实体框架5 - 如何从现有数据库生成POCO类 [英] Entity Framework 5 - How to generate POCO classes from existing database
问题描述
我正在使用VS 2012和EF 5.我有一个现有的数据库,我想从现有的数据库创建POCO类。我按照步骤将ADO.NET实体数据模型添加到我的项目中。我通过向导来使用现有的数据库。然后在设计器打开时创建edmx和tt文件。但是,我想创建POCO对象并使用它们。 Microsoft站点声明POCO实体框架生成器已过时,我应该使用DBContext生成器。我无法找出我用来生成POCO类的步骤。我只看到edmx设计师。我真的不想要一个edmx文件,而只是POCO类。如何使用EF 5和VS 2012从现有数据库中获取POCO类?
您可以从在线模板添加:
- 从现有数据库生成edmx
- 选择
添加新项目
- 搜索POCO的在线模板
- 添加EF 5.x DbContext流利生成器
它将在您的项目中添加三个T4模板:
- XXX.Context.tt - 从DbContext继承的上下文
- XXX.Entities.tt - POCO
- XXX.Mappings.tt - 每个实体的流畅映射您必须手动设置您的edmx数据模型的路径,否则。每个模板都有行
string inputFile = @$ edmxInputFile $;
。您需要在此处提供您的edmx文件的名称:
string inputFile = @Northwind.edmx;
/ p>I am using VS 2012 and EF 5. I have an existing database that I want to create POCO classes from the existing database. I followed the steps to add an ADO.NET Entity Data Model to my project. I went through the wizard to use an existing database. It then created the edmx and tt files with the designer open. However, I want to create the POCO objects and use them. The Microsoft site states that the POCO Entity Framework Generator is obsolete and I should use the DBContext Generator. I can't figure out steps I use to generate the POCO classes. I only see the edmx designer. I really don't even want an edmx file but instead just POCO classes. How can I get POCO classes to be created from an existing database using EF 5 and VS 2012?
解决方案Use EF 5.x DbContext Fluent Generator
You can add it from online templates:
- Generate edmx from existing database
- Select
Add New Item
- Search online templates for POCO
- Add EF 5.x DbContext Fluent Generator
It will add three T4 templates to your project:
- XXX.Context.tt - context inherited from DbContext
- XXX.Entities.tt - POCO entities
- XXX.Mappings.tt - fluent mappings for each entity
BUT you need to setup path to your edmx data model manually. Each of these templates have line
string inputFile = @"$edmxInputFile$";
. You need to provide name of your edmx file here:string inputFile = @"Northwind.edmx";
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