基于CodeSmith的MVC开发框架构思

出处:  http://blog.csdn.net/Anckly/archive/2006/10/16/1336142.aspx

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
... {
    /**//// 

    /// CodeSmith的DAL模板的代码类
    /// 

    public class DalCode
    ...{
        //表
        private TableSchema Table;

        /**//// 

        /// 构造函数
        /// 

        /// 
        public DalCode(SchemaExplorer .TableSchema table)
        ...{
            Table = table;
        }
        
        /**//// 

        /// 获取Insert方法所需字段名
        /// 

        /// 
        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;
        }

        /**//// 

        /// 获取Delete方法所需字段名
        /// 

        /// 
        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;
        }

        /**//// 

        /// 获取Update方法所需字段名
        /// 

        /// 
        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;
        }

        /**//// 

        /// 获取Select方法所需字段名
        /// 

        /// 
        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;
        }

        /**//// 

        /// 检查字段是否为标识符
        /// 

        /// 
        /// 
        private bool IsIdentity(ColumnSchema cs)
        ...{
            return (bool)cs.ExtendedProperties["CS_IsIdentity"].Value;
        }

        /**//// 

        /// 检查字段是否有默认值
        /// 

        /// 
        /// 
        private bool IsDefault(ColumnSchema cs)
        ...{
            if ((String)cs.ExtendedProperties["CS_Default"].Value == "")
            ...{
                return false;
            }

            return true;
        }

        /**//// 

        /// 将数据类型转换成SQL数据类型
        /// 

        /// 
        /// 
        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  %>
... {
    /**//// 

    /// 作用:<%= Description %>
    /// 作者:<%= Author %>
    /// 日期:<%= DateTime.Now.ToString() %>
    ///

    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%>";
        
        /**//// 

        /// INSERT
        /// 

        /// 
        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;
        }
        
        /**//// 

        /// 获取SELECT操作的SQL参数
        /// 

        /// 
        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.

Trackback: http://tb.blog.csdn.net/TrackBack.aspx?PostId=1336142

[ 收藏到我的网摘]   刘晓松发表于 2006年10月16日 06:25:00

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#     dd 发表于2006-10-16 12:18:00  IP: 61.152.173.*

建议结合现有的ORM框架如IBATIS.NET使用XML方式定义中间文件,再由中间文件产生各层代码

#     ddee 发表于2006-10-16 14:30:00  IP: 218.206.7.*

嗯，使用ibatis生成sql较直接使用codesmith更加有益，因为这两者功能较为重复了，而且效率也是很大的因素 其实建议看看monorail，其中的nvelocity的脚本引擎可以用codesmith代替，但是两者的确定点是效率

#      Wisdom的博客 发表于2006-10-16 21:30:00  IP: 218.66.91.*

建议看看新一代的软件方案： CodeAuto + NObject/DObject http://www.macrobject.com