Question

I have a method which returns DataSet from postgressql database.

    ds = stats.loadStats();

I need to update DataSet randomly, once in 3 minutes (for example).

                Random r = new Random();
                var rendom_number = r.Next(0, 179);//3 minutes = 3*60 = 180 sec.
                if (rendom_number == 1)
                {
                   //reload Dataset here
                }

once event is triggered – I need to dispose of the old Dataset and update it with the new one, without causing overloads, memory leaks, or other troubles. How do you do it with C#?

there are three methods that I know of, but which is the best?

1. method

           ds.Clear(); //disposing of old DataSet
           ds = stats.loadStats(); //loading new
   

2. method

           ds.Dispose(); //disposing of old DataSet
           ds = stats.loadStats(); //loading new
   

3. method

           ds = null; //disposing of old DataSet
           ds = stats.loadStats(); //loading new
   

4. what’s your method? (or the best option)

Answer 1

All you need is

//ds.Clear(); 
//ds = null; 
ds.Dispose();  // not really needed but out of general principle
ds = stats.loadStats();  // gets a new instance

Leave the rest to the Garbage Collector.