asp.net三层架构详解
一、数据库
/*
==============================================================
*/
/* DBMS name: Microsoft SQL Server 2000 */
/* ============================================================== */
if exists ( select 1
from sysobjects
where id = object_id( ' newsContent ')
and type = ' U ')
drop table newsContent
go
/* ============================================================== */
/* Table: newsContent */
/* ============================================================== */
create table newsContent (
ID int identity( 1, 1) primary key,
Title nvarchar( 50) not null,
Content ntext not null,
AddDate datetime not null,
CategoryID int not null
)
go
/* DBMS name: Microsoft SQL Server 2000 */
/* ============================================================== */
if exists ( select 1
from sysobjects
where id = object_id( ' newsContent ')
and type = ' U ')
drop table newsContent
go
/* ============================================================== */
/* Table: newsContent */
/* ============================================================== */
create table newsContent (
ID int identity( 1, 1) primary key,
Title nvarchar( 50) not null,
Content ntext not null,
AddDate datetime not null,
CategoryID int not null
)
go
二、项目文件架构
实现步骤为：4-3-6-5-2-1
|
ID |
项目 |
描述 |
用途 |
项目引用关系 |
实例所需文件 |
相关方法 |
|
1 |
Web |
表现层 |
Web页和控件 |
引用BLL |
WebUI.aspx WebUI.aspx.cs |
GetContent() |
|
2 |
BLL |
业务逻辑层 |
业务逻辑组件 |
引用 IDAL，Model，使用DALFactory创建实例 |
Content.cs |
ContentInfo GetContentInfo(int id) |
|
3 |
IDAL |
数据访问层接口定义 |
每个DAL实现都要实现的一组接口 |
引用 Model |
IContent.cs |
ContentInfo GetContentInfo(int id) |
|
4 |
Model |
业务实体 |
传递各种数据的容器 |
无引用 |
ContentInfo.cs |
|
|
5 |
DALFactory |
数据层的抽象工厂 |
创建反射，用来确定加载哪一个数据库访问程序集的类 |
引用IDAL，通过读取web.config里设置的程序集，加载类的实例，返回给BLL使用。 |
Content.cs |
IDAL.Icontent create() |
|
6 |
SQLServerDAL |
SQLServer数据访问层 |
Microsoft SQL Server特定的Pet Shop DAL实现，使用了IDAL接口 |
引用 Model和IDAL，被DALFactory加载的程序集，实现接口里的方法。 |
SqlHelper.cs
Content.cs |
SqlDataReader ExecuteReader() PrepareCommand() ContentInfo GetContentInfo(int id) |
|
OracleDAL |
Oracle数据访问层 | |||||
|
7 |
DBUtility |
数据库访问组件基础类 |
GetSqlServerConnectionString得到数据库连接字符串，也可省去该项目，在SQLServerDAL.SqlHelper中用static readonly string SqlConnectionString代替。 |
无引用 |
|
|
实现步骤过程
1、创建Model，实现业务实体。
2、创建IDAL，实现接口。
3、创建SQLServerDAL，实现接口里的方法。
4、增加web.config里的配置信息，为SQLServerDAL的程序集。
5、创建DALFactory，返回程序集的指定类的实例。
6、创建BLL，调用DALFactory，得到程序集指定类的实例，完成数据操作方法。
7、创建WEB，调用BLL里的数据操作方法。
注意：
1、web.config里的程序集名称必须与SQLServerDAL里的输出程序集名称一致。
2、DALFactory里只需要一个DataAccess类，可以完成创建所有的程序集实例。
3、项目创建后，注意修改各项目的默认命名空间和程序集名称。
4、注意修改解决方案里的项目依赖。
5、注意在解决方案里增加各项目引用。
三、各层间的访问过程
1、传入值，将值进行类型转换(为整型)。
2、创建BLL层的content.cs对象c，通过对象c访问BLL层的方法GetContentInfo(ID)调用BLL层。
3、BLL层方法GetContentInfo(ID)中取得数据访问层SQLServerDAL的实例,实例化IDAL层的接口对象dal，这个对象是由工厂层DALFactory创建的，然后返回IDAL层传入值所查找的内容的方法dal.GetContentInfo(id)。
4、数据工厂通过web.config配置文件中给定的webdal字串访问SQLServerDAL层，返回一个完整的调用SQLServerDAL层的路径给 BLL层。
5、到此要调用SQLServerDAL层，SQLServerDAL层完成赋值Model层的对象值为空，给定一个参数，调用SQLServerDAL层的SqlHelper的ExecuteReader方法,读出每个字段的数据赋值给以定义为空的Model层的对象。
6、SqlHelper执行sql命令，返回一个指定连接的数据库记录集，在这里需要引用参数类型，提供为打开连接命令执行做好准备PrepareCommand。
