  using System;
  using System.Collections;
  using System.Collections.Generic;
  using System.Data.SqlClient;
  
  using System.Web;
  using System.Web.UI;
  using System.Web.UI.WebControls;
  
  public partial class DBHelperDemo : System.Web.UI.Page
  {
      protected void Page_Load(object sender, EventArgs e)
      {
  
      }
      protected void Button_Click(object sender, EventArgs e)
      {
  
          Hashtable ht = new 【Hashtable】();
          ht.【Add】("UserName", TextBox1.Text);
  
          dg.【DataSource】 = DBHelper.【GetTable】("select * from users where UserName=@UserName", ht);
          dg.DataBind();
  
      }
  }

--答案--
   Hashtable   DataSource   GetTable