1.分层

2.项目依赖关系

MODEL

IDAL -> MODEL

DAL -> IDAL,MODEL,EntityFramewrok(注意和MODEL里的版本要一致),System.Data.Entity

IBLL -> IDAL,MODEL

BLL ->  IBLL,IDAL,MODEL,DI

Controller -> IBLL,MODEL,DI

Web -> Controller,MODEL

3.T4模版生成业务层和数据层接口

IDAL.tt

IDAL.tt<#@ template language="C#" debug="false" hostspecific="true"#><#@ include file="EF.Utility.CS.ttinclude"#><#@ output extension=".cs"#>  <#CodeGenerationTools code = new CodeGenerationTools(this);MetadataLoader loader = new MetadataLoader(this);CodeRegion region = new CodeRegion(this, 1);MetadataTools ef = new MetadataTools(this);string inputFile = @"..\MODEL\OuOA.edmx";EdmItemCollection ItemCollection = loader.CreateEdmItemCollection(inputFile);string namespaceName = code.VsNamespaceSuggestion();EntityFrameworkTemplateFileManager fileManager = EntityFrameworkTemplateFileManager.Create(this);#>using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace IDAL{<#// Emit Entity Typesforeach (EntityType entity in ItemCollection.GetItems<EntityType>().OrderBy(e => e.Name)){    //fileManager.StartNewFile(entity.Name + "RepositoryExt.cs");    //BeginNamespace(namespaceName, code);    #>    public partial interface I<#=entity.Name#>BLL : IBaseDAL<MODEL.<#=entity.Name#>>    {    }<#}#>}

MVC - 17.OA项目