工欲善其事，必先利其器：分享一套Code Smith 搭建N层架构模板
开篇
平常开发时，由于冗余代码过多，程序员做重复的工作过多势必会影响开发效率。倘若对重复性代码简单的复制、粘贴，虽然也能节省时间，但也需仔细一步步替换，这无疑也是一件费力的事。这时我们急需代码生成工具，根据一套Template快速生成我们需要的代码。代码生成器原理简单，完全可以开发一套适合自己的代码生成器，一个最简单的代码生成器，有几点你需要关注下：
- 查询系统视图：INFORMATION_SCHEMA.TABLES、 INFORMATION_SCHEMA.COLUMNS 可以获得数据库中表、列的相关信息。
- 字符串的拼接：StringBuilder的使用，其AppendLine()自动换行。
- 将字符串写入文本文件：File.WriteAllText()
- 使用了部分类（partial）
- 使用可空类型：由于数据库中表中数据很有可能是NULL，可空类型使得数据从表中读取出来赋值给值类型更加兼容。
当然自己开发的代码生成器局限性很大，但对于小项目也是很好的选择。我也写过两篇代码生成器的拙文，仅供参考。
说起代码生成器，不得不说Code Smith,基于Template的编程，下面举例的NTier架构是很基础的，除了熟悉的三层架构，还生成了抽象工厂、缓存、单例、反射、存储过程等，当然这个Demo只是学习用，大家可以继续扩展，打造自己的铜墙铁壁。
Code Smith
CodeSmith 是一种语法类似于asp.net的基于模板的代码生成器，程序可以自定义模板，从而减少重复编码的劳动量，提高效率。Code Smith提供自定义Template，语法也不复杂，类似于asp.net的标识符号，<%%>、<%=%>、<script runat="template">...</script>
Code Smith API
N层架构-实体类模板-Entity Template
- 首先创建一个C# template，创建指令集，导入程序集和名称空间：
<%@ CodeTemplate Inherits="CodeTemplate" Language="C#" TargetLanguage="Text" Description="NetTiers main template." Debug="True" ResponseEncoding="UTF-8"%> <%@ Assembly Name="SchemaExplorer" %> <%@ Assembly Name="System.Design" %> <%@ Assembly Name="System.DirectoryServices" %> <%@ Assembly Name="System.Web" %> <%@ Assembly Name="System.Xml" %> <%@ Import Namespace="SchemaExplorer" %> <%@ Import NameSpace="System.IO" %> <%@ Import NameSpace="System.Text" %> <%@ Import NameSpace="System.Text.RegularExpressions" %> <%@ Import NameSpace="System.Diagnostics" %> <%@ Import NameSpace="System.Xml" %> <%@ Import NameSpace="System.Xml.Xsl" %> <%@ Import NameSpace="System.Xml.XPath" %>
- 添加属性Property：
<%--DataSourse--%> <%@ Property Name="CurrentTable" Type="SchemaExplorer.TableSchema" Default="" Optional="False" DeepLoad="True" Category="" Description="" OnChanged="" Editor="" EditorBase="" Serializer="" %> <%@ Property Name="RootNamespace" Default="MyOffice.Models" Type="System.String" Category="Context" Description="TargetTable that the object is based on." %>
- 一个简单的实体类模板内容，可以这样写：
using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace <%=this.RootNamespace%>.Entity { public class <%= CurrentTable.Name%> { <% foreach(ColumnSchema col in CurrentTable.Columns) {%> public <%=col.DataType%> <%=col.Name%> {get;set;} <%}%> } }
当然生成实体类时，需要考虑可空类型，写好一个Template,以后爽歪歪:)。
N层架构-数据访问层接口模板，IDao Template
- Script标签里可以自定义调用的方法，属性等。数据访问层接口大家肯定烂熟于心。
- 常用的CRUD方法以及主表找子表，子表找主表。
- Script里面的方法，你需要熟悉一下Code Smith的API，我在上面已经贴出了常用的API，供大家参考。
<%@ CodeTemplate Inherits="CodeTemplate" Language="C#" TargetLanguage="Text"
Description="NetTiers main template." Debug="True" ResponseEncoding="UTF-8"%>
<%@ Assembly Name="SchemaExplorer" %>
<%@ Assembly Name="System.Design" %>
<%@ Assembly Name="System.DirectoryServices" %>
<%@ Assembly Name="System.Web" %>
<%@ Assembly Name="System.Xml" %>
<%@ Import Namespace="SchemaExplorer" %>
<%@ Import NameSpace="System.IO" %>
<%@ Import NameSpace="System.Text" %>
<%@ Import NameSpace="System.Text.RegularExpressions" %>
<%@ Import NameSpace="System.Diagnostics" %>
<%@ Import NameSpace="System.Xml" %>
<%@ Import NameSpace="System.Xml.Xsl" %>
<%@ Import NameSpace="System.Xml.XPath" %>
<%-- 1. Datasource --%>
<%@ Property Name="CurrentTable" Type="SchemaExplorer.TableSchema" DeepLoad="True" Optional="False" %>
<%@ Property Name="RootNamespace" Default="MyOffice.Models" Type="System.String" Category="Context" Description="TargetTable that the object is based on." %>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using <%=this.RootNamespace%>.Model;
namespace <%=this.RootNamespace%>.IDao
{
public interface I<%= this.CurrentTable.Name %>Dao
{
int Add(Model.<%= this.CurrentTable.Name %> entity);
int Update(Model.<%= this.CurrentTable.Name %> entity);
int Delete(Model.<%= this.CurrentTable.Name %> entity);
List<Model.<%= this.CurrentTable.Name %>> LoadAllEntities();
Model.<%= this.CurrentTable.Name %> LoadByPK(<%= PKArgsForTable()%>);
#region 主表找子表
<% foreach(TableKeySchema fk in this.CurrentTable.ForeignKeys)
{
%>
List<Model.<%=this.CurrentTable.Name%>> Query_<%=this.CurrentTable.Name%>List_By<%=fk.Name%>(<%=this.FKArgsForTable(fk)%>);
<%}%>
#endregion
}
}
<script runat="template">
//方法:生成列的主键列构成的参数列表
public string PKArgsForTable()
{
string args="";
foreach(MemberColumnSchema pkCol in this.CurrentTable.PrimaryKey.MemberColumns)
{
args += string.Format("{0} {1},",pkCol.Column.DataType,pkCol.Column.Name);
