Tutorials on ASP.NET Core and MVC

This is a collection of tutorials on asp.net and c-sharp languages.
(Rev. 12-Jul-2025)

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The Startup class in ASPNET Core

This tutorial explains the Startup class in ASP.NET, along with the methods of this class. We also explain how a custom middleware can be attached b . . .

Middleware in ASPNET Core

This tutorial explains everything necessary to get you started with the middleware in ASPNET Core. We explain the built-in middleware components as . . .

Exercise on Contact Form with Middleware in ASPNET Core

Use the concepts learnt till now, and without using razor, and without mvc framework, create a contact form that has a text box (cusName) and a date . . .

Routing and Route Templates in ASPNET Core

This is a summary of the concepts of routing and route templates in asp.net core. We have taken a practical exercise to develop the concepts in an i . . .

(C# ASP.NET Core)How to restrict access ONLY to requests from a specific list of domains and ports only

Write an ASP.NET Core application such that the route "/home/index/N", where N is any int number, executes only if the website is hosted o . . .

Metadata of Endpoints in ASPNET Core

Some, not all, routes need a daily downtime between 17 hrs to 18 hrs. So they have to be shut during that period so that no requests are processed. . . .

(ASP.NET Core AJAX) Ajax based POST of a Razor Page

How to POST an ASP.NET Core Razor FORM through an Ajax Request. We discuss a practical approach that is to-the-point and easy to understand. The giv . . .

(ASP.NET Core) Bare minimum code for a parameterized AJAX GET Request to a C# function

The following project has a textbox with a send button. The click event fires an AJAX GET request and sends a string parameter to an ASP.NET Core ap . . .

(ASP.NET Core) Master Slave Cascading Dropdowns with Ajax

In nutshell: The selection change event of the master dropdown is used to send the "id" of the selected item to the server, which sends ba . . .

(ASP.NET Core Ajax) Admin Panel with Content on the Right

This project is about creating an Admin Panel that would be suitable for a reporting project or an EBook that shows a table of links on the left and . . .

(C# ASP.NET Core Ajax) Authentication and Authorization with AJAX Requests

In brief: Just two additions are required to implement AJAX based authorization in your existing ASP.NET Core application - first is on the javascri . . .

(solved)Javascript and HTML5 scheme for inplace, inline editing of records

Pure Javascipt and html5 based general solution for in-place or in-line editing of the tr, td records of an html table. This solution is suitable fo . . .

(C# ASP.NET Core Ajax) Inline, In-place Edit, Update, Cancel of records without a page refresh

Simplest explanation of AJAX based Edit, Update, Cancel operations on a row of an HTML table. An ASP.NET Core POST handler receives the updated valu . . .

(C# ASP.NET Core Ajax) How to POST data with AJAX Independently of (i.e., without) a Form and hence solve the HTTP Bad Request Error 400

Anti-forgery token is NOT available outside of <form> tags. This article, alongwith the appended video, explains how to use IAntiforgery serv . . .

(C# ASP.NET Core) Status of the App_Data folder in ASP.NET Core and what is the way forward?

Looking for the "protected" App_Data folder in ASP.NET Core? The news is that it doesn't have that status anymore. It is no longer a & . . .

(C# ASP.NET Core) How to use XML as a database in ASP.NET Core

This is the simplest example of reading and updating a record. For simplicity, the record consists of just one property called Name. An input textbo . . .

(C# ASP.NET Core) Repository Pattern and Dependency Injection with XML as Database

This is a walkthrough on how to make calls to an XML database via repository pattern and dependency injection. We also give a brief introduction to . . .

(C# ASP.NET Core) Getting Started with Database Connectivity

Here is a to-the-point tutorial on how database connectivity works in ASP.NET Core. A 3-step roadmap is laid for running your first query to a datab . . .

(C# ASP.NET Core) Getting Started with Database INSERT of Form data

A form of only one input textbox is POSTed and the data is inserted into a sqlite database. This is a six step walkthrough that starts from creating . . .

(C# ASP.NET Core) Reading, Writing and Deleting Cookies in ASP.NET Core

We start this walkthrough with a small introduction to the concept of a cookie, and then we explain the various ASP.NET Core snippets to (a) create . . .

