Why does Boolean.ToString output "True" and not "true"

true.ToString() false.toString(); Output: True False Is there a valid reason for it being "True" and not "true"? It breaks when writing XML as XML's boolean type is lower case, and also isn't compatible with C#'s true/false (not sure about CLS though). Update Here is my very hacky way of getting around it in C# (for use with XML) internal static string ToXm

为什么Boolean.ToString输出“True”而不是“true”

true.ToString() false.toString(); Output: True False 有没有一个有效的理由是“真”而不是“真”? 当编写XML时,XML的布尔类型是小写,并且与C#的真/假不兼容(但不确定CLS)。 更新 这是我用C#解决它的一种非常冒险的方式(用于XML) internal static string ToXmlString(this bool b) { return b.ToString().ToLower(); } 当然,这增加了1个方法到堆栈,但是到处移除了ToLowers()。 只有来自微软的人才能真

Combining Lists using Concat

I have some code that's main purpose is to combine multiple like lists into one master list to return with the View. ActivityAuditDetails searchParams = new ActivityAuditDetails(); ActivityAuditDetails finalResults = new ActivityAuditDetails(); List<string> finalChangedColumns = new List<string>(); List<string> finalOldValues = new List<string>();

使用Concat组合列表

我有一些主要目的的代码是将多个像列表组合到一个主列表中以返回View。 ActivityAuditDetails searchParams = new ActivityAuditDetails(); ActivityAuditDetails finalResults = new ActivityAuditDetails(); List<string> finalChangedColumns = new List<string>(); List<string> finalOldValues = new List<string>(); List<string> finalNewValues = new List<string

Change some value inside the List<T>

I have some list (where T is a custom class, and class has some properties). I would like to know how to change one or more values inide of it by using Lambda Expressions, so the result will be the same as the foreach loop bellow: NOTE: list contains multiple items inside (multiple rows) foreach (MyClass mc in list) { if (mc.Name == "height") mc.V

更改List <T>中的某个值

我有一些列表(其中T是一个自定义类,而类有一些属性)。 我想知道如何通过使用Lambda表达式来更改其中的一个或多个值,因此结果将与foreach循环中的相同: 注意:列表中包含多个项目(多行) foreach (MyClass mc in list) { if (mc.Name == "height") mc.Value = 30; } 这是linq查询(使用Lambda表达式),但它与上面的foreach循环不一样,它只返回列表中的1个项

foreach loop and array values

I am writing a simple foreach loop to read key values from appconfig file. For some reason the array string called server looses previous values each time the foreach loop increments. Once the program runs to completion I see values as (server[0] = null, server[1]=null, server[2] = ). Only the last array pointer server[3] retains the values. My questions are: Why does the server[0] and ser

foreach循环和数组值

我正在编写一个简单的foreach循环来从appconfig文件中读取关键值。 出于某种原因,每次foreach循环递增时,称为服务器的数组字符串都会丢失先前的值。 一旦程序运行完成,我会将值看作(server [0] = null,server [1] = null,server [2] =)。 只有最后一个数组指针服务器[3]保留这些值。 我的问题是: 为什么服务器[0]和服务器[1]变为空。 我如何保留所有的数组值并将它们传递到foreach循环之外? private void butt

Concat all strings inside a List<string> using LINQ

Is there any easy LINQ expression to concatenate my entire List<string> collection items to a single string with a delimiter character? What if the collection is of custom objects instead of string ? Imagine I need to concatenate on object.Name . By using LINQ, this should work; string delimiter = ","; List<string> items = new List<string>() { "foo", "boo", "john", "doe" }

使用LINQ对List <string>中的所有字符串进行Concat

有没有简单的LINQ表达式将我的整个List<string>集合项连接到带有分隔符的单个string ? 如果集合是自定义对象而不是string呢? 想象一下,我需要连接object.Name 。 通过使用LINQ,这应该工作; string delimiter = ","; List<string> items = new List<string>() { "foo", "boo", "john", "doe" }; Console.WriteLine(items.Aggregate((i, j) => i + delimiter + j)); 课程描述: public class Foo

Looping through a list of Actions

I can't understand how to loop through an Action list. When I try it, I end up with the values being the same as the previous iteration. Here's the code (simplified example): string[] strings = { "abc", "def", "ghi" }; var actions = new List<Action>(); foreach (string str in strings) actions.Add(new Action(() => { Trace.WriteLine(str); })); foreach (var action in action