}
return args.Substring(0,args.Length-1);
}
//主键在子表中的外键所包含的列的参数列表带数据类型
public string FKArgsForTable(TableKeySchema key){
string args="";
foreach(MemberColumnSchema Col in key.ForeignKeyMemberColumns)
{
args += string.Format("{1} {0},",Col.Column.Name,Col.DataType);
}
return args.Substring(0,args.Length-1);
}
</script>
N层架构-抽象工厂-AbstactFactory Template
<%@ CodeTemplate Inherits="CodeTemplate" Language="C#" TargetLanguage="Text"
Description="NetTiers main template." Debug="True" ResponseEncoding="UTF-8"%>
<%@ Assembly Name="SchemaExplorer" %>
<%@ Assembly Name="System.Design" %>
<%@ Assembly Name="System.DirectoryServices" %>
<%@ Assembly Name="System.Web" %>
<%@ Assembly Name="System.Xml" %>
<%@ Import Namespace="SchemaExplorer" %>
<%@ Import NameSpace="System.IO" %>
<%@ Import NameSpace="System.Text" %>
<%@ Import NameSpace="System.Text.RegularExpressions" %>
<%@ Import NameSpace="System.Diagnostics" %>
<%@ Import NameSpace="System.Xml" %>
<%@ Import NameSpace="System.Xml.Xsl" %>
<%@ Import NameSpace="System.Xml.XPath" %>
<%-- 1. Datasource --%>
<%@ Property Name="SourceDatabase" Type="SchemaExplorer.DatabaseSchema" DeepLoad="True" Optional="False"%>
<%@ Property Name="RootNamespace" Default="MyOffice.Models" Type="System.String" Category="Context" Description="TargetTable that the object is based on." %>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace <%=this.RootNamespace%>.AbstractFactory
{
public abstract class DaoFactory
{
<% foreach(TableSchema table in this.SourceDatabase.Tables)
{
%>
public abstract IDao.I<% = table.Name %>Dao <% = table.Name %>SqlProviderDao
{
get;
}
<%
}
%>
}
}
N层架构-DaoSqlFactory Template
<%@ CodeTemplate Inherits="CodeTemplate" Language="C#" TargetLanguage="Text"
Description="NetTiers main template." Debug="True" ResponseEncoding="UTF-8"%>
<%@ Assembly Name="SchemaExplorer" %>
<%@ Assembly Name="System.Design" %>
<%@ Assembly Name="System.DirectoryServices" %>
<%@ Assembly Name="System.Web" %>
<%@ Assembly Name="System.Xml" %>
<%@ Import Namespace="SchemaExplorer" %>
<%@ Import NameSpace="System.IO" %>
<%@ Import NameSpace="System.Text" %>
<%@ Import NameSpace="System.Text.RegularExpressions" %>
<%@ Import NameSpace="System.Diagnostics" %>
<%@ Import NameSpace="System.Xml" %>
<%@ Import NameSpace="System.Xml.Xsl" %>
<%@ Import NameSpace="System.Xml.XPath" %>
<%-- 1. Datasource --%>
<%@ Property Name="SourceDatabase" Type="SchemaExplorer.DatabaseSchema" DeepLoad="True" Optional="False"%>
<%@ Property Name="RootNamespace" Default="MyOffice.Models" Type="System.String" Category="Context" Description="TargetTable that the object is based on." %>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace <%=this.RootNamespace%>.SqlProviderDao
{
public class DaoSqlFactory : <%=this.RootNamespace%>.AbstractFactory.DaoFactory
{
<% foreach(TableSchema table in this.SourceDatabase.Tables)
{
%>
public override <%=this.RootNamespace%>.IDao.I<% = table.Name %>Dao <% = table.Name %>SqlProviderDao
{
get
{
//TODO:效率考虑,可考虑使用缓存
SqlProviderDao.<% = table.Name %>SqlProviderDao obj = System.Web.HttpContext.Current.Cache.Get("<%=this.RootNamespace%>.IDao.I<% = table.Name %>Dao") as SqlProviderDao.<% = table.Name %>SqlProviderDao;
if (obj == null)
{
var instance = new SqlProviderDao.<% = table.Name %>SqlProviderDao();
System.Web.HttpContext.Current.Cache.Add("<%=this.RootNamespace%>.IDao.I<% = table.Name %>Dao",instance , null, System.Web.Caching.Cache.NoAbsoluteExpiration, System.Web.Caching.Cache.NoSlidingExpiration, System.Web.Caching.CacheItemPriority.Normal, null);
//System.Web.HttpRuntime.Cache.Insert(
return instance;
}
return obj;
}
}
<%
}
%>
}
}
N层架构-数据访问层-SqlProviderDao Template
- 数据访问层(DAAB)可以使用微软企业级框架 Microsoft Enterprise Library
<%@ CodeTemplate Inherits="CodeTemplate" Language="C#" TargetLanguage="Text"
Description="NetTiers main template." Debug="True" ResponseEncoding="UTF-8"%>
<%@ Assembly Name="SchemaExplorer" %>
<%@ Assembly Name="System.Design" %>
<%@ Assembly Name="System.DirectoryServices" %>
<%@ Assembly Name="System.Web" %>
<%@ Assembly Name="System.Xml" %>
<%@ Import Namespace="SchemaExplorer" %>
<%@ Import NameSpace="System.IO" %>
<%@ Import NameSpace="System.Text" %>
<%@ Import NameSpace="System.Text.RegularExpressions" %>
<%@ Import NameSpace="System.Diagnostics" %>
