dot NET

dot NET

1622685050

Introducing EF Core Compiled Models - Entity Framework Community Standup

EF Core creates an internal model for entity types and their database mappings. This model is typically built once when the application starts. Starting with EF Core 6.0, it is now possible to instead build this model at compile time. This can reduce startup time by up to 67% for large models. Join us for this Community Standup, where the team will introduce compiled models and demo their use.

Community Links: https://www.theurlist.com/efcore-standup-2021-06-02

Featuring: Arthur Vickers (@ajcvickers), Shay Rojansky (@shayrojansky)

Get your questions answered on the Microsoft Q&A for .NET - https://aka.ms/dotnetqa

Learn .NET with free self-guided learning from Microsoft Learn: http://aka.ms/learndotnet

#database #entity-framework #developer

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Introducing EF Core Compiled Models - Entity Framework Community Standup
Hertha  Mayer

Hertha Mayer

1602668764

Announcing Entity Framework Core (EF Core) 5 RC2

Today, the Entity Framework Core team announces the second release candidate (RC2) of EF Core 5.0. This is a feature complete release candidate of EF Core 5.0 and ships with a “go live” license. You are supported using it in production. This is a great opportunity to start using EF Core 5.0 early while there is still time to fix remaining issues. We’re looking for reports of any remaining critical bugs that should be fixed before the final release.

Prerequisites

EF Core 5.0 will not run on .NET Standard 2.0 platforms, including .NET Framework.

How to get EF Core 5.0 Release Candidate 2

EF Core is distributed exclusively as a set of NuGet packages. For example, to add the SQL Server provider to your project, you can use the following command using the dotnet tool:

dotnet add package Microsoft.EntityFrameworkCore.SqlServer --version 5.0.0-rc.2.20475.6

#.net #.net core #.net framework #asp.net #c# #entity framework #announcement #asp.net core #entity framework core

Einar  Hintz

Einar Hintz

1602560783

jQuery Ajax CRUD in ASP.NET Core MVC with Modal Popup

In this article, we’ll discuss how to use jQuery Ajax for ASP.NET Core MVC CRUD Operations using Bootstrap Modal. With jQuery Ajax, we can make HTTP request to controller action methods without reloading the entire page, like a single page application.

To demonstrate CRUD operations – insert, update, delete and retrieve, the project will be dealing with details of a normal bank transaction. GitHub repository for this demo project : https://bit.ly/33KTJAu.

Sub-topics discussed :

  • Form design for insert and update operation.
  • Display forms in modal popup dialog.
  • Form post using jQuery Ajax.
  • Implement MVC CRUD operations with jQuery Ajax.
  • Loading spinner in .NET Core MVC.
  • Prevent direct access to MVC action method.

Create ASP.NET Core MVC Project

In Visual Studio 2019, Go to File > New > Project (Ctrl + Shift + N).

From new project window, Select Asp.Net Core Web Application_._

Image showing how to create ASP.NET Core Web API project in Visual Studio.

Once you provide the project name and location. Select Web Application(Model-View-Controller) and uncheck HTTPS Configuration. Above steps will create a brand new ASP.NET Core MVC project.

Showing project template selection for .NET Core MVC.

Setup a Database

Let’s create a database for this application using Entity Framework Core. For that we’ve to install corresponding NuGet Packages. Right click on project from solution explorer, select Manage NuGet Packages_,_ From browse tab, install following 3 packages.

Showing list of NuGet Packages for Entity Framework Core

Now let’s define DB model class file – /Models/TransactionModel.cs.

public class TransactionModel
{
    [Key]
    public int TransactionId { get; set; }

    [Column(TypeName ="nvarchar(12)")]
    [DisplayName("Account Number")]
    [Required(ErrorMessage ="This Field is required.")]
    [MaxLength(12,ErrorMessage ="Maximum 12 characters only")]
    public string AccountNumber { get; set; }

    [Column(TypeName ="nvarchar(100)")]
    [DisplayName("Beneficiary Name")]
    [Required(ErrorMessage = "This Field is required.")]
    public string BeneficiaryName { get; set; }

