如何从 DBContext（实体框架核心）中的 App.config（不是 .net 核心应用程序）中读取值

Question

I'm using my old application (Standard .net framework wpf app) with new entity framework core.

I've set up connection to database by hardcoding connection string here:

protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
{
   optionsBuilder.UseSqlServer(@"server=baaa;database=baaa;User=saaa;Password=xsaa1;");
}

But I would like to move my connection string to App.config or somewhere else and read it from there instead of keeping it hardcoded.

Since my WPF app is not .net core WPF app I can't use DI to write something like this:

IConfigurationRoot configuration = new ConfigurationBuilder()
                .SetBasePath(Directory.GetCurrentDirectory())
                .AddJsonFile("appsettings.json")
                .Build();

So question is how to read connection string from my old WPF (.NET FRAMEWORK) App in DbContect of entity framework core?

Thanks

Cheers

Answer 1

You can use Microsoft's ConfigurationManager It exists both in .net core and .net framework. at .net core you can add simply from nuget, and at.framework just add the system.configuration dll

read app-setting:

 var version=ConfigurationManager.AppSettings["APP_SETTING_KEY"].ConnectionString;

read connection string:

 var cs =ConfigurationManager.ConnectionStrings["YOUR_CS_KEY"].ConnectionString;