Retrieve multiple column values from DBtable in session var

{
int userId = 0;
string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
using (SqlConnection con = new SqlConnection(constr))
{
using (SqlCommand cmd = new SqlCommand("Validate_User"))
{
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("@Username", txtUname.Text.Trim());
cmd.Parameters.AddWithValue("@Password", txtPassword.Text.Trim());
cmd.Connection = con;
con.Open();
SqlDataAdapter sda = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
DataTable dt = new DataTable();
sda.Fill(dt);
userId = Convert.ToInt32(cmd.ExecuteScalar());

if (dt.Rows.Count > 0)
{
lblmsg.Text = "Login Successful";
Session["uid"] = dt.Rows[0]["UserId"].ToString(); //stores user name
Session["Username"] = dt.Rows[0]["Password"].ToString();
Session["city"] = dt.Rows[0]["City"].ToString();
Response.Redirect("~/Home.aspx");
}
else
{
lblmsg.Text = "Login failed";
}
con.Close();
con.Dispose();
}
}
}