What are some examples of model binding in MVC?

What are some examples of model binding in MVC?

Model binding in MVC is a process that maps data from HTTP requests to action method parameters. For example, if you have a form with fields for 'Name' and 'Age', MVC can automatically bind these values to a model class when the form is submitted.

Can you show me a code example?

Sure! Here's a simple example:

public class Person {
    public string Name { get; set; }
    public int Age { get; set; }
}

public IActionResult Create(Person person) {
    if (ModelState.IsValid) {
        // Save person to the database
    }
    return View(person);
}

In this example, when a form is submitted, the values for 'Name' and 'Age' will be automatically bound to the 'person' parameter.

What if the model has complex types?

Great question! MVC can handle complex types as well. For instance, if you have a model with a nested object, MVC will bind the properties of the nested object as long as the names match the form fields.

Can you give an example of that?

Absolutely! Here's an example:

public class Address {
    public string Street { get; set; }
    public string City { get; set; }
}

public class Person {
    public string Name { get; set; }
    public Address Address { get; set; }
}

public IActionResult Create(Person person) {
    if (ModelState.IsValid) {
        // Save person with address to the database
    }
    return View(person);
}

In this case, if your form has fields like 'Address.Street' and 'Address.City', MVC will bind them correctly to the 'Address' property of the 'Person' model.