(C# ASP.NET Core) Cookie Consent Banner with ITrackingConsentFeature

This is a walkthrough on how to obtain user consent for usage of cookies on an asp.net core website. This project uses the ITrackingConsentFeature i . . .

(C# ASP.NET Core) _ViewImports file and the do's and don'ts

_ViewImports.cshtml is shared by all the razor pages in its peer directory, and in the sub-directories below it. It is like an include file, and it . . .

(C# ASP.NET Core) Concept of Areas and an Authorization Scheme

This is a comprehensive discussion on the need for "areas", and how to practically create "areas", and how, un-like classic MVC, . . .

(C# ASP.NET Core) Razor Components in the Context of Razor Pages Apps

Razor components are stand-alone, embeddable units that replace themselves with pure HTML, CSS and JS markup. They can accept parameters from the ho . . .

(C# ASP.NET Core) Partial Views from a Practical Perspective

So this article starts by explaining the various aspects of a partial view from a practical, day-to-day perspective. We have totally removed those p . . .

(C# ASP.NET Core) How to use Session for State Management

This article explains behind-the-scenes mechanism by which "Session" is implemented in ASP.NET Core. We also enumerate the four extension . . .

(C# ASP.NET Core) Displaying Data and OnGetAsync

This tutorial continues from where we left the tutorial on INSERT query (see the link below for a recap). The code we discussed there has been exten . . .

(C# ASP.NET Core) Serializing DateTime into Session

There is no built-in method for storing DateTime into a session variable in ASP.NET Core. However, the Microsoft MSDN docs suggest that developers c . . .

(C# ASP.NET Core) Deleting Records from a Database with EF Core

We start by explaining the general scheme for deleting a record from a table. A foreach loop adds an anchor link to each record. The primary key (id . . .

(C# ASP.NET Core) Editing Records on the same Razor Page with EF Core

This tutorial discusses the most desired scenario where data entry form and the already existing records are shown on the same page. Each record has . . .

(C# ASP.NET Core) When and how to use TempData

TempData can be used to pass data from one razor page to another. Although QueryString and Session variables can be used to achieve the same objecti . . .

(C# ASP.NET Core) CRUD with a Checkbox in a Razor Form

This tutorial extends the one-textbox FORM that we have implemented for CRUD operations in the previous tutorial (see link below). Now we add a chec . . .

(C# ASP.NET Core) CRUD with a Radiobuttonlist in a Razor Form

This tutorial extends the FORM that we have implemented in the previous tutorial (see link below). Now we add a radiobuttonlist to that form and obs . . .

(C# ASP.NET Core) CRUD with a Dropdownlist in a Razor Form

This tutorial extends the FORM that we have implemented in the previous tutorial (see link below). Now we add a dropdownlist to that form and observ . . .

(C# ASP.NET Core) Beginner's Introduction to Razor Pages

This is the simplest introduction to Razor Pages - why you need them, what they are, and how page events and data could be handled with them. See th . . .

(C# ASP.NET Core) Integrating CSS and JS Files with Razor Pages

This is a quick and complete explanation of how to integrate your razor pages to a framework such as bootstrap, and how to add and manage your cust . . .

(C# ASP.NET Core) Inter Page Navigation and Linking of Razor Pages with Anchor Tag Helpers

Tag helpers provide a standard way of generating html tags in razor pages. They are interpreted on server side. They are of the same syntax as html . . .

(C# ASP.NET Core) How to handle a click event in Razor Pages

An anchor tag helper can be used to specify the name of the click event handler. For this the attribute "asp-page-handler" is set equal to . . .

(C# ASP.NET Core) Creating an HTML FORM with Razor Pages

This is an introduction to the most common UI Elements that can be used on a FORM. The article starts with a quick introduction to an html form of o . . .

(C# ASP.NET Core) How to handle a FORM submit event

A form submit is triggerred by a submit button inside FORM tags. If the method is POST, which is most often the case, then the recommended handler i . . .

(C# ASP.NET Core) How to handle Server Side Validation

This article starts with a brief primer on server side validations and why they should be done. A simple model of just one property is used to expla . . .