<%@ Import NameSpace="System.Xml" %>
<%@ Import NameSpace="System.Xml.Xsl" %>
<%@ Import NameSpace="System.Xml.XPath" %>
<%-- 1. Datasource --%>
<%@ Property Name="CurrentTable" Type="SchemaExplorer.TableSchema" DeepLoad="True" Optional="False" %>
<%@ Property Name="RootNamespace" Default="MyOffice.Models" Type="System.String" Category="Context" Description="TargetTable that the object is based on." %>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Practices.EnterpriseLibrary.Data;
using System.Data.SqlClient;
using <%=this.RootNamespace%>.Model;
namespace <%=this.RootNamespace%>.SqlProviderDao
{
/// <summary>
/// 对*<%= this.CurrentTable.Name %>*操作数据库(针对SQL Server)的实现
/// </summary>
public class <%= this.CurrentTable.Name %>SqlProviderDao:IDao.I<%= this.CurrentTable.Name %>Dao
{
public int Add(Model.<%= this.CurrentTable.Name %> entity)
{
//通过DataBaseFactory获得当前数据库连接对象
Database db=DatabaseFactory.CreateDatabase();
SqlCommand cmd=db.GetStoredProcCommand("usp_<%=this.CurrentTable.Name%>_Insert") as SqlCommand;
//cmd参数赋值
<% foreach(ColumnSchema col in this.CurrentTable.Columns)
{
%>
cmd.Parameters.AddWithValue("@<%=col.Name%>",entity.<%=col.Name%>);
<%}%>
return db.ExecuteNonQuery(cmd);
}
public int Update(Model.<%= this.CurrentTable.Name %> entity)
{
//通过DataBaseFactory获得当前数据库连接对象
Database db=DatabaseFactory.CreateDatabase();
SqlCommand cmd=db.GetStoredProcCommand("usp_<%=this.CurrentTable.Name%>_Update") as SqlCommand;
//cmd参数赋值
<% foreach(ColumnSchema col in this.CurrentTable.Columns)
{
%>
cmd.Parameters.AddWithValue("@<%=col.Name%>",entity.<%=col.Name%>);
<%}%>
return db.ExecuteNonQuery(cmd);
}
public int Delete(Model.<%= this.CurrentTable.Name %> entity)
{
//根据主键进行删除数据，需要考虑出现复合主键
//通过DataBaseFactory获得当前数据库连接对象
Database db=DatabaseFactory.CreateDatabase();
SqlCommand cmd=db.GetStoredProcCommand("usp_<%=this.CurrentTable.Name%>_Delete") as SqlCommand;
//cmd参数赋值
<% foreach(MemberColumnSchema pkCol in this.CurrentTable.PrimaryKey.MemberColumns)
{
%>
cmd.Parameters.AddWithValue("@<%=pkCol.Name%>",entity.<%=pkCol.Name%>);
<%}%>
return db.ExecuteNonQuery(cmd);
}
public List<Model.<%= this.CurrentTable.Name %>> LoadAllEntities()
{
//1.通过database工厂得到当前数据库连接的对象 db
Database db = DatabaseFactory.CreateDatabase();
//2.通过db 获得一个sp构成的cmd
SqlCommand cmd = db.GetStoredProcCommand("usp_<% = this.CurrentTable.Name %>_LoadAll") as SqlCommand;
//3.通过db执行一个DBReader
SqlDataReader reader = db.ExecuteReader(cmd) as SqlDataReader;
//4.遍历DBReader,生成新的Entity对象,然后添加到List
List<Model.<%= this.CurrentTable.Name %>> entitiesList=new List<Model.<%= this.CurrentTable.Name %>>();
while(reader.Read())
{
entitiesList.Add(new Model.<%=this.CurrentTable.Name%>(){
<%=this.SetValueToProperty %>
});
}
return entitiesList;
}
public Model.<%= this.CurrentTable.Name %> LoadByPK(<%= PKArgsForTable()%>)
{
//1.通过database工厂得到当前数据库连接的对象 db
Database db = DatabaseFactory.CreateDatabase();
//2.通过db 获得一个sp构成的cmd
SqlCommand cmd = db.GetStoredProcCommand("usp_<% = this.CurrentTable.Name %>_LoadByPK") as SqlCommand;
<%foreach(MemberColumnSchema pkCol in this.CurrentTable.PrimaryKey.MemberColumns)
{%>
cmd.Parameters.AddWithValue("@<% = pkCol.Name%>", <% = pkCol.Name%>);
<%}%>
//3.通过db执行一个DBReader
SqlDataReader reader = db.ExecuteReader(cmd) as SqlDataReader;
//4.遍历DBReader,生成新的Entity对象,然后添加到List
Model.<%=this.CurrentTable.Name%> one<%=this.CurrentTable.Name%>=null;
if(reader.Read())
{
one<%=this.CurrentTable.Name%>=new <%=this.CurrentTable.Name%>(){
<%=this.SetValueToProperty %>
};
}
return one<%=this.CurrentTable.Name%>;
}
#region ,当前表是子表,主表找子表
<% foreach(TableKeySchema fk in this.CurrentTable.ForeignKeys)
{
%>
public List<Model.<%=this.CurrentTable.Name%>> Query_<%=this.CurrentTable.Name%>List_By<%=fk.Name%>(<%=this.FKArgsForTable(fk)%>)
{
Database db = DatabaseFactory.CreateDatabase();
SqlCommand cmd = db.GetStoredProcCommand("usp_<% = this.CurrentTable.Name %>_LoadBy_<%= fk.Name%>") as SqlCommand;
//赋值：传递一个ForeignKey
<%=this.SetPropertyValueByFK(fk)%>
SqlDataReader reader = db.ExecuteReader(cmd) as SqlDataReader;
List<Model.<%= this.CurrentTable.Name %>> entitiesList=new List<Model.<%= this.CurrentTable.Name %>>();
while(reader.Read())
{
entitiesList.Add(new Model.<%=this.CurrentTable.Name%>(){
<%=this.SetValueToProperty %>
});
}
return entitiesList;
}
<%}%>
#endregion
}
}
<script runat="template">
