C# 从其他命名空间访问变量
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Accessing variables from other namespaces
提问by Adonis L
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
我是 C# 新手，一般来说我的问题是如何调用不同命名空间中的变量？如果我有这个代码
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"]);
}
and I am passing in service name how would I call one or multiple variable values from a different namespace?
我正在传入服务名称，我将如何从不同的命名空间调用一个或多个变量值？
采纳答案by Andy White
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.
通常，变量不会单独存在于命名空间中，它们存在于可能位于另一个命名空间中的另一个类中。如果您需要访问另一个类（在另一个命名空间中）中的变量，则您的另一个类需要以某种方式公开该变量。对此的常见做法是为变量使用公共属性（如果您只需要访问该变量，则为静态属性）。
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;}
}
}
回答by heartlandcoder
To add to Andy's answer you can also shorten the call to the MyInt property by adding this above the My.Namespace declaration:
要添加到安迪的答案中，您还可以通过在 My.Namespace 声明上方添加以下内容来缩短对 MyInt 属性的调用：
using My.Other.Namespace
If you do that then your call to the MyInt property would look like this:
如果您这样做，那么您对 MyInt 属性的调用将如下所示：
int MyValue = MyOtherClass.MyInt
回答by snr
As a side node, it can be done by adding reference to the assembly in which the publicmembers of another assembly are used. That's what incurred me.
作为侧节点，可以通过添加对public使用另一个程序集成员的程序集的引用来完成。这就是我招致的。