7、返回Model层把查询得到的一行记录值赋值给SQLServerDAL层的引入的Model层的对象ci，然后把这个对象返回给BLL。
8、回到Web层的BLL层的方法调用,把得到的对象值赋值给Lable标签，在前台显示给界面
四、项目中的文件清单
1、DBUtility项目
(1)connectionInfo.cs
using System;
using System.Configuration;
namespace Utility
{
/// <summary>
/// ConnectionInfo 的摘要说明。
/// </summary>
public class ConnectionInfo
{
public static string GetSqlServerConnectionString()
{
return ConfigurationSettings.AppSettings[ " SQLConnString "];
}
}
}
using System.Configuration;
namespace Utility
{
/// <summary>
/// ConnectionInfo 的摘要说明。
/// </summary>
public class ConnectionInfo
{
public static string GetSqlServerConnectionString()
{
return ConfigurationSettings.AppSettings[ " SQLConnString "];
}
}
}
2、SQLServerDAL项目
（1）SqlHelper.cs抽象类
using System;
using System.Data;
using System.Data.SqlClient;
using DBUtility;
namespace SQLServerDAL
{
/// <summary>
/// SqlHelper 的摘要说明。
/// </summary>
public abstract class SqlHelper
{
public static readonly string CONN_STR = ConnectionInfo.GetSqlServerConnectionString();
/// <summary>
/// 用提供的函数，执行SQL命令，返回一个从指定连接的数据库记录集
/// </summary>
/// <remarks>
/// 例如：
/// SqlDataReader r = ExecuteReader(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connectionString"> SqlConnection有效的SQL连接字符串 </param>
/// <param name="commandType"> CommandType：CommandType.Text、CommandType.StoredProcedure </param>
/// <param name="commandText"> SQL语句或存储过程 </param>
/// <param name="commandParameters"> SqlParameter[]参数数组 </param>
/// <returns> SqlDataReader：执行结果的记录集 </returns>
public static SqlDataReader ExecuteReader( string connString, CommandType cmdType, string cmdText, params SqlParameter[] cmdParms)
{
SqlCommand cmd = new SqlCommand();
SqlConnection conn = new SqlConnection(connString);
// 我们在这里用 try/catch 是因为如果这个方法抛出异常，我们目的是关闭数据库连接，再抛出异常，
// 因为这时不会有DataReader存在，此后commandBehaviour.CloseConnection将不会工作。
try
{
PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms);
SqlDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
cmd.Parameters.Clear();
return rdr;
}
catch
{
conn.Close();
throw;
}
}
/// <summary>
/// 为执行命令做好准备：打开数据库连接，命令语句，设置命令类型（SQL语句或存储过程），函数语取。
/// </summary>
/// <param name="cmd"> SqlCommand 组件 </param>
/// <param name="conn"> SqlConnection 组件 </param>
/// <param name="trans"> SqlTransaction 组件，可以为null </param>
/// <param name="cmdType"> 语句类型：CommandType.Text、CommandType.StoredProcedure </param>
/// <param name="cmdText"> SQL语句，可以为存储过程 </param>
/// <param name="cmdParms"> SQL参数数组 </param>
private static void PrepareCommand(SqlCommand cmd, SqlConnection conn, SqlTransaction trans, CommandType cmdType, string cmdText, SqlParameter[] cmdParms)
{
if (conn.State != ConnectionState.Open)
conn.Open();
cmd.Connection = conn;
cmd.CommandText = cmdText;
if (trans != null)
cmd.Transaction = trans;
cmd.CommandType = cmdType;
if (cmdParms != null)
{
foreach (SqlParameter parm in cmdParms)
cmd.Parameters.Add(parm);
}
}
}
}
using System.Data;
using System.Data.SqlClient;
using DBUtility;
namespace SQLServerDAL
{
/// <summary>
/// SqlHelper 的摘要说明。
/// </summary>
public abstract class SqlHelper
{
public static readonly string CONN_STR = ConnectionInfo.GetSqlServerConnectionString();
