Question

I have a list and i want to use this list value to create timer.And also want to use those timer to execute 2 MySql query. Here is my code,

    Timer timer;        
    List<uint> _dataValues = new List<uint>();     

    private void button1_Click(object sender, EventArgs e)
    {
        string myconstring = "SERVER=localhost;" + "DATABASE=alicosms;" + "UID=root;" + "PASSWORD=;";
        MySqlConnection mycon = new MySqlConnection(myconstring);
        string sql = "SELECT flag FROM sms_data_bankasia group by flag";
        MySqlCommand comd = mycon.CreateCommand();
        comd.CommandText = sql;
        mycon.Open();
        MySqlDataReader dtr = comd.ExecuteReader();
        count = 0;          
        while (dtr.Read())
            {                   
                _dataValues.Add(dtr.GetUInt32(0));

            }

        dtr.Close();                                  


    }
    void PrepareTimers(List<uint> dataValues)
    {
        foreach (uint dataValue in _dataValues)
        {
           timer = new Timer(TimerAction, dataValue, 1000, 0);
        }
    }
    void TimerAction(object flag)
    {
        string myconstring = "SERVER=localhost;" + "DATABASE=alicosms;" + "UID=root;" + "PASSWORD=;";
        MySqlConnection mycon = new MySqlConnection(myconstring);
        MySqlCommand cmd = new MySqlCommand("SELECT * FROM sms_data_bankasia WHERE flag = @flag", mycon);
        MySqlParameter param = new MySqlParameter();
        param.ParameterName = "@flag";
        param.Value = flag;
        cmd.Parameters.Add(param);


    }    

In PrepareTimers section provide error.I also want to add another query in “TimerAction”.So what to do ?Any one can help me?I am using VS 2005.net and C# language.

Answer 1

Since your error syas that No overload for method 'Timer' takes '4' arguments, I’m guessing that you are using System.Timers.Timer class, for which there is no constructor which takes 4 arguments.

As per your code, you need to use:

System.Threading.Timer

Edit(as per the comment): In order to overcome from this naming conflict, either you can create an alias for the nemespace like

using ThreadingTimer = System.Threading.Timer;

and use ThreadingTimer or use fully qualified name like:

System.Threading.Timer = new System.Threading.Timer(TimerAction, dataValue, 1000, 0);