C# 操作MySQL

using System;
using System.Data;
using System.Configuration;
using MySql.Data.MySqlClient;
using System.Web.UI.WebControls;
using System.Web;

public class DBQuery
{
    public DBQuery()
 {
  //
  // TODO: 在此处添加构造函数逻辑
  //
       
 }
 
    public static void SetDataView(GridView dg)
    {
        if (GFDB.SysInfo.GridViewPage == 0)
        {
            GFDB.SysInfo.GridViewPage = int.Parse(ConfigurationManager.AppSettings["GridViewPage"].ToString());
        }
        if (GFDB.SysInfo.GridViewPage > 0)
        {
            dg.PageSize = GFDB.SysInfo.GridViewPage;// 15;//每页显示15条记录
        }
        dg.ShowHeaderWhenEmpty = false;
        dg.RowDataBound += new GridViewRowEventHandler(SmartGridView_RowDataBound);
    }
    public static void SetDataView(GridView dg, bool ARowDataBound, bool AShowHeaderWhenEmpty)
    {
        if (GFDB.SysInfo.GridViewPage == 0)
        {
            GFDB.SysInfo.GridViewPage = int.Parse(ConfigurationManager.AppSettings["GridViewPage"].ToString());
        }
        if (GFDB.SysInfo.GridViewPage > 0)
        {
            dg.PageSize = GFDB.SysInfo.GridViewPage;// 15;//每页显示15条记录
        }
        dg.ShowHeaderWhenEmpty = AShowHeaderWhenEmpty;
        if (ARowDataBound)
        {
            dg.RowDataBound += new GridViewRowEventHandler(SmartGridView_RowDataBound);
        }
    }
    public static void SmartGridView_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            e.Row.Attributes.Add("onmouseover", "currentcolor = this.style.backgroundColor;this.style.backgroundColor='#cccccc'");
            e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor = currentcolor");
            e.Row.Attributes["style"] = "Cursor:hand;height:28px;";
        }
    }
       #region EXECUTE DATASET
    //    DBConnectionPool
        /// <summary>
        /// This method returns the data in dataset form. 
        /// </summary>
        /// <param name="cmdType">Command type</param>
        /// <param name="cmdText">Command text</param>
        /// <returns>Data in the form of Dataset.</returns>
        /// <summary>
        public static DataSet ExecuteDataSet(CommandType cmdType, string CommandText)
        {
            DataSet dsData = new DataSet();
            MySqlDataAdapter myDataAdapter = new MySqlDataAdapter();
            MySqlCommand myCommand = new MySqlCommand();
            try
            {
                try
                {
                    myCommand.Connection = DBConnectionPool.getPool().getConnection();
                    myCommand.CommandType = cmdType;
                    myCommand.CommandText =  CommandText; //"set names gbk;" +
                    myDataAdapter.SelectCommand = myCommand;
                    myDataAdapter.Fill(dsData);
                    return dsData;
                }
                catch (MySql.Data.MySqlClient.MySqlException Ex)
                {
                    ExceptLog.SetExcept(Ex);
                    return null;
                    //throw new Exception(Ex.Message);
                    
                }
            }
            finally
            {
                DBConnectionPool.getPool().closeConnection(myCommand.Connection);
            }
            
        }
        /// <summary>
        /// This method returns the data in dataset form. 
        /// </summary>
        /// <param name="cmdType">Command type</param>
        /// <param name="cmdText">Command text</param>
        /// <param name="mysqlParams">MySqlParameters</param>
        /// <returns>Data in the form of Dataset.</returns>
        /// public static DataSet ExecuteDataSet(CommandType cmdType, string CommandText, MySqlParameter[] mysqlParams)
        public static DataSet ExecuteDataSet(CommandType cmdType, string CommandText, MySqlParameter[] mysqlParams)
        {
             
            DataSet dsData = new DataSet();
            MySqlDataAdapter myDataAdapter = new MySqlDataAdapter();
            MySqlCommand myCommand = new MySqlCommand();
            try
            {
                try
                {
                    myCommand.Connection = DBConnectionPool.getPool().getConnection();
                    myCommand.CommandType = cmdType;
                    myCommand.CommandText = CommandText;
                    
                    for (int i = 0; i < mysqlParams.Length; i++)
                    {
                        myCommand.Parameters.Add(mysqlParams[i]);
                    }
                    myDataAdapter.SelectCommand = myCommand;
                    myDataAdapter.Fill(dsData);
                    return dsData;
                }
                catch (Exception Ex)
                {
                    ExceptLog.SetExcept(Ex);
                    return null;
                    //throw Ex;
                }
            }
            finally
            {
                DBConnectionPool.getPool().closeConnection(myCommand.Connection);
            }
        }