/// <summary>
/// 用提供的函数，执行SQL命令，返回一个从指定连接的数据库记录集
/// </summary>
/// <remarks>
/// 例如：
/// SqlDataReader r = ExecuteReader(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connectionString"> SqlConnection有效的SQL连接字符串 </param>
/// <param name="commandType"> CommandType：CommandType.Text、CommandType.StoredProcedure </param>
/// <param name="commandText"> SQL语句或存储过程 </param>
/// <param name="commandParameters"> SqlParameter[]参数数组 </param>
/// <returns> SqlDataReader：执行结果的记录集 </returns>
public static SqlDataReader ExecuteReader( string connString, CommandType cmdType, string cmdText, params SqlParameter[] cmdParms)
{
SqlCommand cmd = new SqlCommand();
SqlConnection conn = new SqlConnection(connString);
// 我们在这里用 try/catch 是因为如果这个方法抛出异常，我们目的是关闭数据库连接，再抛出异常，
// 因为这时不会有DataReader存在，此后commandBehaviour.CloseConnection将不会工作。
try
{
PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms);
SqlDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
cmd.Parameters.Clear();
return rdr;
}
catch
{
conn.Close();
throw;
}
}
/// <summary>
/// 为执行命令做好准备：打开数据库连接，命令语句，设置命令类型（SQL语句或存储过程），函数语取。
/// </summary>
/// <param name="cmd"> SqlCommand 组件 </param>
/// <param name="conn"> SqlConnection 组件 </param>
/// <param name="trans"> SqlTransaction 组件，可以为null </param>
/// <param name="cmdType"> 语句类型：CommandType.Text、CommandType.StoredProcedure </param>
/// <param name="cmdText"> SQL语句，可以为存储过程 </param>
/// <param name="cmdParms"> SQL参数数组 </param>
private static void PrepareCommand(SqlCommand cmd, SqlConnection conn, SqlTransaction trans, CommandType cmdType, string cmdText, SqlParameter[] cmdParms)
{
if (conn.State != ConnectionState.Open)
conn.Open();
cmd.Connection = conn;
cmd.CommandText = cmdText;
if (trans != null)
cmd.Transaction = trans;
cmd.CommandType = cmdType;
if (cmdParms != null)
{
foreach (SqlParameter parm in cmdParms)
cmd.Parameters.Add(parm);
}
}
}
}
（2）Content.cs类
using System;
using System.Data;
using System.Data.SqlClient;
using Model;
using IDAL;
namespace SQLServerDAL
{
/// <summary>
/// Content 的摘要说明。
/// </summary>
public class Content:IContent
{
private const string PARM_ID = " @ID ";
private const string SQL_SELECT_CONTENT = " Select ID, Title, Content, AddDate, CategoryID From newsContent Where ID = @ID ";
public ContentInfo GetContentInfo( int id)
{
// 创意文章内容类
ContentInfo ci = null;
// 创建一个参数
SqlParameter parm = new SqlParameter(PARM_ID, SqlDbType.BigInt, 8);
// 赋上ID值
parm.Value = id;
using(SqlDataReader sdr = SqlHelper.ExecuteReader(SqlHelper.CONN_STR, CommandType.Text, SQL_SELECT_CONTENT, parm))
{
if(sdr.Read())
{
ci = new ContentInfo(sdr.GetInt32( 0),sdr.GetString( 1), sdr.GetString( 2),
sdr.GetDateTime( 3), sdr.GetInt32( 4), sdr.GetInt32( 5), sdr.GetString( 6));
}
}
return ci;
}
}
}
using System.Data;
using System.Data.SqlClient;
using Model;
using IDAL;
namespace SQLServerDAL
{
/// <summary>
/// Content 的摘要说明。
/// </summary>
public class Content:IContent
{
private const string PARM_ID = " @ID ";
private const string SQL_SELECT_CONTENT = " Select ID, Title, Content, AddDate, CategoryID From newsContent Where ID = @ID ";
public ContentInfo GetContentInfo( int id)
