Skip to main content

.NET6 Razor Pages CRUD Operations With Entity Framework Core

In this article, we will do a small demo of the AspNetCore 6 Razor Pages CRUD operation.

Razor Pages:

Razor Page is a simplified web application model. On comparing with the 'MVC' template, razor pages won't have 'Controller', which means Razor Page is a combination of 'View' and 'Model'. Routing itself is configured within the page or view. A Razor Page mostly contains 2 files like '*.cshtml'(View) and '*.cshtml.cs'(model).

Create A .NET6 Razor Pages Application:

Let's create a .Net6 Razor Page sample application to accomplish our demo. We can use either Visual Studio 2022 or Visual Studio Code(using .NET CLI commands) to create any.Net6 application. For this demo, I'm using the 'Visual Studio Code'(using the .NET CLI command) editor.
CLI command
dotnet new webapp -o Your_Project_Name

Let's explore the project to understand its structure:
(1) Let's understand the initial services registered in 'Program.cs'.
  • Here 'AddRazorPages' service is registered.
(2) Le's understand the initial middleware configured in 'Program.cs'.
  • The 'UseExceptionHandler()' loads a generic exception page for the production environment.
  • The 'UseHsts()' adds the Strict-Transport-Security header.
  • The 'UseHttpsRedirection', HTTP request redirect to HTTPS.
  • The 'UseStaticFiles', load static files like CSS, JS, Images, etc.
  • The 'UseRouting' middleware is where the routing decisions are made.
  • The 'UseAuthorization()' protect against unauthorized or unauthenticated users.
  • The 'MapRazorPages()' enables endpoint routing for the Razor Pages.

SQL Query To Create A Sample Table:

Run the below command to create a sample table.
CREATE TABLE [dbo].[Cake] (
    [Id]          INT             IDENTITY (1, 1) NOT NULL,
    [Name]        VARCHAR (MAX)   NULL,
    [Price]       DECIMAL (18, 2) NULL,
    [Description] VARCHAR (MAX)   NULL
);

Entity Framework Core:

Entity Framework Core is an Object/Relational Mapping(ORM) framework. EF Core makes database communication more fluent and easy. The 'DatabaseContext' class acts as a database from our c# code, it will contain all registered tables as 'DbSet<TEntity>'(TEntity is any POCO class of a table).
In this demo, we are going to implement the 'Code With Existing Database' technique. Creating the classes for an existing database is known as 'Code First With Existing Database'.

Install Entity Framework Core NuGet:

Now install the Entity Framework Core NuGet.
Package Manager Command:
Install-Package Microsoft.EntityFrameworkCore -Version 6.0.1

Package Manager Command:
dotnet add package Microsoft.EntityFrameworkCore --version 6.0.1

Now install SQLServer that is Entity Framework Core dependant library.
Package Manager Command:
Install-Package Microsoft.EntityFrameworkCore.SqlServer -Version 6.0.1

Package Manager Command:
dotnet add package Microsoft.EntityFrameworkCore.SqlServer --version 6.0.1

Setup Entity Framework Core DatabaseContext:

Let's create a class that represents our table. So let's create a folder like 'Data' and a subfolder like 'Entities' and then add a class like 'Cake.cs'.
Data/Entities/Cake.cs:
namespace Dot6.Razor.Crud.Demo.Data.Entities;

public class Cake
{
    public int Id { get; set; }
    public string Name { get; set; }
    public decimal Price { get; set; }
    public string Description { get; set; }
}
To manage or control all the table classes we have to create DatabaseContext class. So let's create our context class like 'MyWorldDbContext.cs' in the 'Data' folder.
Data/MyWorldDbContext.cs:
using Dot6.Razor.Crud.Demo.Data.Entities;
using Microsoft.EntityFrameworkCore;

namespace Dot6.Razor.Crud.Demo.Data;

public class MyWorldDbContext : DbContext
{
    public MyWorldDbContext(DbContextOptions<MyWorldDbContext> options) : base(options)
    {
 
