در یک پروژه nullable ref types فعال است و در دیگری خیر:
<Project Sdk="Microsoft.NET.Sdk"> <PropertyGroup> <Nullable>enable</Nullable> </PropertyGroup>
public class Person { public string? Name { get; set; } public string? Family { get; set; }
<Project Sdk="Microsoft.NET.Sdk"> <PropertyGroup> <Nullable>enable</Nullable> </PropertyGroup>
public class Person { public string? Name { get; set; } public string? Family { get; set; }
public class MyEntity { public Guid Id {get;set;} public string[] Strings { get; set; } }
modelBuilder.Entity<MyEntity>() .Id(e=> e.Id) .Property(e => e.Strings) .HasConversion( v => string.Join(',', v), v => v.Split(',', StringSplitOptions.RemoveEmptyEntries));
public class Product { //... public string Title { get; set; } public string TitleSlug { get; set; } // productAddModel.TitleSlug = SlugMethod(productAddModel.Title); }
namespace EF_Sample35.DataLayer { public class Sample35Context : DbContext { public DbSet<AlimentaryHabits> AlimentaryHabits { set; get; } public DbSet<Customer> Customers { set; get; } ... ... } }
public class UserViewModel { public string FirstName { get; set; } public string LastName { get; set; } public string Age { get; set; } } public class UserService { UserViewModel GetUserViewModel () { // return context.... } }
public class Column<T>
{
public string Name { set; get; }
public T Data { set; get; }
}
IList<Column<T>> myList = new List<Column<T>>();
using System.Collections;
namespace Tests
{
public interface IColumn
{
string Name { set; get; }
object Data { set; get; }
}
public class Column<T> : IColumn
{
public string Name { set; get; }
public T Data { set; get; }
object IColumn.Data
{
get { return this.Data; }
set { this.Data = (T)value; }
}
}
}
var myList = new List<IColumn>();
var myList = new List<IColumn>
{
new Column<int> { Data = 1, Name = "Col1"},
new Column<double> { Data = 1.2, Name = "Col2"}
};
static T GetColumnData<T>(IList<IColumn> list, string name)
{
var column = (Column<T>)Convert.ChangeType(list.Single(s => s.Name.Equals(name)), typeof(Column<T>), null);
return column.Data;
}
int data = GetColumnData<int>(myList, "Col1");
public interface IShoppingCartService { ShoppingCart GetContents(); ShoppingCart AddItemToCart(int itemId, int quantity); } public class ShoppingCartService : IShoppingCartService { public ShoppingCart GetContents() { throw new NotImplementedException("Get cart from Persistence Layer"); } public ShoppingCart AddItemToCart(int itemId, int quantity) { throw new NotImplementedException("Add Item to cart then return updated cart"); } } public class ShoppingCart { public List<product> Items { get; set; } } public class Product { public int ItemId { get; set; } public string ItemName { get; set; } } public class ShoppingCartController : Controller { //Concrete object below points to actual service //private ShoppingCartService _shoppingCartService; //loosely coupled code below uses the interface rather than the //concrete object private IShoppingCartService _shoppingCartService; public ShoppingCartController() { _shoppingCartService = new ShoppingCartService(); } public ActionResult GetCart() { //now using the shared instance of the shoppingCartService dependency ShoppingCart cart = _shoppingCartService.GetContents(); return View("Cart", cart); } public ActionResult AddItemToCart(int itemId, int quantity) { //now using the shared instance of the shoppingCartService dependency ShoppingCart cart = _shoppingCartService.AddItemToCart(itemId, quantity); return View("Cart", cart); } }
//loosely coupled code below uses the interface rather //than the concrete object private IShoppingCartService _shoppingCartService; //MVC uses this constructor public ShoppingCartController() { _shoppingCartService = new ShoppingCartService(); } //You can use this constructor when testing to inject the //ShoppingCartService dependency public ShoppingCartController(IShoppingCartService shoppingCartService) { _shoppingCartService = shoppingCartService; }
