Dont Display Address If Its Not There!

hi there, i have a invoice template that when printed has a box for the users address (which there always will be) and a box for their delivery address if they are having the items delivered. However sometimes they dont have things delivered and so the record in the delivery table does not exist. In this case it will throw an error, how can i avoid this. the code im using i have posted below string sql = "SELECT [del_address], [del_post_code], [del_date], [del_time] From tbl_del WHERE order_ID = " + intOrderID;

 

 

//This creates a sql command which executes the sql statement.SqlCommand sqlCmd = new SqlCommand(sql, myConn);

myConn.Open();SqlDataReader dr = sqlCmd.ExecuteReader();

//This reads the first result from the sqlReader

dr.Read();

try

{

 

 

//string strDel_Address = dr["del_address"].ToString();

 if (Convert.ToString(dr["del_charge"].ToString()) != null)

{

//delivery items lblDelAddy.Text = dr["del_address"].ToString();

lblDelPCode.Text = dr["del_post_code"].ToString();