    }
    public DbSet<Cake> Cake { get; set; }
}
  • (Line: 6) The 'Microsoft.EntityFrameworkCore.DbContext' needs to be inherited by our 'MyWorldDbContext' to act as a Database context class.
  • (Line: 8) The 'Microsoft.EntityFrameworkCore.DbContextOptions' is instance of options that we are going to register in 'Program.cs' like 'ConnectionString', 'DatabaseProvider', etc.
  • (Line: 12) All our table classes must be registered inside of our Database context class with 'DbSet<T>' so that the entity framework core can communicate with the tables of the database.
In 'appsettings.Development.json' add your database connection string.
appsettings.Development.json:
"ConnectionStrings":{
    "MyWorldDbConnection":"your_connection"
}
Register the Database Context service in the 'Program.cs' file for dependency injection.
Program.cs:
builder.Services.AddDbContext<MyWorldDbContext>(options =>
{
	options.UseSqlServer(builder.Configuration.GetConnectionString("MyWorldDbConnection"));
});

Read Operation:

In 'Pages' folder create a new folder like 'Cakes', inside of it let's Razor Page for our read operation like 'Index.csthml'(View file), 'Index.cshtml.cs'(Model file).
Pages/Cakes/Index.cshtml.cs:
using Dot6.Razor.Crud.Demo.Data;
using Dot6.Razor.Crud.Demo.Data.Entities;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using Microsoft.EntityFrameworkCore;
namespace Dot6.Razor.Crud.Demo.Pages.Cakes;

public class IndexModel : PageModel
{
    private readonly MyWorldDbContext _myWorldDbContext;
    public IndexModel(MyWorldDbContext myWorldDbContext)
    {
        _myWorldDbContext = myWorldDbContext;
    }

    public List<Cake> AllCakes = new List<Cake>();

    public async Task<IActionResult> OnGetAsync()
    {
        AllCakes = await _myWorldDbContext.Cake.ToListAsync();
        return Page();
    }
}
  • (Line: 8) To make our c# class as Razor Page model it needs to inherit the 'Microsoft.AspNetCore.Mvc.RazorPages.PageModel'.
  • (Line: 11) Injecting Database context into our Razor Page model.
  • (Line: 16) Declared a variable of a type that is collection 'Cake' to hold the data from the database and then bind the data to the UI.
  • (Line: 18-22) The default method executed for the razor page HTTP Get request is 'OnGet' or 'OnGetAsync'. It is always ideal to have one method for each HTTP verbs like 'GET', 'POST'. There is an option to customize the name of the HTTP GET request method then it should be like 'OnGet{YourCustomName}' or 'OnGet{YourCustomName}Async', but if we customize the method name then we have to specify the custom name as value to the query parameter 'handler'. So don't give the custom name unless it is required. Inside of Our 'OnGetAsync' method we have implemented our logic to fetch the data from the database.
Pages/Cakes/Index.cshtml:
@page "/cake/home"
@using Dot6.Razor.Crud.Demo.Data.Entities
@model Dot6.Razor.Crud.Demo.Pages.Cakes.IndexModel

<div class="container">
    <div class="row">
        @foreach (var item in Model.AllCakes)
        {
            <div class="col-md-3 m-3">
                <div class="card" style="width: 18rem;">
                    <div class="card-body">
                        <h5 class="card-title">@item.Name</h5>
                        <h6 class="card-subtitle mb-2 text-muted">@item.Price $</h6>
                        <p class="card-text">@item.Description</p>
                    </div>
                </div>
            </div>
        }
    </div>
</div>
  • (Line: 1) Using the '@page' directive we can define route to our Razor Page.
  • (Line: 3) Define the model which is the class name of the 'Index.cshtml.cs' file.
  • (Line: 7-18) Loop the data to bind to UI.
Now run the application and then navigate to route "/cake/home".

Create Operation:

In the 'Pages/Cakes' folder add a new razor page for our create operation like 'Create.cshtml'(View file), 'Create.cshtml.cs'(Model file).