        public static bool ExecuteSQLParams(CommandType cmdType, string CommandText, MySqlParameter[] mysqlParams)
        {
            DataSet dsData = new DataSet();
            MySqlDataAdapter myDataAdapter = new MySqlDataAdapter();
            MySqlCommand myCommand = new MySqlCommand();
            try
            {
                try
                {
                    myCommand.Connection = DBConnectionPool.getPool().getConnection();
                    myCommand.CommandType = cmdType;
                    myCommand.CommandText = CommandText;
                    for (int i = 0; i < mysqlParams.Length; i++)
                    {
                        myCommand.Parameters.Add(mysqlParams[i]);
                    }
                    myDataAdapter.SelectCommand = myCommand;
                    myCommand.ExecuteNonQuery();
                    //myDataAdapter.Fill(dsData);
                    return true;
                }
                catch (Exception Ex)
                {
                    ExceptLog.SetExcept(Ex);
                    return false;
                    //throw Ex;
                }
            }
            finally
            {
                DBConnectionPool.getPool().closeConnection(myCommand.Connection);
            }
        }
    public static MySqlDataReader ExecuteDataReader(string CommandText)
        {
            MySqlCommand myCommand = new MySqlCommand();
            MySqlDataReader myReader;
            try
            {
                try
                {
                    myCommand.Connection = DBConnectionPool.getPool().getConnection();
                    myCommand.CommandType = CommandType.Text;
                    myCommand.CommandText = CommandText;
                    myReader = myCommand.ExecuteReader();
                    return myReader;
                }
                catch (Exception Ex)
                {
                    ExceptLog.SetExcept(Ex);
                    return null;
                    //throw Ex;
                }
            }
            finally
            {
                DBConnectionPool.getPool().closeConnection(myCommand.Connection);
            }
        }
    public static DataTable ExecuteDataTable(string CommandText)
    {
        MySqlCommand myCommand = new MySqlCommand();
        
        MySqlDataReader myReader;
        try
        {
            try
            {
                myCommand.Connection = DBConnectionPool.getPool().getConnection();
                myCommand.CommandType = CommandType.Text;
                myCommand.CommandText = CommandText;//"set names gbk;" +
                myReader = myCommand.ExecuteReader();
                DataTable Table = new DataTable("myDataTable");
                Table.Load(myReader);
                return Table;
            }
            catch (Exception Ex)
            {
                ExceptLog.SetExcept(Ex);
                return null; 
            }
        }
        finally
        {
            
            DBConnectionPool.getPool().closeConnection(myCommand.Connection);
        }
    }
    public static DataTable ExecuteSqlReDataTable(string CommandText)
    {
        MySqlCommand myCommand = new MySqlCommand();
        MySqlDataReader myReader;
        try
        {
            try
            {
                myCommand.Connection = DBConnectionPool.getPool().getConnection();
                myCommand.CommandType = CommandType.Text;
                myCommand.CommandText = CommandText;//"set names gbk;" +
                myReader = myCommand.ExecuteReader();
                DataTable Table = new DataTable("myDataTable");
                Table.Load(myReader);
                return Table;
            }
            catch (Exception Ex)
            {
                throw Ex;
                return null;
            }
        }
        finally
        {
            DBConnectionPool.getPool().closeConnection(myCommand.Connection);
        }
    }
    public static string GetParamValueMemo(string AParamName)
    {
 
        string strSQL = "select * from `sys_parameter_memo` where name ='" + AParamName + "'";
        DataTable dt = DBQuery.ExecuteDataTable(strSQL);
        if (dt.Rows.Count == 0)
        {
            return "";
        }
        string str = dt.Rows[0]["pvalue"].ToString().Replace("\r\n", "\n");
       
