从其他名称空间访问变量 [英] Accessing variables from other namespaces

问题描述

我是C#和编程的新手，我的问题是如何调用位于不同命名空间中的变量?如果我有此代码

I am new to C# and programming in general my question is how do you call a variable that is in a different namespace? if I have this code

public void servicevalues(string _servicename)
{
  string servicename = _servicename;
  string query = string.Format("SELECT * FROM Win32_Service WHERE Name ='{0}'", servicename);
  ManagementObjectSearcher moquery = new ManagementObjectSearcher(query);
  ManagementObjectCollection queryCollection = moquery.Get();
  foreach (ManagementObject service in queryCollection)
  {
    string serviceId = Convert.ToString(service["DisplayName"]);
    bool serviceResult = Convert.ToBoolean(service["Started"]);
  }

并且我要传递服务名称，如何从另一个名称空间调用一个或多个变量值?

and I am passing in service name how would I call one or multiple variable values from a different namespace?

推荐答案

通常，变量并不仅仅存在于一个命名空间中，它们存在于另一个可能位于另一个命名空间中的类中.如果您需要访问另一个类(在另一个名称空间中)的变量，则另一个类需要以某种方式公开该变量.常见的做法是为变量使用公共属性(如果只需要访问该变量，则为静态).

Normally, variables don't live in a namespace alone, they live inside another class that could be in another namespace. If you need to access a variable in another class (in another namespace), your other class needs to expose the variable somehow. The common practice for this is to use a public Property (static if you only need access to that variable) for the variable.

namespace My.Namespace
{
    public class MyClassA
    {
        public void MyMethod()
        {
            // Use value from MyOtherClass
            int myValue = My.Other.Namespace.MyOtherClass.MyInt;
        }
    }
}

namespace My.Other.Namespace
{
    public class MyOtherClass
    {
        private static int myInt;
        public static int MyInt
        {
            get {return myInt;}
            set {myInt = value;}
        }

        // Can also do this in C#3.0
        public static int MyOtherInt {get;set;}
    }
}

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