(C# ASP.NET Core) Strategy to handle a DbUpdateException

SaveChanges can fail if a constraint fails, if a connection error occurs or if any generic error occurs. So it should always be wrapped in a try-cat . . .

(EF Core) Specifying Primary Key (s) and the DbSet.Find() method

This is a brief explanation of how to specify single primary key on a model through attributes - but this approach fails when multiple columns are t . . .

(C# ASP.NET Core) Configuring Role based Authorization

This is an explanation of how an "Area" based ASP.NET Core project can be configured for role and policy based authorization. Authorizatio . . .

(C# ASP.NET Core) SignIn, ReturnUrl and LocalRedirect

This article starts with an explanation of "SignIn", and then explains the various steps for a signin process. Finally, we discuss what is . . .

(C# ASP.NET Core) Displaying User Info on each Page he visits

This is a snippet on showing "You are logged as ..." on every page that an authenticated and authorized user visits. The code can be inser . . .

(C# ASP.NET Core) SignOutAsync with Tag Helpers

Following is a brief scheme on signing out a logged-in user. A function for sign-out is written in the same file as for the login code. Then this fu . . .

(C# ASP.NET Core) Uploading file(s) and Storing in a Database

This is a quick and clean scheme for uploading files to a server. In the first part we demonstrate how to store them into a database table. And, in . . .

(C# ASP.NET Core) Downloading file(s) and FileResult

A file can be downloaded by returning a FileResult. This article explains how a FileResult is created. Finally, a walkthrough is given that shows a . . .

(C# ASP.NET Core LINQ) SingleOrDefault, Find, FirstOrDefault, Single and First

This is an explanation of SingleOrDefault, FirstOrDefault and Find methods from a practical point of view. We have explained when to use which one a . . .

(C# ASP.NET Core LINQ) Where, Include and ToList

This is an explanation of Where, Include and the ToList methods from a practical point of view. We have explained when to use which one and how to u . . .

(C# ASP.NET Core LINQ) Direct Execution of SQL Queries and Stored Procedures

EF Core translates your LINQ expressions into SQL language queries. However, sometimes it is easier, convenient and faster (as determined by testing . . .

(C# ASP.NET Core LINQ) How to Sort Records

A result set can be sorted in ascending as well as descending order. It is even possible to perform a chained sorting by using "ThenBy" an . . .

(C# ASP.NET Core) Practice Exercises and Questions on Razor Pages

(LEVEL IS BEGINNERS) Following is a collection of exercises and practice questions that help in cementing the concepts of asp.net core razor pages. . . .

(C# ASP.NET Core) Practice Exercises and Questions on Basic Event Handling in Razor Pages

(LEVEL IS BEGINNERS) These are practice questions and exercises on Basic Event Handling in Razor Pages. Solve them and join our course for their sol . . .

(C# ASP.NET Core) Practice Exercises and Questions on Database Connectivity

(LEVEL IS BEGINNERS) These are practice questions and exercises on Basic database connectivity in Razor Pages. Solve them and join our course for th . . .

(C# ASP.NET Core) Practice Exercises and Questions on Modularity

(LEVEL IS BEGINNERS) These are practice questions and exercises on Modularity in Razor Pages. Solve them and join our course for their solutions.

(C# ASP.NET Core) Minimal steps to use a Blazor Component in a Razor Page

Following are the minimal steps needed to run a hello world type of razor component that handles a click event. The component will have to be based . . .

(C# EF Core) MySQL Database Connectivity in an ASP.NET Core Razor Page Project

These are the minimal steps for connecting to a MySQL database server with EF Core. A simple application of one textbox form has been used to demons . . .

(C# ASP.NET Core) Practice Exercises and Questions on Areas and Partial Views

(LEVEL IS BEGINNERS) These are practice questions and exercises on Areas and Partial Views in Razor Pages. Solve them and join our course for their . . .

(C# EF Core) SQL Server Database Connectivity in an ASP.NET Core Razor Page Project

These are the minimal steps for connecting to a Microsoft SQL Server database with EF Core. A simple application of one textbox form has been used t . . .

