EF7在运行时更改连接字符串 [英] EF7 change connectionstring at runtime

问题描述

在先前版本的EF中，我们能够如下更改dbcontext连接字符串：

In the previous versions of EF we were able to alter the dbcontext connection string as below :

context.Database.Connection.ConnectionString = "the new connectionstring";

如何使用EF7做到这一点？

How can we do this with EF7?

谢谢

推荐答案

我找到了解决方案：
https://github.com/aspnet/EntityFramework/wiki/Configuring-a-DbContext#config-from -外部代码

上下文代码

public class BloggingContext : DbContext
{
public BloggingContext(DbContextOptions options)
    : base(options)
{ }

public DbSet<Blog> Blogs { get; set; }
}

应用程序代码

var optionsBuilder = new DbContextOptionsBuilder();
optionsBuilder.UseSqlServer(@"Server=.\SQLEXPRESS;Database=Blogging;integrated security=True;");
var context = new BloggingContext(optionsBuilder.Options);

谢谢

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