为对象属性分配静态 [英] assigning static to an object property

问题描述

为什么当我执行以下操作时为什么:

Why is it when I do something as follows:

public readonly string _objectString = ExtNameSpace.StaticClass.MyVar;

where MyVar is defined inside the static class StaticClass as

public static readonly string MyVar

我收到以下错误:

非静态字段，方法或属性需要对象引用

我期望这会以相反的方式发生，即如果我将对象变量分配给静态成员变量.

I get the following error:

An object reference is required for the nonstatic field, method, or property

I was expecting this to happen the other way around, ie if I am assigning an object variable to a static member variable.

推荐答案

您只需要了解 instance (非静态)方法有效；这是了解OOP的起点之一.

请参阅我过去的解决方案，在此我会对其进行详细说明:是什么使静态的 [ ^ ].

—SA

You just need to understand how instance (non-static) methods work; which is one of the starting point to get before to understand OOP.

Please see my past solution where I explain it in a pretty detailed manner: What makes static methods accessible?[^].

—SA

我无法在.NET 4.0中重现此行为.您正在使用哪个版本的.NET?

我能想到的唯一会产生错误消息的情况是，如果您尝试使用MyVar现在定义在另一个静态类中的方式(非静态)来定义MyVar.

如果是这种情况，则只需将"MyVar"的声明更改为:

I''m unable to reproduce this behavior in .NET 4.0. Which version of .NET are you using ?

The only scenario I can think of that would produce the error message you report is if you tried to define MyVar the way it is now (non-static) inside another class which is static.

If that''s the case then simply change ''MyVar''s declaration to:

public static readonly string _objectString = ExtNameSpace.StaticClass.MyVar;

如果这不是答案，请在定义变量_objectString的位置显示选择的代码，然后发生在其中的类的声明.

If that''s not an answer, please show a selection of your code at the place where the variable _objectString is defined, and the declaration for the class it occurs in.

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