Question

My program cannot determine whether to execute Math.Round as a decimal or a double, but I have no idea how to fix this… Here is my code, though the second to last line is what I am concerned with.

 ArrayList topp1 = new ArrayList();
 int toppcount = 0;
 foreach (Control cb in GroupBoxH1T.Controls)
 {
     CheckBox cb1 = cb as CheckBox;
     if (cb1.Checked == true)
     {
          toppcount++;
          topp1.Add(cb1.Text);
     }
  }

  if (cbhwchoice.Checked == false)
  {
      ArrayList topp2 = new ArrayList();
      foreach (Control cb in GroupBoxH2T.Controls)
      {
          CheckBox cb1 = cb as CheckBox;
          if (cb1.Checked == true)
          {
              toppcount++;
              topp2.Add(cb1.Text);
          }
      }

      toppcount = Math.Round((toppcount/2,MidpointRounding.AwayFromZero);
  }

Answer 1

Math.Round expects a floating point or decimal number because calling it on an integer would have no effect. If you want to call it, pass in a value of that type. To do so, you can simply cast the numerator and denominator to the desired type. For Example:

decimal value = Convert.ToDecimal(toppcount) / 2.0M;
toppcount = Math.Round(value, MidpointRounding.AwayFromZero);