var connectionString = ConfigurationManager.ConnectionStrings["Default"].ConnectionString;
connectionString.Expand() // returns "server=db01.mycompany.com;uid=uid;pwd=pwd;Initial Catalog=master;"
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// AppSettingsController.cs
[Route("appsettings")]
public class AppSettingsController : Controller
{
...
[Route("first-way")]
public IActionResult FirstWay()
{
return Content(_configuration.GetValue<string>("RoundTheCodeSync:Title"), "text/plain");
}
}<configuration>
<appSettings>
<add key="Domain" value="mycompany.com"/>
<add key="ServerName" value="db01.{Domain}"/>
</appSettings>
<connectionStrings>
<add name="Default" connectionString="server={ServerName};uid=uid;pwd=pwd;Initial Catalog=master;" provider="System.Data.SqlClient" />
</connectionStrings>
</configuration>