[ASP.NET]-Connection String Manipulation in ApplicationDbContext - asp.net

Question

I had a challenge today at work (Solved already but I'll like to put it out here maybe there is a better and smarter way of doing it)
I am working on VSTS with git on a project with another developer.
We use different connection strings so what we do is when I pull, I comment his connection string and activate mine.
When he pulls, he comments mine and activates his.
We don't want to create another git-branch.
What is the best way to achieve this?

Answer 1

Here is an instance of how I did it.
Editing my Web.Config file
Note: the names: DefaultConnection, LocalConnection, livedbsource, localdbsource, localMachineName
<connectionStrings>
<!--Live-->
<add name="DefaultConnection" connectionString="Data Source=livedbsource;Initial Catalog=livedbname;Integrated Security=True;Connect Timeout=30;Encrypt=False;TrustServerCertificate=True;ApplicationIntent=ReadWrite;MultiSubnetFailover=False;MultipleActiveResultSets=true;" providerName="System.Data.SqlClient" />
<!--Dev-->
<add name="LocalConnection" connectionString="Data Source=localdbsource;Initial Catalog=localdbname;Integrated Security=True;Connect Timeout=30;Encrypt=False;TrustServerCertificate=True;ApplicationIntent=ReadWrite;MultiSubnetFailover=False;MultipleActiveResultSets=true;" providerName="System.Data.SqlClient" />
</connectionStrings>
And for the ApplicationDbContext
static string ServerName = System.Net.Dns.GetHostName();
//setting what connection string to use - tenary operator
static string ConnectionStringID = (ServerName == "localMachineName") ? "LocalConnection" : "DefaultConnection";
public ApplicationDbContext()
: base(ConnectionStringID, throwIfV1Schema: false)
{
}
On Windows 7 and higher, You can get the localMachineName pressing the Windows Logo and searching for System Information, then look for 'System Name'
Here is the YouTube video I did it in Visual Studio 2017 on a live project and it worked.
https://youtu.be/oKg6ewKhkYs