how to update database

In the development environment, every time we make changes to the database, such as adding table fields. After we have changed the entity class, we only need to run the Update-database script in the NuGet package Management console:

In this article, we learned how to use the Entity Framework's Code First migrations (also known as the Code -first feature) tool to make some modifications to the model class using the migration feature, while simultaneously updating the table

ASP. net mvc-based ABC framework getting started tutorial, mvcabp Why do we use the abc@aliyun.comIn recent years, we have developed some Web applications and desktop applications with simple or complex requirements to achieve or elegance or

Original: Mvc5+ef6 Getting Started complete tutorial eightThis article is a relatively independent article, mainly on the non-loss of data for the database structure upgrade.As we explained the EF features earlier (see the third article), we've

This article is a relatively independent article, mainly on the non-loss of data for the database structure upgrade.As we explained the EF features earlier (see the third article), we've covered a way to update the database:EF compares model and

Update database structure phpappconsoledoctrine: schema: updateforce add Entitygetset selector phpappconsolegenerate: doctrine: entitiesxxxxxxxxx copy the file to the phpappconsole under the public web directory? Assets: installweb generates the

The document explains the series II and the document for getting started with the ABP (modern ASP. NET sample development framework ). ABP is short for "ASP. NET Boilerplate Project (ASP. NET sample Project. ASP. NET Boilerplate is a new starting

Learning ASP. net mvc (8) -- "Code First Migrations" tool, mvcmigrations In this article, we will learn how to use the "Code First Migrations" (also known as the Code First feature) tool of the Entity Framework and use the "Migration" feature to

CodeFirst is used in the original database. It must be executed once after the entity is added for the first time. Enable-Migrations Add-migration Initial-IgnoreChanges Update-database The others are the same as those of the new database.

Use CodeFirst to create a database and codefirst to create a database CodeFirst refers to the creation of the corresponding data structure based on the EF entity class. The creation process is completed by the DotNet framework itself, and the

In this section, you will use Entity Framework Code First to perform model class operations. So that these operations and changes can be applied to the database. By default, as you did in the previous tutorial, Entity Framework Code First is used to

Implementation inheritance of MVC5 Entity Framework Learning You have learned how to handle concurrency exceptions. In this section, you will learn how to implement inheritance. In object-oriented programming, you can use inheritance to reuse code.

Original: Mvc5+ef6 Getting Started complete tutorial eightThis article is a relatively independent article, mainly on the non-loss of data for the database structure upgrade.As we explained the EF features earlier (see the third article), we've

Recent study Mvc5+ef6, found Microsoft's original text, a very good series, Getting Started with Entity Framework 6 Code first using MVC 5, URL:/http Www.asp.net/mvc/overview/getting-started/getting-started-with-ef-using-mvc/

When you migrate to code first, the new database is created by default in the App_Data folder after Update-database, and the following error occurs if you delete the use update-database command:Cannot attach the file '

Why use ABPIn recent years we have developed a number of Web applications and desktop applications that require or are simple or complex, implemented or elegant or ugly. A basic fact is: we just accumulate some experience or improve the familiarity

ABP is a starting point for using best practices and using the most popular tools for new modern web applications. An underlying framework or project template that can be used as a general-purpose application. Next through this article to give you a

The Entity Framework v6.1 begins native support for applying code first to an existing database. The following is a demo of how to apply code first to an existing database and how to use code first migration to update the database.1. Apply code

This article discusses content based on the EF4.1 version. The existing databases discussed in this article are not created by EF. This article assumes that you have a certain understanding of code first migration, and if you do not understand the

First Open: Tools =>nuget Package Manager = + Package Manager consoleThen enter enable-migrations carriage returnThen enter add-migration name carriage return (here name you can name yourself)Finally enter Update-database carriage return,You can