private string SetPropertyValueByFK(TableKeySchema fk)
{
StringBuilder sb=new StringBuilder();
foreach(MemberColumnSchema fkCol in fk.ForeignKeyMemberColumns)
{
sb.AppendFormat("cmd.Parameters.AddWithValue(\"@{0}\",{0});\r\n",fkCol.Column.Name);
}
return sb.ToString();
}
private string SetValueToProperty
{
get
{
string args="";
foreach(ColumnSchema col in this.CurrentTable.Columns)
{
args+=string.Format("{0}=({2})reader[\"{1}\"],",col.Name,col.Name,col.DataType);
}
return args.Substring(0,args.Length-1);
}
}
//方法:生成列的主键列构成的参数列表
public string PKArgsForTable()
{
string args="";
foreach(MemberColumnSchema pkCol in this.CurrentTable.PrimaryKey.MemberColumns)
{
args += string.Format("{0} {1},",pkCol.Column.DataType,pkCol.Column.Name);
}
return args.Substring(0,args.Length-1);
}
//主键在子表中的外键所包含的列的参数列表带数据类型
public string FKArgsForTable(TableKeySchema key){
string args="";
foreach(MemberColumnSchema Col in key.ForeignKeyMemberColumns)
{
args += string.Format("{1} {0},",Col.Column.Name,Col.DataType);
}
return args.Substring(0,args.Length-1);
}
</script>
N层架构-SP存储过程-ScriptSp Template
- 创建存储过程之前首先需要判读存储过程是否存在
<%@ CodeTemplate Inherits="CodeTemplate" Language="C#" TargetLanguage="Text"
Description="NetTiers main template." Debug="True" ResponseEncoding="UTF-8"%>
<%@ Assembly Name="SchemaExplorer" %>
<%@ Assembly Name="System.Design" %>
<%@ Assembly Name="System.DirectoryServices" %>
<%@ Assembly Name="System.Web" %>
<%@ Assembly Name="System.Xml" %>
<%@ Import Namespace="SchemaExplorer" %>
<%@ Import NameSpace="System.IO" %>
<%@ Import NameSpace="System.Text" %>
<%@ Import NameSpace="System.Text.RegularExpressions" %>
<%@ Import NameSpace="System.Diagnostics" %>
<%@ Import NameSpace="System.Xml" %>
<%@ Import NameSpace="System.Xml.Xsl" %>
<%@ Import NameSpace="System.Xml.XPath" %>
<%-- 1. Datasource --%>
<%@ Property Name="SourceDatabase" Type="SchemaExplorer.DatabaseSchema" DeepLoad="True" Optional="False" %>
--检查是否存在
use <%=this.SourceDatabase%>
go
<% foreach(TableSchema table in this.SourceDatabase.Tables){
%>
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[usp_<% = table.Name %>_Insert]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)
drop procedure [dbo].[usp_<% = table.Name %>_Insert]
GO
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[usp_<% = table.Name %>_Update]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)
drop procedure [dbo].[usp_<% = table.Name %>_Update]
GO
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[usp_<% = table.Name %>_Delete]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)
drop procedure [dbo].[usp_<% = table.Name %>_Delete]
GO
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[usp_<% = table.Name %>_LoadAll]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)
drop procedure [dbo].[usp_<% = table.Name %>_LoadAll]
GO
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[usp_<% = table.Name %>_LoadByPK]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)
drop procedure [dbo].[usp_<% = table.Name %>_LoadByPK]
GO
------------------
<% foreach(TableKeySchema pk in table.ForeignKeys){
%>
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[usp_<%= table.Name %>_LoadBy_<%= pk.Name%>]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)
drop procedure [dbo].[usp_<%= table.Name %>_LoadBy_<%= pk.Name%>]
GO
<%
}
%>
<%
}%>
--生成存储过程
<%foreach(TableSchema table in SourceDatabase.Tables)
{%>
--当前表示:<%=table.Name%>
create proc usp_<%=table.Name%>_Insert
(
<%=this.CreateAllColumnsArgs(table)%>
)
as
insert into <%=table.Name%>(<%=this.CreateAllColumnsWithoutNativeType(table)%>) values(<%=this.CreateAllColumnsArgsWithoutNativeType(table)%>);
go
--------
create proc usp_<%=table.Name%>_LoadAll
as
select <%=this.CreateAllColumnsWithoutNativeType(table)%> from <%=table.Name%>
go
--------
create proc usp_<%=table.Name%>_Delete
(
<%=this.CreatePKColumnsArgs(table)%>
)
as
Delete from <%=table.Name%>
where
<%=this.CreatePKColumnsArgsWithoutNativeTypeAppendToWhere(table)%>;
go
--------
create proc usp_<%=table.Name%>_Update
(
<%=this.CreateAllColumnsArgs(table)%>
)
as
update <%=table.Name%> set <%=this.CreateAllColumnsArgsWithoutPK(table)%> where
<%=this.CreatePKColumnsArgsWithoutNativeTypeAppendToWhere(table)%>;
go
---------------
create proc usp_<%=table.Name%>_LoadByPK
(
<%=this.CreatePKColumnsArgs(table)%>
)
as