[TestClass] public class ShoppingCartControllerTests { [TestMethod] public void GetCartSmokeTest() { //arrange ShoppingCartController controller = new ShoppingCartController(new ShoppingCartServiceStub()); // Act ActionResult result = controller.GetCart(); // Assert Assert.IsInstanceOfType(result, typeof(ViewResult)); } } /// <summary> /// This is is a stub of the ShoppingCartService /// </summary> public class ShoppingCartServiceStub : IShoppingCartService { public ShoppingCart GetContents() { return new ShoppingCart { Items = new List<product> { new Product {ItemId = 1, ItemName = "Widget"} } }; } public ShoppingCart AddItemToCart(int itemId, int quantity) { throw new NotImplementedException(); } }
public interface ILogActionService { void Log(string data); } public class LogAttribute : ActionFilterAttribute { public ILogActionService LogActionService { get; set; } public override void OnActionExecuted(ActionExecutedContext filterContext) { LogActionService.Log("......data......"); base.OnActionExecuted(filterContext); } }
[Log] public ActionResult Index() {}
using StructureMap; using System.Collections.Generic; using System.Web.Mvc; namespace DI06.CustomFilters { public class StructureMapFilterProvider : FilterAttributeFilterProvider { private readonly IContainer _container; public StructureMapFilterProvider(IContainer container) { _container = container; } public override IEnumerable<Filter> GetFilters(ControllerContext controllerContext, ActionDescriptor actionDescriptor) { var filters = base.GetFilters(controllerContext, actionDescriptor); foreach (var filter in filters) { _container.BuildUp(filter.Instance); yield return filter; } } } }
//Using the custom StructureMapFilterProvider var filterProvider = FilterProviders.Providers.Single(provider => provider is FilterAttributeFilterProvider); FilterProviders.Providers.Remove(filterProvider); FilterProviders.Providers.Add(SmObjectFactory.Container.GetInstance<StructureMapFilterProvider>());
namespace DI06.IocConfig { public static class SmObjectFactory { private static readonly Lazy<Container> _containerBuilder = new Lazy<Container>(defaultContainer, LazyThreadSafetyMode.ExecutionAndPublication); public static IContainer Container { get { return _containerBuilder.Value; } } private static Container defaultContainer() { return new Container(x => { x.For<ILogActionService>().Use<LogActionService>(); x.Policies.SetAllProperties(y => { y.OfType<ILogActionService>(); }); }); } } }
using System; using System.Data.Entity; using System.Data.Entity.Migrations; using System.Diagnostics; using System.Linq; namespace EFGeneral { public class User { public int Id { get; set; } public string Name { get; set; } } public class MyContext : DbContext { public DbSet<User> Users { get; set; } } public class Configuration : DbMigrationsConfiguration<MyContext> { public Configuration() { AutomaticMigrationsEnabled = true; AutomaticMigrationDataLossAllowed = true; } protected override void Seed(MyContext context) { for (int i = 0; i < 21000; i++) { context.Users.Add(new User { Name = "name " + i }); if (i % 1000 == 0) context.SaveChanges(); } base.Seed(context); } } public class PerformanceHelper { public static string RunActionMeasurePerformance(Action action) { GC.Collect(); long initMemUsage = Process.GetCurrentProcess().WorkingSet64; var stopwatch = new Stopwatch(); stopwatch.Start(); action(); stopwatch.Stop(); var currentMemUsage = Process.GetCurrentProcess().WorkingSet64; var memUsage = currentMemUsage - initMemUsage; if (memUsage < 0) memUsage = 0; return string.Format("Elapsed time: {0}, Memory Usage: {1:N2} KB", stopwatch.Elapsed, memUsage / 1024); } } public static class Test { public static void RunTests() { Database.SetInitializer(new MigrateDatabaseToLatestVersion<MyContext, Configuration>()); StartDb(); for (int i = 0; i < 3; i++) { Console.WriteLine("\nRun {0}", i + 1); var memUsage = PerformanceHelper.RunActionMeasurePerformance(() => LoadWithTracking()); Console.WriteLine("LoadWithTracking:\n{0}", memUsage); memUsage = PerformanceHelper.RunActionMeasurePerformance(() => LoadWithoutTracking()); Console.WriteLine("LoadWithoutTracking:\n{0}", memUsage); } } private static void StartDb() { using (var ctx = new MyContext()) { var user = ctx.Users.Find(1); if (user != null) { // keep the object in memory } } } private static void LoadWithTracking() { using (var ctx = new MyContext()) { var list = ctx.Users.ToList(); if (list.Any()) { // keep the list in memory } } } private static void LoadWithoutTracking() { using (var ctx = new MyContext()) { var list = ctx.Users.AsNoTracking().ToList(); if (list.Any()) { // keep the list in memory } } } } }
namespace jQueryMvcSample03.Models { public class BlogPost { public int Id { set; get; } public string Title { set; get; } public string Body { set; get; } /// <summary> /// اطلاعات رای گیری یک مطلب به صورت یک خاصیت تو در تو یا پیچیده /// </summary> public Rating Rating { set; get; } public BlogPost() { Rating = new Rating(); } } }
namespace jQueryMvcSample03.Models { //[ComplexType] public class Rating { public double? TotalRating { get; set; } public int? TotalRaters { get; set; } public double? AverageRating { get; set; } } }
using System.Collections.Generic; using System.Linq; using jQueryMvcSample03.Models; namespace jQueryMvcSample03.DataSource { /// <summary> /// منبع داده فرضی /// </summary> public static class BlogPostDataSource { private static IList<BlogPost> _cachedItems; /// <summary> /// با توجه به استاتیک بودن سازنده کلاس، تهیه کش، پیش از سایر فراخوانیها صورت خواهد گرفت /// باید دقت داشت که این فقط یک مثال است و چنین کشی به معنای /// تهیه یک لیست برای تمام کاربران سایت است /// </summary> static BlogPostDataSource() { _cachedItems = createBlogPostsInMemoryDataSource(); } /// <summary> /// هدف صرفا تهیه یک منبع داده آزمایشی ساده تشکیل شده در حافظه است /// </summary> private static IList<BlogPost> createBlogPostsInMemoryDataSource() { var results = new List<BlogPost>(); for (int i = 1; i < 30; i++) { results.Add(new BlogPost { Id = i, Title = "عنوان " + i, Body = "متن ... متن ... متن " + i, Rating = new Rating { TotalRaters = i + 1, AverageRating = 3.5 } }); } return results; } /// <summary> /// پارامترهای شماره صفحه و تعداد رکورد به ازای یک صفحه برای صفحه بندی نیاز هستند /// شماره صفحه از یک شروع میشود /// </summary> public static IList<BlogPost> GetLatestBlogPosts(int pageNumber, int recordsPerPage = 4) { var skipRecords = pageNumber * recordsPerPage; return _cachedItems .OrderByDescending(x => x.Id) .Skip(skipRecords) .Take(recordsPerPage) .ToList(); } } }
/* star rating system */ .post_rating { direction: ltr; } .rating { text-indent: -99999px; overflow: hidden; background-repeat: no-repeat; display: inline-block; width: 8px; height: 16px; } .rating.stars { background-image: url('Images/star_rating.png'); } .rating.stars.active { cursor: pointer; } .star-left_off { background-position: -0px -0px; } .star-left_on { background-position: -16px -0px; } .star-right_off { background-position: -8px -0px; } .star-right_on { background-position: -24px -0px; }
// <![CDATA[ (function ($) { $.fn.StarRating = function (options) { var defaults = { ratingStarsSpan: '.rating.stars', postInfoUrl: '/', loginUrl: '/login', errorHandler: null, completeHandler: null, onlyOneTimeHandler: null }; var options = $.extend(defaults, options); return this.each(function () { var ratingStars = $(this); $(ratingStars).unbind('mouseover'); $(ratingStars).mouseover(function () { var span = $(this).parent("span"); var newRating = $(this).attr("value"); setRating(span, newRating); }); $(ratingStars).unbind('mouseout'); $(ratingStars).mouseout(function () { var span = $(this).parent("span"); var