امیر قراجه داغی امیر قراجه داغی
اشتراک‌ها
آموزش ساخت اپلیکیشن های تجاری با WPF, MVVM, and Entity Framework Code First

آموزش عالی  برای کسانی که می‌خواهند WPF و الگوی MVVM و CODE FIRST رو باهم یاد بگیرند :

At the core of developing a data-driven WPF application is a thorough knowledge of how to use the MVVM Pattern and Entity Framework. In this course, Building an Enterprise App with WPF, MVVM, and Entity Framework Code First, you will learn the skills you need to create high-quality enterprise applications with WPF. First, you'll learn about typical scenarios like communicating between different ViewModels, detecting model changes, and handling many-to-many relations. Next, you'll learn all about creating a tabbed user interface. Finally, you'll explore implementing optimistic concurrency and styling your application. When you're finished with this course, you will have a deep understanding of WPF, MVVM, and Entity Framework that will help you immensely as you move forward and create your own data-driven enterprise application

 
آموزش ساخت اپلیکیشن های تجاری با WPF, MVVM, and Entity Framework Code First
‫۵ سال و ۹ ماه قبل، یکشنبه ۲۳ دی ۱۳۹۷، ساعت ۲۰:۳۸
سالار ربال سالار ربال
اشتراک‌ها
مدیریت مباحث همزمانی مرتبط با یک Rich Domain Model با استفاده از EFCore و الگوی Aggregate

In summary, the most important issues here are:

  • The Aggregate’s main task is to protect invariants (business rules, the boundary of immediate consistency)
  • In a multi-threaded environment, when multiple threads are running simultaneously on the same Aggregate, a business rule may be broken
  • A way to solve concurrency conflicts is to use Pessimistic or Optimistic concurrency techniques
  • Pessimistic Concurrency involves the use of a database transaction and a locking mechanism. In this way, requests are processed one after the other, so basically concurrency is lost and it can lead to deadlocks.
  • Optimistic Concurrency technique is based on versioning database records and checking whether the previously loaded version has not been changed by another thread.
  • Entity Framework Core supports Optimistic Concurrency. Pessimistic Concurrency is not supported
  • The Aggregate must always be treated and versioned as a single unit
  • Domain events are an indicator, that state was changed so Aggregate version should be changed as well  
public class AggregateRootBase : Entity, IAggregateRoot
{
    private int _versionId;

    public void IncreaseVersion()
    {
        _versionId++;
    }
}
internal sealed class OrderEntityTypeConfiguration : IEntityTypeConfiguration<Order>
{
    public void Configure(EntityTypeBuilder<Order> builder)
    {
        builder.Property("_versionId").HasColumnName("VersionId").IsConcurrencyToken();
 
        //...
    }
}
var order = await _ordersContext.Orders.FindAsync(orderId);
order.AddOrderLine(request.ProductCode); 
var domainEvents = DomainEventsHelper.GetAllDomainEvents(order);
if (domainEvents.Any())
{
    order.IncreaseVersion();
}
await _ordersContext.SaveChangesAsync();


مدیریت مباحث همزمانی مرتبط با یک Rich Domain Model با استفاده از EFCore و الگوی Aggregate
‫۴ سال و ۴ ماه قبل، شنبه ۲۷ اردیبهشت ۱۳۹۹، ساعت ۰۴:۲۳
وحید نصیری وحید نصیری
اشتراک‌ها
امکان استفاده از کامپوننت‌های Blazor در برنامه‌های SPA مانند React و Angular در دات نت 6

Once created, these custom elements -- a custom counter, for example -- can also be used in other single-page application (SPA) web frameworks such as React and Angular. A sample project, aptly titled Blazor Custom Elements, shows how to do just that, providing examples about how to work with those frameworks and the client-side Blazor WebAssembly component as well as Blazor Server.  

