@page "/hotel-room/create"

@page "/hotel-room/create"
@page "/hotel-room/edit/{Id:int}"

@code
{
    // ...

    [Parameter] public int? Id { get; set; }

    protected override async Task OnInitializedAsync()
    {
        if (Id.HasValue)
        {
            // Update Mode
            Title = "Update";
            HotelRoomModel = await HotelRoomService.GetHotelRoomAsync(Id.Value);
        }
        else
        {
            // Create Mode
            HotelRoomModel = new HotelRoomDTO();
        }
    }

    // ...
}

<EditForm Model="HotelRoomModel" OnValidSubmit="HandleHotelRoomUpsert">

<tr>
    <td>@room.Name</td>
    <td>@room.Occupancy</td>
    <td>@room.RegularRate.ToString("c")</td>
    <td>@room.SqFt</td>
    <td>
        <NavLink href="@($"hotel-room/edit/{room.Id}")" class="btn btn-primary">Edit</NavLink>
    </td>
</tr>

namespace BlazorServer.Services
{
    public interface IHotelRoomService
    {
        Task<bool> IsRoomUniqueAsync(string name, int roomId);

        // ...
    }
}

namespace BlazorServer.Services
{
    public class HotelRoomService : IHotelRoomService
    {
        // ...
 
        public Task<bool> IsRoomUniqueAsync(string name, int roomId)
        {
            if (roomId == 0)
            {
                // Create Mode
                return _dbContext.HotelRooms
                                .ProjectTo<HotelRoomDTO>(_mapperConfiguration)
                                .AnyAsync(x => x.Name != name);
            }
            else
            {
                // Edit Mode
                return _dbContext.HotelRooms
                                .ProjectTo<HotelRoomDTO>(_mapperConfiguration)
                                .AnyAsync(x => x.Name != name && x.Id != roomId);
            }
        }
    }
}

// ...
@inject IJSRuntime JsRuntime


@code
{
   // ...

    private async Task HandleHotelRoomUpsert()
    {
        var isRoomUnique = await HotelRoomService.IsRoomUniqueAsync(HotelRoomModel.Name, HotelRoomModel.Id);
        if (!isRoomUnique)
        {
            await JsRuntime.ToastrError($"The room name: `{HotelRoomModel.Name}` already exists.");
            return;
        }

        if (HotelRoomModel.Id != 0 && Title == "Update")
        {
            // Update Mode
            var updateResult = await HotelRoomService.UpdateHotelRoomAsync(HotelRoomModel.Id, HotelRoomModel);
            await JsRuntime.ToastrSuccess($"The `{HotelRoomModel.Name}` updated successfully.");
        }
        else
        {
            // Create Mode
            var createResult = await HotelRoomService.CreateHotelRoomAsync(HotelRoomModel);
            await JsRuntime.ToastrSuccess($"The `{HotelRoomModel.Name}` created successfully.");
        }

        NavigationManager.NavigateTo("hotel-room");
    }
}

    <script src="~/Scripts/jquery.validate.min.js" type="text/javascript"></script>
    <script src="~/Scripts/jquery.validate.unobtrusive.min.js" type="text/javascript"></script>

    public class OrderDetailViewModel
    {
        [StringLength(15)]
        [Required]
        public string Destination { get; set; }
    }

@model Mvc4TestViewModel.Models.OrderDetailViewModel

@using (Ajax.BeginForm(actionName: "Index", controllerName: "Home",
                       ajaxOptions:new AjaxOptions(),
                       htmlAttributes: new { id = "Form1", name ="Form1" }, routeValues: new { }
                       ))
{
    @Html.AntiForgeryToken()
    @Html.ValidationSummary(true)

    <fieldset>
        <legend>OrderDetail</legend>
        <div class="editor-label">
            @Html.LabelFor(model => model.Destination)
        </div>
        <div class="editor-field">
            @Html.TextBoxFor(model => model.Destination, new { @class = "k-textbox" })
            @Html.ValidationMessageFor(model => model.Destination)
        </div>

