appsettings.json change connection string on runtime - entity-framework

Question

Asume i have 4 servers with 4 dbs they have all the same catalog.
it is possible to change {serverLocation} on runtime ?
"ConnectionStrings": {
"Euro": "Data Source=campus-db-{serverLocation};Initial Catalog=Shool;Integrated Security=True"}
method should look something like that:
[HttpGet]
public async Task<IActionResult> GetStock(int id, string serverLocation)
{
var queryStock = _context.TblItem.FindAsync(id);
return Ok(queryStock);
}
The idea is that i need only 1 DBContext 1 Model because on all 4 servers the catalog are the same and database structure

Answer 1

you can write like this but i am not sure
IConfiguration _configuration;
public StockManager(IConfiguration configuration)
{
_configuration = configuration;
}
public object FindAsync(int id,serverLocation)
{
//do stuff
_configuration.GetConnectionString($"ConnectionStrings:{serverLocation}");
}

Answer 2

This might help you, please check.
public void ConfigureServices(IServiceCollection services)
{
services.AddControllers();
services.AddDbContext<ApplicationDbContext>(
options =>
{
var httpContext = serviceProvider.GetService<IHttpContextAccessor>().HttpContext;
var httpRequest = httpContext.Request;
// Now you can get access to the http context here, do what ever you want to do here with httpRequest.
// write conditional statements here like
if(somecondition-a)
options.UseSqlServer("name=ConnectionStrings:Connection-A"));
if(somecondition-b)
options.UseSqlServer("name=ConnectionStrings:Connection-B"));
}
}
For more infor check this docs
If that do not help, try this approach
public void ConfigureServices(IServiceCollection services)
{
services.AddDbContextFactory<ApplicationDbContext>(
options =>
{
var httpContext = serviceProvider.GetService<IHttpContextAccessor>().HttpContext;
var httpRequest = httpContext.Request;
// Now you can get access to the http context here, do what ever you want to do here with httpRequest.
// write conditional statements here like
if(somecondition-a)
options.UseSqlServer("name=ConnectionStrings:Connection-A"));
if(somecondition-b)
options.UseSqlServer("name=ConnectionStrings:Connection-B"));
}
}