abstract class CAbstract { private string mParam1; public CAbstract(string param1) { mParam1 = param1; } } class CBase : CAbstract { } 对于CBase类，它应该通过提供参数来初始化，那么如何禁用CBase类的无参数构造函数？ If you define a parameterized constructor in CBase , there is no default constructor. You do not need to do anything special. If your intention is for all derived
abstract class CAbstract { private string mParam1; public CAbstract(string param1) { mParam1 = param1; } } class CBase : CAbstract { } 对于CBase类，它应该通过提供参数来初始化，那么如何禁用CBase类的无参数构造函数？ 如果你在CBase定义了一个参数化的构造函数，那么没有默认的构造函数。 你不需要做任何特别的事情。 如果你的意图是所有CAbstract派生类实现一个参数化的构造函数，那是你不能
In C#, I want to initialize a string value with an empty string. How should I do this? What is the right way, and why? string willi = string.Empty; or string willi = String.Empty; or string willi = ""; or what? Use whatever you and your team find the most readable. Other answers have suggested that a new string is created every time you use "" . This is not true - due to s
在C＃中，我想用一个空字符串初始化一个字符串值。 我应该怎么做？ 什么是正确的方式，为什么？ string willi = string.Empty; 要么 string willi = String.Empty; 要么 string willi = ""; 或者是什么？ 使用任何你和你的团队发现的最具可读性。 其他答案建议每次使用""时都会创建一个新字符串。 这不是真的 - 由于字符串interning，它会创建一个程序集或每个AppDomain一次（或可能一次为整个过程 - 不
I have a structure something like this struct MyStructure :IFoo { } and a method like this: public BarThisFoo(IFoo a) { } my question is does passing the structure into that method "box" the structure, thus causing a garbage allocation? Addendum: Before anyone says it, garbage collection is not free in this application, it's actually very sensitive to garbage collections,
我有一个像这样的结构 struct MyStructure :IFoo { } 和一个像这样的方法： public BarThisFoo(IFoo a) { } 我的问题是将结构传递给该方法“框”的结构，从而导致垃圾分配？ 附录：在任何人说出来之前，垃圾收集在这个应用程序中并不是免费的，它实际上对垃圾收集非常敏感，所以免费分配代码很重要。 是的，它确实。 每当您从以下位置转换时都会发生拳 一个值类型到一个对象引用 一个值类型为System.ValueType引
There are two weird operators in C#: the true operator the false operator If I understand this right these operators can be used in types which I want to use instead of a boolean expression and where I don't want to provide an implicit conversion to bool. Let's say I have a following class: public class MyType { public readonly int Value; public MyType(in
C＃中有两个奇怪的运算符： 真正的运营商 虚假的运营商 如果我理解这个权利，这些运算符可以用于我想要使用的类型而不是布尔表达式，并且我不想向bool提供隐式转换。 假设我有一个以下课程： public class MyType { public readonly int Value; public MyType(int value) { Value = value; } public static bool operator true (MyType mt) {
I'm wondering what the best way is to have a "if all else fails catch it". I mean, you're handling as much exceptions as possible in your application, but still there are bound to be bugs, so I need to have something that catches all unhandled exceptions so I can collect information and store them in a database or submit them to a web service. Does the AppDomain.CurrentDomai
我想知道什么是最好的方法是“如果一切都失败了”。 我的意思是，您在应用程序中尽可能多地处理异常，但仍然一定会出现bug，所以我需要有一些能够捕获所有未处理的异常的东西，以便我可以收集信息并将它们存储在数据库中或提交它们到Web服务。 AppDomain.CurrentDomain.UnhandledException事件是否捕获所有内容？ 即使应用程序是多线程的？ 注意：Windows Vista公开了允许任何应用程序在崩溃后自行恢复的本机API函数......
我想有一些函数将返回“基地”如果类的可变Base传递给它，“派生”如果它被声明为Derived等不依赖于运行时类型就被分配到一个值。 See code below for example. The key is to use Generics , extension method was used just for nice syntax. using System; static class Program { public static Type GetDeclaredType<T>(this T obj) { return typeof(T); } // Demonstrate how GetDeclaredTyp
我想有一些函数将返回“基地”如果类的可变Base传递给它，“派生”如果它被声明为Derived等不依赖于运行时类型就被分配到一个值。 例如，请参阅下面的代码。 关键是使用泛型 ，扩展方法只用于很好的语法。 using System; static class Program { public static Type GetDeclaredType<T>(this T obj) { return typeof(T); } // Demonstrate how GetDeclaredType works static void Main(string[
Reminiscent of the title of a bootleg live Rolling Stones recording of yesteryear, Resharper is sharper than I'll ever be; as I had it inspect my code, it told me this regarding closures: 1) "Loop: foreach (var item in PlatypiIds) { var query = db.Table<Locations>().Where(l => l.PlatypusId == item). Where(l=> l.SentTimeUTC >=
让人想起滚滚乐队滚石乐队昔日唱片的头衔，Resharper比我永远都要犀利; 因为我检查了我的代码，它告诉了我关于闭包的事情： 1）“循环： foreach (var item in PlatypiIds) { var query = db.Table<Locations>().Where(l => l.PlatypusId == item). Where(l=> l.SentTimeUTC >= EarliestToShow). Where(l=> l.SentTimeUTC <= LatestToShow)
I'm getting this ReSharper warning: Access to foreach variable in closure. May have different behaviour when compiled with different versions of compiler . This is what I'm doing: @foreach(var item in Model) { // Warning underlines "item". <div>@Html.DisplayBooleanFor(modelItem => item.BooleanField)</div> } My extension is as follows: public static MvcHtmlStri
我得到了这个ReSharper警告： 在闭包中访问foreach变量。 使用不同版本的编译器编译时可能会有不同的行为 。 这就是我正在做的事情： @foreach(var item in Model) { // Warning underlines "item". <div>@Html.DisplayBooleanFor(modelItem => item.BooleanField)</div> } 我的扩展如下： public static MvcHtmlString DisplayBooleanFor<TModel, TValue>( this HtmlHelper<TModel>
Here's a little experiment I did: MyClass obj = dataContext.GetTable<MyClass>().Where(x => x.ID = 1).Single(); Console.WriteLine(obj.MyProperty); // output = "initial" Console.WriteLine("Waiting..."); // put a breakpoint after this line obj = null; obj = dataContext.GetTable<MyClass>().Where(x => x.ID = 1).Single(); // same as before, but reloaded Console.WriteLine(obj.MyPr
这是我做的一个小实验： MyClass obj = dataContext.GetTable<MyClass>().Where(x => x.ID = 1).Single(); Console.WriteLine(obj.MyProperty); // output = "initial" Console.WriteLine("Waiting..."); // put a breakpoint after this line obj = null; obj = dataContext.GetTable<MyClass>().Where(x => x.ID = 1).Single(); // same as before, but reloaded Console.WriteLine(obj.MyProperty); // out
Here's a little LinqToSql GOTCHA: // Returns the number of counties in a state, // or all counties in the USA if the state is null public static int CountCounties(State s) { var q = from cy in County.GetTable() // my method to get the ITable where (s == null || s.Code == cy.StateCode) // shortcut OR operator, right...? select cy; return q.Count(); } Guess what - if you pas
这里有一点LinqToSql GOTCHA： // Returns the number of counties in a state, // or all counties in the USA if the state is null public static int CountCounties(State s) { var q = from cy in County.GetTable() // my method to get the ITable where (s == null || s.Code == cy.StateCode) // shortcut OR operator, right...? select cy; return q.Count(); } 猜猜看 - 如果你传递一个null Sta