rating = span.attr("rating"); setRating(span, rating); }); $(ratingStars).unbind('click'); $(ratingStars).click(function () { var span = $(this).parent("span"); var newRating = $(this).attr("value"); var text = span.children("span"); var pID = span.attr("post"); var type = span.attr("sectiontype"); postData({ postID: pID, rating: newRating, sectionType: type }); span.attr("rating", newRating); setRating(span, newRating); }); function setRating(span, rating) { span.find(options.ratingStarsSpan).each(function () { var value = parseFloat($(this).attr("value")); var imgSrc = $(this).attr("class"); if (value <= rating) $(this).attr("class", imgSrc.replace("_off", "_on")); else $(this).attr("class", imgSrc.replace("_on", "_off")); }); } function postData(dataJsonArray) { $.ajax({ type: "POST", url: options.postInfoUrl, data: JSON.stringify(dataJsonArray), contentType: "application/json; charset=utf-8", dataType: "json", complete: function (xhr, status) { var data = xhr.responseText; if (xhr.status == 403) { window.location = options.loginUrl; } else if (status === 'error' || !data) { if (options.errorHandler) options.errorHandler(this); } else if (data == "nok") { if (options.onlyOneTimeHandler) options.onlyOneTimeHandler(this); } else { if (options.completeHandler) options.completeHandler(this); } } }); } }); }; })(jQuery); // ]]>
{ postID: pID, rating: newRating, sectionType: type }
<head> <title>@ViewBag.Title</title> <link href="@Url.Content("Content/starRating.css")" rel="stylesheet" type="text/css" /> <link href="@Url.Content("Content/Site.css")" rel="stylesheet" type="text/css" /> <script src="@Url.Content("~/Scripts/jquery-1.9.1.min.js")" type="text/javascript"></script> <script src="@Url.Content("~/Scripts/jquery.validate.min.js")" type="text/javascript"></script> <script src="@Url.Content("~/Scripts/jquery.unobtrusive-ajax.min.js")" type="text/javascript"></script> <script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")" type="text/javascript"></script> <script src="@Url.Content("~/Scripts/jquery.StarRating.js")" type="text/javascript"></script> @RenderSection("JavaScript", required: false) </head>
@using System.Globalization @helper AddStarRating(int postId, double? average = 0, int? postRatingsCount = 0, string type = "BlogPost", string tooltip = "لطفا جهت رای دادن کلیک نمائید") { string actIt = "active "; if (!average.HasValue) { average = 0; } if (!postRatingsCount.HasValue) { postRatingsCount = 0; } <span class='postRating' rating='@average' post='@postId' title='@tooltip' sectiontype='@type'> @for (double i = .5; i <= 5.0; i = i + .5) { string left; if (i <= average) { left = (i * 2) % 2 == 1 ? "left_on" : "right_on"; } else { left = (i * 2) % 2 == 1 ? "left_off" : "right_off"; } <span class='rating stars @(actIt)star-@left' value='@i'></span> } @if (postRatingsCount > 0) { var ratingInfo = string.Format(CultureInfo.InvariantCulture, "امتیاز {0:0.00} از 5 توسط {1} نفر", average, postRatingsCount); <span>@ratingInfo</span> } else { <span></span> } </span> }
using System.Web.Mvc; using System.Web.UI; using jQueryMvcSample03.DataSource; using jQueryMvcSample03.Security; namespace jQueryMvcSample03.Controllers { public class HomeController : Controller { public ActionResult Index() { var postsList = BlogPostDataSource.GetLatestBlogPosts(pageNumber: 0); return View(postsList); //نمایش صفحه اصلی } [HttpPost] [AjaxOnly] [OutputCache(Location = OutputCacheLocation.None, NoStore = true)] public ActionResult SaveRatings(int? postId, double? rating, string sectionType) { if (postId == null || rating == null || string.IsNullOrWhiteSpace(sectionType)) return Content(null); //اعلام بروز خطا if (!this.HttpContext.CanUserVoteBasedOnCookies(postId.Value, sectionType)) return Content("nok"); //اعلام فقط یکبار مجاز هستید رای دهید switch (sectionType) //قسمتهای مختلف سایت که در جداول مختلفی قرار دارند نیز میتوانند گزینه امتیاز دهی داشته باشند { case "BlogPost": //الان شماره مطلب و رای ارسالی را داریم که میتوان نسبت به ذخیره آن اقدام کرد //مثلا //_blogPostsService.SaveRating(postId.Value, rating.Value); break; //... سایر قسمتهای دیگر سایت default: return Content(null); //اعلام بروز خطا } return Content("ok"); //اعلام موفقیت آمیز بودن ثبت اطلاعات } [HttpGet] public ActionResult Post(int? id) { if (id == null) return Redirect("/"); //todo: show the content here return Content("Post " + id.Value); } } }
