c＃单独的类存储 [英] c# separate class for storage

问题描述

我使用多个类，我需要一个...让所有类和方法的全局存储。
是否是创建存储静态类的正确方法？

I use more than one class and I need a... lets say Global storage for all the class and method. Is it the right way to create a static class for storage?

public static class Storage
    {
        public static string filePath { get; set; }
    }

还有其他方法吗？

推荐答案

如果你真的需要让你的例子是一个单例，那么这是你怎么做的。

If you really need to make your example a singleton then here is how you do it.

public class StorageSingleton
{
    private static readonly StorageSingleton instance;

    static StorageSingleton() { 
         instance = new Singleton();
    }
    // Mark constructor as private as no one can create it but itself.
    private StorageSingleton() 
    { 
        // For constructing
    }

    // The only way to access the created instance.
    public static StorageSingleton Instance
    {
        get 
        {
            return instance;
        }
    }        

    // Note that this will be null when the instance if not set to
    // something in the constructor.
    public string FilePath { get; set; }
}

调用和设置单例的方法如下：

The way to call and set the singleton is the following:

// Is this is the first time you call "Instance" then it will create itself
var storage = StorageSingleton.Instance;

if (storage.FilePath == null)
{
    storage.FilePath = "myfile.txt";
}

或者，您可以向构造函数中添加以下内容以避免空引用异常： / p>

Alternatively you can add into the constructor the following to avoid null reference exception:

// Mark constructor as private as no one can create it but itself.
private StorageSingleton() 
{ 
    FilePath = string.Empty; 
}

警告词;使任何全局或单例将会打破你的代码长期。后来你真的应该检查存储库模式。

Word of warning; making anything global or singleton will break your code in the long run. Later on you really should be checking out the repository pattern.

这篇关于c＃单独的类存储的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！