repeater分页显示方法有关问题

repeater分页显示方法问题
//Repeater分页控制显示方法
  public void contrlRepeater(int userId)
  {
  string connectionString = ConfigurationManager.ConnectionStrings["db_health"].ConnectionString;
  SqlConnection conn = new SqlConnection(connectionString);
  conn.Open();
  string sql = "select * from health_user_followup_content where user_id=" + userId + "";
  DataTable dt = new DataTable(sql,conn);
  PagedDataSource pds = new PagedDataSource();
  pds.DataSource = dt.DefaultView;
  pds.AllowPaging = true;
  pds.PageSize = 5;
  pds.CurrentPageIndex = Convert.ToInt32(this.labPage.Text) - 1;
  rpUserList.DataSource = pds;
  LabCountPage.Text = pds.PageCount.ToString();
  labPage.Text = (pds.CurrentPageIndex + 1).ToString();
  this.lbtnpritPage.Enabled = true;
  this.lbtnFirstPage.Enabled = true;
  this.lbtnNextPage.Enabled = true;
  this.lbtnDownPage.Enabled = true;
  if (pds.CurrentPageIndex < 1)
  {
  this.lbtnpritPage.Enabled = false;
  this.lbtnFirstPage.Enabled = false;
  }
  if (pds.CurrentPageIndex == pds.PageCount - 1)
  {
  this.lbtnNextPage.Enabled = false;
  this.lbtnDownPage.Enabled = false;
  }
  rpUserList.DataBind();
  }
在DataTable dt = new DataTable(sql,conn);这句中报出下面两个错误

//错误2与“System.Data.DataTable.DataTable(string, string)”最匹配的重载方法具有一些无效参数
  //错误3参数“2”: 无法从“System.Data.SqlClient.SqlConnection”转换为“string”

[解决办法]
你创建table,没有进行填充fill,
[解决办法]
DataTable第二个参数不是sql连接，而是连接字符串。