开发学院WEB开发ASP Asp.net(c#)数据库操作类 阅读

Asp.net(c#)数据库操作类

 2007-01-23 10:36:02 来源:WEB开发网   
核心提示: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 S

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.Data.SqlClient;
namespace MySQLserver
{
   /// <summary>
   /// SqlServerDataBase 的摘要说明
   /// </summary>
   public class SqlServerDataBase
   {
     PRivate string strError = null;
     private int intCount = 0;
     public SqlServerDataBase()
     {
       //
       // TODO: 在此处添加构造函数逻辑
       //
     }
     /// <summary>
     /// 公开方法DBConn,返回数据库连接
     /// </summary>
     /// <returns></returns>
     public SqlConnection DBconn()
     {
       string strConn = "Server=(local);Database=GlobalMeetings;Uid=sa;pwd=";
       try
       {
         return new SqlConnection(strConn);
       }
       catch (Exception)
       {
         return null;
       }
     }
     /// <summary>
     /// 公开属性ErrorMessage,返回错误信息
     /// </summary>
     public string ErrorMessage
     {
       get
       {
         return strError;
       }
     }

   /// <summary>
     /// 根据查询语句从数据库检索数据
     /// </summary>
     /// <param name="strSelect">查询语句</param>
     /// <param name="SqlConn">数据库连接</param>
     /// <returns>有数据则返回DataSet对象,否则返回null</returns>
     public DataSet Select(string SelectString, SqlConnection sqlConn)
     {
       strError = "";
       SqlConnection conn;
       if (sqlConn == null)
       {
         conn = DBconn();
       }
       else
       {
         conn = sqlConn;
       }
       try
       {
         //若数据库连接的当前状态是关闭的,则打开连接
         if (conn.State == ConnectionState.Closed)
         {
           conn.Open();
         }
         SqlDataAdapter mySqlDataAdapter = new SqlDataAdapter();
         SqlCommand selectCommand = new SqlCommand(SelectString, conn);
         selectCommand.CommandType = CommandType.Text;
         mySqlDataAdapter.SelectCommand = selectCommand;
         DataSet myDS = new DataSet();
         mySqlDataAdapter.Fill(myDS);
         return myDS;
       }
       catch (Exception e)
       {
         strError = "数据检索失败:" + e.Message;
         return null;
       }
       finally
       {
         if (conn.State != ConnectionState.Closed)
         {
           conn.Close();
         }
       }
     }
     /// <summary>
     /// 更新数据库
     /// </summary>
     /// <param name="UpdateString">Update Sql语句</param>
     /// <param name="SqlConn">数据库连接</param>
     /// <returns>更新成功返回true</returns>
     public bool Update(string UpdateString, SqlConnection SqlConn)
     {
       return udiDataBase(UpdateString, SqlConn);
     }
     /// <summary>
     /// 从数据库中删除数据
     /// </summary>
     /// <param name="DeleteString">Delete Sql语句</param>
     /// <param name="SqlConn">数据库连接</param>
     /// <returns>删除成功返回true</returns>
     public bool Delete(string DeleteString, SqlConnection SqlConn)
     {
       return udiDataBase(DeleteString, SqlConn);
     }
     /// <summary>
     /// 把数据插入数据库
     /// </summary>
     /// <param name="InsertString">Insert Sql语句</param>
     /// <param name="SqlConn">数据库连接</param>
     /// <returns>插入成功返回true</returns>
     public bool Insert(string InsertString, SqlConnection SqlConn)
     {
       return udiDataBase(InsertString, SqlConn);
     }
     /// <summary>
     /// 根据Sql语句更新数据库
     /// </summary>
     /// <param name="UDIString">更新语句</param>
     /// <param name="SqlConn">数据库连接</param>
     /// <returns>更新成功则返回true</returns>
     public bool udiDataBase(string UDIString, SqlConnection SqlConn)
     {
       strError = "";
       SqlConnection conn;
       if (SqlConn == null)
       {
         conn = DBconn();
       }
       else
       {
         conn = SqlConn;
       }
       try
       {
         if (conn.State == ConnectionState.Closed)
         {
           conn.Open();
         }
         SqlCommand cmd = new SqlCommand(UDIString, conn);
         cmd.CommandType = CommandType.Text;
         intCount = cmd.ExecuteNonQuery();
         return !(intCount < 1);
       }
       catch (Exception e)
       {
         strError = "更新数据库失败:" + e.Message;
         return false;
       }
       finally
       {
         if (conn.State != ConnectionState.Closed)
         {
           conn.Close();
         }
       }
     }
   }
}
 -----------------------------
两种调用方法
1、           string strUserPsw = UserPsw.Text.Trim();
           string UserPassWord = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(strUserPsw, "md5");//md5加密
           SqlServerDataBase obj = new SqlServerDataBase();
           obj.Insert("insert into asUserInfo (UserName,UserPassword,Question,Answer,CreateTime) values('" + UserName.Text.Trim() + "','" + UserPassword + "','" + Question.Text.Trim() + "','" + Answer.Text.Trim() + "','" + DateTime.Now.ToString() + "' )", null);
2、     private bool IsUsernameExist(string strUsername)
     {
       bool bRet = true;
       SqlServerDataBase db = new SqlServerDataBase();
       DataSet ds = db.Select("select * from asUserInfo where UserName = '" + strUsername + "'", null);
       if (ds == null || ds.Tables.Count == 0 || ds.Tables[0].Rows.Count == 0)
       {
         bRet = false;
       }
       else
       {
         bRet = true;
       }

     return bRet;
     }

http://blog.csdn.net/zdyguilong/archive/2007/01/22/1490250.aspx

Tags:Asp net 数据库

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