{
// 创意文章内容类
ContentInfo ci = null;
// 创建一个参数
SqlParameter parm = new SqlParameter(PARM_ID, SqlDbType.BigInt, 8);
// 赋上ID值
parm.Value = id;
using(SqlDataReader sdr = SqlHelper.ExecuteReader(SqlHelper.CONN_STR, CommandType.Text, SQL_SELECT_CONTENT, parm))
{
if(sdr.Read())
{
ci = new ContentInfo(sdr.GetInt32( 0),sdr.GetString( 1), sdr.GetString( 2),
sdr.GetDateTime( 3), sdr.GetInt32( 4), sdr.GetInt32( 5), sdr.GetString( 6));
}
}
return ci;
}
}
}
3、Model项目
（1）contentInfo.cs
using System;
namespace Model
{
/// <summary>
/// Class1 的摘要说明。
/// </summary>
public class ContentInfo
{
private int _ID;
private string _Content;
private string _Title;
private string _From;
private DateTime _AddDate;
private int _clsID;
private int _tmpID;
/// <summary>
/// 文章内容构造函数
/// </summary>
/// <param name="id"> 文章流水号ID </param>
/// <param name="content"> 文章内容 </param>
/// <param name="title"> 文章标题 </param>
/// <param name="from"> 文章来源 </param>
/// <param name="clsid"> 文章的分类属性ID </param>
/// <param name="tmpid"> 文章的模板属性ID </param>
public ContentInfo( int id, string title, string content, string from,DateTime addDate, int clsid, int tmpid )
{
this._ID = id;
this._Content = content;
this._Title = title;
this._From = from;
this._AddDate = addDate;
this._clsID = clsid;
this._tmpID = tmpid;
}
// 属性
public int ID
{
get { return _ID; }
}
public string Content
{
get { return _Content; }
}
public string Title
{
get { return _Title; }
}
public string From
{
get { return _From; }
}
public DateTime AddDate
{
get { return _AddDate; }
}
public int ClsID
{
get { return _clsID; }
}
public int TmpID
{
get { return _tmpID; }
}
}
}
namespace Model
{
/// <summary>
/// Class1 的摘要说明。
/// </summary>
public class ContentInfo
{
private int _ID;
private string _Content;
private string _Title;
private string _From;
private DateTime _AddDate;
private int _clsID;
private int _tmpID;
/// <summary>
/// 文章内容构造函数
/// </summary>
/// <param name="id"> 文章流水号ID </param>
/// <param name="content"> 文章内容 </param>
/// <param name="title"> 文章标题 </param>
/// <param name="from"> 文章来源 </param>
/// <param name="clsid"> 文章的分类属性ID </param>
/// <param name="tmpid"> 文章的模板属性ID </param>
public ContentInfo( int id, string title, string content, string from,DateTime addDate, int clsid, int tmpid )
{
this._ID = id;
this._Content = content;
this._Title = title;
this._From = from;
this._AddDate = addDate;
this._clsID = clsid;
this._tmpID = tmpid;
}
// 属性
public int ID
{
get { return _ID; }
}
public string Content
{
get { return _Content; }
}
public string Title
{
get { return _Title; }
}
public string From
{
get { return _From; }
}
public DateTime AddDate
{
get { return _AddDate; }
}
public int ClsID
{
get { return _clsID; }
}
public int TmpID
{
get { return _tmpID; }
}
}
}
4、IDAL项目
（1）Icontent.cs
using System;
using Model;
namespace IDAL
{
/// <summary>
/// 文章内容操作接口
/// </summary>
public interface IContent
{
/// <summary>
/// 取得文章的内容。
/// </summary>
/// <param name="id"> 文章的ID </param>
/// <returns></returns>
ContentInfo GetContentInfo( int id);
}
}
using Model;
namespace IDAL
{
/// <summary>
/// 文章内容操作接口
/// </summary>
public interface IContent