Let's create a view model for storing the form data(For storing form data if we use 'Cake.cs' table entity it will work but there may be changes of overposting data so to avoid it, recommend using View Model ). So let's create folder 'Vms' inside of it add 'CakeVm.cs'.
Vms/CakeVm.cs:
namespace Dot6.Razor.Crud.Demo.Vms;

public class CakeVm
{
    public int Id { get; set; }
    public string Name { get; set; }
    public decimal Price { get; set; }
    public string Description { get; set; }
}
Pages/Cakes/Create.cshtml.cs:
using Dot6.Razor.Crud.Demo.Data;
using Dot6.Razor.Crud.Demo.Data.Entities;
using Dot6.Razor.Crud.Demo.Vms;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;

namespace Dot6.Razor.Crud.Demo.Pages.Cakes;

public class CreateModel : PageModel
{
    private readonly MyWorldDbContext _myWorldDbContext;
    public CreateModel(MyWorldDbContext myWorldDbContext)
    {
        _myWorldDbContext = myWorldDbContext;
    }
    [BindProperty]
    public CakeVm CakeVm { get; set; }
    public IActionResult OnGet()
    {
        return Page();
    }

    public async Task<IActionResult> OnPostAsync()
    {
        var entry = _myWorldDbContext.Add(new Cake());
        entry.CurrentValues.SetValues(CakeVm);
        await _myWorldDbContext.SaveChangesAsync();
        return Redirect("home");
    }
}
  • (Line: 17) The 'CakeVm' will be used to store the form data. By decorating the property with the 'BindProperty' attribute we are enhancing capability like storing the form data onto it directly without any explicit mapping.
  • (Line: 18-21) The 'OnGet()' method loads the create a form to us.
  • (Line: 23-29) The 'OnPostAsync' method gets invoked for the post request.
  • (Line: 25) Attaching the empty 'Cake' instance to Database Context, now that state is 'Added' means read to save to database.
  • (Line: 26) Updating the value of 'Cake' instance which is added to Database Context at Line:25. So this approach we no need to map the properties explicitly between the 'Cake' and 'CakeVm' objects.
  • (Line: 27)Saving changes to the database by calling the 'SaveChangeAsync()' method.
  • (Line: 28) Redirecting back to the '/cake/home' page.
Pages/Cakes/Create.cshml:
@page "/cake/create"
@model Dot6.Razor.Crud.Demo.Pages.Cakes.CreateModel

<div class="container">
    <div class="row ">
        <div class="col-md-6 offset-md-3">
            <form method="POST">
                <legend>Create A New Cake</legend>
                <div class="mb-3">
                    <label for="txtName" class="form-label">Name</label>
                    <input asp-for="CakeVm.Name" type="text" class="form-control" id="txtName" />
                </div>
                <div class="mb-3">
                    <label for="txtCost" class="form-label">Cost</label>
                    <input asp-for="CakeVm.Price" type="text" class="form-control" id="txtCost" />
                </div>
                <div class="mb-3">
                    <label for="txtDescription" class="form-label">Cost</label>
                    <textarea asp-for="CakeVm.Description" type="text" class="form-control"
                        id="txtDescription"></textarea>
                </div>
                <button type="submit" class="btn btn-primary">Submit</button>
            </form>
        </div>

    </div>

</div>
  • (Line: 1) Defined Razor Page route.
  • (Line: 2) Register the Model.
  • (Line: 4-28) Rendering a form to create a new record. Here each input HTML field is bound with our object that is 'CakeVm' with help of the 'asp-for' tag helper. So any data entered to the form and on submitting the form then the form data values directly stored into the 'CakeVm'(because it is decorated with 'BindProperty' attribute).
Let's add a button in the 'Index.csthml' so on the click it navigates us to our create page.
Pages/Cakes/Index.cshtml:
<!-- Code hidden for display purspose -->
<div class="container">
    <div class="row">
        <div class="col-md-4 offset-md-4">
            <a asp-page="./create" class="btn btn-primary">Create New Cake</a>
        </div>
    </div>
    <div class="row">
        @foreach (var item in Model.AllCakes)
        {
          
        }
    </div>
</div>
step1:
step2:
step3:

Update Operation:

In the 'Pages/Cakes' add a new Razor Page for update operation like 'Edit.cshtml.cs'(Model file), 'Edit.cshtml'(View file).
Pages/Cakes/Edit.cshtml.cs:
using Dot6.Razor.Crud.Demo.Data;
using Dot6.Razor.Crud.Demo.Data.Entities;
using Dot6.Razor.Crud.Demo.Vms;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using Microsoft.EntityFrameworkCore;

namespace Dot6.Razor.Crud.Demo.Pages.Cakes;

public class EditModel : PageModel
{
    private MyWorldDbContext _myWorldDbContext;
    public EditModel(MyWorldDbContext myWorldDbContext)
    {
        _myWorldDbContext = myWorldDbContext;
    }