امکان استفاده از کامپوننت‌های Blazor در برنامه‌های SPA مانند React و Angular در دات نت 6
‫۳ سال قبل، جمعه ۲۶ شهریور ۱۴۰۰، ساعت ۱۱:۴۵
رامین علیرضایی رامین علیرضایی
اشتراک‌ها
مجموعه UI قدرتمند برای HTML5 و jQuery
jQWidgets comes with an amazing collection of help tutorials and examples built to help you using our UI Tools with other Frameworks and CMS. On our Documentation page, you will find how to use jQWidgets with PHP, ASP .NET, ASP .NET MVC, Joomla, WordPress, Knockout, Breeze, RequireJS, Twitter Bootstrap, Hot Towel and more
مجموعه UI قدرتمند برای HTML5 و jQuery
‫۱۰ سال و ۶ ماه قبل، جمعه ۲۹ فروردین ۱۳۹۳، ساعت ۲۲:۰۲
وحید نصیری وحید نصیری
اشتراک‌ها
Joe Albahari؛ آنچه که از 20 سال برنامه نویسی #C آموختم

What I've learned from 20 years of programming in C# with Joe Albahari with Q&A session - YouTube
In April 2001, I wrote and published my first C# program. Join me in discovering the most valuable principles that I've learned in the 20 years of C# programming that followed. We'll cover a range of topics, with plenty of samples and useful code that you can take away.

00:00 - Introduction
01:04 - Types
18:55 - Functional Programming
19:43 - What Defines Functional Programming?
33:26 - Lazy Values
36:20 - Cache a function - Memoizer
41:49 - Using a Closure instead of a Class
43:24 - Memoizer example
45:07 - Asynchronous Programming
47:58 - How do we abstract around Futures?
53:54 - Asynchronous locking
58:04 - Implementing A-synch lock with Semaphore
01:09:48 - Await inside a UI method vs a library method
01:18:04 - Using Exceptions
01:36:18 - Implementing a Retry
01:39:02 - IEither interface
01:39:58 - Downloading samples on LINQPad
01:40:27 - Q&A Session 

Joe Albahari؛ آنچه که از 20 سال برنامه نویسی #C آموختم
‫۳ سال و ۴ ماه قبل، چهارشنبه ۵ خرداد ۱۴۰۰، ساعت ۱۲:۵۶
وحید نصیری وحید نصیری
اشتراک‌ها
مایکروسافت در حال تهیه‌ی مجموعه‌ای از کامپوننت‌های Blazor است

The Microsoft.Fast.Components.FluentUI package provides a lightweight set of Blazor component wrappers around Microsoft's official FluentUI Web Components. The FluentUI Web Components are built on FAST and work in every major browser. To get up and running with Microsoft.Fast.Components.FluentUI see the Getting Started section below. 

مایکروسافت در حال تهیه‌ی مجموعه‌ای از کامپوننت‌های Blazor است
‫۳ سال و ۴ ماه قبل، سه‌شنبه ۱۱ خرداد ۱۴۰۰، ساعت ۱۵:۴۲
وحید محمدطاهری وحید محمدطاهری
اشتراک‌ها
سری آموزش Visual Studio Toolbox: Design Patterns

This is the first of an eight part series where I am joined by Phil Japikse to discuss design patterns. A design pattern is a best practice you can use in your code to solve a common problem.  In this episode, Phil demonstrates the Command and Memento patterns. 

Episodes in this series:

  • Command/Memento patterns (this episode)
  • Strategy pattern
  • Template Method pattern (to be published 7/20)
  • Observer/Publish-Subscribe patterns (to be published 7/25)
  • Singleton pattern (to be published 8/8)
  • Factory patterns (to be published 8/10)
  • Adapter/Facade patterns (to be published 8/15)
  • Decorator pattern (to be published 8/17) 
سری آموزش Visual Studio Toolbox: Design Patterns
‫۷ سال و ۳ ماه قبل، شنبه ۳۱ تیر ۱۳۹۶، ساعت ۰۳:۴۰
سعد سعد
اشتراک‌ها
پیاده سازی AutoPostBack در ASP.NET Core

Those of you who worked with ASP.NET web forms will recollect that certain server controls such as DropDownList have a property called AutoPostBack. This property when set to true automatically submits the form to the server whenever the selection changes and raises some server side event. In modern web development people prefer to use Ajax over AutoPostBack but at times AutoPostBack is what you might need. To that end this article shows how AutoPostBack can be implemented in ASP.NET Core applications. 

پیاده سازی AutoPostBack در ASP.NET Core
‫۷ سال و ۲ ماه قبل، دوشنبه ۱۶ مرداد ۱۳۹۶، ساعت ۱۳:۳۷