ASP.NET数据库操作类——打包

using System;   
using System.Data;   
using System.Data.SqlClient;   
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>   
/// Public 的摘要说明   
/// </summary>   
public class PublicClass   
{   //定义一个公用成员   
    public SqlConnection conn;   
    public PublicClass()   
    {   
        //   
        // TODO: 在此处添加构造函数逻辑   
        //   
    }   
    #region 建立<a href="http://lib.csdn.net/base/mysql" class='replace_word' title="MySQL知识库" target='_blank' style='color:#df3434; font-weight:bold;'>数据库</a>连接   
    public void OpenConn()   
    {   
        String strconn = System.Configuration.ConfigurationManager.AppSettings["sqlconn"].ToString();   
        conn = new SqlConnection(strconn);   
        if (conn.State.ToString().ToLower() == "open")   
        {   
            //连接为打开时   
        }   
        else   
        {   
            //连接为关闭时   
            conn.Open();   
        }   
    }   
    #endregion   
    #region 关闭并释放连接   
    public void CloseConn()   
    {   
        if (conn.State.ToString().ToLower() == "open")   
        {   
            //连接为打开时   
            conn.Close();   
            conn.Dispose();   
        }   
    }   
    #endregion   
    #region 返回DataReader，用于读取数据   
    public SqlDataReader DataRead(string sql)   
    {   
        OpenConn();   
        SqlCommand cmd = new SqlCommand(sql, conn);   
        SqlDataReader dr = cmd.ExecuteReader();   
        return dr;   
    }   
#endregion   
    #region 返回一个数据集   
    public DataSet MySqlDataSet(string Sql, string tableName)   
    {   
        OpenConn();   
        SqlDataAdapter da;   
        DataSet ds = new DataSet();   
        da = new SqlDataAdapter(Sql, conn);   
        da.Fill(ds, tableName);   
        CloseConn();   
        return ds;   
    }   
    #endregion   
    //返回一个数据集   
    public DataView MySqlDataSource(string Sql)   
    {   
        OpenConn();   
        SqlDataAdapter da;   
        DataSet ds = new DataSet();   
        da = new SqlDataAdapter(Sql, conn);   
        da.Fill(ds, "temp");   
        CloseConn();   
        return ds.Tables[0].DefaultView;   
    }   
    #region 执行一个SQL操作:添加、删除、更新操作   
    //执行一个SQL操作:添加、删除、更新操作   
    public void MySqlExcute(string sql)   
    {   
        OpenConn();   
        SqlCommand cmd;   
        cmd = new SqlCommand(sql, conn);   
        cmd.ExecuteNonQuery();   
        cmd.Dispose();   
        CloseConn();   
    }   
    #endregion   
    #region 执行一个SQL操作:添加、删除、更新操作，返回受影响的行   
    //执行一个SQL操作:添加、删除、更新操作，返回受影响的行   
    public int MySqlExecuteNonQuery(string sql)   
    {   
        OpenConn();   
        SqlCommand cmd;   
        cmd = new SqlCommand(sql, conn);   
        int flag = cmd.ExecuteNonQuery();   
        return flag;   
    }   
    #endregion   
    public object MySqlExecuteScalar(string sql)   
    {   
        OpenConn();   
        SqlCommand cmd;   
        cmd = new SqlCommand(sql, conn);   
        object obj = cmd.ExecuteScalar();   
        cmd.Dispose();   
        CloseConn();   
        return obj;   
    }   
    /// <summary>   
    /// 返回DataTable对象   
    /// </summary>   
    /// <param name="sql">sql语句</param>   
    /// <returns></returns>   
    public DataTable MySqlDataTable(string sql)   
    {   
        OpenConn();   
        DataSet ds = new DataSet();   
        SqlDataAdapter da = new SqlDataAdapter(sql, conn);   
        da.Fill(ds, "table");   
        CloseConn();   
        return ds.Tables["table"];   
    }   
    /// <summary>   
    /// 返回一个数据集的记录数   
    /// </summary>   
    /// <param name="sql">传递的sql语句必须为一个统计查询</param>   
    /// <returns></returns>   
    public int MySqlRecordCount(string sql)   
    {   
        //注：Sql 语句必须是一个统计查询   
        OpenConn();   
        SqlCommand cmd = new SqlCommand();   
        cmd.CommandText = sql;   
        cmd.Connection = conn;   
        SqlDataReader dr;   
        dr = cmd.ExecuteReader();   
        int RecordCount = -1;   
        while (dr.Read())   
        {   
            RecordCount = int.Parse(dr[0].ToString());   
        }   
        CloseConn();   
        return RecordCount;   
    }   
    /// <summary>   
    /// 自定义的功能警告   
    /// </summary>   
    /// <param name="str">弹出信息框内容</param>   
    public void SetAlert(string str)   
    {   
        HttpContext.Current.Response.Write("<mce:script language='<a href="http://lib.csdn.net/base/javascript" class='replace_word' title="JavaScript知识库" target='_blank' style='color:#df3434; font-weight:bold;'>JavaScript</a>' type='text/<a href="http://lib.csdn.net/base/javascript" class='replace_word' title="JavaScript知识库" target='_blank' style='color:#df3434; font-weight:bold;'>javascript</a>'><!--  
alert('" + str + "');  
// --></mce:script>");   
    }   
    //返回上一页   
    public void AddErro(string message)   
    {   
        HttpContext.Current.Response.Write("<mce:script type="text/javascript"><!--  
alert('" + message + "');history.back(-1);  
// --></mce:script>");   
    }  
  
