0

我正在尝试进行如此多的会话，以检索在我的网站内为其创建会话的个人的信息。现在，执行标量只为我分配给此处创建的不同会话的所有标签提供了一个值。我很天真并试图学习这一点，但我不太理解执行阅读器命令......所以请尽可能编写代码...... 

        SqlConnection con = new SqlConnection(strcon);
        SqlCommand cmd = new SqlCommand("Select * from Student where StudId=@sid and Password=@pw", con);
        cmd.Parameters.AddWithValue("@sid", TextBox1.Text);
        cmd.Parameters.AddWithValue("@pw", TextBox2.Text);
        con.Open();
        string name = Convert.ToString(cmd.ExecuteScalar());
        string lastname = Convert.ToString(cmd.ExecuteScalar());
        string gender = Convert.ToString(cmd.ExecuteScalar());
        string dob = Convert.ToString(cmd.ExecuteScalar());
        string pno = Convert.ToString(cmd.ExecuteScalar());
        string address = Convert.ToString(cmd.ExecuteScalar());
        string branch = Convert.ToString(cmd.ExecuteScalar());
        string library = Convert.ToString(cmd.ExecuteScalar());
        string bus = Convert.ToString(cmd.ExecuteScalar());
        string hostel = Convert.ToString(cmd.ExecuteScalar());
        string semester = Convert.ToString(cmd.ExecuteScalar());
        string fname = Convert.ToString(cmd.ExecuteScalar());
        string mname = Convert.ToString(cmd.ExecuteScalar());
        string fpno = Convert.ToString(cmd.ExecuteScalar());
        string mpno = Convert.ToString(cmd.ExecuteScalar());
        string email = Convert.ToString(cmd.ExecuteScalar());
        string img = Convert.ToString(cmd.ExecuteScalar());
        con.Close();

        Session.Add("StudId", TextBox1.Text);
            Session.Add("StudFirstName", name);
            Session.Add("StudLastName", lastname);
            Session.Add("Gender", gender);
            Session.Add("DateOfBirth", dob);
            Session.Add("PhoneNo", pno);
            Session.Add("Address", address);
            Session.Add("BranchId", branch);
            Session.Add("Library", library);
            Session.Add("Bus", bus);
            Session.Add("Hostel", hostel);
            Session.Add("SemesterId", semester);
            Session.Add("FatherName", fname);
            Session.Add("MotherName", mname);
            Session.Add("FatherPhoneNo", fpno);
            Session.Add("MotherPhoneNo", mpno);
            Session.Add("EmailID", email);
            Session.Add("StudImg", img);
            FormsAuthentication.RedirectFromLoginPage(name, false);
4

1 回答 1

1

sqldatareader 的一个例子是这样的：

      SqlConnection obj_con;
        SqlCommand obj_com;
        try
        {
            obj_con = new SqlConnection("your connection string");
            obj_com = new SqlCommand();
            obj_com.Connection = obj_con;
            obj_com.CommandText = ("Select * from Student where StudId=@sid and Password=@pw";)
            SqlParameter p_Id = new SqlParameter("@sid", SqlDbType.NVarChar);
            p_Id.Direction = ParameterDirection.Input;
            p_Id.Value = sid;
            obj_com.Parameters.Add(p_Id);
            SqlParameter p_pass = new SqlParameter("@pw", SqlDbType.NVarChar);
            p_pass.Direction = ParameterDirection.Input;
            p_pass.Value = pw;
            obj_com.Parameters.Add(p_pass);
            obj_con.Open();
            SqlDataReader obj_rd = obj_com.ExecuteReader();
            while (obj_rd.Read())
            {
                StudFirstName = obj_rd[0].ToString();
                StudLastName = obj_rd[1].ToString();
                StudId = obj_rd[2].ToString();
                Gender = obj_rd[3].ToString();
                Address = obj_rd[4].ToString();
                EmailId = obj_rd[5].ToString();
                BranchId = obj_rd[6].ToString();
                SemesterId = obj_rd[7].ToString();
            }
            obj_con.Close();
        }
        catch (Exception s)
        {

        }

如果您有多个结果，您可以创建一个 url列表 url 列表并将每个结果添加到您的列表中。obj_rd[0]指的是我结果中的第一列。所以你有更多的一列，所以你可以通过以下方式获得另一列的结果：obj_rd[1],obj_rd[...]

于 2014-04-06T05:36:23.010 回答