(C# ASP.NET Core) What is Docker, Dockerfile, DockerImage and Containerization?

This article is a beginner's introduction to the terminology associated with docker files, docker images and containers. I have kept the explana . . .

(C# ASP.NET Core) How to Create a Docker Image with Visual Studio

This is a walkthrough on creating a docker image with visual studio. We start by creating a simple asp.net core project with sqlite database connect . . .

(C# ASP.NET Core) How to run a Docker Image with Docker Desktop

This is a walkthrough on running a docker image. We start by explaining the commands for listing the docker images on a computer. Then we explain th . . .

(C# ASP.NET Core) How to use Docker Volumes to Persist Data

In the previous tutorial we were able to run an image in a docker container. The docker container provided a RW memory for our project and also for . . .

(C# ASP.NET Core) How to Publish a Docker Image to DockerHub Registry with Visual Studio

This is a walkthrough on uploading a docker image to the docker hub registry. We shall upload the same hellodocker project and then verify the uploa . . .

(C# ASP.NET Core) How to Pull and run MS SQL Server Image in Docker Desktop

In this tutorial we shall learn how to pull and run the docker image of Microsoft SQL Server through the Docker Desktop program. In this same tutori . . .

(C# ASP.NET Core) Connectivity to SQL Server Running in a Docker Container

In this tutorial we shall learn how to connect an ASP.NET Core application to a SQL Server image that is running inside a docker container. Some dat . . .

(C# ASP.NET Core) Containerizing our Find a Doctor Project to DockerHub

In this tutorial we shall first create a docker image of our "Find a Docker" project. After that we shall publish that image to the Docker . . .

(EF Core) What are Database Migrations

In this tutorial we shall learn an introduction to the database migrations. This feature is provided by entity framework core through its command li . . .

(EF Core) Configuring Visual Studio for Database Migration

We shall start by creating a simple asp.net core project. Then we shall add nuget packages for a database such as Microsoft SQL Server. After that w . . .

(EF Core) Getting Started with your first EF Core Migration

In the previous tutorial we added the EF Core migration tools to our project. We shall now run our first migration to create a blank database and it . . .

(EF Core) Migration on Alterations to a Model

A real life project evolves over a period of time. This process necessitates additions and alterations to the model classes - properties are added, . . .

(EF Core) SQL Scripts for Migration

In this tutorial we learn that the recommended strategy for migrations is to migrate through SQL Scripts. We will also learn how to use ef core tool . . .

(C# ASP.NET Core) Environments in ASP.NET Core

This tutorial explains about the various environments like Development, Staging and Production. We also explain how to set them by various methods a . . .

(C# ASP.NET Core) Kestrel, IIS, IISHttpServer and HTTP.sys

An ASP.NET Core application cannot directly accept requests from the internet. For this it needs a server that can face the internet and help it com . . .

(C# ASP.NET Core) The launchSettings.json File and launch Profiles

We learn about the finer details of launchSettings.json file. This file contains various launch profiles to start an application in various modes - . . .

(C# ASP.NET Core) Logging in ASP.NET Core

Logging helps in troubleshooting, it helps in audit, it helps in getting signals of an imminent application crash. This topic explains the terminolo . . .

(C# ASP.NET Core) What and Why of the UseDeveloperExceptionPage Middleware

We shall create an app using visual studio 2022, running .NET 6. The application will artificially throw an un-handled exception. Then we shall veri . . .

(C# ASP.NET Core) Writing a Custom Exception Page and the UseExceptionHandler middleware

This tutorial continues our previous tutorial where we learnt that if an application is running under development environment, then ASP.NET Core pro . . .

(C# ASP.NET Core) Storing and Reading Configuration Key Value Data

We have seen in the previous tutorials that appSettings json file can be used to configure log levels. But this is not the only use of this file - i . . .

(C# ASP.NET Core) Using Options Pattern to Read Configuration

In the previous tutorial we read various properties of an appSettings configuration file. But there is a better method for reading complex propertie . . .

(C# ASP.NET Core) Collecting the Pre-requisites for Identity based Authentication

We shall create an identity based project from scratch. Although, visual studio provides a scaffolding for all the various modules, but personally I . . .

