C#---继承单例的实现

 

c#可继承单例模板的实现，网上很多都是以另一种方式实现的，在使用时去控制，而不是生成的时候控制。

也是从别人那里捞过来的，但是具体的出处忘记在哪了，感谢那位无名的大哥！

 

using System;
using System.Linq;
using System.Reflection;

//利用Reflection与Lazy实现单例模式的泛型实现
public abstract class SPDataBase_Singleton<T> where T : class 
{
    private static readonly Lazy<T> _instance
      = new Lazy<T>(() =>
      {
          var ctors = typeof(T).GetConstructors(
              BindingFlags.Instance
              | BindingFlags.NonPublic
              | BindingFlags.Public);
          if (ctors.Count() != 1)
              throw new InvalidOperationException(String.Format("Type {0} must have exactly one constructor.", typeof(T)));
          var ctor = ctors.SingleOrDefault(c => !c.GetParameters().Any() && c.IsPrivate);
          if (ctor == null)
              throw new InvalidOperationException(String.Format("The constructor for {0} must be private and take no parameters.", typeof(T)));
          return (T)ctor.Invoke(null);
      }, true);

    public string DataName { get; set; }

    public static T Instance
    {
        get{
            return _instance.Value;
        }
    }

    public bool CheckMsgFunc(string name,SpObject msg)
    {
        Type t = this.GetType();
        //Debug.Log("Checking type .. " + t);
        MethodInfo method = t.GetMethod(name);
        if(method != null)
        {
            //Debug.Log("Find " + name + " in " + t + "  " + Instance.GetHashCode());
            method.Invoke(Instance, new SpObject[] {msg });
            return true;
        }
        else
        {
            //Debug.Log("Can't find " + name + " in " + t);
            return false;
        }
    }

}