C#•15mo ago

❔ builder.Services.AddDbContext<>

builder.Services.AddDbContext<UygulamaDbContext>( options => options.UseSqlServer(builder.Configuration.GetConnectionString("DefaultConnection")));

builder.Services.AddDbContext<UygulamaDbContext>( options => options.UseSqlServer(builder.Configuration.GetConnectionString("DefaultConnection")));

The 'options' here, where did it exactly come from, and we were also able to access it by putting a dot (options.)? Is it something like the callback in JavaScript?

5 Replies

Angius•15mo ago

It comes from the lambda

private SomeOptions _options = new();

public void DoStuff(Action<SomeOptions> setOptions)
{
    setOptions(_options);
}

private SomeOptions _options = new();

public void DoStuff(Action<SomeOptions> setOptions)
{
    setOptions(_options);
}

thing.DoStuff(options => {
    options.Name = "hello";
    options.Count = 78;
});

thing.DoStuff(options => {
    options.Name = "hello";
    options.Count = 78;
});

Angius•15mo ago

Because SomeOptions is a reference type, this is roughly what happens:

JakenVeina•15mo ago

it is precisely like a callback in JavaScript

moonOP•15mo ago

thanks a lot got it thanks

Accord•15mo ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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❔ builder.Services.AddDbContext<>