select <%=this.CreateAllColumnsWithoutNativeType(table)%>
from
<%=table.Name%>
where
<%=this.CreatePKColumnsArgsWithoutNativeTypeAppendToWhere(table)%>
go
----------主外键关系,类的单一职责
<%foreach(TableKeySchema fk in table.ForeignKeys)
{%>
create proc usp_<%=table.Name%>_LoadBy_<%=fk.Name%>
(
<%=this.CreateFK(fk)%>
)
as
select <%=this.CreateAllColumnsWithoutNativeType(table)%> from <%=table.Name%>
where <%=this.CreateFKSetValues(fk,table)%>
go
<%}%>
<%}%>
<script runat="template">
//生成所有列的参数列表
private string CreateAllColumnsArgs(TableSchema table)
{
string args="";
foreach(ColumnSchema col in table.Columns)
{
if(col.NativeType=="varchar"|| col.NativeType=="nvarchar"||col.NativeType=="char"||col.NativeType=="nchar")
{
args+=string.Format("@{0} {1}({2}),",col.Name,col.NativeType,col.Size);
}
else
{
args+=string.Format("@{0} {1},",col.Name,col.NativeType);
}
}
return args.Substring(0,args.Length-1);
}
//生成所有列的列表，不带参数类型
private string CreateAllColumnsWithoutNativeType(TableSchema table)
{
string args="";
foreach(ColumnSchema col in table.Columns)
{
args+=string.Format("{0},",col.Name);
}
return args.Substring(0,args.Length-1);
}
//生成所有列的参数列表，不带参数类型
private string CreateAllColumnsArgsWithoutNativeType(TableSchema table)
{
string args="";
foreach(ColumnSchema col in table.Columns)
{
args+=string.Format("@{0},",col.Name);
}
return args.Substring(0,args.Length-1);
}
//生成PK的参数列表
private string CreatePKColumnsArgs(TableSchema table)
{
string args="";
foreach(ColumnSchema col in table.Columns)
{
if(col.IsPrimaryKeyMember)
{
if(col.NativeType=="varchar"||col.NativeType=="nvarchar"||col.NativeType=="char"||col.NativeType=="nchar")
{
args+=string.Format("@{0} {1}({2}),",col.Name,col.NativeType,col.Size);
}
else
{
args+=string.Format("@{0} {1},",col.Name,col.NativeType);
}
}
}
return args.Substring(0,args.Length-1);
}
//生成主键列不带参数类型Where ID=@ID and...
private string CreatePKColumnsArgsWithoutNativeTypeAppendToWhere(TableSchema table)
{
string args="";
for(int i=0;i<table.PrimaryKey.MemberColumns.Count;i++)
{
args+=string.Format("{0}=@{0}",table.PrimaryKey.MemberColumns[i].Column.Name);
if(i<table.PrimaryKey.MemberColumns.Count-1)
{
args +=string.Format(" and");
}
}
return args;
}
//非主键类型参数列表的赋值语句
private string CreateAllColumnsArgsWithoutPK(TableSchema table)
{
string args="";
foreach(ColumnSchema col in table.NonPrimaryKeyColumns)
{
args=string.Format("{0}=@{0},",col.Name);
}
if(table.NonPrimaryKeyColumns.Count==0)
{
return "";
}
return args.Substring(0,args.Length-1);
}
//主键在子表的引用外键所包含的列
private string CreateFK(TableKeySchema fk)
{
string args="";
foreach(MemberColumnSchema fkCol in fk.ForeignKeyMemberColumns)
{
if(fkCol.NativeType=="varchar"||fkCol.NativeType=="nvarchar"||fkCol.NativeType=="char"||fkCol.NativeType=="nchar")
{
args+=string.Format("@{0} {1}({2}),",fkCol.Column.Name,fkCol.Column.NativeType,fkCol.Column.Size);
}
else
{
args+=string.Format("@{0} {1},",fkCol.Column.Name,fkCol.Column.NativeType);
}
}
return args.Substring(0,args.Length-1);
}
//根据外键表查找子表中多行的Where
private string CreateFKSetValues(TableKeySchema fk,TableSchema table)
{
string args="";
foreach(MemberColumnSchema fkCol in fk.ForeignKeyMemberColumns)
{
args+=string.Format("{0}.{1}=@{1},",table.Name,fkCol.Column.Name);
}
return args.Substring(0,args.Length-1);
}
</script>
N层架构-业务逻辑层-BLLTemplate
- 业务逻辑层上一对多，多对一需要考虑清楚，还要考虑复合主键这类情况
<%@ CodeTemplate Inherits="CodeTemplate" Language="C#" TargetLanguage="Text"
Description="NetTiers main template." Debug="True" ResponseEncoding="UTF-8"%>
<%@ Assembly Name="SchemaExplorer" %>
<%@ Assembly Name="System.Design" %>
<%@ Assembly Name="System.DirectoryServices" %>
<%@ Assembly Name="System.Web" %>
<%@ Assembly Name="System.Xml" %>
<%@ Import Namespace="SchemaExplorer" %>
<%@ Import NameSpace="System.IO" %>
<%@ Import NameSpace="System.Text" %>
<%@ Import NameSpace="System.Text.RegularExpressions" %>
<%@ Import NameSpace="System.Diagnostics" %>
<%@ Import NameSpace="System.Xml" %>
<%@ Import NameSpace="System.Xml.Xsl" %>
<%@ Import NameSpace="System.Xml.XPath" %>
<%-- 1. Datasource --%>
<%@ Property Name="CurrentTable" Type="SchemaExplorer.TableSchema" DeepLoad="True" Optional="False" %>
<%@ Property Name="RootNamespace" Default="MyOffice.Models" Type="System.String" Category="Context" Description="TargetTable that the object is based on." %>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace <%=this.RootNamespace%>.BLL
