基于CodeSmith的MVC开发框架构思

王朝vc·作者佚名  2006-12-05
窄屏简体版  字體: |||超大  

数据库:SQL Server 2000

Model, 即实体类,使用CodeSmith根据数据库表自动生成.这个是最常用的.

数据访问层, 最简单的增删改查操作也是使用CodeSmith根据数据库表配合SQLHelper类自动生成.

这层的设计,先贴点未完工的代码给大家参考参考.

1.DalCode.cs

using System;

using System.Collections.Generic;

using System.Text;

using CodeSmith;

using SchemaExplorer;

using CodeSmith.CustomProperties;

namespace DalCode

...{

/**//// <summary>

/// CodeSmith的DAL模板的代码类

/// </summary>

public class DalCode

...{

//表

private TableSchema Table;

/**//// <summary>

/// 构造函数

/// </summary>

/// <param name="table"></param>

public DalCode(SchemaExplorer .TableSchema table)

...{

Table = table;

}

/**//// <summary>

/// 获取Insert方法所需字段名

/// </summary>

/// <returns></returns>

public NameValueCollection GetInsertParm()

...{

NameValueCollection parm = new NameValueCollection();

foreach(ColumnSchema cs in Table .Columns)

...{

if(!IsIdentity (cs))

...{

if(!IsDefault (cs))

...{

parm.Add(cs.Name,ToSQLType (cs.DataType.ToString()));

}

}

}

return parm;

}

/**//// <summary>

/// 获取Delete方法所需字段名

/// </summary>

/// <returns></returns>

public NameValueCollection GetDeleteParm()

...{

NameValueCollection parm = new NameValueCollection();

foreach (ColumnSchema cs in Table.Columns)

...{

if (IsIdentity(cs))

...{

parm.Add(cs.Name, cs.DataType.ToString());

}

}

return parm;

}

/**//// <summary>

/// 获取Update方法所需字段名

/// </summary>

/// <returns></returns>

public NameValueCollection GetUpdateParm()

...{

NameValueCollection parm = new NameValueCollection();

foreach (ColumnSchema cs in Table.Columns)

...{

if (!IsIdentity(cs))

...{

parm.Add(cs.Name, cs.DataType.ToString());

}

}

return parm;

}

/**//// <summary>

/// 获取Select方法所需字段名

/// </summary>

/// <returns></returns>

public NameValueCollection GetSelectParm()

...{

NameValueCollection parm = new NameValueCollection();

foreach (ColumnSchema cs in Table.Columns)

...{

if (IsIdentity(cs))

...{

parm.Add(cs.Name, cs.DataType.ToString());

}

}

return parm;

}

/**//// <summary>

/// 检查字段是否为标识符

/// </summary>

/// <param name="cs"></param>

/// <returns></returns>

private bool IsIdentity(ColumnSchema cs)

...{

return (bool)cs.ExtendedProperties["CS_IsIdentity"].Value;

}

/**//// <summary>

/// 检查字段是否有默认值

/// </summary>

/// <param name="cs"></param>

/// <returns></returns>

private bool IsDefault(ColumnSchema cs)

...{

if ((String)cs.ExtendedProperties["CS_Default"].Value == "")

...{

return false;

}

return true;

}

/**//// <summary>

/// 将数据类型转换成SQL数据类型

/// </summary>

/// <param name="type"></param>

/// <returns></returns>

private string ToSQLType(string type)

...{

switch (type)

...{

case "AnsiString":

return "SqlDbType.VarChar";

break;

default :

return type;

}

}

}

}

2. dal.cst CodeSmith模板文件

<%--

Name:

Author:

Description:

--%>

<%@ CodeTemplate Language="C#" TargetLanguage="Text" ResponseEncoding="UTF-8" Description="Template description here." %>

<%@ Assembly Name="SchemaExplorer" %>

<%@ Import Namespace="SchemaExplorer" %>

<%@ Assembly Name="CodeSmith.CustomProperties" %>

<%@ Import Namespace="CodeSmith.CustomProperties" %>

<%@ Assembly Name="DalCode" %>

<%@ Import Namespace="DalCode" %>

<%@ Property Name="Table" Type="SchemaExplorer.TableSchema" Category="Context" Description="?????." %>

<%@ Property Name="NameSpace" Type="System.String" Default="Company.Product.Module" Optional="False" Category="" Description="????" %>

<%@ Property Name="Author" Type="System.String" Default="Author" Optional="False" Category="" Description="??" %>

