how to pass 3 command arguments in row command event

protected void gridview_RowCommand(object sender, GridViewCommandEventArgs e)
{
      string[] arg = new string[2];
      arg = e.CommandArgument.ToString().Split(';');
      Session["IdTemplate"] = arg[0];
      Session["IdEntity"] = arg[1];
      Response.Redirect("Samplepage.aspx");
}

pls check this

pls check this
Ok

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it was fine but i need to pass those arguments in page redirect

if (e.CommandName == "Edit")
           {

             string[] commandArgs =e.CommandArgument.ToString().Split(new char[] { ',' });

             string  deptid = commandArgs[0];
             string classname = commandArgs[1];
             string sem = commandArgs[2];

               //int Studid = Convert.ToInt32(e.CommandArgument.ToString());
             Response.Redirect("AddSubjects.aspx?Deptid=" + deptid + "?classid=" + classname + "?Sem=" + sem + "");
           }

This is my code but its nt work