{
/// <summary>
/// 取得文章的内容。
/// </summary>
/// <param name="id"> 文章的ID </param>
/// <returns></returns>
ContentInfo GetContentInfo( int id);
}
}
5、DALFactory项目
（1）Content.cs
using System;
using System.Reflection;
using System.Configuration;
using IDAL;
namespace DALFactory
{
/// <summary>
/// 工产模式实现文章接口。
/// </summary>
public class Content
{
public static IDAL.IContent Create()
{
// 这里可以查看 DAL 接口类。
string path = System.Configuration.ConfigurationSettings.AppSettings[ " WebDAL "].ToString();
string className = path+ " .Content ";
// 用配置文件指定的类组合
return (IDAL.IContent)Assembly.Load(path).CreateInstance(className);
}
}
}
using System.Reflection;
using System.Configuration;
using IDAL;
namespace DALFactory
{
/// <summary>
/// 工产模式实现文章接口。
/// </summary>
public class Content
{
public static IDAL.IContent Create()
{
// 这里可以查看 DAL 接口类。
string path = System.Configuration.ConfigurationSettings.AppSettings[ " WebDAL "].ToString();
string className = path+ " .Content ";
// 用配置文件指定的类组合
return (IDAL.IContent)Assembly.Load(path).CreateInstance(className);
}
}
}
6、BLL项目
（1）Content.cs
using System;
using Model;
using IDAL;
namespace BLL
{
/// <summary>
/// Content 的摘要说明。
/// </summary>
public class Content
{
public ContentInfo GetContentInfo( int id)
{
// 取得从数据访问层取得一个文章内容实例
IContent dal = DALFactory.Content.Create();
// 用DAL查找文章内容
return dal.GetContentInfo(id);
}
}
}
using Model;
using IDAL;
namespace BLL
{
/// <summary>
/// Content 的摘要说明。
/// </summary>
public class Content
{
public ContentInfo GetContentInfo( int id)
{
// 取得从数据访问层取得一个文章内容实例
IContent dal = DALFactory.Content.Create();
// 用DAL查找文章内容
return dal.GetContentInfo(id);
}
}
}
7、Web项目
1、Web.config：
<appSettings>
<add key="SQLConnString" value="Data Source=localhost;Persist Security info=True;Initial Catalog=newsDB;User ID=sa;Password= " />
<add key="WebDAL" value="SQLServerDAL" />
</appSettings>
2、WebUI.aspx
<%@ Page language=
"
c#
" Codebehind=
"
WebUI.aspx.cs
" AutoEventWireup=
"
false
" Inherits=
"
Web.WebUI
" %>
<!DOCTYPE HTML PUBLIC " -//W3C//DTD HTML 4.0 Transitional//EN " >
<HTML>
<HEAD>
<title>WebUI</title>
<meta name= " GENERATOR " Content= " Microsoft Visual Studio .NET 7.1 ">
<meta name= " CODE_LANGUAGE " Content= " C# ">
<meta name= " vs_defaultClientScript " content= " JavaScript ">
<meta name= " vs_targetSchema " content= " http://schemas.microsoft.com/intellisense/ie5 ">
</HEAD>
<body MS_POSITIONING= " GridLayout ">
<form id= " Form1 " method= " post " runat= " server ">
<FONT " >宋体 "></FONT>
<table width= " 600 " border= " 1 ">
<tr>
<td style= " WIDTH: 173px "> </td>
<td>
<asp:Label id= " lblTitle " runat= " server "></asp:Label></td>
</tr>
<tr>
<td style= " WIDTH: 173px; HEIGHT: 22px "> </td>
<td style= " HEIGHT: 22px ">
<asp:Label id= " lblDataTime " runat= " server "></asp:Label></td>
</tr>
<tr>
<td style= " WIDTH: 173px "> </td>
<td>
<asp:Label id= " lblContent " runat= " server "></asp:Label></td>
</tr>
<tr>
<td style= " WIDTH: 173px "> </td>
<td> </td>
</tr>
<tr>
<td style= " WIDTH: 173px; HEIGHT: 23px "> </td>
<td style= " HEIGHT: 23px "> </td>
</tr>
<tr>
<td style= " WIDTH: 173px "> </td>
