Unable to resolve service for type while attempting to activate

Question

I have one file Repository.cs that contains an interface and its implementation like so:

public interface IRepository

{
    IEnumerable

        

Answer 1

We are getting this error in Entity frame work core database first approach. I followed below steps and error got resolvedenter code here

Step 1: Check Your context class constructor should be like this

public partial class ZPHSContext : DbContext
{
    public ZPHSContext(DbContextOptions dbContextOptions):base(dbContextOptions)
    {
    }
}

Step 2: In Startup file

public void ConfigureServices(IServiceCollection services)
{
    services.AddMvc();
    services.AddDbContext(options => options.UseSqlServer(Configuration.GetConnectionString("BloggingDatabase")));
}

Step 3: Connection string in appsettings

"ConnectionStrings": {
    "BloggingDatabase": "Server=Server=****;Database=ZPHSS;Trusted_Connection=True;"
}

Step 4: Remove default code in OnConfiguring method in context class

protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
{
}