    [BindProperty]
    public CakeVm? CakeVm { get; set; }

    public async Task<IActionResult> OnGetAsync(int id)
    {
        CakeVm = await _myWorldDbContext.Cake
                .Where(_ => _.Id == id)
                .Select(_ =>
                new CakeVm
                {
                    Description = _.Description,
                    Id = _.Id,
                    Name = _.Name,
                    Price = _.Price
                }).FirstOrDefaultAsync();

        if (CakeVm == null)
        {
            return NotFound();
        }
        return Page();
    }

    public async Task<IActionResult> OnPostAsync(int id)
    {
        var cakeToUpdate = await _myWorldDbContext.Cake.FindAsync(id);

        if (cakeToUpdate == null)
        {
            return NotFound();
        }

        if (await TryUpdateModelAsync<Cake>(
            cakeToUpdate,
            "CakeVm",
            c => c.Name, c => c.Description, c => c.Price
        ))
        {
            await _myWorldDbContext.SaveChangesAsync();
            return Redirect("home");
        }

        return Page();
    }
}
  • (Line: 18-19) The 'CakeVm' property captures form data on page post, which is possible because of attributes 'BindProperty'.
  • (Line: 21-39) The 'OnGetAsync()' to load the form with data that needs to be updated.
  • (Line: 23-32) Fetch the record by 'id'(query parameter) and assign the data to our 'CakeVm' property.
  • (Line: 41-61) The 'OnPostAsync()' gets invoked for the Post request.
  • (Line: 43) Fetch the data from the database that needs to be updated.
  • (Line: 50-58) The 'TryUpdateModelAsync()' method helps to copy the data from the 'CakeVm' to 'cakeToUpdate'(variable of type Cake). Only specified props will be copied to the destination object. On invoking the 'SaveChangesAsyn()' updates the data to the database.
Pages/Cakes/Edit.cshtml:
@page "/cake/edit"
@model Dot6.Razor.Crud.Demo.Pages.Cakes.EditModel

<div class="container">
    <div class="row ">
        <div class="col-md-6 offset-md-3">
            <form method="POST">
                <legend>Update A New Cake</legend>
                <div class="mb-3">
                    <label for="txtName" class="form-label">Name</label>
                    <input asp-for="CakeVm.Name" type="text" class="form-control" id="txtName" />
                </div>
                <div class="mb-3">
                    <label for="txtCost" class="form-label">Cost</label>
                    <input asp-for="CakeVm.Price" type="text" class="form-control" id="txtCost" />
                </div>
                <div class="mb-3">
                    <label for="txtDescription" class="form-label">Cost</label>
                    <textarea asp-for="CakeVm.Description" type="text" class="form-control"
                        id="txtDescription"></textarea>
                </div>
                <button type="submit" class="btn btn-primary">Submit</button>
            </form>
        </div>

    </div>

</div>
  • (Line: 1) Defined route for our Razor Page.
  • (Line: 2) Defined the Model for our Razor Page.
  • (Line: 4-28)  Render the edit form. Each field binding is enabled by the 'asp-for' razor tag.
In 'Index.cshtml' add the 'Edit' button to our records.
Pages/Cakes/Index.cshtml:
<!-- code hidden for display purpose -->
<div class="card" style="width: 18rem;">
	<div class="card-body">
		<h5 class="card-title">@item.Name</h5>
		<h6 class="card-subtitle mb-2 text-muted">@item.Price $</h6>
		<p class="card-text">@item.Description</p>
		<a asp-page="./edit" asp-route-id="@item.Id" class="btn btn-primary">Edit</a>
	</div>
</div>
  • (Line: 7) Added anchor tag as 'Edit' button, the route defined at 'asp-page' helper tag, and then query parameter defined at 'asp-route-id' tag helper.


