实体数据模型向导错误 (MVC)

Entity Data Model Wizard error (MVC)

我在尝试添加 postgres 时遇到错误,询问我想使用哪个版本的 entity framework 我收到以下错误:

Your project references the latest version of Entity Framework; however, an Entity Framework 3 database provider compatible with this version could not be found for your data connection. If you have already installed a compatible provider, ensure you have rebuilt your project before performing this action. Otherwise, exit this wizard, install a compatible provider, and rebuild your project before performing this action.

我已经使用教程 (https://github.com/npgsql/npgsql/wiki/Visual-Studio-Design-Time-Support---DDEX-Provider#install-entityframework-6-npgsql-and-npgsqlentityframework-from-nuget) 重新创建了项目并安装了 npgsql,但我仍然遇到同样的错误。

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有什么建议吗?

你应该这样做:

打开 Nuget:

1.Pre-安装entityframework

2.Install Npgsql.entityframework

  1. 重建您的项目。

希望对您有所帮助;)