(C# ASP.NET Core) Adding a Login Page to an Identity based Authentication Project

This tutorial shall continue from the previous tutorial where we have made a basic initialization, and we have also created a database to hold the d . . .

(C# ASP.NET Core) Adding a Registration Page to an Identity based Authentication Project

The problem with the built-in registration page provided by ASP.NET Core Identity API is that it contains a lot of tags and bootstrap attributes tha . . .

(C# ASP.NET Core) Account Verification in an Identity based Authentication Project

Recall from the previous tutorial that in our program.cs file we have set SignIn.RequireConfirmedAccount = true. This prevents immediate login to a . . .

(C# ASP.NET Core) Resending an Account Verification EMail in Identity based Authentication

As soon as a new user registers on a website, an account verification email or an sms is immediately sent to him. But it is possible that a user nev . . .

(C# ASP.NET Core) Forgot Password functionality in Identity based Authentication

Very often a user is unable to remember the password that he created for a website. In such circumstances, the forgot password link comes to his res . . .

(C# ASP.NET Core) Reset Password functionality in Identity based Authentication

We have seen in the previous tutorial that when a user fills the forgot password form, then he is emailed a link to the reset password page. The lin . . .

(C# ASP.NET Core) Claim based Authorization with Identity

In its simplest terms, a claim is a name-value pair used to verify authorization. For example, you may be authorized to access a page if a claim of . . .

(C# ASP.NET Core) Layout Pages and LoginPartial for Identity

It is a good idea to show the user name of a logged user in the header of each page of a website. And, if the user is not logged in, then the login . . .

(C# ASP.NET Core) Sign out functionality in Identity based Authentication

A sign out link allows a logged user to log out of your website. It is usually shown in the header of a page and close to the name of the logged in . . .

(C# ASP.NET Core) Account Lockout Functionality in Identity

You must have seen on various websites that a user account gets locked if the user makes about three unsuccessful login attempts. The exact same fun . . .

(C# ASP.NET Core) Enabling 2-factor Authentication in Identity

Two factor authentication gives additional security to a login process. But this type of authentication has to be specifically enabled by a user. Fo . . .

(C# ASP.NET Core) Login with 2-Factor Authentication

Consider a user who has enabled 2-factor authentication as explained in the previous tutorial. Such a user is required to authenticate twice before . . .

(C# ASP.NET Core) Disabling 2-Factor Authentication

The purpose of this tutorial is to add the functionality that allows a user to disable his 2-factor authentication. For this we shall have to modify . . .

(C# ASP.NET Core) Getting Started with Web Api

This tutorial starts with a beginner's introduction to the concept of web api. After that we create a basic structure of a project that will hel . . .

(C# ASP.NET Core) Minimal GET WebApi with No Parameters

In this tutorial we shall add a web api that allows us to get all the records of a table. Please do note, however, that such a query is never done i . . .

(C# ASP.NET Core) Minimal GET WebApi with a Parameter of Numeric Type

In the previous tutorial we learned how to write a web api that accepts no parameters. We executed it to return all the records of a table. In this . . .

(C# ASP.NET Core) Minimal GET WebApi to Find a Record by Id

In this tutorial we shall add a web api of GET type that takes an ID as a parameter and returns a record for that parameter.

(C# ASP.NET Core) Using Postman to Run WebApi

Postman is a software that can be used to easily and conveniently run and execute web api. It can be installed as a desktop application. The softwar . . .

(C# ASP.NET Core) Minimal POST WebApi for Creating a new Record

A web api of the POST type is used to create a new record. For example, if we have to create a new record of a doctor, then we have to use a POST ap . . .

(C# ASP.NET Core) Minimal PUT WebApi for Updating a Record

An Http PUT request is used to update an existing record. For this, a client has to send the unique id of the record along with the entire updated r . . .

(C# ASP.NET Core) Minimal DELETE WebApi for Deleting a Record

An HTTP DELETE request is used for deleting a record. The Server sends a 200 OK response on successful deletion alongwith the item that was deleted. . . .