        string[] slist = str.Split(new char[] {'\n'});
        str = "";
        for (int i = 0; i < slist.Length - 1;i++ )
        {
            if (slist[i].Trim().IndexOf("#") != 0)
            {
                str = str + slist[i];
            }
        }
        return str;
    }
    /// <summary>
    /// 执行一条SQL返回是否成功
    /// </summary>
    /// <param name="cmdType"></param>
    /// <param name="CommandText"></param>
    /// <returns>真假</returns>
    public static bool ExecuteSql(CommandType cmdType, string CommandText,ref string ReError)
    {
        if ("".Equals(CommandText)) 
        {
            ReError = "SQL语为空！";
            return false;
        }
        MySqlCommand myCommand = new MySqlCommand();
        try
        {
            try
            {
                myCommand.Connection = DBConnectionPool.getPool().getConnection();
                myCommand.CommandType = cmdType;
                myCommand.CommandText = CommandText;
                myCommand.ExecuteNonQuery();
                return true;
            }
            catch (Exception Ex)
            {
                ReError = Ex.Message.ToString().Replace("'","`");
                ExceptLog.SetExcept(Ex);
                return false;
            }
        }
        finally
        {
            DBConnectionPool.getPool().closeConnection(myCommand.Connection);
        }
    }
    public static string GetParam(string PName)
    {
        try
        {
            DataTable dt = ExecuteDataTable("select Name,Pvalue from `sys_parameter_list` where Name='" + PName + "';");
            if ((dt == null) || (dt.Rows.Count == 0))
            {
                return "";
            }
            return dt.Rows[0]["Pvalue"].ToString();
        }
        catch (Exception Ex)
        {
            return "";
        }
    }
    public static bool ExecuteSql( string CommandText, ref string ReError)
    {
        if ("".Equals(CommandText))
        {
            ReError = "SQL语为空！";
            return false;
        }
        MySqlCommand myCommand = new MySqlCommand();
        try
        {
            try
            {
                myCommand.Connection = DBConnectionPool.getPool().getConnection();
                myCommand.CommandType = CommandType.Text;
                myCommand.CommandText = CommandText;
                myCommand.ExecuteNonQuery();
                return true;
            }
            catch (Exception Ex)
            {
                ReError = Ex.Message.ToString().Replace("'", "`");
                ExceptLog.SetExcept(Ex);
                return false;
            }
        }
        finally
        {
            DBConnectionPool.getPool().closeConnection(myCommand.Connection);
        }
    }
    public static bool ExecuteSql(string CommandText)
    {
        if ("".Equals(CommandText))
        {
            return false;
        }
        MySqlCommand myCommand = new MySqlCommand();
        try
        {
            try
            {
                myCommand.Connection = DBConnectionPool.getPool().getConnection();
                myCommand.CommandType = CommandType.Text;
                myCommand.CommandText = CommandText;
                myCommand.ExecuteNonQuery();
                return true;
            }
            catch (Exception Ex)
            {
                ExceptLog.SetExcept(Ex);
                return false;
            }
        }
        finally
        {
            DBConnectionPool.getPool().closeConnection(myCommand.Connection);
        }
    }
        #endregion
    public static void ExportExcel(string ExecSQL, string FileName, HttpResponse resp)
    {
        try
        {
            string tmp = "";
            int fc = 0;
            string sFileName = FileName.ToLower();
              if (sFileName == "")
            {
                sFileName = System.DateTime.Today.ToString("yyyyMMdd");
            }
            if (sFileName.IndexOf(".xls")<0){
                sFileName = sFileName + ".xls";
            }
            resp.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");
     
            resp.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(sFileName).ToString());
            //下面就列出常用的一些格式：
            //1） 文本：vnd.ms-excel.numberformat:@
            //2） 日期：vnd.ms-excel.numberformat:yyyy/mm/dd
            //3） 数字：vnd.ms-excel.numberformat:#,##0.00
            //4） 货币：vnd.ms-excel.numberformat:￥#,##0.00
            //5） 百分比：vnd.ms-excel.numberformat: #0.00%
            resp.ContentType = "vnd.ms-excel.numberformat:@";
            //定义表对象与行对像，同时用DataSet对其值进行初始化 
            //DataTable dt = DBQuery.ExecuteDataSet(CommandType.Text, ExecSQL).Tables[0];
            DataTable dt = DBQuery.ExecuteDataTable(ExecSQL);
            //取得数据表各列标题，各标题之间以\t分割，最后一个列标题后加回车符 
            fc = dt.Columns.Count;
            for (int i = 0; i < fc; i++)
            {
                tmp = tmp + "" + dt.Columns[i].Caption.Replace("&nbsp;", "") + "\t";
            }
            resp.Write(tmp + "\n");
            for (int i = 0; i < dt.Rows.Count; i++)
            {
                tmp = "";
                for (int j = 0; j < fc; j++)
                {
                    tmp = tmp + "" + dt.Rows[i].ItemArray[j] + "\t";

                }
                resp.Write(tmp + "\n");
            }
            //强制释放无用资源  
            GC.Collect();
            //写缓冲区中的数据到HTTP头文件中 
            resp.End();
            resp.Flush();
        }
        catch (Exception Ex)
        {
            ExceptLog.SetExcept(Ex);
            throw Ex;
        }
       
    }

        //使用连接后的连接获取方法
//获取连接时，就不用创建连接直接从池中获取数据
        //string strsql = "select * from Chapter";
//SqlDataAdapter sqldap = new SqlDataAdapter(strsql, DBConnectionPool.getPool().getConnection());
        //DataSet set = new DataSet();
        //sqldap.Fill(set);
        //GridView1.DataSource = set.Tables[0].DefaultView;
        //GridView1.DataBind();
}