我如何使用全局实例类

hello sorry my english is not good,I hope you can understand me.. I'm using this DbEntities and other classes everywhere
How do I use this classes global? I don't want to create continuously instance, example Can I do this with single pattern? or global Constructor ? or What should I do?

你好抱歉我的英语不好，我希望你能理解我..我正在使用这个DbEntities和其他类到处如何使用这个全局类？我不想连续创建实例，例子我可以使用单一模式吗？还是全局构造函数？或者我该怎么办？

thank you

谢谢

 namespace Crewnetix.Entity.Concrete 
{
    public class Crew
    {
        DbEntities _DbEntities = new DbEntities (); >> object context db entities
        CertificateItem _Certificate = new CertificateItem ();
        WorldProcess _WorldProcess = new WorldProcess ();
        List<CertificateItem> _Certificates = new List<CertificateItem>();     
        CountryCity.CountryItem _Country = new CountryCity.CountryItem();

     }
}

  namespace Docnetix.Entity.Concrete
{
    public class Document
    {
        DbEntities _DbEntities = new DbEntities ();
        CertificateItem _Certificate = new CertificateItem ();
        WorldProcess _WorldProcess = new WorldProcess ();
        List<CertificateItem> _Certificates = new List<CertificateItem>();     
        CountryCity.CountryItem _Country = new CountryCity.CountryItem();

  }


  namespace accountingnetix.Entity.Concrete
{
    public class accounting
    {
        DbEntities _DbEntities = new DbEntities ();  
        CertificateItem _Certificate = new CertificateItem ();
        WorldProcess _WorldProcess = new WorldProcess ();
        List<CertificateItem> _Certificates = new List<CertificateItem>();     
        CountryCity.CountryItem _Country = new CountryCity.CountryItem();        
  }
}

example I want to it..I thought it

例子我想要它......我想到了

  namespace Global
{
    public static class GlobalInstance
    {
        public static object GetCreateInstance(object class); >> class name
        {
              ...code
            return newInstance;
        }    
    }     
  }
}

  namespace crewnetix
{
    public class crew
    {
       object instance = GetCreateInstance(CertificateItem) >> class name

    }     
  }
}

2 个解决方案

#1

Singleton Is perfect for your goal:

Singleton非常适合您的目标：

//1) make your constructor private

//2) add this code:

private static Your_Class_Name _Instance;
public static Your_Class_Name Instance
{
    get
    {
        if (_Instance == null)
            _Instance = new Your_Class_Name();
        return  _Instance;
    }
}

#2

You could make the classes static? and mark each member you also would like to be global / static , e.g:

你可以让这些类是静态的吗？并标记每个成员您也希望是全局/静态的，例如：

public static class A 
{
  public static string GetSomething() 
  {
      // get something and return it
  }

  public static string AProperty
  {
      // getter and setter
  }
}

using the class;

使用班级;

A.GetSomething()
var a = A.AProperty;

you would not need to create an instance.

你不需要创建一个实例。

#1