using System.ComponentModel;
using System.ComponentModel.DataAnnotations;

namespace Mvc4TwitterBootStrapTest.Models
{
    public class User
    {
        [DisplayName("نام")]
        [Required(ErrorMessage="لطفا نام را تکمیل کنید")]
        public string Name { set; get; }

        [DisplayName("نام خانوادگی")]
        [Required(ErrorMessage = "لطفا نام خانوادگی را تکمیل کنید")]
        public string LastName { set; get; }
    }
}

using System.Web.Mvc;
using Mvc4TwitterBootStrapTest.Models;

namespace Mvc4TwitterBootStrapTest.Controllers
{
    public class HomeController : Controller
    {
        [HttpGet]
        public ActionResult Index()
        {
            return View();
        }

        [HttpPost]
        public ActionResult Index(User user)
        {
            if (this.ModelState.IsValid)
            {
                if (user.Name != "Vahid")
                {
                    this.ModelState.AddModelError("", "لطفا مشکلات را برطرف کنید!");
                    this.ModelState.AddModelError("Name", "نام فقط باید وحید باشد!");
                    return View(user);
                }
                // todo: save ...
                return RedirectToAction("Index");
            }
            return View(user);
        }
    }
}

@model Mvc4TwitterBootStrapTest.Models.User
@{
    ViewBag.Title = "تعریف کاربر";
}
@using (Html.BeginForm("Index", "Home", FormMethod.Post, new { @class = "form-horizontal" }))
{
    @Html.ValidationSummary(true, null, new { @class = "alert alert-error alert-block" })

    <fieldset>
        <legend>تعریف کاربر</legend>
        <div class="control-group">
            @Html.LabelFor(x => x.Name, new { @class = "control-label" })
            <div class="controls">
                @Html.TextBoxFor(x => x.Name)
                @Html.ValidationMessageFor(x => x.Name, null, new { @class = "help-inline" })
            </div>
        </div>
        <div class="control-group">
            @Html.LabelFor(x => x.LastName, new { @class = "control-label" })
            <div class="controls">
                @Html.TextBoxFor(x => x.LastName)
                @Html.ValidationMessageFor(x => x.LastName, null, new { @class = "help-inline" })
            </div>
        </div>
        <div class="form-actions">
            <button type="submit" class="btn btn-primary">
                ارسال</button>
        </div>
    </fieldset>
}

@section javaScript
{
    <script type="text/javascript">
        $.validator.setDefaults({
            highlight: function (element, errorClass, validClass) {
                if (element.type === 'radio') {
                    this.findByName(element.name).addClass(errorClass).removeClass(validClass);
                } else {
                    $(element).addClass(errorClass).removeClass(validClass);
                    $(element).closest('.control-group').removeClass('success').addClass('error');
                }
                $(element).trigger('highlated');
            },
            unhighlight: function (element, errorClass, validClass) {
                if (element.type === 'radio') {
                    this.findByName(element.name).removeClass(errorClass).addClass(validClass);
                } else {
                    $(element).removeClass(errorClass).addClass(validClass);
                    $(element).closest('.control-group').removeClass('error').addClass('success');
                }
                $(element).trigger('unhighlated');
            }
        });

        $(function () {
            $('form').each(function () {
                $(this).find('div.control-group').each(function () {
                    if ($(this).find('span.field-validation-error').length > 0) {
                        $(this).addClass('error');
                    }
                });
            });
        });
    </script>
}

وب اسمبلی چیست؟

<BlazorMode> ... </BlazorMode>
<WebAppDeploymentType> ... </WebAppDeploymentType>
 

• Currently it is not recommended to combine inline editing and form editing with treegrid, or the expanded column will not be editable. 

public class Article1
{
    public string Title { get; set; }
    public string? Subtitle { get; set; }
    public string Author { get; set; }
    public DateTime Published { get; set; }
}

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net7.0</TargetFramework>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>
  </PropertyGroup>
</Project>