<td> </td>
</tr>
<tr>
<td style= " WIDTH: 173px "> </td>
<td> </td>
</tr>
<tr>
<td style= " WIDTH: 173px "> </td>
<td> </td>
</tr>
<tr>
<td style= " WIDTH: 173px "> </td>
<td>
<asp:Label id= " lblMsg " runat= " server ">Label</asp:Label></td>
</tr>
</table>
</form>
</body>
</HTML>
<!DOCTYPE HTML PUBLIC " -//W3C//DTD HTML 4.0 Transitional//EN " >
<HTML>
<HEAD>
<title>WebUI</title>
<meta name= " GENERATOR " Content= " Microsoft Visual Studio .NET 7.1 ">
<meta name= " CODE_LANGUAGE " Content= " C# ">
<meta name= " vs_defaultClientScript " content= " JavaScript ">
<meta name= " vs_targetSchema " content= " http://schemas.microsoft.com/intellisense/ie5 ">
</HEAD>
<body MS_POSITIONING= " GridLayout ">
<form id= " Form1 " method= " post " runat= " server ">
<FONT " >宋体 "></FONT>
<table width= " 600 " border= " 1 ">
<tr>
<td style= " WIDTH: 173px "> </td>
<td>
<asp:Label id= " lblTitle " runat= " server "></asp:Label></td>
</tr>
<tr>
<td style= " WIDTH: 173px; HEIGHT: 22px "> </td>
<td style= " HEIGHT: 22px ">
<asp:Label id= " lblDataTime " runat= " server "></asp:Label></td>
</tr>
<tr>
<td style= " WIDTH: 173px "> </td>
<td>
<asp:Label id= " lblContent " runat= " server "></asp:Label></td>
</tr>
<tr>
<td style= " WIDTH: 173px "> </td>
<td> </td>
</tr>
<tr>
<td style= " WIDTH: 173px; HEIGHT: 23px "> </td>
<td style= " HEIGHT: 23px "> </td>
</tr>
<tr>
<td style= " WIDTH: 173px "> </td>
<td> </td>
</tr>
<tr>
<td style= " WIDTH: 173px "> </td>
<td> </td>
</tr>
<tr>
<td style= " WIDTH: 173px "> </td>
<td> </td>
</tr>
<tr>
<td style= " WIDTH: 173px "> </td>
<td>
<asp:Label id= " lblMsg " runat= " server ">Label</asp:Label></td>
</tr>
</table>
</form>
</body>
</HTML>
3、WebUI.aspx.cs后台调用显示：
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using BLL;
using Model;
namespace myWeb
{
/// <summary>
/// WebForm1 的摘要说明。
/// </summary>
public class WebUI : System.Web.UI.Page
{
protected System.Web.UI.WebControls.Label lblTitle;
protected System.Web.UI.WebControls.Label lblDataTime;
protected System.Web.UI.WebControls.Label lblContent;
protected System.Web.UI.WebControls.Label lblMsg;
private ContentInfo ci ;
private void Page_Load( object sender, System.EventArgs e)
{
if(!Page.IsPostBack)
{
GetContent( " 1 ");
}
}
private void GetContent( string id)
{
int ID = WebComponents.CleanString.GetInt(id);
Content c = new Content();
ci = c.GetContentInfo(ID);
if(ci!= null)
{
this.lblTitle.Text = ci.Title;
this.lblDataTime.Text = ci.AddDate.ToString( " yyyy-MM-dd ");
this.lblContent.Text = ci.Content;
}
else
{
this.lblMsg.Text = " 没有找到这篇文章 ";
}
}
#region Web 窗体设计器生成的代码
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
//
InitializeComponent();
base.OnInit(e);
}
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.Load += new System.EventHandler( this.Page_Load);
}
#endregion
}
}
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using BLL;
using Model;
namespace myWeb
{
/// <summary>
/// WebForm1 的摘要说明。
/// </summary>
public class WebUI : System.Web.UI.Page
{
protected System.Web.UI.WebControls.Label lblTitle;
protected System.Web.UI.WebControls.Label lblDataTime;
