSTRAINT [FK_License_Customer] FOREIGN KEY([CustomerID])
REFERENCES [dbo].[Customer] ([ID])
GO
ALTER TABLE [dbo].[License] CHECK CONSTRAINT [FK_License_Customer]
GO
ALTER TABLE [dbo].[LicenseItem] WITH CHECK ADD CONSTRAINT [FK_LicenseItem_Feature] FOREIGN KEY([ItemID])
REFERENCES [dbo].[Feature] ([ID])
GO
ALTER TABLE [dbo].[LicenseItem] CHECK CONSTRAINT [FK_LicenseItem_Feature]
GO
ALTER TABLE [dbo].[LicenseItem] WITH CHECK ADD CONSTRAINT [FK_LicenseItem_License] FOREIGN KEY([LicenseID])
REFERENCES [dbo].[License] ([ID])
GO
ALTER TABLE [dbo].[LicenseItem] CHECK CONSTRAINT [FK_LicenseItem_License]
GO
ALTER TABLE [dbo].[PackageModule] WITH CHECK ADD CONSTRAINT [FK_PackageModule_ModuleID_Feature] FOREIGN KEY([ModuleID])
REFERENCES [dbo].[Feature] ([ID])
GO
ALTER TABLE [dbo].[PackageModule] CHECK CONSTRAINT [FK_PackageModule_ModuleID_Feature]
GO
ALTER TABLE [dbo].[PackageModule] WITH CHECK ADD CONSTRAINT [FK_PackageModule_PackageID_Feature] FOREIGN KEY([PackageID])
REFERENCES [dbo].[Feature] ([ID])
GO
ALTER TABLE [dbo].[PackageModule] CHECK CONSTRAINT [FK_PackageModule_PackageID_Feature]
GO
For my object model, I made Feature an abstract class and created Package and Module entities that inherit from Feature (feature is mapped to both Package and Module using Type as a discriminator). Package and Module are associated together with a many-to-many relationship, which is mapped to the PackageModule table, and I associated those to License so that License has Packages and Modules collections (with FK constraints). Here's where I'm stuck:
I added a Seats property to both Package and Module, deleted the auto-generated LicenseItem entity, and mapped LicenseItem to the Package and Module entities to map the Seats property to. This fails because the LicenseID PK is not mapped, and I just can't figure out how to get around this. I'm obviously missing something fundamental, so...be gentle. :)

How do I change a column type on Windows Azure on Visual Studio?

I'm trying to update a table on Windows Azure but I don't know how.
This is my table. I need to update detallePeriodo from nvarchar(2) to nvarchar(4).
CREATE TABLE [dbo].[CLIENTE_LIDER]
(
[Cedula] NVARCHAR (12) NOT NULL,
[Nombre] NVARCHAR (100) NULL,
[TelCelular] NVARCHAR (9) NULL,
[TelCasa] NVARCHAR (9) NULL,
[Direccion] NVARCHAR (200) NULL,
[Distrito] INT NULL,
[Periosidad] INT NULL,
[DetallePeriodo] NVARCHAR (2) NULL,
[Monto_Total] FLOAT (53) DEFAULT ((0)) NULL,
[Monto_Actual] FLOAT (53) DEFAULT ((0)) NULL,
[Cuota] FLOAT (53) DEFAULT ((0)) NULL,
[Codigo] VARCHAR (12) NULL,
[Ruta] INT NULL,
[FechaIngresoSistema] DATE NULL,
PRIMARY KEY CLUSTERED ([Cedula] ASC),
FOREIGN KEY ([Distrito]) REFERENCES [dbo].[DISTRITOS] ([codigo]),
CONSTRAINT [FK_CLIENTE_LIDER_0] FOREIGN KEY ([Ruta]) REFERENCES [dbo].[RUTA] ([Codigo])
);

From the documentation, which applies to both SQL Server and the Azure SQL Database, it appears you just need a fairly standard ALTER statement.
ALTER TABLE dbo.CLIENTE_LIDER ALTER COLUMN DetallePeriodo NVARCHAR(4);