GridView分页的问题？
if   (!IsPostBack)
                {
                        string   sql   =   "select   *,datediff(hh,getdate(),yqwc_time)   as   sy   from   ask_info   where   request_man= ' "   +   Session[ "user_name "].ToString()   +   " '   order   by   ask_from_time   desc ";
                                ask_list(sql,   GridView1);        
｝

public   void   ask_list(string   sql,   GridView   GridView1)
        {
                SqlConnection   con   =   DB.CreateConn();
                SqlDataAdapter   sda   =   new   SqlDataAdapter(sql,   con);
                DataSet   myds   =   new   DataSet();
                con.Open();
                sda.Fill(myds,   "ask_list ");
                GridView1.DataSource   =   myds.Tables[0];
                GridView1.DataKeyNames   =   new   string[]   {   "id "   };//主键
                GridView1.DataBind();
                sda.Dispose();
                con.Close();
                con.Dispose();
        }

我在GridView属性里设置了AllowPaging= "True "

        protected   void   GridView1_PageIndexChanging(object   sender,   GridViewPageEventArgs   e)
        {
                GridView1.PageIndex   =   e.NewPageIndex;
        }

我为什么我点击GridView控件上的自动生成的页数不换页呢？
而且点一个页数时要点两下才不能点（没有连接了）

请指教！

------解决方案--------------------
GridView1.PageIndex = e.NewPageIndex; 重新绑定 ask_list(sql, GridView1);
------解决方案--------------------
protected void BindData()
{
string sql = "select *,datediff(hh,getdate(),yqwc_time) as sy from ask_info where request_man= ' " + Session[ "user_name "].ToString() + " ' order by ask_from_time desc ";
SqlConnection con = DB.CreateConn();
SqlDataAdapter sda = new SqlDataAdapter(sql, con);
DataSet myds = new DataSet();
con.Open();
sda.Fill(myds, "ask_list ");
GridView1.DataSource = myds.Tables[0];
GridView1.DataKeyNames = new string[] { "id " };//主键
GridView1.DataBind();
sda.Dispose();
con.Close();
con.Dispose();
}
...
if (!IsPostBack)
{

BindData();
｝
...
protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
GridView1.PageIndex = e.NewPageIndex;