60 lines
2.4 KiB
C#
60 lines
2.4 KiB
C#
using System;
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using System.Data.Entity;
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using System.Data.Entity.Infrastructure;
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using System.Data.Entity.Migrations;
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using System.Data.Entity.ModelConfiguration;
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using System.Data.SqlClient;
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using System.Linq;
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using System.Reflection;
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namespace Learun.DataBase.SqlServer
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{
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/// <summary>
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/// 版 本 PIT-ADMS V7.0.3 敏捷开发框架
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/// Copyright (c) 2013-2018 Hexagon PPM
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/// 创建人：研发部
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/// 日 期：2017.03.04
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/// 描 述：数据访问(SqlServer) 上下文
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/// </summary>
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public class DatabaseContext : DbContext, IDisposable, IObjectContextAdapter
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{
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#region 构造函数
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/// <summary>
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/// 初始化一个 使用指定数据连接名称或连接串 的数据访问上下文类 的新实例
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/// </summary>
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/// <param name="connString">连接字串</param>
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public DatabaseContext(string connString)
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: base(new SqlConnection(connString), true)
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{
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this.Configuration.AutoDetectChangesEnabled = false;
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this.Configuration.ValidateOnSaveEnabled = false;
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this.Configuration.LazyLoadingEnabled = false;
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this.Configuration.ProxyCreationEnabled = false;
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}
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#endregion
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#region 重载
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/// <summary>
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/// 模型创建重载
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/// </summary>
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/// <param name="modelBuilder">模型创建器</param>
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protected override void OnModelCreating(DbModelBuilder modelBuilder)
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{
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System.Data.Entity.Database.SetInitializer<DatabaseContext>(null);
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string assembleFileName = Assembly.GetExecutingAssembly().CodeBase.Replace("Learun.DataBase.SqlServer.DLL", "Learun.Application.Mapping.DLL").Replace("file:///", "");
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Assembly asm = Assembly.LoadFile(assembleFileName);
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var typesToRegister = asm.GetTypes()
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.Where(type => !String.IsNullOrEmpty(type.Namespace))
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.Where(type => type.BaseType != null && type.BaseType.IsGenericType && type.BaseType.GetGenericTypeDefinition() == typeof(EntityTypeConfiguration<>));
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foreach (var type in typesToRegister)
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{
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dynamic configurationInstance = Activator.CreateInstance(type);
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modelBuilder.Configurations.Add(configurationInstance);
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}
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base.OnModelCreating(modelBuilder);
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}
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#endregion
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}
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}
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