问题描述
我有一个使用ASP.NET MVC 4,Entity Framework 6和MySQL的现有站点。我试图将其升级到ASP.NET 5,但是要继续使用Entity Framework 6,因为实体框架缺少一些功能,并且还不支持MySQL。如何在ASP.NET 5中使用EF6?由于Web.config不再与ASP.NET 5一起使用,您需要使用来配置它。为此,创建一个继承自DbConfiguration的新类:
public class MyDbConfiguration:DbConfiguration
{
public MyDbConfiguration()
{
//注册ADO.NET提供者
var dataSet =(DataSet)ConfigurationManager.GetSection(system.data);
dataSet.Tables [0] .Rows.Add(
MySQL数据提供者,
.Net框架数据提供者为MySQL,
MySql.Data.MySqlClient ,
typeof(MySqlClientFactory).AssemblyQualifiedName
);
//注册实体框架提供者
SetProviderServices(MySql.Data.MySqlClient,新的MySqlProviderServices());
SetDefaultConnectionFactory(new MySqlConnectionFactory());
}
}
配置的第一部分是一个黑客注册ADO.NET提供程序通过动态地向 system.data
部分添加新的配置条目。这是非常诡异的,但确实似乎正常工作。
将连接字符串添加到 config.json
而不是 Web.config
:
{
Data {
DefaultConnection:{
ConnectionString:Server = localhost; Database = test; Uid = test; Pwd = password;
}
}
}
修改 DbContext
使用正确的配置和连接字符串:
[DbConfigurationType(typeof(MyDbConfiguration) )]
public class MyContext:DbContext
{
public MyContext(IConfiguration config)
:base(config [Data:DefaultConnection:ConnectionString])
{
}
// ...
}
注册 MyContext
在 Startup.cs
中的依赖关系注入容器中:
public void ConfigureServices(IServiceCollection services)
{
// ...
services.AddScoped< MyContext>();
}
然后你可以使用构造函数注入来获取 MyContext
进入您的控制器。
我的博客文章中的更多详细信息,请访问,以及
I have an existing site that uses ASP.NET MVC 4, Entity Framework 6 and MySQL. I'm trying to upgrade it to ASP.NET 5, but want to continue using Entity Framework 6 as Entity Framework is missing some features and does not yet support MySQL. How do I use EF6 in ASP.NET 5?
Since Web.config is no longer used with ASP.NET 5, you need to use code-based configuration to configure it instead. To do so, create a new class that inherits from DbConfiguration:
public class MyDbConfiguration : DbConfiguration
{
public MyDbConfiguration()
{
// Register ADO.NET provider
var dataSet = (DataSet)ConfigurationManager.GetSection("system.data");
dataSet.Tables[0].Rows.Add(
"MySQL Data Provider",
".Net Framework Data Provider for MySQL",
"MySql.Data.MySqlClient",
typeof(MySqlClientFactory).AssemblyQualifiedName
);
// Register Entity Framework provider
SetProviderServices("MySql.Data.MySqlClient", new MySqlProviderServices());
SetDefaultConnectionFactory(new MySqlConnectionFactory());
}
}
The first part of the configuration is a hack to register the ADO.NET provider at runtime, by dynamically adding a new configuration entry to the system.data
section. This is very hacky, but does appear to work correctly.
Add the connection string to config.json
rather than Web.config
:
{
"Data": {
"DefaultConnection": {
"ConnectionString": "Server=localhost; Database=test; Uid=test; Pwd=password;"
}
}
}
Modify the DbContext
to use the correct configuration and connection string:
[DbConfigurationType(typeof(MyDbConfiguration))]
public class MyContext : DbContext
{
public MyContext(IConfiguration config)
: base(config["Data:DefaultConnection:ConnectionString"])
{
}
// ...
}
Register MyContext
in the dependency injection container in Startup.cs
:
public void ConfigureServices(IServiceCollection services)
{
// ...
services.AddScoped<MyContext>();
}
Then you can just use constructor injection to get MyContext
into your controllers.
More details in my blog post at http://dan.cx/2015/08/entity-framework-6-mysql-aspnet, and a sample project at https://github.com/Daniel15/EFExample
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