1. 首先需要安装mysql, 脚本之家下载地址: http://www.jb51.net/softs/2193.html 或者去mysql.com官网都可以,一路next,安装好后,有个简单配置,提示有个设置登录密码和服务名称,
默认localhost,用户名root,密码自己设置。
2. 安装了mysql数据库后,需要一个管理工具,就像sqlserver的SQL Server Management Studio一样,推荐使用Navicat for MySQL,
下载地址:http://www.jb51.net/database/2223.html,安装后,打开界面如下图
确定后,右键新建的连接名字,就可以建数据库,建表了。字段类型和sqlserver基本一致。
3. Asp.net连接mysql 不推荐使用ODBC,推荐是用mysql官网提供的组件动)MySQL.Data.Dll,官网地址,
http://dev.mysql.com/downloads/connector/net/5.1.html;可能需要简单的注册下用户,看好版本,如果嫌弃麻烦可以直接下载一个相应版本的MySQL.Data.Dll ,放入bin下,增加引用即可 4. 我自己写的一个简单MysqlHelper.cs类,操作和sqlserver 很相似。有了这个类,你就知道怎么用了,很简单 代码如下
. 代码如下:
using System; using System.Collections; using System.Collections.Specialized; using System.Data; using MySql.Data.MySqlClient; using System.Configuration; using System.Data.Common; using System.Collections.Generic; using System.Text.RegularExpressions; namespace LOAF.DAL { public class MysqlHelper { //数据库连接字符串(web.config来配置),可以动态更改connectionString支持多数据库. // public static string connectionString = ConfigurationManager.ConnectionStrings["ConnDB"].ConnectionString; public static string connectionString = ConfigurationManager.AppSettings["MySQL"]; //public string m = ConfigurationManager.AppSettings["MySQL"]; public MysqlHelper() { } #region ExecuteNonQuery //执行SQL语句,返回影响的记录数 /// <summary> /// 执行SQL语句,返回影响的记录数 /// </summary> /// <param name="SQLString">SQL语句</param> /// <returns>影响的记录数</returns> public static int ExecuteNonQuery(string SQLString) { using (MySqlConnection connection = new MySqlConnection(connectionString)) { using (MySqlCommand cmd = new MySqlCommand(SQLString, connection)) { try { connection.Open(); int rows = cmd.ExecuteNonQuery(); return rows; } catch (MySql.Data.MySqlClient.MySqlException e) { connection.Close(); throw e; } } } } /// <summary> /// 执行SQL语句,返回影响的记录数 /// </summary> /// <param name="SQLString">SQL语句</param> /// <returns>影响的记录数</returns> public static int ExecuteNonQuery(string SQLString, params MySqlParameter[] cmdParms) { using (MySqlConnection connection = new MySqlConnection(connectionString)) { using (MySqlCommand cmd = new MySqlCommand()) { try { PrepareCommand(cmd, connection, null, SQLString, cmdParms); int rows = cmd.ExecuteNonQuery(); cmd.Parameters.Clear(); return rows; } catch (MySql.Data.MySqlClient.MySqlException e) { throw e; } } } } //执行多条SQL语句,实现数据库事务。 /// <summary> /// 执行多条SQL语句,实现数据库事务。 /// </summary> /// <param name="SQLStringList">多条SQL语句</param> public static bool ExecuteNoQueryTran(List<String> SQLStringList) { using (MySqlConnection conn = new MySqlConnection(connectionString)) { conn.Open(); MySqlCommand cmd = new MySqlCommand(); cmd.Connection = conn; MySqlTransaction tx = conn.BeginTransaction(); cmd.Transaction = tx; try { for (int n = 0; n < SQLStringList.Count; n++) { string strsql = SQLStringList[n]; if (strsql.Trim().Length > 1) { cmd.CommandText = strsql; PrepareCommand(cmd, conn, tx, strsql, null); cmd.ExecuteNonQuery(); } } cmd.ExecuteNonQuery(); tx.Commit(); return true; } catch { tx.Rollback(); return false; } } } #endregion #region ExecuteScalar /// <summary> /// 执行一条计算查询结果语句,返回查询结果(object)。 /// </summary> /// <param name="SQLString">计算查询结果语句</param> /// <returns>查询结果(object)</returns> public static object ExecuteScalar(string SQLString) { using (MySqlConnection connection = new MySqlConnection(connectionString)) { using (MySqlCommand cmd = new MySqlCommand(SQLString, connection)) { try { connection.Open(); object obj = cmd.ExecuteScalar(); if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value))) { return null; } else { return obj; } } catch (MySql.Data.MySqlClient.MySqlException e) { connection.Close(); throw e; } } } } /// <summary> /// 执行一条计算查询结果语句,返回查询结果(object)。 /// </summary> /// <param name="SQLString">计算查询结果语句</param> /// <returns>查询结果(object)</returns> public static object ExecuteScalar(string SQLString, params MySqlParameter[] cmdParms) { using (MySqlConnection connection = new MySqlConnection(connectionString)) { using (MySqlCommand cmd = new MySqlCommand()) { try { PrepareCommand(cmd, connection, null, SQLString, cmdParms); object obj = cmd.ExecuteScalar(); cmd.Parameters.Clear(); if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value))) { return null; } else { return obj; } } catch (MySql.Data.MySqlClient.MySqlException e) { throw e; } } } } #endregion #region ExecuteReader /// <summary> /// 执行查询语句,返回MySqlDataReader ( 注意:调用该方法后,一定要对MySqlDataReader进行Close ) /// </summary> /// <param name="strSQL">查询语句</param> /// <returns>MySqlDataReader</returns> public static MySqlDataReader ExecuteReader(string strSQL) { MySqlConnection connection = new MySqlConnection(connectionString); MySqlCommand cmd = new MySqlCommand(strSQL, connection); try { connection.Open(); MySqlDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection); return myReader; } catch (MySql.Data.MySqlClient.MySqlException e) { throw e; } } /// <summary> /// 执行查询语句,返回MySqlDataReader ( 注意:调用该方法后,一定要对MySqlDataReader进行Close ) /// </summary> /// <param name="strSQL">查询语句</param> /// <returns>MySqlDataReader</returns> public static MySqlDataReader ExecuteReader(string SQLString, params MySqlParameter[] cmdParms) { MySqlConnection connection = new MySqlConnection(connectionString); MySqlCommand cmd = new MySqlCommand(); try { PrepareCommand(cmd, connection, null, SQLString, cmdParms); MySqlDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection); cmd.Parameters.Clear(); return myReader; } catch (MySql.Data.MySqlClient.MySqlException e) { throw e; } // finally // { // cmd.Dispose(); // connection.Close(); // } } #endregion #region ExecuteDataTable /// <summary> /// 执行查询语句,返回DataTable /// </summary> /// <param name="SQLString">查询语句</param> /// <returns>DataTable</returns> public static DataTable ExecuteDataTable(string SQLString) { using (MySqlConnection connection = new MySqlConnection(connectionString)) { DataSet ds = new DataSet(); try { connection.Open(); MySqlDataAdapter command = new MySqlDataAdapter(SQLString, connection); command.Fill(ds, "ds"); } catch (MySql.Data.MySqlClient.MySqlException ex) { throw new Exception(ex.Message); } return ds.Tables[0]; } } /// <summary> /// 执行查询语句,返回DataSet /// </summary> /// <param name="SQLString">查询语句</param> /// <returns>DataTable</returns> public static DataTable ExecuteDataTable(string SQLString, params MySqlParameter[] cmdParms) { using (MySqlConnection connection = new MySqlConnection(connectionString)) { MySqlCommand