        <p>
            <button class="k-button" type="submit" title="Sumbit">
                Sumbit
            </button>
        </p>
    </fieldset>
}

@section JavaScript
{
    <script type="text/javascript">
        $(function () {
            $("#Destination").kendoComboBox({
                dataSource: [
                    "loc 1",
                    "loc 2"
                ]
            });
    </script>
}

$.extend( $.validator, {
    defaults: {
     //…
     ignore: ":hidden",

    <script type="text/javascript">
        $(function () {
            var form = $('#Form1');
            form.data('validator').settings.ignore = ''; // default is ":hidden".
        });
    </script>

<script type="text/javascript">
    $.validator.setDefaults({
        ignore: ""
    });
</script>

 <script src="~/Scripts/kendo.aspnetmvc.js" type="text/javascript"></script>

    <script type="text/javascript">
        $(function () {
            $("form").kendoValidator();
        });
    </script>

 Required
StringLength
Range
RegularExpression

برای پیاده سازی آن می‌توان از رویداد Application_PreRequestHandlerExecute در فایل Global.asax استفاده کرد:

using System;
using System.IO.Compression;
using System.Web;
using System.Web.UI;

namespace GZipTest
{
    public class Global : HttpApplication
    {
        void Application_PreRequestHandlerExecute(object sender, EventArgs e)
        {
            var app = sender as HttpApplication;
            if (app == null) return;

            var acceptEncoding = app.Request.Headers["Accept-Encoding"];
            var prevUncompressedStream = app.Response.Filter;

            if (!(app.Context.CurrentHandler is Page ||
              app.Context.CurrentHandler.GetType().Name == "SyncSessionlessHandler") ||
            app.Request["HTTP_X_MICROSOFTAJAX"] != null)
                return;

            if (string.IsNullOrEmpty(acceptEncoding))
                return;

            acceptEncoding = acceptEncoding.ToLower();

            if (acceptEncoding.Contains("deflate") || acceptEncoding == "*")
            {
                // defalte
                app.Response.Filter = new DeflateStream(prevUncompressedStream, CompressionMode.Compress);
                app.Response.AppendHeader("Content-Encoding", "deflate");
            }
            else if (acceptEncoding.Contains("gzip"))
            {
                // gzip
                app.Response.Filter = new GZipStream(prevUncompressedStream, CompressionMode.Compress);
                app.Response.AppendHeader("Content-Encoding", "gzip");
            }
        }
    }
}

public class PostController : Controller
    {
        ApplicationDbContext db;
        // GET: Post
        public ActionResult List()
        {
            using (db=new ApplicationDbContext())
            {
                var query = db.Posts.ToList();
                return PartialView("List",query);
            }
        }
    }

<div ng-app="postmodule">

    <div ng-controller="PostController">
        <ul>
            <li ng-repeat="item in ListOfItems">
                {{item.Title}}
                <hr />
                {{item.Text}}
            </li>
        </ul>
    </div>

</div>

    <div class="container body-content" >

        <script src="~/Scripts/angular.js"></script>
        <script src="~/Scripts/angular-route.js"></script>
        <script>
            var PostApp = angular.module('postmodule', []).config(['$routeProvider',
  function ($routeProvider) {
      $routeProvider.
          when('/list', {
              templateUrl: '/Post/List',
              controller: 'PostController'
          });
  }]);
            PostApp.controller('PostController', function ($scope, $http, postServices) {
                //...
                $scope.ListOfItems =
                              postServices.GetPosts()
                                  .success(function (data) {
                                      $scope.ListOfItems = data;
                                  });
                //...
            });
            PostApp.service('postServices', function ($http) {
                this.GetPosts = function () {
                    return $http.get('/Post/List');
                };
            });
        </script>

        <a href="#list">list post</a>
        <div ng-view=""></div>

        @RenderBody()
        <hr />
        <footer>
            <p>&copy; @DateTime.Now.Year - My ASP.NET Application</p>
        </footer>
    </div>

