SQL Server connection string in Appsettings.json + .net Core 3.1 - sql-server

Question

I'm trying to setup and connect to my remote development SQL Server (SQL 2017) in appsettings.json within .NET Core 3.1, I have tried the following approaches yet without any success.
"ConnectionStrings": {
//"DefaultConnection1": "DATA SOURCE=[servername];UID=[username];PWD=[password];DATABASE=[databasename]",
//"DefaultConnection2": "Data Source=[servername]; Initial Catalog=[databasename];User ID=[username];Password=[password]",
//"DefaultConnection3": "DataSource=[servername];Initial Catalog=[databasename];User Id=[username];password=[password]",
"DefaultConnection4": "Server=[servername];Database=[databasename];User Id=[username];password=[password];Trusted_Connection=False;MultipleActiveResultSets=true;"
},
Error of DefaultConnection1:
ArgumentException: Keyword not supported: 'uid'.
Microsoft.Data.Sqlite.SqliteConnectionStringBuilder.GetIndex(string
keyword))
Error of DefaultConnection2:
ArgumentException: Keyword not supported: 'initial catalog'.
Microsoft.Data.Sqlite.SqliteConnectionStringBuilder.GetIndex(string
keyword)
Error of DefaultConnection3:
ArgumentException: Keyword not supported: 'initial catalog'.
Microsoft.Data.Sqlite.SqliteConnectionStringBuilder.GetIndex(string
keyword)
Error of DefaultConnection4:
ArgumentException: Keyword not supported: 'server'.
Microsoft.Data.Sqlite.SqliteConnectionStringBuilder.GetIndex(string
keyword)
Any ideas, pointers or help is much appreciated.

Answer 1

thanks for your help and advice, i might have just found the solution and am able to connection the SQL database successfully now, the problem was as following:
The following package was installed on the solution:
Microsoft.Data.Sqlite.SqliteConnectionStringBuilder
in Startup.cs the following line was used in the ConfigureServices(IServiceCollection services):
services.AddDbContext<ApplicationDbContext>(options => options.UseSqlLite(Configuration.GetConnectionString("DefaultConnection")));
However after research i found out that i should rather use the following line:
services.AddDbContext<ApplicationDbContext>(options => options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));
Which was not accessible due the following package missing:
Microsoft.EntityFrameworkCore.SqlServer
After installing this package via package Manager using the following command:
Install-Package Microsoft.EntityFrameworkCore.SqlServer
I was able to access the SQL server using the following connection string:
"ConnectionStrings": {
"DefaultConnection": "Server=[servername];Database=[databasename];Persist Security Info=True;User ID=[username];Password=[password];MultipleActiveResultSets=True;"
},
For safety, as Christian pointed out, I removed also the other connectionstring references.

Answer 2

Probably it's just because you're not supposed to put comments (//) in JSON as JSON is a data format and doesn't support comments. So try actually removing the lines starting with // from your config.

Answer 3

Your setup in appsettings.json is fine.
Suppose the model in your cs file is mytestModel.
Here is the code to read the connection string:
public class mytestModel : PageModel
{
public string connectstring = "";
private IConfiguration MyConfiguration;
public mytestModel (IConfiguration _configuration)
{
MyConfiguration = _configuration;
}
public void OnGet()
{
connectstring = this.MyConfiguration.GetConnectionString("DefaultConnection4");
}
}
It should be noted that the type of model (eg. PageModel) does not matter. The name of the model is what matters.