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MVC使用T4模板生成其他类的具体实现学习笔记2

时间：2022-09-21 08:27:15 | 栏目：.NET代码 | 点击：次

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

<#@ 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 PMS.DAL;
using PMS.IDAL;
using PMS.Model;
using System;
using System.Collections.Generic;
using System.Data.Entity;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace PMS.DALFactory
{
  public partial class DBSession : IDBSession
  {
<#
// Emit Entity Types

foreach (EntityType entity in ItemCollection.GetItems<EntityType>().OrderBy(e => e.Name))
{
  //fileManager.StartNewFile(entity.Name + "RepositoryExt.cs");
  //BeginNamespace(namespaceName, code);  
#>  
    private I<#=entity.Name#>Dal _<#=entity.Name#>Dal;
    public I<#=entity.Name#>Dal <#=entity.Name#>Dal
    {
      get
      {
        if(_<#=entity.Name#>Dal == null)
        {
          _<#=entity.Name#>Dal = AbstractFactory.Create<#=entity.Name#>Dal();
        }
        return _<#=entity.Name#>Dal;
      }
      set { _<#=entity.Name#>Dal = value; }
    }
<#}#>
  }  
}

BLL层

Service.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 PMS.IBLL;
using PMS.Model;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace PMS.BLL
{
<#
// 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#>Service :BaseService<<#=entity.Name#>>,I<#=entity.Name#>Service
  {
  

     public override void SetCurrentDal()
    {
      CurrentDal = this.CurrentDbSession.<#=entity.Name#>Dal;
    }
  }  
<#}#>
  
}

BLL层

IService.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 PMS.Model;
using PMS.Model.Search;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace PMS.IBLL
{
<#
// 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#>Service : IBaseService<<#=entity.Name#>>
  {
    
  }  
<#}#>
  
}

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