(C# ASP.NET Core) Over-Posting in WebApi and a Solution with Data Transfer Object

We have been working with a model class consisting of three properties - id, Name and Fees. All the three properties have participated and have been . . .

(C# ASP.NET Core) Preventing Over-Posting of a Collection in a WebApi

If an API has to return a collection of records, and if we do not want entire objects transmitted, then we can use a Data Transfer Object to return . . .

(C# ASP.NET Core) DTO Object as Argument and Return in a WebApi

This tutorial explains how to modify a POST type of WebApi so that it doesn't over-post data. A POST WebApi receives a data object as a paramete . . .

(C# ASP.NET Core) Calling a GET WebApi from a C++ WinRT App

This tutorial explains how a GET web api can be called from a C++ WinRT application. I have chosen WinRT type because it contains a lot many pre-wri . . .

(C# ASP.NET Core) Calling a POST WebApi from a C++ WinRT App

This tutorial explains how a POST web api can be called from a C++ WinRT application. I have created a WinRT console application that connects to, . . .

(C# ASP.NET Core) OpenAPI and Swagger for Web API Documentation

Swagger makes it easy to document the various Web Api exposed by your project. The summary of your API is maintained in a json based file called ope . . .

(C# ASP.NET Core) Configuring and Using Swagger to Run WebApi

Let us now configure our WebApi project to add support for SwaggerUI. As we told earlier, SwaggerUI is provided by both SwashBuckle and NSwag. We ca . . .

(C# ASP.NET Core) Call a GET Web API From a C# WPF Application

In this tutorial we shall learn how to call the various types of WebApi from a C# WPF application. I have already created a WPF application that obt . . .

(C# ASP.NET Core) Call a POST Web API From a C# WPF Application

This tutorial continues from the previous tutorial. We have discussed most of the parts there. So please go through the previous tutorial for a cont . . .

(C# ASP.NET Core) Call a PUT and DELETE Web API From a C# WPF Application

As you must have already seen in the previous tutorials, we have a WPF application that obtains a list of records from our ASPNET Core web api appli . . .

(C# ASP.NET Core) Introduction to HttpRepl for Testing Web Api

Http Repl is a command-line tool for testing web api. This tool targets the ASP.NET Core environment. Let's have a look at a brief introduction . . .

(C# ASP.NET Core) Connecting HttpRepl to a Web Api Endpoint

Before we can execute and test any web api, we have to establish a connection between httprepl and our web server. If you are following this chapter . . .

(C# ASP.NET Core) Testing a GET Web Api with HttpRepl

Now its time to use httprepl for testing our web api. To begin with, we shall test a GET api. I shall assume that your httprepl is installed and rea . . .

(C# ASP.NET Core) Testing a POST Web Api with HttpRepl

In this tutorial we shall test a POST Web Api - and create a new record. So we shall have to first establish a connection between httprepl and our w . . .

(C# ASP.NET Core) Using a static class for Route Handlers in a Minimal WebApi

So far, we have been writing all our minimal web api in the program.cs file. But this can become un-manageable and un-readable in a full blown proje . . .

(C# ASP.NET Core) [FromQuery] Parameter Binding of a QueryString Variable

We have been obtaining our web api parameters from route templates. A route is not the only source of parameters - in fact the parameters can be obt . . .

(C# ASP.NET Core) [FromHeader] Parameter Binding of a Request Header

Parameters of a web api can be obtained from the values in a request header also. For this an attribute called "FromHeader" is used to dec . . .

(C# ASP.NET Core) Special Types of Implicit Parameter Bindings

ASP.NET Core provides certain "special" parameters that are always available to an api handler. These parameters are "utility" p . . .

(C# ASP.NET Core) Customized Binding of API Parameters

Consider a web api that extracts parameters x, y and z from its query string and then uses these values to construct a Point object, say for example . . .

(C# ASP.NET Core) BindAsync for Customized Binding of WebApi Parameters

BindAsync is a second method for custom binding of parameters. The first one - TryParse - is good for cases where the items are available in a singl . . .

(C# ASP.NET Core) File Upload with a WebApi

In this tutorial we examine how to write a web api that accepts an uploaded file and saves it to a server. We shall also present a C# console applic . . .

