Datacontext submitchanges not updating

This article introduces basic Create, Read, Update and Delete (CRUD) operations using LINQ to SQL in MVC.

We are developing an application for User Entity on which we can perform Create, Read, Update and Delete operations.

Create Table We create a table in a database for the user to store user information.

The user table creation code is as in the following: "Project...". NET MVC 4 Web Application" from the list, then provide the application name " User Registration" and set the path in the location input where you want to create the application.

Step 3: Now choose the Project Template "Empty" and select "Razor" as the view engine from the dropdown list.

Adding a LINQ to SQL Class Entity classes are created and stored in LINQ to SQL Classes files (files). It is a Data Context class that contains methods and properties for connecting to a database and manipulating the data in the database.

A repository class contains the specialized data access methods required for its corresponding domain model entity.

When you create the repository class, you create an interface that represents all of the methods used by the repository class.

Within your controllers, you write your code against the interface instead of the repository.

That way, you can implement the repository using various data access technologies in the future.

So first of all you need to create an interface "IUser Repository" under the Models folder that contains basic CRUD operations access methods for user.

Create Controller and Views for User CRUD operations You need to create a controller to handle the request from the browser.

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The database is not updated, because you're submitting changes on the db DataContext, and the 'hold' you've provided through the constructor is not 
06-Feb-2019 12:52
The following table lists the possible states for LINQ to SQL objects. - An object not queried through the current DataContext such as a newly created object. - An. 
06-Feb-2019 12:57
It looks good, but not enough. We can’t attach a changed entity unless the entity has a TimeStamp column in the corresponding table. Therefore, we should. 
06-Feb-2019 13:02

Datacontext submitchanges not updating introduction

Datacontext submitchanges not updating

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