帮帮忙啊

各位高手

连接数据库的类
class Conn
{

public SqlConnection creatConn()
{
SqlConnection thisCn = new SqlConnection("server=127.0.0.1;database=test;uid=sa;pwd=sa");
thisCn.Open();
return thisCn;
}
}
}
............................
FORM1_LOAD事件

Conn con = new Conn();
SqlConnection sqlcn = con.creatConn();
SqlCommand com = new SqlCommand("select sum(fdtotalhour) from tabworkertran", sqlcn);
SqlDataReader reader=com.ExecuteReader();

检索到的数据填充到TextBox中,然后不知道怎么做下去了