{
public class <%= CurrentTable.Name%>
{
private
AbstractFactory.DaoFactory dataFactory = DataProvider.DefaultProvider;
#region 增
public int Add(Model.<%= CurrentTable.Name%> entity)
{
//通过工厂获得当前提供程序
//用反射,通过web.config获得当前提供程序的名,再实例化
return dataFactory.<%= CurrentTable.Name%>SqlProviderDao.Add(entity);
}
public int Add(<%=this.AllArgumentsForTable()%>)
{
return this.Add(new <%=this.RootNamespace%>.Model.<%= CurrentTable.Name%>()
{
<%=this.AllPropertiesSetValueForTable()%>
});
}
#endregion
#region 改
public int Update(Model.<%= CurrentTable.Name%> entity)
{
return dataFactory.<%= CurrentTable.Name%>SqlProviderDao.Update(entity);
}
public int Update(<%=this.AllArgumentsForTable()%>)
{
return this.Update(new <%=this.RootNamespace%>.Model.<%= CurrentTable.Name%>()
{
<%=this.AllPropertiesSetValueForTable()%>
});
}
#endregion
#region 删
public int Delete(Model.<%= CurrentTable.Name%> entity)
{
return dataFactory.<%= CurrentTable.Name%>SqlProviderDao.Delete(entity);
}
public int Delete(<%= this.PKArgsForTable()%>)
{
return this.Delete(new <%=this.RootNamespace%>.Model.<%= CurrentTable.Name%>()
{
<%=this.PKPropertiesSetValueForTalble()%>
});
}
#endregion
#region Select
public Model.<%= CurrentTable.Name%> Get<%= CurrentTable.Name%>ByPK(<%=this.PKArgsForTable()%>)
{
return dataFactory.<%=this.CurrentTable.Name%>SqlProviderDao.LoadByPK(<%=this.PKArgsWithoutDataTypeForTable()%>);
}
public List<Model.<%= CurrentTable.Name%>> GetAll<%=this.CurrentTable.Name%>List()
{
return dataFactory.<%=this.CurrentTable.Name%>SqlProviderDao.LoadAllEntities();
}
#endregion
#region 当前表如果存在外键,找外键所在的主表
<% foreach(TableKeySchema fk in this.CurrentTable.ForeignKeys)
{%>
public Model.<%=fk.PrimaryKeyTable.Name%> FindParentBy<%=fk.Name%>(<%=this.GetFKArgs(fk)%>)
{
return this.dataFactory.<% = fk.PrimaryKeyTable.Name%>SqlProviderDao.LoadByPK(<%=GetFKArgsWithoutDataType(fk)%>);<% //= PKArgsWithoutDataTypeForTable(fk.PrimaryKeyTable)%>
}
<%}%>
#endregion
#region 主表找从表
<% foreach(TableKeySchema pk in this.CurrentTable.PrimaryKeys){
%>
//从当前表,找子表的List
public List<Model.<%= pk.ForeignKeyTable.Name%>> Get<%= pk.ForeignKeyTable.Name%>ListBy<%= pk.Name%>(<%=this.FKArgsForTable(pk)%>)
{
return this.dataFactory.<%= pk.ForeignKeyTable.Name%>SqlProviderDao.Query_<%=pk.ForeignKeyTable.Name%>List_By<%=pk.Name%>(<%=this. FKArgsForTableWithoutDataType(pk) %>);
}
<%
}
%>
#endregion
}
}
<script runat="template">
//方法:根据表,生成所有列构成的参数列表
private string AllArgumentsForTable()
{
string args="";
foreach(ColumnSchema col in CurrentTable.Columns)
{
args+=string.Format("{0} {1},",col.DataType,col.Name);
}
return args.Substring(0,args.Length-1);
}
//生成实力类时初始化属性
private string AllPropertiesSetValueForTable()
{
string args="";
foreach(ColumnSchema col in CurrentTable.Columns)
{
args+=string.Format("{0}={1},",col.Name,col.Name);
}
return args.Substring(0,args.Length-1);
}
//方法：生成列的主键列构成的参数列表
private string PKArgsForTable()
{
string args="";
foreach(MemberColumnSchema pkCol in this.CurrentTable.PrimaryKey.MemberColumns)
{
args+=string.Format("{0} {1},",pkCol.Column.DataType,pkCol.Column.Name);
}
return args.Substring(0,args.Length-1);
}
//方法:生成主键列的赋值：
public string PKPropertiesSetValueForTalble()
{
string args="";
foreach(MemberColumnSchema pkCol in this.CurrentTable.PrimaryKey.MemberColumns)
{
args+=string.Format("{0}={1},",pkCol.Column.Name,pkCol.Column.Name);
}
return args.Substring(0,args.Length-1);
}
//方法：生成主键列参数
private string PKArgsWithoutDataTypeForTable()
{
string args="";
foreach(MemberColumnSchema pkCol in this.CurrentTable.PrimaryKey.MemberColumns)
{
args+=string.Format("{0},",pkCol.Column.Name);
}
return args.Substring(0,args.Length-1);
}
private string PKArgsWithoutDataTypeForTable(TableSchema table)
{
string args="";
foreach(MemberColumnSchema pkCol in table.PrimaryKey.MemberColumns)
{
args += string.Format("{0},",pkCol.Column.Name);
}
return args.Substring(0,args.Length-1);
}
//方法：按照某个FK，取他的列构成的参数列表（天啊，难道有复合外键吗）
public string GetFKArgs(TableKeySchema fk)
{
string args="";
foreach(MemberColumnSchema fkCol in fk.ForeignKeyMemberColumns)
{
args+=string.Format("{0} {1},",fkCol.Column.DataType,fkCol.Column.Name);
}
return args.Substring(0,args.Length-1);
}
public string GetFKArgsWithoutDataType(TableKeySchema fk)
{
string args="";