protected System.Web.UI.WebControls.Label lblContent;
protected System.Web.UI.WebControls.Label lblMsg;
private ContentInfo ci ;
private void Page_Load( object sender, System.EventArgs e)
{
if(!Page.IsPostBack)
{
GetContent( " 1 ");
}
}
private void GetContent( string id)
{
int ID = WebComponents.CleanString.GetInt(id);
Content c = new Content();
ci = c.GetContentInfo(ID);
if(ci!= null)
{
this.lblTitle.Text = ci.Title;
this.lblDataTime.Text = ci.AddDate.ToString( " yyyy-MM-dd ");
this.lblContent.Text = ci.Content;
}
else
{
this.lblMsg.Text = " 没有找到这篇文章 ";
}
}
#region Web 窗体设计器生成的代码
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
//
InitializeComponent();
base.OnInit(e);
}
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.Load += new System.EventHandler( this.Page_Load);
}
#endregion
}
}
4、WebComponents项目
（1）CleanString.cs
using System;
using System.Text;
namespace myWeb.WebComponents
{
/// <summary>
/// CleanString 的摘要说明。
/// </summary>
public class CleanString
{
public static int GetInt( string inputString)
{
try
{
return Convert.ToInt32(inputString);
}
catch
{
return 0;
}
}
public static string InputText( string inputString, int maxLength)
{
StringBuilder retVal = new StringBuilder();
// check incoming parameters for null or blank string
if ((inputString != null) && (inputString != String.Empty))
{
inputString = inputString.Trim();
// chop the string incase the client-side max length
// fields are bypassed to prevent buffer over-runs
if (inputString.Length > maxLength)
inputString = inputString.Substring( 0, maxLength);
// convert some harmful symbols incase the regular
// expression validators are changed
for ( int i = 0; i < inputString.Length; i++)
{
switch (inputString[i])
{
case ' " ':
retVal.Append( " " ");
break;
case ' < ':
retVal.Append( " < ");
break;
case ' > ':
retVal.Append( " > ");
break;
default:
retVal.Append(inputString[i]);
break;
}
}
// Replace single quotes with white space
retVal.Replace( " ' ", " ");
}
return retVal.ToString();
}
}
}
using System.Text;
namespace myWeb.WebComponents
{
/// <summary>
/// CleanString 的摘要说明。
/// </summary>
public class CleanString
{
public static int GetInt( string inputString)
{
try
{
return Convert.ToInt32(inputString);
}
catch
{
return 0;
}
}
public static string InputText( string inputString, int maxLength)
{
StringBuilder retVal = new StringBuilder();
// check incoming parameters for null or blank string
if ((inputString != null) && (inputString != String.Empty))
{
inputString = inputString.Trim();
// chop the string incase the client-side max length
// fields are bypassed to prevent buffer over-runs
if (inputString.Length > maxLength)
inputString = inputString.Substring( 0, maxLength);
// convert some harmful symbols incase the regular
// expression validators are changed
for ( int i = 0; i < inputString.Length; i++)
{
switch (inputString[i])
{
case ' " ':
retVal.Append( " " ");
break;
case ' < ':
retVal.Append( " < ");
break;
case ' > ':
retVal.Append( " > ");
break;
default:
retVal.Append(inputString[i]);
break;
}
}
// Replace single quotes with white space
retVal.Replace( " ' ", " ");
}
return retVal.ToString();
}
}
}
