问无法连接到数据库(OCIenVCreate已失败)

EN

        OracleConnectionStringBuilder conBuilder = new OracleConnectionStringBuilder();
        conBuilder.DataSource = dataSrc;
        conBuilder.UserID = user;
        conBuilder.Password = password;

        OracleConnection con = new OracleConnection(conBuilder.ConnectionString);

        OracleCommand cmd = new OracleCommand("foo", con);
        cmd.CommandType = CommandType.StoredProcedure;
        cmd.Parameters.Add("this_is_a_cursor", OracleType.Cursor).Direction = ParameterDirection.Output;

        con.Open(); // Cause the error at runtime
        OracleDataReader reader = cmd.ExecuteReader();
        GridView1.DataSource = reader;
        GridView1.DataBind();
        con.Close();