循环显示一系列操作

我无法理解如何通过Action列表循环。 当我尝试它时,我最终得到的值与之前的迭代相同。 以下是代码(简化示例): string[] strings = { "abc", "def", "ghi" }; var actions = new List<Action>(); foreach (string str in strings) actions.Add(new Action(() => { Trace.WriteLine(str); })); foreach (var action in actions) action(); 输出: ghi ghi ghi 为什么总是在执行操作时选择strings的

different result in .NET 4.0

Please see the code below that writes XML out to file a simple class containing a list of 3 objects. The 3 objects in the list descend from each other, Base, Derived1, Derived2. I use XMLArrayItemAttributes to override the names during Serialization. This works fine in .NET 3.0, but now outputs a different result in .NET 4.0. Please see the below Outputs, noting specifically the second descen

.NET 4.0中的不同结果

请参阅下面的代码,它将XML写出来提供一个包含3个对象列表的简单类。 列表中的3个对象相互下降,Base,Derived1,Derived2。 在序列化期间,我使用XMLArrayItemAttributes来覆盖名称。 这在.NET 3.0中运行良好,但现在在.NET 4.0中输出了不同的结果。 请参阅下面的输出,特别注意第二个后代项DerivedItem2。 有没有人有任何这方面的经验,以及我如何解决它在.NET 4.0中的工作,就像它在V3.5中所做的一样? 看来我无法控

Changed behavior of string.Empty (or System.String::Empty) in .NET 4.5

Short version: The C# code typeof(string).GetField("Empty").SetValue(null, "Hello world!"); Console.WriteLine(string.Empty); when compiled and run, gives output "Hello world!" under .NET version 4.0 and earlier, but gives "" under .NET 4.5 and .NET 4.5.1. How can a write to a field be ignored like that, or, who resets this field? Longer version: I have never really

在.NET 4.5中更改了string.Empty(或System.String :: Empty)的行为

简洁版本: C#代码 typeof(string).GetField("Empty").SetValue(null, "Hello world!"); Console.WriteLine(string.Empty); 当编译并运行时,输出"Hello world!" 在.NET 4.0和更低版本下,但在.NET 4.5和.NET 4.5.1下给出了"" 。 如何可以忽略写入字段,或者,谁重置该字段? 更长的版本: 我从来没有真正理解为什么string.Empty字段(也称为[mscorlib]System.String::Empty )不是const (又名

How to get localized string from ASP.NET Core Controller using IStringLocalizer?

Kinda confused here, super simple hello-world example of localization in ASP.Net Core 2.0. My About page is set up to render two localized strings: From the view (using IViewLocalizer ) From code (using IStringLocalizer<HomeController> via the controller) The code in the controller refuses to get the loc string appropriately. This is not complicated, what obvious things am I missing

如何从ASP.NET Core Controller使用IStringLocalizer获取本地化的字符串?

有点困惑,在ASP.Net Core 2.0中本地化超级简单的hello-world示例。 我的关于页面设置为呈现两个本地化的字符串: 从视图(使用IViewLocalizer ) 从代码中(通过控制器使用IStringLocalizer<HomeController> ) 控制器中的代码拒绝适当地获取loc字符串。 这并不复杂,我错过了什么明显的东西? About.cshtml @using Microsoft.AspNetCore.Mvc.Localization @inject IViewLocalizer Localizer @{ ViewData[

ASP.NET Core CORS WebAPI: no Access

I have deployed my ASP.NET Core web API to Azure, and I can access its endpoints using Swagger or a web debugger like Fiddler. In both cases (same origin in Swagger, different origin using Fiddler from my computer), when accessing the APIs I get the expected result, with CORS enabled as follows in my Startup.cs : add services.AddCors(); to ConfigureServices . add the middleware to Configure

ASP.NET Core CORS WebAPI:no Access

我已将ASP.NET Core web API部署到Azure,并且可以使用Swagger或Web调试器(如Fiddler)访问其端点。 在这两种情况下(Swagger中的相同来源,使用我的计算机中的Fiddler的不同来源),当访问API时,我会得到预期的结果,并在我的Startup.cs启用CORS,如下所示: add services.AddCors(); ConfigureServices 。 添加中间件到Configure :我知道这里的顺序很重要(ASP.NET 5:Access-Control-Allow-Origin的响应),所以我把