Replace connection string in Scaffold-DbContext - asp.net

Question

I'm trying to learn by doing and it has been a fun struggle so far :D
I've finally got my project to scaffold my DB but it populates a warning in the code.
protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
{
if (!optionsBuilder.IsConfigured)
{
#warning To protect potentially sensitive information in your connection string, you should move it out of source code. See http://go.microsoft.com/fwlink/?LinkId=723263 for guidance on storing connection strings.
optionsBuilder.UseSqlServer("Server=<servername>;Database=<databaseName>;Trusted_Connection=True");
}
}
I've tried to update it to use the "DefalutConnection" in my appsettings.json file but it doesn't recognize Configuration. I've imported the namespace using Microsoft.Extensions.Configuration; but that still doesn't resolve the issue.
I'm trying to get something akin to the following: options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection"))
Not sure which direction to go in resolving this. Is this a non-issue or am I missing adding something to get this to pull from appsettings.json?
My guess is that the DbCOntextOptionsBuilder doesn't have a method for Configuration and I would need to build it out myself... but I'm not sure how to do that either.
Thanks for your time/attention on this.
Solution Shown to Assist Others, See Marked Answer Below
Error
Unable to create an object of type 'ProfileContext'. For the different patterns supported at design time, see https://go.microsoft.com/fwlink/?linkid=851728
add public IConfiguration Configuration {get;}
inject it in your constructor
public ContextDbName(IConfiguration configuration)
{
Configuration = configuration;
}
update your OnConfiguring method
protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
{
if (!optionsBuilder.IsConfigured)
{
#warning To protect potentially sensitive information in your connection string, you should move it out of source code. See http://go.microsoft.com/fwlink/?LinkId=723263 for guidance on storing connection strings.
optionsBuilder.UseSqlServer(Configuration.GetConnectionString("DefaultConnection"));
}
}

Answer 1

I think you need to inject Configuration into your DbContext constructor.

Answer 2

Running with the original script, created by Scaffolding, in the newly created context file I ran into other issues regarding dependency injection. This got me thinking more about Microsofts Documents.
So I added an injection into my startup file for my newly created Context class and like magic, it worked :D
Startup.cs:
services.AddDbContext<ApplicationDbContext>(options =>
options.UseSqlServer(
Configuration.GetConnectionString("DefaultConnection")));
services.AddDefaultIdentity<IdentityUser>(options => options.SignIn.RequireConfirmedAccount = true)
.AddEntityFrameworkStores<ApplicationDbContext>();
services.AddDbContext<ProfileContext>(options =>
options.UseSqlServer(
Configuration.GetConnectionString("DefaultConnection")));

Answer 3

You can use scaffold like this:
Scaffold-DbContext -Connection "This is the connectiostring" -Provider Microsoft.EntityFrameworkCore.SqlServer -OutputDir Data/Entities -ContextDir Data -Context "This is the contextname" -NoOnConfiguring -f
For your case -NoOnConfiguring will prevent to create the code with connectionstring (optionsBuilder.UseSqlServer)