<%@ Property Name="Description" Type="System.String" Default="Description" Optional="False" Category="" Description="Description" %>

<%@ Property Name="ClassName" Type="System.String" Default="ClassName" Optional="False" Category="" Description="??" %>

<%@ Property Name="InsertParm" Type="CodeSmith.CustomProperties.NameValueCollection" Default="" Optional="true" Category="" Description=""%>

<%@ Property Name="DeleteParm" Type="CodeSmith.CustomProperties.NameValueCollection" Default="" Optional="true" Category="" Description=""%>

<%@ Property Name="UpdateParm" Type="CodeSmith.CustomProperties.NameValueCollection" Default="" Optional="true" Category="" Description=""%>

<%@ Property Name="SelectParm" Type="CodeSmith.CustomProperties.NameValueCollection" Default="" Optional="true" Category="" Description=""%>

<%@ Property Name="ModelType" Type="System.String" Default="ModelType" Optional="False" Category="" Description="??" %>

<%@ Property Name="ModelName" Type="System.String" Default="ModelName" Optional="False" Category="" Description="??" %>

using System;

namespace <%= NameSpace %>

...{

/**//// <summary>

/// 作用:<%= Description %>

/// 作者:<%= Author %>

/// 日期:<%= DateTime.Now.ToString() %>

///</summary>

public class <%= ClassName%>

...{

<%

DalCode dal = new DalCode(Table);

InsertParm = dal.GetInsertParm();

string InsertName = InsertParm[0].Key;

string InsertValue = "@" + InsertParm[0].Key;

for(int i = 1;i < InsertParm.Keys.Count;i++)

...{

InsertName += ",";

InsertName += InsertParm[i].Key;

InsertValue += ",";

InsertValue += "@" + InsertParm[i].Key;

}

DeleteParm = dal .GetDeleteParm ();

UpdateParm = dal.GetUpdateParm ();

string UpdateString = UpdateParm[0].Key + " = @" + UpdateParm[0].Key;

for(int i = 1;i < UpdateParm.Keys.Count;i++)

...{

UpdateString += ",";

UpdateString += UpdateParm[i].Key + " = @" + UpdateParm[i].Key;

}

SelectParm = dal.GetSelectParm ();

%>

private const string SQL_INSERT_TOPIC = "INSERT INTO <%=Table.Name%> (<%=InsertName%>) VALUES(<%=InsertValue%>)";

private const string SQL_DELETE_TOPIC = "DELETE FROM <%=Table.Name%> WHERE <%=DeleteParm[0].Key%> = @<%=DeleteParm[0].Key%>";

private const string SQL_UPDATE_TOPIC = "UPDATE <%=Table.Name%> SET <%=UpdateString%> WHERE <%=DeleteParm[0].Key%> = @<%=DeleteParm[0].Key%>";

private const string SQL_SELECT_TOPIC = "SELECT * FROM <%=Table.Name%> WHERE <%=SelectParm[0].Key%> = @<%=SelectParm[0].Key%>";

/**//// <summary>

/// INSERT

/// </summary>

/// <returns></returns>

public int Insert(<%=ModelType%> <%=ModelName%>)

...{

SqlParameter[] insertParm = GetInsertParameters();

<%

for(int i = 0;i < InsertParm.Keys.Count;i++)

...{

%>

insertParm[<%=i%>].Value = <%=ModelName%>.<%=InsertParm[i].Key%>;

<%

}

%>

int val = SQLHelper.ExecuteNonQuery(SQLHelper.CONN_STRING_NON_DTC, CommandType.Text, SQL_INSERT_TOPIC, insertParm);

return val;

}

/**//// <summary>

/// 获取SELECT操作的SQL参数

/// </summary>

/// <returns></returns>

public static SqlParameter[] GetInsertParameters()

...{

SqlParameter[] parms = SQLHelper.GetCachedParameters(SQL_INSERT_TOPIC);

if (parms == null)

...{

parms = new SqlParameter[]

...{

<%

for(int i = 0;i < InsertParm.Keys.Count;i++)

...{

%>

new SqlParameter("@<%=InsertParm[i].Key%>",<%=InsertParm[i].Value%>),

<%

}

%>

};

SQLHelper.CacheParameters(SQL_INSERT_TOPIC, parms);

}

return parms;

}

}

}

设计中的作品,相当乱.

主要的只是想说个想法.

 
 
 
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