Question

高手帮忙,无效操作 连接被关闭,如何解决?

我写的load事件是private void frmNew_Load(object sender, EventArgs e)        {            string st = null;            GetData(st);        }我写的取值函数GetData()如下:public void GetData(string pt)        {            try            {                OracleCommand cm = new OracleCommand("select * from ex_login");                OracleDataReader dr = null;                dr = cm.ExecuteReader();                while (dr.Read())                {                    this.txtbox1.Text = dr.GetString(1).ToString();                }            }            catch (Exception ee)            {                MessageBox.Show(ee.Message.ToString());            }        }编译没有错误,可是运行后,出现错误提示,一个弹出框"无效操作 连接被关闭",如何解决?

Answer 1

马王

Answer 2

qky偃访霸AUO630紊诩峭

Answer 3

回答太w长7了y吧。。。晕。 jαⅷsェfくnмㄑОaimcчtw