usingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingSystem.Text;usingSystem.Data;usingSystem.Configuration;usingSystem.Data.SqlClient;usingMySql.Data.MySqlClient;namespaceMySQLHelper

{public static classMySqlHelper

{//从配置文件中获取连接字符串 readonly修饰的变量只能在初始化或构造函数中赋值；其他地方只能读取//private static readonly string constr = ConfigurationManager.ConnectionStrings["OperationHistory"].ConnectionString;

private static readonly string constr = "server=127.0.0.1;port=3306;database=mygamedb;user=root;password=root";///

///增、删、改的方法[ExecuteNonQuery] 返回所影响的行数，执行其他///

/// Sql命令

/// SQL语句(CommandType.Text)或者存储过程(CommandType.StoredProcedure)

///

///

public static int ExecuteNonQuery(string sql, CommandType cmdtype, paramsSqlParameter[] pms)

{int i = -1;try{using (MySqlConnection con = newMySqlConnection(constr))

{using (MySqlCommand cmd = newMySqlCommand(sql, con))

{//存储过程或者Sql语句

cmd.CommandType =cmdtype;if (pms != null)

{

cmd.Parameters.AddRange(pms);

}

con.Open();

i=cmd.ExecuteNonQuery();

}

}

}catch(Exception)

{throw;

}returni;

}///

///执行查询、查询多少条数据；返回第一行，第一列方法[ExecuteScalar] 返回-1执行失败///

/// Sql命令

/// SQL语句(CommandType.Text)或者存储过程(CommandType.StoredProcedure)

///

///

public static object ExecuteScalar(string sql, CommandType cmdtype, paramsSqlParameter[] pms)

{try{using (MySqlConnection con = newMySqlConnection(constr))

{using (MySqlCommand cmd = newMySqlCommand(sql, con))

{//存储过程或者Sql语句

cmd.CommandType =cmdtype;if (pms != null)

{

cmd.Parameters.AddRange(pms);

}

con.Open();returncmd.ExecuteScalar();

}

}

}catch(Exception)

{throw;

}

}///

///执行查询，返回多行、多列的方法ExecuteReader()///

/// Sql命令

/// SQL语句(CommandType.Text)或者存储过程(CommandType.StoredProcedure)

///

///

public static MySqlDataReader ExecuteReader(string sql, CommandType cmdtype, paramsSqlParameter[] pms)

{using (MySqlConnection con = newMySqlConnection(constr))

{using (MySqlCommand cmd = newMySqlCommand(sql, con))

{//存储过程或者Sql语句

cmd.CommandType =cmdtype;if (pms != null)

{

cmd.Parameters.AddRange(pms);

}try{

con.Open();returncmd.ExecuteReader(System.Data.CommandBehavior.CloseConnection);

}catch{

con.Close();

con.Dispose();throw;

}

}

}

}///

///执行返回多个查询时使用,返回DataTable类型///

/// Sql命令

/// SQL语句(CommandType.Text)或者存储过程(CommandType.StoredProcedure)

/// 参数

///

public static DataTable ExecuteDataTable(string sql, CommandType cmdtype, paramsSqlParameter[] pms)

{

DataTable dt= newDataTable();try{//通过adapter读取数据。

using (MySqlDataAdapter adapter = newMySqlDataAdapter(sql, constr))

{

adapter.SelectCommand.CommandType=cmdtype;if (pms != null)

{

adapter.SelectCommand.Parameters.AddRange(pms);

}

adapter.Fill(dt);returndt;

}

}catch(Exception)

{throw;

}

}///

///需要获得多个结果集的时候用该方法，返回DataSet对象。///

///

///

public static DataSet ExecuteDataSet(string sql, paramsSqlParameter[] paras)

{using (MySqlConnection con = newMySqlConnection(constr))

{//数据适配器

MySqlDataAdapter sqlda = newMySqlDataAdapter(sql, con);

sqlda.SelectCommand.Parameters.AddRange(paras);

DataSet ds= newDataSet();

sqlda.Fill(ds);returnds;//不需要打开和关闭链接.

}

}

}

}