Delete Operation:

In the 'Pages/Cakes' folder add a new Razor Page for delete operation like 'Delete.cshtml'(Model file), 'Delete.cshtml.cs'(View file).
Pages/Cakes/Delete.cshtml.cs:
using Dot6.Razor.Crud.Demo.Data;
using Dot6.Razor.Crud.Demo.Vms;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using Microsoft.EntityFrameworkCore;

namespace Dot6.Razor.Crud.Demo.Pages.Cakes;

public class DeleteModel : PageModel
{
    private readonly MyWorldDbContext _myWorldDbContext;
    public DeleteModel(MyWorldDbContext myWorldDbContext)
    {
        _myWorldDbContext = myWorldDbContext;
    }

    public string ErrorMessage { get; set; }
    public CakeVm? CakeVm { get; set; }
    public async Task<IActionResult> OnGetAsync(int id, bool? saveChangesError)
    {
        CakeVm = await _myWorldDbContext.Cake
                .Where(_ => _.Id == id)
                .Select(_ =>
                new CakeVm
                {
                    Description = _.Description,
                    Id = _.Id,
                    Name = _.Name,
                    Price = _.Price
                }).FirstOrDefaultAsync();

        if (CakeVm == null)
        {
            return NotFound();
        }
        if (saveChangesError ?? false)
        {
            ErrorMessage = $"Error to delete the record id - {id}";
        }
        return Page();
    }

    public async Task<IActionResult> OnPostAsync(int id)
    {
        var recordToDelete = await _myWorldDbContext.Cake.FindAsync(id);

        if (recordToDelete == null)
        {
            return Page();
        }

        try
        {
            _myWorldDbContext.Cake.Remove(recordToDelete);
            await _myWorldDbContext.SaveChangesAsync();
            return Redirect("./home");
        }
        catch
        {
            return Redirect($"./delete?id={id}&saveChangesError=true");
        }
    }
}
  • (Line: 17) The 'ErrorMessage' property display the delete error message.
  • (Line: 18) The 'CakVm' displays the data on the delete confirmation page.
  • (Line: 19-41) The 'OnGetAsync' method to loads the data to display for the delete confirmation page.
  • (Line: 20-31) Load the record to delete from the database by 'id'.
  • (Line: 36-39) Based on the 'saveChangesError' boolean value populating the error message. One thing to remember is 'true' value will be assigned to 'saveChangeError' only from the 'OnPostAsync' method when an error occurs on deleting the record.
  • (Line: 43-62) The 'OnPostAsync' method gets invoked on confirm delete post request.
  • (Line: 45) Fetching the record from the database by 'id'.
  • (Line: 54-55) Deleting the record from the database.
  • (Line: 56) After successful delete navigating back to the home page.
  • (Line: 60) An error occurs on deleting the record then we will redirect to the same 'Delete' page by assigning the 'saveCahgesError' query parameter value 'true' for displaying the error message.
Pages/Cakes/Delete.cshtml:
@page "/delete"
@model Dot6.Razor.Crud.Demo.Pages.Cakes.DeleteModel

<div class="container">
    <div class="row">
        <p class="text-danger">@Model.ErrorMessage</p>
    </div>
    <div class="row">
        <div class="col-md-3 m-3">
            <legend>Confirm To Delete</legend>
            <div class="card" style="width: 18rem;">
                <div class="card-body">
                    <h5 class="card-title">@Model.CakeVm.Name</h5>
                    <h6 class="card-subtitle mb-2 text-muted">@Model.CakeVm.Price $</h6>
                    <p class="card-text">@Model.CakeVm.Description</p>
                    <div>
                        <form method="post">
                            <button type="submit" class="btn btn-danger">Confirm Delete</button>
                        </form>
                    </div>
                </div>
            </div>
        </div>
    </div>
</div>
Now in 'index.cshtml' add the 'Delete' button.
Pages/Cakes/Index.cshtml:
<a asp-page="./delete" asp-route-id="@item.Id" class="btn btn-danger">Delete</a>

Support Me!
Buy Me A Coffee PayPal Me

Video Session:

Wrapping Up:

Hopefully, I think this article delivered some useful information on .NET6 Razor Pages CRUD Operation. using I love to have your feedback, suggestions, and better techniques in the comment section below.

Refer:

Follow Me:

Comments

  1. Thanks you very much, for so nice and clear presentation, Best ever seen in Web or youtube. This eases my brain headages.

    ReplyDelete
  2. Thanks. This was as clear and helpful as it can be.

