在asp.net中怎么写类啊，给点经验之谈，好不好？

是新建一个类的工程，在工程中写是吧？
如果谁能给我一个向导，或者有一个实例，那真是感激不尽啊

解决方案 »

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初学者的简单类，见笑
using System;
using System.Data;
using System.Data.OleDb;
using System.Text;
using System.Web;namespace Database
{
/// <summary>
/// OleDbDatabase 的摘要说明。
/// </summary>
public class OleDbDatabase
{

public OleDbDatabase()
{
//
// TODO: 在此处添加构造函数逻辑
//
} private string ConnString;
#region 数据库连接字符串
public string strConn
{
set
{
ConnString = value;
}
get
{
return ConnString;
}
}
#endregion #region 执行SQL命令，参数为SQL语句。返回DataSet（正常）或null（错误）
public DataSet GetDataSet(string strSelectSQL)
{
try
{
OleDbConnection Conn = new OleDbConnection(ConnString);
OleDbCommand SelCommand = new OleDbCommand(strSelectSQL,Conn);
OleDbDataAdapter objDataAdapter = new OleDbDataAdapter();
DataSet SelDataSet = new DataSet(); objDataAdapter.SelectCommand = SelCommand;
objDataAdapter.Fill(SelDataSet); return SelDataSet;
}
catch(Exception e)
{
HttpContext.Current.Response.Write("" + e.Message + " " + e.TargetSite);
HttpContext.Current.Response.Write(" 请检查GetDataSet调用参数！");
return null;
}
}
#endregion #region 执行SQL命令，参数为SQL语句。返回执行成功(true)与失败(false)
public bool CommandSQL ( string strCommandSQL)
{
try
{
OleDbConnection Conn = new OleDbConnection(ConnString);
OleDbCommand SQLCommand = new OleDbCommand(strCommandSQL,Conn);
Conn.Open(); SQLCommand.ExecuteNonQuery(); Conn.Close();
return true;
}
catch(Exception e)
{
HttpContext.Current.Response.Write("" + e.Message + " " + e.TargetSite);
HttpContext.Current.Response.Write(" 请检查CommandSQL调用参数！");
return false;
}
}
#endregion #region 执行SQL插入操作，参数值为域值二维数组、表名,返回插入成功(true)与失败(false)
public bool CommandSQL (string[,] strColumn,string TableName)
{
try
{
StringBuilder InsertSQL = new StringBuilder("insert into " + TableName + " (");
StringBuilder Column = new StringBuilder();
StringBuilder Value = new StringBuilder();
for (int i=0;i<strColumn.GetLength(0);i++)
{
if (i!= strColumn.GetLength(0)-1)
{
Column.Append ( strColumn[i,0] + ",");
Value.Append("'"+ strColumn[i,1] + "',");
}
else
{
Column.Append(strColumn[i,0]);
Value.Append("'" + strColumn[i,1] + "'");
}
} InsertSQL.Append( Column.ToString() + ")" + " values (" + Value.ToString() + ") ");

OleDbConnection Conn = new OleDbConnection(ConnString);
OleDbCommand SQLCommand = new OleDbCommand(InsertSQL.ToString(),Conn);
Conn.Open(); SQLCommand.ExecuteNonQuery(); Conn.Close(); return true;
}
catch(Exception e)
{
HttpContext.Current.Response.Write("" + e.Message + " " + e.TargetSite);
HttpContext.Current.Response.Write(" 请检查CommandSQL调用参数！");
return false;
} }
#endregion #region 执行SQL字段唯一性检查，参数为表名、列名、检查值。返回存在(true)与不存在(false)
public bool GetExsitValue ( string vTable,string vColumn,string Value)
{
try
{
string strSQL = "select " + vColumn +" from " + vTable + " where " + vColumn + "='" + Value +"'";
OleDbConnection Conn = new OleDbConnection(ConnString);
OleDbCommand SQLCommand = new OleDbCommand(strSQL,Conn);
OleDbDataReader objRead;

Conn.Open(); objRead = SQLCommand.ExecuteReader();
bool Result = objRead.HasRows; Conn.Close();
if (Result)
{
return true;
}
else
{
return false;
}
}
catch(Exception e)
{
HttpContext.Current.Response.Write("" + e.Message + " " + e.TargetSite);
HttpContext.Current.Response.Write(" 请检查GetExsitValue调用参数！");
HttpContext.Current.Response.End();
return false;
}
}
#endregion #region 执行SQL字段唯一性检查，参数为表名、列名1、检查值1、列2、检查值2。返回存在(true)与不存在(false)
public bool GetExsitValue ( string vTable,string vColumn1,string Value1,string vColumn2,string Value2)
{
try
{
string strSQL = "select " + vColumn1 +"," + vColumn2 +" from " + vTable + " where " + vColumn1 + "='" + Value1 +"' and "+ vColumn2 + "='" + Value2 + "'" ;
OleDbConnection Conn = new OleDbConnection(ConnString);
OleDbCommand SQLCommand = new OleDbCommand(strSQL,Conn);
OleDbDataReader objRead;

Conn.Open(); objRead = SQLCommand.ExecuteReader();
bool Result = objRead.HasRows; Conn.Close();
if (Result)
{
return true;
}
else
{
return false;
}
}
catch(Exception e)
{
HttpContext.Current.Response.Write("" + e.Message + " " + e.TargetSite);
HttpContext.Current.Response.Write(" 请检查GetExsitValue调用参数！");
HttpContext.Current.Response.End();
return false;
}
}
#endregion
}
}
右击项目－添加类using System;namespace asp.net_xml
{
/// <summary>
/// Class1 的摘要说明。
/// </summary>
public class Class1
{
public Class1()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
}
}
右键项目->添加类
其实就是一个class,手工写也行
在asp.net中写的都是类。除了及少数如style.css...。
只是你用没用到类的好处罢了
比如继承.重载。
我不是高手，你去问那些星星们他们肯定会给你好的答案哦