asp.net core docker Part 22 Including and excluding properties from model binding using interfaces

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In this video we will discuss, including and excluding properties from model binding using interfaces. Please watch Part 21, before proceeding.

In part 20, we have seen how to include and exclude properties from model binding, by passing a string array to UpdateModel() method, and in part 21 we have seen achieving the same using "BIND" attribute.

To include and exclude properties from model binding using interfaces
Step 1: Create an interface "IEmployee" as shown below. Notice that this interface, has got only the properties that we want to include in model binding. "Name" property is not present. This means, "Name" property will be excluded from model binding. Copy and paste this code in "Employee.cs" class file in "BusinessLayer" project
public interface IEmployee
{ int ID { get; set; } string Gender { get; set; } string City { get; set; } DateTime? DateOfBirth { get; set; }
}

Step 2: Make "Employee" class inheirt from IEmployee interface
public class Employee : IEmployee
{ public int ID { get; set; } public string Name { get; set; } [Required] public string Gender { get; set; } [Required] public string City { get; set; } [Required] public DateTime? DateOfBirth { get; set; }
}

Step 3: Modify "Edit_Post()" controller action method that is present in "EmployeeController.cs" file, as shown below.
[HttpPost]
[ActionName("Edit")]
public ActionResult Edit_Post(int id)
{ EmployeeBusinessLayer employeeBusinessLayer = new EmployeeBusinessLayer(); Employee employee = employeeBusinessLayer.Employees.Single(x =] x.ID == id); UpdateModel[IEmployee](employee); if (ModelState.IsValid) { employeeBusinessLayer.SaveEmmployee(employee); return RedirectToAction("Index"); } return View(employee);
}

Notice that we are explicitly calling the model binder, by calling UpdateModel() function passing in our interface IEmployee. The model binder will update only the properties that are present in the interface.

So, if we were to generate a post request using fiddler as we did in the previous session, "Name" property of the "Employee" object will not be updated.

So, in short, there are several ways to include and exclude properties from Model Binding. Depending on the architecture and requirements of your project, you may choose the approach that best fits your need.

asp.net core docker Part 22 Including and excluding properties from model binding using interfaces
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