c#连接mysql教程数据库教程的方法实例

程序代码：

using MySQLDriverCS; // 建立数据库连接
MySQLConnection DBConn;
DBConn = new MySQLConnection(new MySQLConnectionString("localhost","mysql","root","",3306).AsString);
DBConn.Open(); // 执行查询语句
MySQLCommand DBComm;
DBComm = new MySQLCommand("select Host,User from user",DBConn); // 读取数据MySQLDataReader DBReader = DBComm.ExecuteReaderEx(); // 显示数据
try{while (DBReader.Read()){
Console.WriteLine("Host = {0} and User = {1}", DBReader.GetString(0),DBReader.GetString(1));}}
finally
{DBReader.Close();DBConn.Close();
} //关闭数据库连接DBConn.Close();

实例

static void Main(string[] args)
        {
            string sqlstr = "select * from manavatar";
            MySQLConnection DBConn = new MySQLConnection(new MySQLConnectionString("192.168.0.13", "flashdata", "root", "root", 3306).AsString);
            DBConn.Open();
            //MySQLDataAdapter myadap = new MySQLDataAdapter(sqlstr, conn);
            MySQLCommand DBComm = new MySQLCommand(sqlstr,DBConn);
            MySQLDataReader DBReader = DBComm.ExecuteReaderEx(); //DBComm.ExecuteReaderEx();
            MySQLDataAdapter DTAdapter = new MySQLDataAdapter(sqlstr,DBConn);
           
            DataSet myDataSet = new DataSet();
            DTAdapter.Fill(myDataSet,"manavatar");
         
        
            try
            {
                while (DBReader.Read())
                {
                    //Console.WriteLine("11");
                    Console.WriteLine("DBReader:{0},tttddddd:{1},tt {2}",DBReader.GetString(0), DBReader.GetString(1),DBReader.GetString(3));
                }
                Console.WriteLine("0000");
            }
            catch (Exception e)
            {
                Console.WriteLine("读入失败！"+e.ToString());
            }
            finally
            {
                Console.WriteLine("DBReader关闭");
                Console.WriteLine("DBConn关闭");
                DBReader.Close();
                //DBConn.Close();
            }
           
            for (int i = 0; i < myDataSet.Tables["manavatar"].Rows.Count; i++)
            {
                Console.WriteLine("{0}",myDataSet.Tables["manavatar"].Rows[2]["user"]);
            }
           
           
        }

这是一个简单的例子。
在这里有个问题：dataset如果没设主键的话，可能会引起一些对数库操作的问题，比如会造成updata出现错误