ASP.NET Core - MVC - Bootstrap - Responsive Web Programming Lecture 7: Model Binding, Entity FMWK

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In Lecture 7:

* What are Models in ASP.NET MVC
* How to use Entity framework in ASP.NET MVC Core to do database operations
* How to do old-school style form / action postback with ASP.NET MVC Core
* How to update / insert database with form action postback by using Entity Framework
* What is model binding in ASP.NET MVC
* How to use model binding to do client - server communication with postback
* How to properly use attribute routing to do server side postbacks as wanted
* Simple database generation to do model / postback / update / select database examples
* MS-SQL server profiler to analyze Entity Framework queries
* How to use route order to handle order of conflicting attribute routing

What are Models in ASP.NET MVC:
In the ASP.NET MVC framework, a Model is a representation of the data and business logic that is used by the application. It is responsible for managing data and its state, and interacts with the database and the controller. A model can be used to retrieve, update, and delete data from the database, and is also used to validate user input. In the MVC pattern, the model represents the "M" in MVC, which is responsible for handling the data and business logic of the application.

How to use Entity Framework in ASP.NET MVC Core to do database operations:
Entity Framework is an Object-Relational Mapping (ORM) framework that provides a way to interact with a database using .NET objects. To use Entity Framework in an ASP.NET MVC Core application, you first need to install the Entity Framework Core package using NuGet. Then, you can create a database context class that inherits from the DbContext class, which allows you to interact with the database using .NET objects. Finally, you can use LINQ queries to query, insert, update, and delete data from the database.

How to do old-school style form / action postback with ASP.NET MVC Core:
In ASP.NET MVC Core, you can use the Html.BeginForm helper method to create a form that submits data back to the server using the HTTP POST method. The form's action attribute specifies the URL of the controller action that will handle the form submission, and the method attribute should be set to "POST". Inside the controller action method, you can retrieve the form data using the Request.Form collection or by using model binding.

How to update / insert database with form action postback by using Entity Framework:
To update or insert data into a database using Entity Framework in an ASP.NET MVC Core application, you can first create an instance of the database context class. Then, you can create a new instance of the model class that represents the data to be updated or inserted. Finally, you can use the DbContext.SaveChanges method to save the changes to the database.

What is model binding in ASP.NET MVC:
Model binding is the process of mapping incoming HTTP request data to controller action method parameters or model properties. In an ASP.NET MVC application, model binding is used to automatically bind form data, query string parameters, and route data to controller action method parameters or model properties.

How to use model binding to do client-server communication with postback:
In an ASP.NET MVC Core application, you can use model binding to automatically bind incoming HTTP request data to model properties. This can be done by specifying the model type as a parameter of the controller action method. The model binding system will automatically map the incoming request data to the model properties based on their names.

How to properly use attribute routing to do server side postbacks as wanted:
Attribute routing is a feature in ASP.NET MVC Core that allows you to define routes directly on controller action methods or controllers using attributes. To use attribute routing in an ASP.NET MVC Core application, you can define routes using the [Route] attribute on controller action methods or controllers. You can also define route templates that specify placeholders for parameters, which can be bound using model binding.

Simple database generation to do model / postback / update / select database examples:
To generate a simple database for use in an ASP.NET MVC Core application, you can use the Entity Framework Core CLI tools to scaffold a database.