    ReplyDelete

Post a Comment

Popular posts from this blog

.NET6 Web API CRUD Operation With Entity Framework Core

In this article, we are going to do a small demo on AspNetCore 6 Web API CRUD operations. What Is Web API: Web API is a framework for building HTTP services that can be accessed from any client like browser, mobile devices, desktop apps. In simple terminology API(Application Programming Interface) means an interface module that contains a programming function that can be requested via HTTP calls to save or fetch the data for their respective clients. Some of the key characteristics of API: Supports HTTP verbs like 'GET', 'POST', 'PUT', 'DELETE', etc. Supports default responses like 'XML' and 'JSON'. Also can define custom responses. Supports self-hosting or individual hosting, so that all different kinds of apps can consume it. Authentication and Authorization are easy to implement. The ideal platform to build REST full services. Create A .NET6 Web API Application: Let's create a .Net6 Web API sample application to accomplish our

Usage Of CancellationToken In Asp.Net Core Applications

When To Use CancellationToken?: In a web application request abortion or orphan, requests are quite common. On users disconnected by network interruption or navigating between multiple pages before proper response or closing of the browser, tabs make the request aborted or orphan. An orphan request can't deliver a response to the client, but it will execute all steps(like database calls, HTTP calls, etc) at the server. Complete execution of an orphan request at the server might not be a problem generally if at all requests need to work on time taking a job at the server in those cases might be nice to terminate the execution immediately. So CancellationToken can be used to terminate a request execution at the server immediately once the request is aborted or orphan. Here we are going to see some sample code snippets about implementing a CancellationToken for Entity FrameworkCore, Dapper ORM, and HttpClient calls in Asp.NetCore MVC application. Note: The sample codes I will show in

A Small Guide On NestJS Queues

NestJS Application Queues helps to deal with application scaling and performance challenges. When To Use Queues?: API request that mostly involves in time taking operations like CPU bound operation, doing them synchronously which will result in thread blocking. So to avoid these issues, it is an appropriate way to make the CPU-bound operation separate background job.  In nestjs one of the best solutions for these kinds of tasks is to implement the Queues. For queueing mechanism in the nestjs application most recommended library is '@nestjs/bull'(Bull is nodejs queue library). The 'Bull' depends on Redis cache for data storage like a job. So in this queueing technique, we will create services like 'Producer' and 'Consumer'. The 'Producer' is used to push our jobs into the Redis stores. The consumer will read those jobs(eg: CPU Bound Operations) and process them. So by using this queues technique user requests processed very fastly because actually

Blazor WebAssembly Custom Authentication From Scratch

In this article, we are going to explore and implement custom authentication from the scratch. In this sample, we will use JWT authentication for user authentication. Main Building Blocks Of Blazor WebAssembly Authentication: The core concepts of blazor webassembly authentication are: AuthenticationStateProvider Service AuthorizeView Component Task<AuthenticationState> Cascading Property CascadingAuthenticationState Component AuthorizeRouteView Component AuthenticationStateProvider Service - this provider holds the authentication information about the login user. The 'GetAuthenticationStateAsync()' method in the Authentication state provider returns user AuthenticationState. The 'NotifyAuthenticationStateChaged()' to notify the latest user information within the components which using this AuthenticationStateProvider. AuthorizeView Component - displays different content depending on the user authorization state. This component uses the AuthenticationStateProvider

How Response Caching Works In Asp.Net Core

What Is Response Caching?: Response Caching means storing of response output and using stored response until it's under it's the expiration time. Response Caching approach cuts down some requests to the server and also reduces some workload on the server. Response Caching Headers: Response Caching carried out by the few Http based headers information between client and server. Main Response Caching Headers are like below Cache-Control Pragma Vary Cache-Control Header: Cache-Control header is the main header type for the response caching. Cache-Control will be decorated with the following directives. public - this directive indicates any cache may store the response. private - this directive allows to store response with respect to a single user and can't be stored with shared cache stores. max-age - this directive represents a time to hold a response in the cache. no-cache - this directive represents no storing of response and always fetch the fr

Part-1 Angular JWT Authentication Using HTTP Only Cookie[Angular V13]

