Object/DataSet Relational Mapping(对象/数据集关系映射)
2006-11-23 17:18:42 来源：WEB开发网在.Net的开发领域，您和您的公司是不是在为以下问题所困扰
1.DataSet中DataRow只能以DataTable[0].Rows[0][“Name”]的方式获取数据
2.Sql配置的不动态，不清晰的Sql拼凑
3.使用java 的ORM设计.Net，使用对象层，每一次修改都将影响反射的对象。
那么请继续看下面的文章
Object/DataSet Relational Mapping
(对象/数据集关系映射)
NickLee.ODRM模式可以很好的解决以上问题
1.DataSet中DataRow只能以DataTable[0].Rows[0][“Name”]的方式获取数据
方案：DataRow转化为序列化对象，但序列化对象只作为清晰的对象操作实体处理业务判断和数据
2.Sql配置的不动态，不清晰的Sql拼凑
方案：采用IBatisNet数据层构架，采用IBatisNet动态的SQL语法，但返回DataSet
3.使用JAVA 的ORM设计.Net，使用对象层，每一次修改都将影响反射的对象。
方案：清晰的O(对象层),无反射机制，避免每一次修改对对象层的改动。
下面做详细的说明
以下代码演示将包含在NickLee.Framework.2.0.1.2以上版本中,当然，我们只是提供一种思想，灵活的方案，仅代表TheFallAngel团队的思想。
必须引用的dll
IBatisNet(Version 1.5及其以后) with NickLee.Framework修改版本
NickLee.Web.UI(Version 2006.2.1447及其以后版本)
1. cXTM_User.cs
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
/// <summary>
/// cXTM_User.序列化
/// </summary>
[Serializable]
public class cXTM_User
{
PRivate int _dID;
private string _userName;
public cXTM_User()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
public int DID
{
get
{
return _dID;
}
set
{
_dID = value;
}
}
public string UserName
{
get
{
return _userName;
}
set
{
_userName = value;
}
}
/// <summary>
/// Propertylist中数组请定义该类中属性，并确保名称唯一性
/// 以及与XTM_User中SelectXTM_UserByKey_Test中查询名称统一
/// </summary>
public string[] Propertylist
{
get
{
return new string[] { "UserName", "DID" };
}
}
}
2. XTM_User.xml
<?xml version='1.0' encoding='UTF-8' ?>
<sqlMap namespace='XTM_User' xmlns="http://ibatis.apache.org/mapping" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<statements>
<select id='SelectXTM_UserByKey_Test' parameterClass='System.Collections.Hashtable'>
SELECT
Top 5
[DID],
[UserName],
[LoginName],
[PWD],
[LoginFlag],
[StopFlag],
[LoginTime],
[LASTUPDATE]
FROM [XTM_User]
</select>
</statements>
</sqlMap>
3. test.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="test.aspx.cs" Inherits="ODRM_test" %>
<%@ Register Assembly="NickLee.Web.UI" Namespace="NickLee.Web.UI" TagPrefix="NickLee" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Object/DataSet Relational Mapping(对象/数据集关系映射)</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<NickLee:ExDataGrid ID="ExDataGrid1" runat="server" OnItemDataBound="ExDataGrid1_ItemDataBound">
</NickLee:ExDataGrid></div>
</form>
</body>
</html>
4. test.aspx.cs
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using IBatisNet.DataMapper;
using System.Reflection;
public partial class ODRM_test : PageBase
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
DataSet set11 = Mapper.Instance().QueryForDataSet("SelectXTM_UserByKey_Test",UIhashtable);
DataTable table1 = ConvertDataTable(set11, "");
//这里为自己定义的序列化类
cXTM_User[] objModel = new cXTM_User[table1.Rows.Count];
//DataTable转化为序列化类数组
for (int y = 0; y < table1.Rows.Count; y++)
{
objModel[y] = new cXTM_User();
DataTableReturnOO(table1.Rows[y], objModel[y]);
}
//以DataSet模式绑定
ExDataGrid1.DataSource = table1;
//以序列化对象模式绑定
//ExDataGrid1.DataSource = objModel;
ExDataGrid1.DataBind();
}
}
protected void ExDataGrid1_ItemDataBound(object sender, DataGridItemEventArgs e)
{
/*
* 该部分应用范围
* 查询一条数据的修改，可以用objModel.UserName
* 而不必再使用DataTable[0].Rows[0]["UserName"]的模式
* 提高面向对象的程度，并减少业务流程部分编码
*/
if (e.Item.ItemIndex != -1)
{
cXTM_User objModel = new cXTM_User();
//如果为DataSet填充的DataGrid
if (e.Item.DataItem.GetType().FullName == "System.Data.DataRowView")
{
DataTableReturnOO((DataRow)((DataRowView)e.Item.DataItem).Row, objModel);
}
//否则认为为序列化对象填充
else
{
objModel = (cXTM_User)e.Item.DataItem;
}
}
}
