Hardcoded EF6 Connectionstring names used from dotnet core - entity-framework

Question

We have an existing .NET Framework library with Entity Framework 6 and static methods like this:
public class OrderManager
{
public static OrderDTO GetOrderByOrderId(int oid)
{
var entities = new MyEntities();
....
}
}
where MyEntities have a hardcoded connectionstring name
internal partial class MyEntities : DbContext
{
public SSE3Entities() : base("name=MyEntities") {}
}
When used in a ASP.NET application, the web.config have a connectionstrings defined like this:
<connectionStrings>
<add name="MyEntities" connectionString="metadata=res://*/M..." providerName="System.Data.EntityClient" />
</connectionStrings>
But how can I reuse this library in a aspnet core application. Tried:
{
"ConnectionStrings": {
"MyEnties": "metadata=res://*/M...",
},
"Logging": {
...
}
}
I know passing the connectionstring into the OrderManager constructor is what we should have done years ago, but changing it now requiers a lot of work.
Are there any ways we can make EF read the new configurations system?
Or could we maybe write some settings to the old ConfigurationManager?
I tried dropping in a web.config without any luck

Answer 1

add System.Configuration.ConfigurationManager from nuget
add a file app.config
.net core applictaion is a consle app, so it find app.config first
app.config:
<appSettings>
<add key="webpages:Version" value="2.0.0.0"/>
</appSettings>

Answer 2

This solution will work for ASPNET Core MVC 2.0, 2.2 and 3.0 In your app root go find the appsetting.json file and modify the connection string.
{
"ConnectionStrings": {
"DefaultConnection": "Data Source=DESKTOP-3R4MR9H\\SQLSERVER3R4MR9;Initial
Catalog=ASPNetCoreMVC;Persist Security Info=True;User
ID=sa;Password=********;"
},
"Logging": {
"LogLevel": {
"Default": "Warning"
}
},
"AllowedHosts": "*"
}