In this article, we are going to implement a sample angular application authentication using HTTP only cookie that contains a JWT token. HTTP Only JWT Cookie: In a SPA(Single Page Application) Authentication JWT token either can be stored in browser 'LocalStorage' or in 'Cookie'. Storing JWT token inside of the cookie then the cookie should be HTTP Only. The HTTP-Only cookie nature is that it will be only accessible by the server application. Client apps like javascript-based apps can't access the HTTP-Only cookie. So if we use authentication with HTTP only JWT cookie then we no need to implement custom logic like adding authorization header or storing token data, etc at our client application. Because once the user authenticated cookie will be automatically sent to the server by the browser on every API call. Authentication API: To implement JWT cookie authentication we need to set up an API. For that, I had created a mock authentication API(Using the NestJS Se

Unit Testing Asp.NetCore Web API Using xUnit[.NET6]

In this article, we are going to write test cases to an Asp.NetCore Web API(.NET6) application using the xUnit. xUnit For .NET: The xUnit for .Net is a free, open-source, community-focused unit testing tool for .NET applications. By default .Net also provides a xUnit project template to implement test cases. Unit test cases build upon the 'AAA' formula that means 'Arrange', 'Act' and 'Assert' Arrange - Declaring variables, objects, instantiating mocks, etc. Act - Calling or invoking the method that needs to be tested. Assert - The assert ensures that code behaves as expected means yielding expected output. Create An API And Unit Test Projects: Let's create a .Net6 Web API and xUnit sample applications to accomplish our demo. We can use either Visual Studio 2022 or Visual Studio Code(using .NET CLI commands) to create any.Net6 application. For this demo, I'm using the 'Visual Studio Code'(using the .NET CLI command) editor. Create a fo

Different HttpClient Techniques To Consume API Calls In Minimal API[.NET6]

In this article, we are going to implement different HttpClient techniques to consume API calls in minimal API. The different HttpClient techniques that we are going to explore are like: Register HttpClient Object Explicitly In DI(Dependency Injection Service) Named Client Type Client HttpRequestMessage Object Create A .NET6 Minimal API Project: Let's create a .Net6 Minimal API sample project to accomplish our demo. We can use either Visual Studio 2022 or Visual Studio Code(using .NET CLI commands) to create any.Net6 application. For this demo, I'm using the 'Visual Studio Code'(using the .NET CLI command) editor. CLI command For Minimal API Project dotnet new webapi -minimal -o Your_Project_Name Create A Third Party API Response Model: Here I'm going to use a free third-party rest API that is "https://jsonplaceholder.typicode.com/posts". So to receive the response let's create a response model like 'Post.cs'. Program.cs:(Add Post.cs c

.Net5 Web API Managing Files Using Azure Blob Storage

In this article, we are going to understand the different file operations like uploading, reading, downloading, and deleting in .Net5 Web API application using Azure Blob Storage. Azure Blob Storage: Azure blob storage is Microsoft cloud storage. Blob storage can store a massive amount of file data as unstructured data. The unstructured data means not belong to any specific type, which means text or binary data. So something like images or pdf or videos to store in the cloud, then the most recommended is to use the blob store. The key component to creating azure blob storage resource: Storage Account:- A Storage account gives a unique namespace in Azure for all the data we will save. Every object that we store in Azure Storage has an address. The address is nothing but the unique name of our Storage Account name. The combination of the account name and the Azure Storage blob endpoint forms the base address for each object in our Storage account. For example, if our Storage Account is n

.Net5 Web API Redis Cache Using StackExchange.Redis.Extensions.AspNetCore Library

In this article, we are going to explore the integration of Redis cache in .Net5 Web API application using the 'StackExchange.Redis.Exntensions' library. Note:- Microsoft has introduced an 'IDistributedCache' interface in dotnet core which supports different cache stores like In-Memory, Redis, NCache, etc. It is simple and easy to work with  'IDistributedCache', for the Redis store with limited features but if we want more features of the Redis store we can choose to use 'StackExchange.Redis.Extensions'.  Click here for Redis Cache Integration Using IDistributedCache Interface . Overview On StackExchange.Redis.Extnesions Library: The 'StackExchange.Redis.Extension' library extended from the main library 'StackExchange.Redis'. Some of the key features of this library like: Default serialization and deserialization. Easy to save and fetch complex objects. Search key. Multiple Database Access Setup Redis Docker Instance: For this sampl