cmd = new MySqlCommand(); PrepareCommand(cmd, connection, null, SQLString, cmdParms); using (MySqlDataAdapter da = new MySqlDataAdapter(cmd)) { DataSet ds = new DataSet(); try { da.Fill(ds, "ds"); cmd.Parameters.Clear(); } catch (MySql.Data.MySqlClient.MySqlException ex) { throw new Exception(ex.Message); } return ds.Tables[0]; } } } //获取起始页码和结束页码 public static DataTable ExecuteDataTable(string cmdText, int startResord, int maxRecord) { using (MySqlConnection connection = new MySqlConnection(connectionString)) { DataSet ds = new DataSet(); try { connection.Open(); MySqlDataAdapter command = new MySqlDataAdapter(cmdText, connection); command.Fill(ds, startResord, maxRecord, "ds"); } catch (MySql.Data.MySqlClient.MySqlException ex) { throw new Exception(ex.Message); } return ds.Tables[0]; } } #endregion /// <summary> /// 获取分页数据 在不用存储过程情况下 /// </summary> /// <param name="recordCount">总记录条数</param> /// <param name="selectList">选择的列逗号隔开,支持top num</param> /// <param name="tableName">表名字</param> /// <param name="whereStr">条件字符 必须前加 and</param> /// <param name="orderExpression">排序 例如 ID</param> /// <param name="pageIdex">当前索引页</param> /// <param name="pageSize">每页记录数</param> /// <returns></returns> public static DataTable getPager(out int recordCount, string selectList, string tableName, string whereStr, string orderExpression, int pageIdex, int pageSize) { int rows = 0; DataTable dt = new DataTable(); MatchCollection matchs = Regex.Matches(selectList, @"top\s+\d{1,}", RegexOptions.IgnoreCase);//含有top string sqlStr = sqlStr = string.Format("select {0} from {1} where 1=1 {2}", selectList, tableName, whereStr); if (!string.IsNullOrEmpty(orderExpression)) { sqlStr += string.Format(" Order by {0}", orderExpression); } if (matchs.Count > 0) //含有top的时候 { DataTable dtTemp = ExecuteDataTable(sqlStr); rows = dtTemp.Rows.Count; } else //不含有top的时候 { string sqlCount = string.Format("select count(*) from {0} where 1=1 {1} ", tableName, whereStr); //获取行数 object obj = ExecuteScalar(sqlCount); if (obj != null) { rows = Convert.ToInt32(obj); } } dt = ExecuteDataTable(sqlStr, (pageIdex-1)*pageSize, pageSize); recordCount = rows; return dt; } #region 创建command private static void PrepareCommand(MySqlCommand cmd, MySqlConnection conn, MySqlTransaction trans, string cmdText, MySqlParameter[] cmdParms) { if (conn.State != ConnectionState.Open) conn.Open(); cmd.Connection = conn; cmd.CommandText = cmdText; if (trans != null) cmd.Transaction = trans; cmd.CommandType = CommandType.Text;//cmdType; if (cmdParms != null) { foreach (MySqlParameter parameter in cmdParms) { if ((parameter.Direction == ParameterDirection.InputOutput || parameter.Direction == ParameterDirection.Input) && (parameter.Value == null)) { parameter.Value = DBNull.Value; } cmd.Parameters.Add(parameter); } } } #endregion } }
5. 需要注意的地方有如下几点
1)在sqlserver中参数化sql语句是用“@”符号,在mysql里面需要是用?号,切记,切记. 2 )还有就是sqlserver中删除表可以这样写delete news where ID=12,但是在mysql里面 是delete from news where ID=12,收了from报错 3 )我在使用过程中遇到了中文乱码,网上大部分解决办法是把表的设置成utf-8字符集。以及 C:\Program Files\MySQL\MySQL Server 5.1路径下my.ini 打开找到两处
default-character-set 都设置成=utf8,但是我的还是乱码,最后 6.以上是我的个人总结,有可能很肤浅,不要见笑,有问题共同解决,谢谢~
转自:http://www.poluoluo.com/jzxy/201304/202859.html