How to use SQL Connection Class in Windows Forms Application

Question

Hello Guys!

 

I got adopted this code from this website written by Hammad Maqbool. I found it very interesting but i just want to clarify if how would i going to use this in Windows Forms Applications like in "Try" Statement.

 

This is the class i modified:

 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using MySql.Data.MySqlClient;
using System.Data;

namespace myssfasys
{
    public class myconnstring1
    {
        string ConnString = "Server=localhost; User Id=root; Password=deityshasm911; Database=ssfasys";
        MySqlConnection con;

        public void OpenConection()
        {
            con = new MySqlConnection(ConnString);
            con.Open();
        }


        public void CloseConnection()
        {
            con.Close();
        }


        public void ExecuteQueries(string Query_)
        {
            MySqlCommand cmd = new MySqlCommand(Query_, con);
            cmd.ExecuteNonQuery();
        }


        public MySqlDataReader DataReader(string Query_)
        {
            MySqlCommand cmd = new MySqlCommand(Query_, con);
            MySqlDataReader dr = cmd.ExecuteReader();
            return dr;
        }


        public object ShowDataInGridView(string Query_)
        {
            MySqlDataAdapter dr = new MySqlDataAdapter(Query_, ConnString);
            DataSet ds = new DataSet();
            dr.Fill(ds);
            object dataum = ds.Tables[0];
            return dataum;
        }
    }
}

 I'm just new with programming so please i need help.