    [Column(TypeName ="nvarchar(100)")]
    [DisplayName("Bank Name")]
    [Required(ErrorMessage = "This Field is required.")]
    public string BankName { get; set; }

    [Column(TypeName ="nvarchar(11)")]
    [DisplayName("SWIFT Code")]
    [Required(ErrorMessage = "This Field is required.")]
    [MaxLength(11)]
    public string SWIFTCode { get; set; }

    [DisplayName("Amount")]
    [Required(ErrorMessage = "This Field is required.")]
    public int Amount { get; set; }

    [DisplayFormat(DataFormatString = "{0:MM/dd/yyyy}")]
    public DateTime Date { get; set; }
}

C#Copy

Here we’ve defined model properties for the transaction with proper validation. Now let’s define  DbContextclass for EF Core.

#asp.net core article #asp.net core #add loading spinner in asp.net core #asp.net core crud without reloading #asp.net core jquery ajax form #asp.net core modal dialog #asp.net core mvc crud using jquery ajax #asp.net core mvc with jquery and ajax #asp.net core popup window #bootstrap modal popup in asp.net core mvc. bootstrap modal popup in asp.net core #delete and viewall in asp.net core #jquery ajax - insert #jquery ajax form post #modal popup dialog in asp.net core #no direct access action method #update #validation in modal popup

Announcing Entity Framework Core 6.0 Preview 5: Compiled Models

Today, the Entity Framework Core team announces the fifth preview release of EF Core 6.0. This release includes the first iteration of compiled models. If startup time for your application is important and your EF Core model contains hundreds or thousands of entities, properties, and relationships, this is one release you don’t want to ignore.

TL;DR;

Background

A peek at the query pipeline

Pros and cons

#.net #.net core #asp.net #entity framework #announcement #entity framework core

Deion  Hilpert

Deion Hilpert

1594214520

Entity Framework: .NET Community Standup - EF Core 5.0 Demo Extravaganza

Join members from the .NET teams for our community standup covering great community contributions for Framework, .NET Core, Languages, CLI, MSBuild, and more.

#extravaganza #.net #standup #ef core #framework

Ken  Mueller

Ken Mueller

1595261580

Entity Framework Core in ASP.NET Core 3.1

This article will be covering in detail the implementation of Entity Framework Core in ASP.NET Core Web API. We will learn about entity framework core in details i.e. what, how & why and see how to use it in ASP.NET Core Web API to implement CRUD operations. Though here we will be using entity framework in ASP.NET Core this can be implemented even in .NET Framework for your data persistence. I hope you will join me on this and go through step by step demonstration on implementing entity framework core in ASP.NET Core Web API.

Introduction to Entity Framework Core

ASP.NET Core Entity Framework

Entity Framework has been around since 2008 which has improved over the years. Entity framework core was introduced for .NET Core based applications. It is an open-source object-relational mapper (ORM) built over ADO.NET and an official data access platform from Microsoft. Entity framework core has been rewritten from scratch to make it lightweight, flexible & achieve better performance.

In the absence of an ORM typically lots of code have to be written to perform CRUD operations with the database. using an ORM like entity framework can reduce the number of lines of code to be written for database interactions. Typical ORM will work on classes & database tables of similar structure but entity framework core implements mappings which makes it a lot more flexible i.e. in case table & class does not match then mappings can be exercised to get from objects to tables.

Entity framework core can work with wide variety of databases. Microsoft provides rich providers for SQL Server & SQLite and there are many other third party providers some commercial and some from community.

How does entity framework core works?

How Entity Framework Works

  1. Define domain classes & configure entity framework DbContext API along with mappings to let entity framework work how this class maps to the database schema.
  2. Write LINQ to objects to fetch data from the database.
  3. Based on mappings & database provider configured entity framework will translate queries into SQL that’s understood by the database.
  4. The query is executed and the object is populated with data.
  5. Data in objects can be modified, deleted or new records can be added to the list & once done call DbContext.saveChanges from EF API to save data back to the database.
  6. The entity framework will generate the required SQL statements to save data back to the database.

#programming #.net core #asp.net core 3.1 #entity framework #entity framework core