Non-nullable property 'Title' must contain a non-null value when exiting constructor. Consider declaring the property as nullable. [CS11Tests]csharp(CS8618)
Non-nullable property 'Author' must contain a non-null value when exiting constructor. Consider declaring the property as nullable. [CS11Tests]csharp(CS8618)

public class Article2
{
    public Article2(string title, string subtitle, string author, DateTime published)
    {
        Title = title;
        Subtitle = subtitle;
        Author = author;
        Published = published;
    }

    public Article2(string title, string author, DateTime published)
    {
        Title = title;
        Author = author;
        Published = published;
    }

    public string Title { get; set; }
    public string? Subtitle { get; set; }
    public string Author { get; set; }
    public DateTime Published { get; set; }
}

 Article2 article = new("C# 11 Required Keyword", "A new language feature", "Name",  new DateTime(2022, 11, 12));

 public string Title { get; set; } = default!;

public class Article3
{
    public required string Title { get; set; }
    public string? Subtitle { get; set; }
    public required string Author { get; set; }
    public DateTime Published { get; set; }
}

public class Book
{
    public Book() => Name = string.Empty;

    public Book(string name) => Name = name;

    public required string Name { get; set; }
}

Book book = new("Book's Name");

Required member 'Book.Name' must be set in the object initializer or attribute constructor. [CS11Tests]csharp(CS9035)

public class Book
{
    [SetsRequiredMembers]
    public Book() => Name = string.Empty;

    [SetsRequiredMembers]
    public Book(string name) => Name = name;

    public required string Name { get; set; }
}

نکته ای که در مورد ماژول‌های native وجود دارد این هست که این ماژول‌ها دسترسی بدون محدودیتی به منابع سروری دارند و از این رو حتما باید این نکته را دقت کنید که ماژول native شما از یک منبع مورد اعتماد دریافت شده باشد.

%windir%\system32\inetsrv\config\applicationhost.config

کسی که نیاز به دسترسی به این مسیر و انجام تغییرات دارد باید در بالاترین سطح مدیریتی سرور باشد.

<globalModules> 
 
 <addname="DefaultDocumentModule"image="%windir%\system32\inetsrv\defdoc.dll"/> 
 
 <addname="DirectoryListingModule"image="%windir%\system32\inetsrv\dirlist.dll"/> 

<add name="StaticFileModule"image="%windir%\system32\inetsrv\static.dll"/>
...

 </globalModules>

 <add name="ManagedEngine64" image="%windir%\Microsoft.NET\Framework64\v2.0.50727\webengine.dll" preCondition="integratedMode,runtimeVersionv2.0,bitness64" /> 
 
 <add name="ManagedEngine" image="%windir%\Microsoft.NET\Framework\v2.0.50727\webengine.dll" preCondition="integratedMode,runtimeVersionv2.0,bitness32" /> 
 
<add name="ManagedEngineV4.0_32bit" image="%windir%\Microsoft.NET\Framework\v4.0.30319\webengine4.dll" preCondition="integratedMode,runtimeVersionv4.0,bitness32" /> 
 
<add name="ManagedEngineV4.0_64bit" image="%windir%\Microsoft.NET\Framework64\v4.0.30319\webengine4.dll" preCondition="integratedMode,runtimeVersionv4.0,bitness64" />

<modules runAllManagedModulesForAllRequests="true"/>

چرا و در چه زمانی باید به سراغ برنامه نویسی موازی رفت !؟

1- Dead Lock

public static void Function_A()
{
 lock (resource_1)
 {
   Thread.Sleep(1000);
   lock (resource_ 2)
   {
   }
 }
}

public static void Function_B()
{
 lock (resource_2)
 {
   Thread.Sleep(1000);
   lock (resource_1)
   {
   }
 }
}

static void Main()
{
  Thread thread_A = new Thread((ThreadStart)Function_A);
  Thread thread_B = new Thread((ThreadStart)Function_B);

  thread_A.Start();
  thread_B.Start();

  while (true)
  {
   // Stare at the two threads in deadlock.
  }
}