zoukankan      html  css  js  c++  java
  • ModelContext模型上下文

    using System;

    using System.Collections.Generic;

    using System.Linq;

    using System.Web;

     

    namespace TeamService.Data

    {

        public class ModelContextStatus

        {

            public const int DISABLED = 0x0000;

            public const int NORMAL = 0x0001;

            public const int DELETED = 0x0004;

        }

        /// <summary>

        /// EntityContext class provides unified access to EF entities

        /// </summary>

        public class ModelContext

        {

            public const int STATUS_DISABLED = ModelContextStatus.DISABLED;

            public const int STATUS_NORMAL = ModelContextStatus.NORMAL;

            public const int STATUS_DELETED = ModelContextStatus.DELETED;

            public const int REMOTE_SERVER = 0;

            public const int LOCAL_SERVER = 1;

     

            private static ModelContainer modelContext = null;

     

     

            /// <summary>

            /// Return current entity framework context, if the connection has not open

            /// yet, it will create the connection to database.

            /// </summary>

            public static ModelContainer Container

            {

                get

                {

                    if (modelContext == null)

                    {

                        modelContext = new ModelContainer();

                      

                        if (modelContext.Connection.State != System.Data.ConnectionState.Open)

                        {

                            modelContext.Connection.Open();

                        }

                    }

                    return modelContext;

                }

            }

        }

    }

  • 相关阅读:
    SSH应用
    [数字信号处理]IIR滤波器的间接设计(C代码)
    C#调用ATL COM
    【deep learning学习笔记】最近读的几个ppt(未完...)
    程序中输出两位小数
    Exchange Server 2007 部署:安装时的 10 条提示
    中兴通讯变卖资产首季实现扭亏
    iPhone市场份额急跌 苹果亟需新产品确保市场地位
    如何做一个真正牛X 的开源项目
    提高PHP编程效率的53种方法
  • 原文地址:https://www.cnblogs.com/quietwalk/p/2136033.html
Copyright © 2011-2022 走看看