Hashtable与DataTable，ArrayList的简单应用(转自cnblogs)

 1 public void InitData()
 2        {
 3            string sql = @"select  * from orders";
 4
 5            SqlConnection con = new SqlConnection("server=.;uid=sa;pwd=sa;database=NorthWind");
 6            SqlDataAdapter sda = new SqlDataAdapter(sql, con);
 7            DataTable dt = new DataTable();
 8            sda.Fill(dt);
 9
10            Hashtable htt = new Hashtable(5);
11
12            foreach (DataRow dr in dt.Rows)
13            {
14                htt.Add(dr["orderID"], dr["CustomerID"]);
15
16            }
             ArrayList al = new ArrayList(htt.Values);
             al.Sort();
             for (int i = 0; i < al.Count; i++)
             {
                       //if (al[i].ToString() =="VINET")
                         //{
                            // Response.Write(al[i].ToString());
                          //}
                     Response.Write(al[i].ToString());
             }
19            foreach (DictionaryEntry de in htt)
20            {
21               if (de.Value.ToString == "ALFKI")
22               {
23                   Response.Write(de.Key + "Next .");
24               }
25            }
26            GridView1.DataSource = dt;
27            GridView1.DataBind();
28
29        }