(C# ASP.NET Core) Basic Authentication in WebApi

Basic Authentication is not encourged by ASP.NET Core because login id and password are sent as plain text in the request header - it's vulnerab . . .

(C# ASP.NET Core) HandleAuthenticateAsync and Basic Authentication in WebApi

The recommended way of implementing a custom authentication scheme is by deriving a class from AuthenticationHandler and implementing the HandleAuth . . .

(C# ASP.NET Core) JWT Authentication in WebApi

JWT stands for JSON Web Token. In its simplest form, JWT authentication is a two step process. First a client obtains a JWT token from the server. T . . .

(C# ASP.NET Core) C# Console App Connectivity for Basic and JWT Authentication

In this tutorial we present a C# console application that connects to the web api that we have done in the previous tutorial. This app will first ob . . .

(C# ASP.NET Core) Creating a Google OAuth App for Authentication

Social media based authentication requires us to create an oauth app on a social media platform such as google, facebook, twitter, github. This app . . .

(C# ASP.NET Core) Social Media based Authentication, Remember Me and Signout

Social media based login provides a neat and user-friendly means of logging into your website. Users are more likely to trust this method because of . . .

(WebApi C# ASP.NET Core) Social Media Authentication in WebApi

WebApi can be protected through social media authentication also. The first step is to obtain a client id and a client secret by creating an app on . . .

(CORS C# ASP.NET Core) How Cross Origin requests (CORS) fail - example with ajax javascript

We shall run two ASPNET Core apps concurrently - the first exposes a web API, whereas the other shows a web page containing two links - the first of . . .

(CORS C# ASP.NET Core) Why cross-origin requests (CORS) fail and why they succeed?

In the previous tutorial, we demonstrated how a browser blocks cross-origin calls. So you must surely be wondering why cross-origin requests to CDN- . . .

(CORS C# ASP.NET Core) Enabling CORS with a Policy

An ASPNET Core application can permit cross-origin requests by adding "Access-Control-Allow-Origin" header to the HTTP response. Cross-ori . . .

(CORS C# ASP.NET Core) Enabling CORS for Specific CSS or JS Files

Static files are NOT accessible cross-origin if we call UseStaticFiles before UseCors. But if we reverse the order, every static file becomes access . . .

(CORS C# ASP.NET Core) Primer on CORS Preflight Requests

Browsers consider some cross-origin requests as unsafe. For example, an HTTP PUT request is considered unsafe. A browser first queries the server if . . .

(CORS C# ASP.NET Core) Configuring CORS Preflight Policy

In this tutorial, we learn how to set a CORS policy that will respond to a pre-flight OPTIONS request. This policy will specify the list of acceptab . . .

(CORS C# ASP.NET Core) Credential Cookies with Cross-Origin Requests

By default, a browser doesn't send authentication cookies with cross-origin requests. It sends cookies only if the javascript code sets a proper . . .

(CORS C# ASP.NET Core) Practical Verification of Credential Cookies

In this tutorial, we have two applications - the first is an ASPNET Core application that implements a CORS policy to accept cookies from the second . . .

(EFCore Best Practices) Set a SQL Server Project

In this tutorial we shall set a project to use SQL Server as our database. You can obtain this project from the downloads attached to this video. Bu . . .

(EFCore Best Practices) Identify Slow Commands with Logging and Tags

EF Core provides logs that help us determine the time taken by a specific query to finish. The logs also display the actual SQL query that was execu . . .

(EFCore Best Practices) Comparison of Select, Projection, Tracking and Execution in Database

We shall use various methods to calulate the sum of prices of all the records in the items table. We will also take note of the times taken. Usually . . .

(EFCore Best Practices) Lazy Loading and the n+1 problem

Lazy loading is a great O/RM pattern that AUTOMATICALLY loads dependent (child) data when it is first accessed. The delayed loading is both an advan . . .

(EFCore Best Practices) Buffering and Streaming of Resultset

A query can first store the entire resultset into memory, and then use a foreach loop to process each item. Alternatively, it can stream each result . . .