SELECT
    [Id], 
    (SELECT top 1  * FROM  [AppUsers] FOR XML auto),
    HASHBYTES ('SHA2_256', (SELECT top 1  * FROM  [AppUsers] FOR XML auto)) AS [hash] -- varbinary(n), since 2012
FROM
    [AppUsers]

using System.Collections.Generic;

namespace EFCoreRowIntegrity
{
    public interface IAuditableEntity
    {
        string Hash { set; get; }
    }

    public static class AuditableShadowProperties
    {
        public static readonly string CreatedDateTime = nameof(CreatedDateTime);
        public static readonly string ModifiedDateTime = nameof(ModifiedDateTime);
    }

    public class Blog : IAuditableEntity
    {
        public int BlogId { get; set; }
        public string Url { get; set; }

        public List<Post> Posts { get; set; }

        public string Hash { get; set; }
    }

    public class Post : IAuditableEntity
    {
        public int PostId { get; set; }
        public string Title { get; set; }
        public string Content { get; set; }

        public int BlogId { get; set; }
        public Blog Blog { get; set; }

        public string Hash { get; set; }
    }
}

using System.Collections.Generic;
using Microsoft.EntityFrameworkCore.ChangeTracking;

namespace EFCoreRowIntegrity
{
    public class AuditEntry
    {
        public EntityEntry EntityEntry { set; get; }
        public IList<AuditProperty> AuditProperties { set; get; } = new List<AuditProperty>();

        public AuditEntry() { }

        public AuditEntry(EntityEntry entry)
        {
            EntityEntry = entry;
        }
    }

    public class AuditProperty
    {
        public string Name { set; get; }
        public object Value { set; get; }

        public bool IsTemporary { set; get; }
        public PropertyEntry PropertyEntry { set; get; }

        public AuditProperty() { }

        public AuditProperty(string name, object value, bool isTemporary, PropertyEntry property)
        {
            Name = name;
            Value = value;
            IsTemporary = isTemporary;
            PropertyEntry = property;
        }
    }
}

using System;
using System.Collections.Generic;
using System.Security.Cryptography;
using System.Text;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.ChangeTracking;
using Newtonsoft.Json;

namespace EFCoreRowIntegrity
{
    public static class HashingExtensions
    {
        public static string GenerateObjectHash(this object @object)
        {
            if (@object == null)
            {
                return string.Empty;
            }

            var jsonData = JsonConvert.SerializeObject(@object, Formatting.Indented);
            using (var hashAlgorithm = new SHA256CryptoServiceProvider())
            {
                var byteValue = Encoding.UTF8.GetBytes(jsonData);
                var byteHash = hashAlgorithm.ComputeHash(byteValue);
                return Convert.ToBase64String(byteHash);
            }
        }

        public static string GenerateEntityEntryHash(this EntityEntry entry, string propertyToIgnore)
        {
            var auditEntry = new Dictionary<string, object>();
            foreach (var property in entry.Properties)
            {
                var propertyName = property.Metadata.Name;
                if (propertyName == propertyToIgnore)
                {
                    continue;
                }
                auditEntry[propertyName] = property.CurrentValue;
            }
            return auditEntry.GenerateObjectHash();
        }

        public static string GenerateEntityHash<TEntity>(this DbContext context, TEntity entity, string propertyToIgnore)
        {
            return context.Entry(entity).GenerateEntityEntryHash(propertyToIgnore);
        }
    }
}

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.ChangeTracking;
using Microsoft.Extensions.Logging;

namespace EFCoreRowIntegrity
{
    public class BloggingContext : DbContext
    {
        public BloggingContext()
        { }

        public BloggingContext(DbContextOptions options)
            : base(options)
        { }

        public DbSet<Blog> Blogs { get; set; }
        public DbSet<Post> Posts { get; set; }

