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如果远程连接
考虑执行下面的语句,如果已经有root用户,第一句忽略
CREATE USER 'root'@'%' IDENTIFIED BY 'root';
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' WITH GRANT OPTION;
FLUSH PRIVILEGES;
连接需要MySql.Data
vs下 工具-->NuGet 包管理 -->管理 解决方案的NuGet程序包
浏览-->搜索Mysql
就能找到
下面是个帮助连接mysql和增删改查的类
class MySqlHelper
{
private MySqlConnection myConnection = null;
private DataTable dataTable;
/*连接数据库
* @param ip 数据库的IP地址
* @param user 用户名
* @param password 密码
* @param database 数据库
*/
public MySqlHelper(string ip,string user,string password,string database)
{
myConnection = new MySqlConnection(
string.Format("server={0};user id={1};password={2};database={3}", ip, user, password, database));
myConnection.Open();
}
/*
* 执行查询语句,
* 返回查询到的行数,错误返回-1
*/
public int Query(string sql)
{
try
{
MySqlDataAdapter adapter = new MySqlDataAdapter(sql, myConnection);
dataTable = new DataTable();
adapter.Fill(dataTable);
foreach (DataRow dr in dataTable.Rows)
{
foreach (DataColumn dc in dr.Table.Columns)
{
Console.Write(dr[dc] + " ");
}
Console.WriteLine();
}
return dataTable.Rows.Count;
}
catch (Exception e)
{
Console.WriteLine(e.Message);
return -1;
}
}
/*
* 执行语句(insert,update,delete,drop,truncate,use,create)
* 返回影响到的行数
* 错误返回-1
* drop,truncate,use成功返回0
* create database成功返回1
*/
public int Exec(string sql)
{
try
{
MySqlCommand command = new MySqlCommand(sql, myConnection);
int rows = command.ExecuteNonQuery();
return rows;
}
catch (Exception e)
{
Console.WriteLine(e.Message);
return -1;
}
}
/*
* 关闭连接
*/
~MySqlHelper()
{
myConnection.Close();
}
}