MVC使用T4模板生成其他类的具体实现学习笔记2

在前篇中我们已经将User类中的代码做了具体的实现，但仍然有多个实体类未实现，以后可能还会增加新的数据表，数据表结构也有可能发生变化，所以我们使用T4模板来完成类的生成，这样就算数据库表发生了改变，也会自动根据改变后的实体对类进行重新生成。

下面是数据访问层的T4模板文件 Dal.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); //EF实体文件在项目中的路径 string inputFile = @"..\\PMS.Model\\PMS.edmx"; EdmItemCollection ItemCollection = loader.CreateEdmItemCollection(inputFile); string namespaceName = code.VsNamespaceSuggestion(); EntityFrameworkTemplateFileManager fileManager = EntityFrameworkTemplateFileManager.Create(this); #> <#//这里为命名空间部分，手动更改为相应的命名空间 #> using PMS.IDAL; using PMS.Model; using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace PMS.DAL { <# // Emit Entity Types foreach (EntityType entity in ItemCollection.GetItems<EntityType>().OrderBy(e => e.Name)) { //fileManager.StartNewFile(entity.Name + "RepositoryExt.cs"); //BeginNamespace(namespaceName, code); #> public partial class <#=entity.Name#>Dal :BaseDal<<#=entity.Name#>>,I<#=entity.Name#>Dal { } <#}#> }

我们将EF实体文件路径、命名空间更改为对应的值时，Ctrl+S保存，即可生成对应的其他类型的数据访问类

其他层中也大同小异，只需要做对应的更改即可，下面我将提供相应的代码

IDAL层

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 = @"..\\PMS.Model\\PMS.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; using System.Threading.Tasks; using PMS.Model; namespace PMS.IDAL { <# // Emit Entity Types foreach (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#>Dal :IBaseDal<<#=entity.Name#>> { } <#}#> }

IDbSession.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 = @"..\\PMS.Model\\PMS.edmx"; EdmItemCollection ItemCollection = loader.CreateEdmItemCollection(inputFile); string namespaceName = code.VsNamespaceSuggestion(); EntityFrameworkTemplateFileManager fileManager = EntityFrameworkTemplateFileManager.Create(this); #> using System; using System.Collections.Generic; using System.Data.Entity; using System.Linq; using System.Text; using System.Threading.Tasks; namespace PMS.IDAL { public partial interface IDbSession { <# // Emit Entity Types foreach (EntityType entity in ItemCollection.GetItems<EntityType>().OrderBy(e => e.Name)) { //fileManager.StartNewFile(entity.Name + "RepositoryExt.cs"); //BeginNamespace(namespaceName, code); #> I<#=entity.Name#>Dal <#=entity.Name#>Dal{get;set;} <#}#> } }

DALFactory层

SimpleDalFactory.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 =@"..\\PMS.Model\\PMS.edmx"; EdmItemCollection ItemCollection = loader.CreateEdmItemCollection(inputFile); string namespaceName = code.VsNamespaceSuggestion(); EntityFrameworkTemplateFileManager fileManager = EntityFrameworkTemplateFileManager.Create(this); #> using SW.OA.IDAL; using System; using System.Collections.Generic; using System.Configuration; using System.Linq; using System.Reflection; using System.Text; using System.Threading.Tasks; namespace SW.OA.DALFactory { public partial class AbstractFactory { <# foreach (EntityType entity in ItemCollection.GetItems<EntityType>().OrderBy(e => e.Name)) { #> public static I<#=entity.Name#>Dal Create<#=entity.Name#>Dal() { string fullClassName = NameSpace + ".<#=entity.Name#>Dal"; return CreateInstance(fullClassName) as I<#=entity.Name#>Dal; } <#}#> } }

DbSession.tt