/// <summary>
/// DataSet转化为序列化类函数,类定义参考cXTM_User
/// </summary>
private void DataTableReturnOO(DataRow row, cXTM_User objModel)
{
Hashtable hTable = new Hashtable();
hTable = ReturnHashtable(row);
Type entitytype = Type.GetType(objModel.GetType().AssemblyQualifiedName);
for (int j = 0; j < objModel.Propertylist.Length; j++)
{
PropertyInfo propertyinfo = entitytype.GetProperty(objModel.Propertylist[j]);
propertyinfo.SetValue(objModel, hTable[objModel.Propertylist[j]], null);
}
}
/// <summary>
/// 转换为DataTable
/// </summary>
/// <param name="Source">数据源</param>
/// <param name="DataMember">数据表名称</param>
public static DataTable ConvertDataTable(object Source, string DataMember)
{
DataTable baseTable = new DataTable();
if (Source is DataTable)
{
baseTable = (DataTable)Source;
return baseTable;
}
if (Source is DataSet)
{
DataSet set1 = (DataSet)Source;
if ((set1.Tables.Count > 1) && ((DataMember == null) || (DataMember == "")))
{
throw new Exception("If there is more than one table in your dataset, you must define the DataMember property to specify which table to use.");
}
if (set1.Tables.Count < 1)
{
throw new Exception("There are no tables in the datasource.");
}
if ((DataMember != null) && (DataMember != ""))
{
baseTable = set1.Tables[DataMember];
return baseTable;
}
else
{
baseTable = set1.Tables[0];
return baseTable;
}
}
return baseTable;
}
/// <summary>
/// 返回DataTable为哈希表键值对
/// </summary>
/// <param name="SourceTable">数据行对象</param>
/// <returns></returns>
public static Hashtable ReturnHashtable(DataRow SourceRow)
{
Hashtable hTable = new Hashtable();
IList list = SourceRow.ItemArray;
object[] tObj = new object[SourceRow.Table.Columns.Count];
for (int i = 0; i < SourceRow.Table.Columns.Count; i++)
{
tObj[SourceRow.Table.Columns.IndexOf(SourceRow.Table.Columns[i].ColumnName)] = SourceRow.Table.Columns[i].ColumnName;
}
for (int x = 0; x < list.Count; x++)
{
hTable.Add(tObj[x].ToString(), list[x]);
}
return hTable;
}
}
5. PageBase.cs
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Reflection;
using System.Text;
using System.Collections;
//namespace可要可不要
//namespace Framework.Web.Uiprocess
//{
/// <summary>
/// PageBase 的摘要说明
/// </summary>
/// <summary>
/// 页面层(表示层)基类,所有页面继承该页面
/// </summary>
public class PageBase : System.Web.UI.Page
{
#region 整个系统存在部分
private string _baseselect;
/// <summary>
/// 查询字段
/// </summary>
protected string baseselect
{
get
{
// TODO: 添加 BaseRule.OperationCode getter 实现
return _baseselect;
}
set
{
// TODO: 添加 BaseRule.OperationCode setter 实现
_baseselect = value;
}
}
/// <summary>
/// 基类哈希表,在整个系统中存在
/// </summary>
protected Hashtable baseHashtable = new Hashtable();
/// <summary>
/// 界面哈希表,获取UI工厂获取的控件和控件值
/// </summary>
protected Hashtable UIhashtable = new Hashtable();
/// <summary>
/// 出错提示,默认值""
/// </summary>
protected string errMsg = "";
/// <summary>
/// 出错状态,默认值false
/// </summary>
protected bool errState = false;
/// <summary>
/// 私有变量_UISet
/// </summary>
private DataSet _UISet = new DataSet();
/// <summary>
/// 界面层数据集
/// </summary>
protected DataSet UISet
{
get
{
// TODO: 添加 BaseRule.OperationCode getter 实现
return _UISet;
}
set
{
// TODO: 添加 BaseRule.OperationCode setter 实现
_UISet = value;
}
}
private DataTable _UITable = new DataTable();
/// <summary>
/// 界面层数据表
/// </summary>
protected DataTable UITable
{
get
{
// TODO: 添加 BaseRule.OperationCode getter 实现
return _UITable;
}
set
{
// TODO: 添加 BaseRule.OperationCode setter 实现
_UITable = value;
}
}
private string _pageTitle = "";
/// <summary>
/// 页面标题