foreach(MemberColumnSchema fkCol in fk.ForeignKeyMemberColumns)
{
args+=string.Format("{0},",fkCol.Column.Name);
}
return args.Substring(0,args.Length-1);
}
//主键在子表中的外键所包含的列的参数列表
public string FKArgsForTableWithoutDataType(TableKeySchema key){
string args="";
foreach(MemberColumnSchema Col in key.ForeignKeyMemberColumns)
{
args += string.Format("{0},",Col.Column.Name);
}
return args.Substring(0,args.Length-1);
}
//主键在子表中的外键所包含的列的参数列表带数据类型
public string FKArgsForTable(TableKeySchema key){
string args="";
foreach(MemberColumnSchema Col in key.ForeignKeyMemberColumns)
{
args += string.Format("{1} {0},",Col.Column.Name,Col.DataType);
}
return args.Substring(0,args.Length-1);
}
</script>
N层架构-单例模式-DefaultProvieder Template
- 单例+反射
<%@ CodeTemplate Inherits="CodeTemplate" Language="C#" TargetLanguage="Text"
Description="NetTiers main template." Debug="True" ResponseEncoding="UTF-8"%>
<%@ Assembly Name="SchemaExplorer" %>
<%@ Assembly Name="System.Design" %>
<%@ Assembly Name="System.DirectoryServices" %>
<%@ Assembly Name="System.Web" %>
<%@ Assembly Name="System.Xml" %>
<%@ Import Namespace="SchemaExplorer" %>
<%@ Import NameSpace="System.IO" %>
<%@ Import NameSpace="System.Text" %>
<%@ Import NameSpace="System.Text.RegularExpressions" %>
<%@ Import NameSpace="System.Diagnostics" %>
<%@ Import NameSpace="System.Xml" %>
<%@ Import NameSpace="System.Xml.Xsl" %>
<%@ Import NameSpace="System.Xml.XPath" %>
<%-- 1. Datasource --%>
<%@ Property Name="SourceDatabase" Type="SchemaExplorer.DatabaseSchema" DeepLoad="True" Optional="False"%>
<%@ Property Name="RootNamespace" Default="MyOffice.Models" Type="System.String" Category="Context" Description="TargetTable that the object is based on." %>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace <%=this.RootNamespace%>.BLL
{
internal class DataProvider
{
private static <%=this.RootNamespace%>.AbstractFactory.DaoFactory instance = null;
static DataProvider()
{
//.NET能保证这里的代码只执行一次
//TODO:根据web.config 动态反射实例化数据工厂的实例
//需要:提供程序的DLL文件名
// 类名(完整名称) 命名空间.类名
string dllfilename = System.Web.Configuration.WebConfigurationManager.AppSettings["DataProviderDllFile"];
string daoFactoryClassName =
System.Web.Configuration.WebConfigurationManager.AppSettings["DataProviderFactoryName"];
//抽象工厂
System.Reflection.Assembly dll = System.Reflection.Assembly.LoadFile(
System.Web.HttpContext.Current.Server.MapPath("~/DataProviders/" + dllfilename));
instance = dll.CreateInstance(daoFactoryClassName) as <%=this.RootNamespace%>.AbstractFactory.DaoFactory;
}
private DataProvider()
{
}
public static <%=this.RootNamespace%>.AbstractFactory.DaoFactory DefaultProvider
{
get
{
return instance;
}
}
}
}
N层架构-主模板-Main Template
- 添加指令集
<%@ Import NameSpace="System.Text" %> <%@ Import NameSpace="System.Text.RegularExpressions" %> <%@ Import NameSpace="System.Diagnostics" %> <%@ Import NameSpace="System.Xml" %> <%@ Import NameSpace="System.Xml.Xsl" %> <%@ Import NameSpace="System.Xml.XPath" %>
- 注册子模板
<%@ Register Name="EntityClassTemplate" Template="Eyes.Entity.cst" MergeProperties="False" ExcludeProperties="" %> <%@ Register Name="BizClassTemplate" Template="Eyes.Biz.cst" MergeProperties="False" ExcludeProperties="" %> <%@ Register Name="IDALInterfaceTemplate" Template="Eyes.IDAL.cst" MergeProperties="False" ExcludeProperties="" %> <%@ Register Name="DALFactoryTemplate" Template="Eyes.DALFactory.cst" MergeProperties="False" ExcludeProperties="" %> <%@ Register Name="DALSqlFactoryTemplate" Template="Eyes.DALSqlFactory.cst" MergeProperties="False" ExcludeProperties="" %> <%@ Register Name="SqlSPTemplate" Template="Eyes.SqlSp.cst" MergeProperties="False" ExcludeProperties="" %> <%@ Register Name="DataProvider" Template="Eyes.Provider.cst" MergeProperties="False" ExcludeProperties="" %> <%@ Register Name="DALSqlTemplate" Template="Eyes.DALSql.cst" MergeProperties="False" ExcludeProperties="" %> <%--DataSourse--%> <%@ Property Name="ChooseSourceDatabase" Type="SchemaExplorer.DatabaseSchema" DeepLoad="True" Optional="False" Category="01. Getting Started - Required" Description="Database that the tables views, and stored procedures should be based on. IMPORTANT!!! If SourceTables and SourceViews are left blank, the Entire Database will then be generated." %>
- 添加属性
