Use c# to create a simple message board (1)

First of all, I would like to thank bigeagle for his help. This is also made with reference to her bbs.
The message board is divided into three modules: list message list, display detailed content, and post message
notepage.cs
namespace notpage
{
using System;
using System.Data.SQL;
using System.Data ;
using System.Collections ;

//////////////////////////////////////////////////// ////////////////////
//
// Class Name: Message Board
//
// Description: Construct a message board object
//
// date: 2000/06/06
//
// Author: God
/// ///////////////////////////////////////////////////// //////////////

///

string n_strTitle; //Subject
private string n_strAuthor; //Lecturer
private string n_strContent; //Message content

private DateTime n_dateTime; //Message time

//Attributes

public int ID
{

get

{
return n_intID ;
}
set
{
n_intID = value;
}
}

public string Title
{
get
{
return n_strTitle ;
}
set
{
n_strTitle = value;
}
}

public string Author
{
get
{
return n_strAuthor ;
}
set
{
n_strAuthor = value ;
}
}
public string Content
{
get
{
return n_strContent ;
}
set
{
n_strContent = value ;
}
}
public DateTime adddate
{

get
{
return n_dateTime;
}
set
{
n_dateTime = value;
}

}

//Constructor
public notepage()
{
//
// TODO: Add Constructor Logic here
//
this.n_intID = 0 ;
this.n_strTitle = "" ;
this.n_strAuthor = "" ;
this.n_strContent = "" ;
this.n_dateTime = System.DateTime.Now;

}

///

///
/// Get the content of the message
///
///

///
public notepage GetTopic(int a_intID)
{

//

// TODO: Add Constructor Logic here
//

//Read database
myconn myConn = new myconn();

SQLCommand myCommand = new SQLCommand() ;
myCommand.ActiveConnection = myConn ;
myCommand.CommandText = "n_GetTopicInfo" ; //Call the stored procedure
myCommand.CommandType = CommandType.StoredProcedure;

myCommand.Parameters.Add(new SQLParameter("@a_intTopicID" , SQLDataType.Int)) ;

myCommand.Parameters["@a_intTopicID"].Value = a_intID ;

notepage objNp = new notepage();
try
{

myConn.Open() ;
SQLDataReader myReader ;
myCommand.Execute(out myReader) ;
if (myReader.Read())
{
objNp.ID = (int)myReader["ID"] ;
objNp.Title = (string)myReader["Title"] ;
objNp.Author = (string)myReader["Author"] ;

objNp.Content = (string)myReader["Content"];

objNp.adddate = (DateTime)myReader["adddate"];
}

//Clear up
myReader.Close();
myConn.Close() ;

}
catch(Exception e)
{
throw(new Exception("Failed to fetch post:" + e.ToString())) ;
}
return objNp;

}

///

///
/// Purpose: to store the content of the message into the database
///
/// Use constructors to pass information
///
///

///

public bool AddTopic(notepage n_Topic)

{
//
// TODO: Add Constructor Logic here
//

//Read database
myconn myConn = new myconn();

SQLCommand myCommand = new SQLCommand() ;
myCommand.ActiveConnection = myConn ;
myCommand.CommandText = "n_addTopic" ; //调用存储过程
myCommand.CommandType = CommandType.StoredProcedure ;
myCommand.Parameters.Add(new SQLParameter("@a_strTitle" , SQLDataType.VarChar,100)) ;
myCommand.Parameters["@a_strTitle"].Value = n_Topic.Title ;

myCommand.Parameters.Add(new SQLParameter("@a_strAuthor" , SQLDataType.VarChar,50)) ;
myCommand.Parameters["@a_strAuthor"].Value = n_Topic.Author ;

myCommand.Parameters.Add(new SQLParameter("@a_strContent" , SQLDataType.VarChar,2000)) ;
myCommand.Parameters["@a_strContent"].Value = n_Topic.Content ;

try
{

myConn.Open() ;
myCommand.ExecuteNonQuery() ;

//清场

myConn.Close() ;

}
catch(Exception e)
{
throw(new Exception("取贴子失败:" + e.ToString())) ;
}
return true;

}

///

/// 取的贴子列表
///

///
/// 返回一个Topic数组
///
public ArrayList GetTopicList()
{
//定义一个forum数组做为返回值
ArrayList arrForumList =new ArrayList() ;

//从数据库中读取留言列表
myconn myConn = new myconn();
SQLCommand myCommand = new SQLCommand() ;
myCommand.ActiveConnection = myConn ;
myCommand.CommandText = "n_GetTopicList" ; //调用存储过程
myCommand.CommandType = CommandType.StoredProcedure ;

try
{
myConn.Open() ;
SQLDataReader myReader ;
myCommand.Execute(out myReader) ;

for (int i = 0 ; myReader.Read() ; i++)
{
notepage objItem = new notepage() ;
objItem.ID = myReader["ID"].ToString().ToInt32() ;
objItem.Title = myReader["Title"].ToString() ;
objItem.Author = myReader["Author"].ToString() ;
objItem.adddate = myReader["adddate"].ToString().ToDateTime();
objItem.Content = myReader["Content"].ToString();

arrForumList.Add(objItem) ;
}

//清场
myReader.Close();
myConn.Close() ;

}
catch(SQLException e)
{
throw(new Exception("数据库出错:" + e.ToString())) ;
//return null ;
}

return arrForumList ;
}

}
}

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