    //关闭窗口   
    public void SetCloseWindow()   
    {   
        HttpContext.Current.Response.Write("<mce:script language='JavaScript' type='text/JavaScript'><!--  
window.close();  
// --></mce:script>");   
    }   
    /// <summary>   
    /// 地址跳转   
    /// </summary>   
    /// <param name="str">跳转地址</param>   
    public void SetLocation(string str)   
    {   
        HttpContext.Current.Response.Write("<mce:script language='JavaScript' type='text/JavaScript'><!--  
location='" + str + "';  
// --></mce:script>");   
    }  
  
    public string AjaxSetAlert(string str)   
    {   
        return "<mce:script language='JavaScript' type='text/JavaScript'><!--  
alert('" + str + "');  
// --></mce:script>";   
    }   
    //过滤非法字符   
    public string FilterStr(string Str)   
    {   
        Str = Str.Trim();   
        Str = Str.Replace("*", "");   
        Str = Str.Replace("=", "");   
        Str = Str.Replace("/", "");   
        Str = Str.Replace("$", "");   
        Str = Str.Replace("#", "");   
        Str = Str.Replace("@", "");   
        Str = Str.Replace("&", "");   
        return Str;   
    }   
    //Md5加密<a href="http://lib.csdn.net/base/datastructure" class='replace_word' title="算法与数据结构知识库" target='_blank' style='color:#df3434; font-weight:bold;'>算法</a>   
    public string md5(string str)   
    {   
        return System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(str, "md5").ToLower().Substring(0, 12);   
    }   
    public string RndNum(int VcodeNum)   
    {   
        string Vchar = "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F,G,H,I,J,K,L,M,N,P,Q,R,S,T,U,W,X";   
        string[] VcArray = Vchar.Split(new Char[] { ',' }); //将字符串生成数组   
        string VNum = "";   
        int temp = -1;   
        Random rand = new Random();   
        for (int i = 1; i < VcodeNum + 1; i++)   
        {   
            if (temp != -1)   
            {   
                rand = new Random(i * temp * unchecked((int)DateTime.Now.Ticks));   
            }   
            int t = rand.Next(31);            //数组一般从0开始读取，所以这里为31*Rnd   
            if (temp != -1 && temp == t)   
            {   
                return RndNum(VcodeNum);   
            }   
            temp = t;   
            VNum += VcArray[t];   
        }   
        return VNum;   
    }   
}