C#连接操作mysql

1.安装下载mysql

2.安装mysqlworkbench

3.安装mysql for .net

4.在C#项目中引用mysql for .net动态链接库

5.自己写了一个简单数据库连接操作类

usingSystem;

usingSystem.Data;

usingMySql.Data.MySqlClient;

 

 

namespacemysqltest

{

    class sqlclass

    {

        public MySqlConnection mysqlcon;

        public void getMySqlCon()

        {

            StringmysqlStr = "Host=127.0.0.1;Database=student;UserId=lls;Password=123456;CharSet=utf8;port=3306";

 

            mysqlcon = newMySqlConnection(mysqlStr);

            mysqlcon.Open();

           

        }

 

        public DataTable getResultset(stringmysqlquery)

        {

            MySqlCommandmySqlCommand =new MySqlCommand(mysqlquery,mysqlcon);

            MySqlDataReaderreader = mySqlCommand.ExecuteReader();

 

            try

            {

                if(reader.HasRows)

                {

                    DataTabledt =new DataTable();

 

                    //读取SqlDataReader里的内容

 

                    dt.Load(reader);

 

                    //关闭对象和连接

 

                    reader.Close();

 

                    mysqlcon.Close();

 

                    returndt;

 

                }

                returnnull;

 

            }

            catch(Exception)

            {

                reader.Close();

 

                mysqlcon.Close();

                Console.WriteLine("查询失败了!");

                returnnull;

            }

            finally

            {

                reader.Close();

 

                mysqlcon.Close();

              

            }

        }

   

 

    }

}

 

读取datatable的内容:

       DataTablerestable = sqlcontest.getResultset(query);

            stringtest = restable.Columns[0].ColumnName;//获取第0列的列名

            intnumber = restable.Columns.Count; //获取列的个数

            Console.WriteLine(test);

            Console.WriteLine(number);

            DataRow[]drs = restable.Select();

            foreach(DataRow drindrs)

            {

               

                Console.WriteLine("{0},{1},{2}", dr[0].ToString(),dr[1].ToString(), dr[2].ToString());

            }


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