(EFCore Best Practices) Raw SQL with FromSqlRaw for Efficiency

Suppose your database team have already provided you an optimized query in SQL syntax. Or let's say you have a legacy, old setup that makes it c . . .

(EFCore Best Practices) Stored Procedures and Secure Parameterization to Prevent SQL Injection attacks

Raw SQL queries and Stored Procedures can be executed with the FromSqlRaw extension. It is very common that these queries and procedures require par . . .

(EFCore Best Practices) Batching in EF Core and Planning your Bulk Updates

EF Core uses batching to execute bulk updates in a single trip to the database. You can always fine-tune your code by carefully sequencing your stat . . .

(C# ASP.NET Core) Program Example on Data Display and FORM Update

(LEVEL IS BEGINNERS) Suppose there is a model called StudentData with properties ID, Name, School and Marks. Also suppose we already have a collecti . . .

C# ASP.NET Core Projects with Step-by-Step Explanation and SOURCE CODE

Get ALL these ASP.NET Core Projects with Source Code + step-by-step Video Explanation in $5 [INR Rs. 400]. A few to name - "Find a Doctor" . . .

(C# ASP.NET Core) Billing, Inventory and Shopping with BarCodes ASP.NET Core Project

Customers visit a retail store and use their mobile phone camera to scan barcodes to add items to their shopping cart. The shopping cart is held in . . .

(C# ASP.NET Core) Location Tracking Project in ASP.NET Core and .NET MAUI

This ASP.NET Core Project is a proof of concept that allows a user to keep a record of the locations that an android phone travels. The user has to . . .

(ESP32 WROOM) Internet Of Things IOT based Switching

This ASP.NET Core Project is a proof of concept that allows us to control electrical switches in a building, or if it is extended, then it can be us . . .

(C# ASP.NET Core) Realtime Auction with SignalR, WebApi and pure Javascript

This ASP.NET Core WebApi Project doesn't contain any razor pages. It has been written with a few minimal web api - a client browser connects to . . .

(ASPNET Core Exercises) Practice Exercises on CORS in ASPNET Core

This is a collection of exercises on CORS in ASPNET Core. Solutions have been provided for almost all of them.

(ASPNET Core Exercises) Practice Exercises on Web Api in ASPNET Core

This is a collection of exercises on Web Api in ASPNET Core. Solutions have been provided for almost all of them.

(ASPNET Core Exercises) Practice Exercises on Identity in ASPNET Core

This is a collection of exercises on Identity in ASPNET Core. Solutions have been provided for almost all of them.

(C# ASP.NET Core) Cinema Ticket Booking Application

This ASP.NET Core Project has been written with razor pages, SQLite database and Identity. It's an application for online booking of tickets of . . .

(C# ASP.NET Core) Authentication and Login with a USB Doggle

This ASP.NET Core Project explains how authentication can be done with a USB dongle, instead of the usual user-id/password authentication. A user ca . . .

(C# ASP.NET Core) Handwriting to Text with Azure AI Vision API

This ASP.NET Core Project first explains how to create an Azure AI Computer Vision resource, and then use its endpoint and keys to write a C# ASP.NE . . .

How to get keys for OpenAPI and a lot others using Github Models, without the need of paying even a single cent to them.

Github Models is a free service from Github that allows us to obtain API keys for testing LLMs and other AI features without having to sign-up for t . . .

(1) Integrating an MCP Server [plus its AI Tools] into an ASPNET Core Website, and (2) accessing those tools through Visual Studio GitHub Co-Pilot and also (3) programmatically accessing them through a C# console app written with OpenAI SDK

We shall write an MCP Server integrated into an ASP.NET Core website. The MCP server will run on the same IP Address and port as that of the website . . .

The Problem of Multi-tenancy in ASP.NET Core and a Suggested Solution

I explain a situation where multi-tenancy could be implemented by your ASPNET Core App. Also discussed are official solutions, and why I think a sim . . .

(C# ASP.NET Core) [FromHeader] Parameter Binding of a Request Header

Parameters of a web api can be obtained from the values in a request header also. For this an attribute called "FromHeader" is used to dec . . .