<%--DataSourse--%> <%@ Property Name="ChooseSourceDatabase" Type="SchemaExplorer.DatabaseSchema" DeepLoad="True" Optional="False" Category="01. Getting Started - Required" Description="Database that the tables views, and stored procedures should be based on. IMPORTANT!!! If SourceTables and SourceViews are left blank, the Entire Database will then be generated." %> <%@ Property Name="RootNamespace" Default="Net.Itcast.CN" Type="System.String" Optional="False"%>
- 调用Script里面的创建模板方法
<%@ Property Name="RootNamespace" Default="Net.Itcast.CN" Type="System.String" Optional="False"%>
<%this.SaveEntityClasses();%>
<%this.GenerateBizClasses();%>
<%this.GenerateIDALInterface();%>
<%this.GenerateDALFactory();%>
<%this.GenerateDALSqlFactory();%>
<%this.GenerateDALSqlTemplate();%>
<%this.GenerateDataProvider();%>
<%this.GenerateSqlStoredProcedure();%>
<script runat="template">
private string templateOutputDirectory=@"C:\Users\thinkpad\Desktop\ERPSolution\ERPSolution";
[Editor(typeof(System.Windows.Forms.Design.FolderNameEditor), typeof(System.Drawing.Design.UITypeEditor))]
[Optional, NotChecked]
[Category("01. Getting Started - Required")]
[Description("The directory to output the results to.")]
[DefaultValue("")]
public string OutputDirectory
{
get
{
return templateOutputDirectory;
}
set
{
if (value.EndsWith("\\")) value = value.Substring(0, value.Length - 1);
templateOutputDirectory = value;
}
}
private void SaveEntityClasses()
{
CodeTemplate entityTemplate=new EntityClassTemplate();
foreach(TableSchema table in this.ChooseSourceDatabase.Tables)
{
entityTemplate.SetProperty("CurrentTable",table);
entityTemplate.SetProperty("RootNamespace",this.RootNamespace);
entityTemplate.RenderToFile(this.templateOutputDirectory+@"\"+this.RootNamespace+@".Model\"+table.Name+".cs",true);
Debug.WriteLine(table.Name);
}
}
private void GenerateBizClasses()
{
CodeTemplate template = new BizClassTemplate();
foreach(TableSchema table in this.ChooseSourceDatabase.Tables)
{
template.SetProperty("CurrentTable",table);
template.SetProperty("RootNamespace",this.RootNamespace);
template.RenderToFile(this.templateOutputDirectory + @"\"+this.RootNamespace+@".BLL\" + table.Name+".cs",true);
}
}
private void GenerateIDALInterface()
{
CodeTemplate template = new IDALInterfaceTemplate();
foreach(TableSchema table in this.ChooseSourceDatabase.Tables)
{
template.SetProperty("CurrentTable",table);
template.SetProperty("RootNamespace",this.RootNamespace);
template.RenderToFile(this.templateOutputDirectory + @"\"+this.RootNamespace+@".IDAL\" + "I"+table.Name+"Dao"+".cs",true);
}
}
private void GenerateDALSqlTemplate()
{
CodeTemplate template = new DALSqlTemplate();
foreach(TableSchema table in this.ChooseSourceDatabase.Tables)
{
template.SetProperty("CurrentTable",table);
template.SetProperty("RootNamespace",this.RootNamespace);
template.RenderToFile(this.templateOutputDirectory + @"\"+this.RootNamespace+@".SqlProviderDao\" + table.Name+"SqlDao"+".cs",true);
}
}
private void GenerateDALFactory()
{
CodeTemplate template = new DALFactoryTemplate();
template.SetProperty("SourceDatabase",this.ChooseSourceDatabase);
template.SetProperty("RootNamespace",this.RootNamespace);
template.RenderToFile(this.templateOutputDirectory + @"\"+this.RootNamespace+@".DaoFactory\DaoFactory.cs",true);
}
private void GenerateDataProvider()
{
CodeTemplate template = new DataProvider();
template.SetProperty("SourceDatabase",this.ChooseSourceDatabase);
template.SetProperty("RootNamespace",this.RootNamespace);
template.RenderToFile(this.templateOutputDirectory + @"\"+this.RootNamespace+@".BLL\DataProvider.cs",true);
}
private void GenerateDALSqlFactory()
{
CodeTemplate template = new DALSqlFactoryTemplate();
template.SetProperty("SourceDatabase",this.ChooseSourceDatabase);
template.SetProperty("RootNamespace",this.RootNamespace);
template.RenderToFile(this.templateOutputDirectory + @"\"+this.RootNamespace+@".SqlProviderDao\DaoSqlFactory.cs",true);
}
private void GenerateSqlStoredProcedure()
{
CodeTemplate template = new SqlSPTemplate();
template.SetProperty("SourceDatabase",this.ChooseSourceDatabase);
template.SetProperty("RootNamespace",this.RootNamespace);
template.RenderToFile(this.templateOutputDirectory + @"\"+this.RootNamespace+@".SqlSPScript\SqlSPScript.sql",true);
}
</script>
小结
上面的Ntier Tempalte不是最优化的，还有很多细节需要你考虑，比如数据类型的转换：
就像我开篇所说那样，工欲善其事，必先利其器，一套好的模板可以事半功倍，我在这儿抛砖引玉，期望于君共勉，打造属于自己的铜墙铁壁。