        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
        {
            if (!optionsBuilder.IsConfigured)
            {
                optionsBuilder.EnableSensitiveDataLogging();
                var path = Path.Combine(Directory.GetCurrentDirectory(), "app_data", "EFCore.RowIntegrity.mdf");
                optionsBuilder.UseSqlServer($"Server=(localdb)\\mssqllocaldb;Database=EFCore.RowIntegrity;AttachDbFilename={path};Trusted_Connection=True;");
                optionsBuilder.UseLoggerFactory(new LoggerFactory().AddConsole((message, logLevel) =>
                logLevel == LogLevel.Debug &&
                           message.StartsWith("Microsoft.EntityFrameworkCore.Database.Command")));
            }
        }

        protected override void OnModelCreating(ModelBuilder modelBuilder)
        {
            base.OnModelCreating(modelBuilder);

            foreach (var entityType in modelBuilder.Model
                                                   .GetEntityTypes()
                                                   .Where(e => typeof(IAuditableEntity)
                                                   .IsAssignableFrom(e.ClrType)))
            {
                modelBuilder.Entity(entityType.ClrType)
                            .Property<DateTimeOffset?>(AuditableShadowProperties.CreatedDateTime);
                modelBuilder.Entity(entityType.ClrType)
                            .Property<DateTimeOffset?>(AuditableShadowProperties.ModifiedDateTime);
            }
        }

        public override int SaveChanges()
        {
            var auditEntries = OnBeforeSaveChanges();
            var result = base.SaveChanges();
            OnAfterSaveChanges(auditEntries);
            return result;
        }

        private IList<AuditEntry> OnBeforeSaveChanges()
        {
            var auditEntries = new List<AuditEntry>();

            foreach (var entry in ChangeTracker.Entries<IAuditableEntity>())
            {
                if (entry.State == EntityState.Detached || entry.State == EntityState.Unchanged)
                {
                    continue;
                }

                var auditEntry = new AuditEntry(entry);
                auditEntries.Add(auditEntry);

                var now = DateTimeOffset.UtcNow;

                foreach (var property in entry.Properties)
                {
                    var propertyName = property.Metadata.Name;
                    if (propertyName == nameof(IAuditableEntity.Hash))
                    {
                        continue;
                    }

                    if (property.IsTemporary)
                    {
                        // It's an auto-generated value and should be retrieved from the DB after calling the base.SaveChanges().
                        auditEntry.AuditProperties.Add(new AuditProperty(propertyName, null, true, property));
                        continue;
                    }

                    switch (entry.State)
                    {
                        case EntityState.Added:
                            entry.Property(AuditableShadowProperties.CreatedDateTime).CurrentValue = now;
                            auditEntry.AuditProperties.Add(new AuditProperty(propertyName, property.CurrentValue, false, property));
                            break;
                        case EntityState.Modified:
                            auditEntry.AuditProperties.Add(new AuditProperty(propertyName, property.CurrentValue, false, property));
                            entry.Property(AuditableShadowProperties.ModifiedDateTime).CurrentValue = now;
                            break;
                    }
                }
            }

            return auditEntries;
        }

        private void OnAfterSaveChanges(IList<AuditEntry> auditEntries)
        {
            foreach (var auditEntry in auditEntries)
            {
                foreach (var auditProperty in auditEntry.AuditProperties.Where(x => x.IsTemporary))
                {
                    // Now we have the auto-generated value from the DB.
                    auditProperty.Value = auditProperty.PropertyEntry.CurrentValue;
                    auditProperty.IsTemporary = false;
                }
                auditEntry.EntityEntry.Property(nameof(IAuditableEntity.Hash)).CurrentValue =
                    auditEntry.AuditProperties.ToDictionary(x => x.Name, x => x.Value).GenerateObjectHash();
            }
            base.SaveChanges();
        }
    }
}

public override int SaveChanges()
{
    var auditEntries = OnBeforeSaveChanges();
    var result = base.SaveChanges();
    OnAfterSaveChanges(auditEntries);
    return result;
}

if (property.IsTemporary)
{
   // It's an auto-generated value and should be retrieved from the DB after calling the base.SaveChanges().
   auditEntry.AuditProperties.Add(new AuditProperty(propertyName, null, true, property));
   continue;
}