/// </summary>
protected string pageTitle
{
get
{
// TODO: 添加 BaseRule.OperationCode getter 实现
return _pageTitle;
}
set
{
// TODO: 添加 BaseRule.OperationCode setter 实现
_pageTitle = value;
}
}
#endregion
#region 查询页面存在部分
/// <summary>
/// List页面基类哈希表
/// </summary>
protected Hashtable baseListHashtable = new Hashtable();
/// <summary>
/// 页面总数.变量.1000w、10000w数据集使用
/// </summary>
protected int pageCount;
/// <summary>
/// 记录总数.变量.1000w、10000w数据集使用
/// </summary>
protected int recordCount;
/// <summary>
/// 记录总数.属性.1000w、10000w数据集使用
/// </summary>
protected int RecordCount
{
get
{
return recordCount;
}
}
#endregion
#region 编辑页面存在部分
/// <summary>
/// Edit页面基类哈希表
/// </summary>
protected Hashtable baseEditHashtable = new Hashtable();
/// <summary>
/// Edit页面,编辑数据哈希表
/// </summary>
protected Hashtable baseEditFillHashtable = new Hashtable();
#endregion
/// <summary>
/// 构造函数
/// </summary>
public PageBase()
{
this.Load += new EventHandler(PageBase_Load);
}
private void PageBase_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
//整个流程需要的控制部分
if (session["baseHashtable"] != null)
{
//从Session中获取哈希对象列表
baseHashtable = (Hashtable)Session["baseHashtable"];
}
//编辑页面访问权限和访问控制，只在第一次载入页面的时候有效
if (Session["baseEditHashtable"] != null)
{
//获取Edit页面哈希对象列表
baseEditHashtable = (Hashtable)Session["baseEditHashtable"];
//获取完后释放对应Session对象
Session.Remove("baseEditHashtable");
}
else
{
//如果为初始状态,新增是否安全编辑状态值,默认值false,不安全
baseEditHashtable.Add("EditSafeState", false);
}
}
//查询页面访问控制
if (Session["baseListHashtable"] != null)
{
//获取Edit页面哈希对象列表
baseListHashtable = (Hashtable)Session["baseListHashtable"];
//获取完后释放对应Session对象
Session.Remove("baseListHashtable");
}
else
{
//如果为初始状态,新增是否刷新查询页面,默认值false,不刷新
baseListHashtable.Add("IsRefresh", false);
}
}
#region UI通用函数
/// <summary>
/// 抛出出错消息提示
/// </summary>
/// <param name="page">页面</param>
/// <param name="errMsg">出错消息</param>
protected void throwErrMsg(Page page, string errMsg)
{
page.Response.Write("<script>window.alert(\"" + errMsg.Replace("\"", "'") + "\");</script>");
}
/// <summary>
/// 刷新打开编辑窗体的List页面
/// </summary>
/// <param name="page">页面</param>
protected void parentPageRefresh(Page page)
{
StringBuilder scriptString = new StringBuilder();
scriptString.Append("<script language = Javascript>");
//调用Function.js中的refresh()刷新父窗体
scriptString.Append("window.opener.refresh(false,\"\");");
scriptString.Append(" window.focus();");
scriptString.Append(" window.opener=null;");
scriptString.Append(" window.close(); ");
scriptString.Append("</" + "script>");
page.Response.Write(scriptString.ToString());
}
/// <summary>
/// 重置页面
/// </summary>
/// <param name="page">页面</param>
protected void pageReset(Page page)
{
StringBuilder scriptString = new StringBuilder();
scriptString.Append("<script language = javascript>");
scriptString.Append(" this.location.reset(); ");
scriptString.Append("</" + "script>");
page.Response.Write(scriptString.ToString());
}
/// <summary>
/// js界面工厂传入后生成Hashtable
/// </summary>
/// <param name="splitStr">js界面工厂传入字符串</param>
/// <returns></returns>
public Hashtable AjaxUIFactory(string splitStr)
{
string[] fristStr = splitStr.Split(',');
Hashtable table = new Hashtable();
for (int x = 0; x < fristStr.Length; x++)
{
string[] secondStr = fristStr[x].Split('|');
if (secondStr.Length == 3)
{
//取截取后字符串和值
table.Add(secondStr[1], secondStr[2]);
}
}
return table;
}
#endregion
}
http://www.cnblogs.com/mail-ricklee/archive/2006/11/23/569270.html
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