Input string was not in a correct format.

Question

the below code has some issue with conversion, kidly help.

ticketid = Convert.ToInt32(Request.QueryString["TicketID"].ToString());

            string countresolved = "Select Count(CurrentStatus) From Ticket Where CurrentStatus='Resolved' and TicketId = ticketid";

            Int32.TryParse(countresolved, out countresolvedint);

            countresolvedint = Convert.ToInt32(countresolved);

            if (Convert.ToInt32(countresolved)==1)

            {

                lblIssueResolved.Visible = true;

                btnIssueResolved.Visible = false;

            

            }