private static void CheckRow1IsAuthentic()
{
    using (var context = new BloggingContext())
    {
        var blog1 = context.Blogs.Single(x => x.BlogId == 1);
        var entityHash = context.GenerateEntityHash(blog1, propertyToIgnore: nameof(IAuditableEntity.Hash));
        var dbRowHash = blog1.Hash;
        Console.WriteLine($"entityHash: {entityHash}\ndbRowHash:  {dbRowHash}");
        if (entityHash == dbRowHash)
        {
            Console.WriteLine("This row is authentic!");
        }
        else
        {
            Console.WriteLine("This row is tampered outside of the application!");
        }
    }
}

entityHash: P110cYquWpoaZuTpCWaqBn6HPSGdoQdmaAN05s1zYqo=
dbRowHash: P110cYquWpoaZuTpCWaqBn6HPSGdoQdmaAN05s1zYqo=
This row is authentic!

entityHash: tdiZhKMJRnROGLLam1WpldA0fy/CbjJaR2Y2jNU9izk=
dbRowHash: P110cYquWpoaZuTpCWaqBn6HPSGdoQdmaAN05s1zYqo=
This row is tampered outside of the application!

var blogs = (from blog in context.Blogs.ToList() // Note: this `ToList()` is necessary here for having Shadow properties values, otherwise they will considered `null`.
             let computedHash = context.GenerateEntityHash(blog, nameof(IAuditableEntity.Hash))
             select new
             {
               blog.BlogId,
               blog.Url,
               RowHash = blog.Hash,
               ComputedHash = computedHash,
               IsAuthentic = blog.Hash == computedHash
             }).ToList();

public static string CurrentInvariantMonthName()
    {
        var month = DateTimeOffset.UtcNow.Month;
        return CultureInfo
            .InvariantCulture
            .DateTimeFormat
            .GetMonthName(month);
    }

#if MOCK_TIME
global using DateTimeOffset = StubDateTimeOffset; 
#else
global using DateTimeOffset = System.DateTimeOffset;
#endif

public static class StubDateTimeOffset
{
    private static System.DateTimeOffset? value;
    
    public static System.DateTimeOffset UtcNow 
        => value ?? System.DateTimeOffset.UtcNow ;
    
    public static void Set(System.DateTimeOffset dateTimeOffset) {
        value = dateTimeOffset;
    }

    public static void Reset() => value = null;
}

<PropertyGroup Condition=" '$(Configuration)' == 'Debug' ">
   <DefineConstants>MOCK_TIME</DefineConstants>
</PropertyGroup>

// set time
StubDateTimeOffset.Set(new(new(2022, 7, 1)));

<#@ template debug="false" hostspecific="false" language="C#" #>
<#@ output extension=".txt" #>

<# var T = DateTime.Now; #>

The Time is : <#= T #>

The Time is : <#=  DateTime.Now #>

<#@ template debug="true" hostspecific="false" language="C#" #>
<#@ output extension=".cs" #>

using System;
using System.Text;

<# string ClassName = "DotnetTips"; #>
public class <#= ClassName + "_" + new MyTestClass().Str #>
{
}

<#+
public class MyTestClass
{
public string  Str { get{return new DateTime().DayOfWeek.ToString() ;} }
}
#>

using System;
using System.Text;

public class DotnetTips_Monday
{
}

<#@ template debug="false" hostspecific="false" language="C#" #>
<#@ output extension=".html" #>

<html><body>
<table>
    <# for (int i = 1; i <= 10; i++)
       { #>
         <tr>
 <td>Test name <#= i #> </td>
             <td>Test value <#= i * i #> </td> 
 </tr>
    <# } #>
 </table>
</body></html>

new PersianDateTime(t.ResponseDate.Value).ToString(PersianDateTimeFormat.DateShortTime)

    /// <summary>
    /// Initializes a new instance of the PersianDateTime class to a specified dateTime.
    /// </summary>
    /// <param name="dateTime">A date and time in the Gregorian calendar.</param>
    public PersianDateTime(DateTime dateTime)
    {
        _dateTime = dateTime;
    }