using System; using System.Web; namespace jQueryMvcSample03.Security { public static class CookieHelper { public static bool CanUserVoteBasedOnCookies(this HttpContextBase httpContext, int postId, string sectionType) { string key = sectionType + "-" + postId; var value = httpContext.GetCookieValue(key); if (string.IsNullOrWhiteSpace(value)) { httpContext.AddCookie(key, key); return true; } return false; } public static void AddCookie(this HttpContextBase httpContextBase, string cookieName, string value) { httpContextBase.AddCookie(cookieName, value, DateTime.Now.AddDays(30)); } public static void AddCookie(this HttpContextBase httpContextBase, string cookieName, string value, DateTime expires) { var cookie = new HttpCookie(cookieName) { Expires = expires, Value = httpContextBase.Server.UrlEncode(value) // For Cookies and Unicode characters }; httpContextBase.Response.Cookies.Add(cookie); } public static string GetCookieValue(this HttpContextBase httpContext, string cookieName) { var cookie = httpContext.Request.Cookies[cookieName]; if (cookie == null) return string.Empty; //cookie doesn't exist // For Cookies and Unicode characters return httpContext.Server.UrlDecode(cookie.Value); } } }
using jQueryMvcSample03.Models; namespace jQueryMvcSample03.DataSource { public interface IBlogPostsService { void SaveRating(int postId, double rating); } public class SampleService : IBlogPostsService { /// <summary> /// یک نمونه از متد ذخیره سازی اطلاعات پیشنهادی /// فقط برای ایده گرفتن /// بدیهی است محل قرارگیری اصلی آن در لایه سرویس برنامه شما خواهد بود /// </summary> public void SaveRating(int postId, double rating) { BlogPost post = null; //post = _blogCtx.Find(postId); // بر اساس شماره مطلب، مطلب یافت شده و فیلدهای آن تنظیم میشوند if (post == null) return; if (!post.Rating.TotalRaters.HasValue) post.Rating.TotalRaters = 0; if (!post.Rating.TotalRating.HasValue) post.Rating.TotalRating = 0; if (!post.Rating.AverageRating.HasValue) post.Rating.AverageRating = 0; post.Rating.TotalRaters++; post.Rating.TotalRating += rating; post.Rating.AverageRating = post.Rating.TotalRating / post.Rating.TotalRaters; // todo: call save changes at the end. } } }
@using System.Text.RegularExpressions @model IList<jQueryMvcSample03.Models.BlogPost> <ul> @foreach (var item in Model) { <li> <fieldset> <legend>مطلب @item.Id</legend> <h5> @Html.ActionLink(linkText: item.Title, actionName: "Post", controllerName: "Home", routeValues: new { id = item.Id }, htmlAttributes: null) </h5> @item.Body <div class="post_rating"> @Html.Raw(Regex.Replace(@StarRatingHelper.AddStarRating(item.Id, item.Rating.AverageRating, item.Rating.TotalRaters, "BlogPost").ToHtmlString(), @">\s+<", "><")) </div> </fieldset> </li> } </ul>
@model IList<jQueryMvcSample03.Models.BlogPost> @{ ViewBag.Title = "Index"; var postInfoUrl = Url.Action(actionName: "SaveRatings", controllerName: "Home"); } <h2> سیستم امتیاز دهی</h2> @{ Html.RenderPartial("_ItemsList", Model); } @section JavaScript { <script type="text/javascript"> $(document).ready(function () { $(".rating.stars.active").StarRating({ ratingStarsSpan: '.rating.stars', postInfoUrl: '@postInfoUrl', loginUrl: '/login', errorHandler: function () { alert('خطایی رخ داده است'); }, completeHandler: function () { alert('با تشکر! رای شما با موفقیت ثبت شد'); }, onlyOneTimeHandler: function () { alert('فقط یکبار میتوانید به ازای هر مطلب رای دهید'); } }); }); </script> }