C#绑定GridView后，分页效果不起作用
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string scon = ConfigurationManager.AppSettings["connertionstr"].ToString();
SqlConnection mycon = new SqlConnection(scon);
mycon.Open();
SqlCommand mycom = new SqlCommand(sqlselect, mycon);
SqlDataReader dr = mycom.ExecuteReader();
if (dr.Read()){mycon.Close();
mycon.Open();
SqlDataAdapter ds = new SqlDataAdapter(sqlselect, mycon);
DataSet dy = new DataSet();
DataTable dt = new DataTable();
l_number.Text = dt.Rows.Count.ToString();
ds.Fill(dy, "GoodsInformation");
GridView1.DataSource = dy.Tables["GoodsInformation"];
GridView1.DataBind();}}protected void gvGridView_PageIndexChanging(object sender, GridViewPageEventArgs e)
{ //分页操作
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