My DataGrid nested DataList (unsolved)

/// public class index: ScrollPage {protected System.Web.UI.WebControls.Label lblName; protected System.Web.UI.WebControls.Label lblPostId; protected System.Web.UI.WebControls.Label lblPostTime; protected System.Web.UI.WebControls.Label lblContent; protected System.Web.UI.WebControls.Label lblPosterName; protected System.Web.UI.WebControls.Label lblReplyTime; protected System.Web.UI.WebControls.Label lblReplyContent; protected System. Web.UI.WebControls.DataGrid dgPostList; protected System.Web.UI.WebControls.DataList dlReplyList; protected System.Web.UI.HtmlControls.HtmlTextArea txaNewPost; protected DataSet _ds = new DataSet (); private void Page_Load (object sender, System . Eventargs e) {if (! Page.ispostback) {bind ();} // string s = this.request.form ["txanewpost"]; // string s01 = this.Request.form ["txt01"]; // String S02 = this.Request.form ["txanewpost"];} private void bind () {post.getallpost (ref _ds); dataview dvpostlist = new da taView (_ds.Tables [0], "PostType = 0", "PostID desc", DataViewRowState.CurrentRows); dgPostList.DataSource = dvPostList; dgPostList.DataBind ();} protected DataView GetReplyData (int iPostId) {DataView dvPostList = new DataView (_ds.tables [0], "posttype =" ipostid.tostring (), "postid", dataviewrowstate.currentrows; // dataview dvpostlist = new dataview (_ds.tables [0]); //dvpostlist.rowfilter = "PostType =" iPostId.ToString (); return dvPostList;} protected void TrunPage (object sender, DataGridPageChangedEventArgs e) {dgPostList.CurrentPageIndex = e.NewPageIndex; dgPostList.EditItemIndex =

-1; this.bind ();} protected void EditReply (object sender, System.Web.UI.WebControls.DataListCommandEventArgs e) {DataList dlReplyList = (DataList) sender; dlReplyList.EditItemIndex = e.Item.ItemIndex; dgPostList.EditItemIndex = -1; DataGridItem dgi = (DataGridItem) dlReplyList.Parent.Parent; int n = dgi.ItemIndex; int nPostID = (int) dgPostList.DataKeys [n]; Post.getAllPost (ref _ds); dlReplyList.DataSource = GetReplyData ( NPOSTID); DLReplyList.Database (); //dl.database (); //dlreplylist.edititeMindex = E.Item.itemindex; //this.dlreplyList = DL; //post.getallpost(ref_ds); // this .dlReplyList.DataSource = GetReplyData (22); //this.dlReplyList.DataBind (); //this.bind ();} protected void editPost (object sender, System.Web.UI.WebControls.DataGridCommandEventArgs e) {dgPostList. EdititeMindex = E.Item.itemindex; this.bind ();} protected void addpost (object sender, system.web.ui.ImageClickevenTargs e) {// string scontent = this.txanewpost.value.tostring (); Why can't you use a programming method? String scontent = this.request.form ["txanewpost"]; // session ["classmateid"] = 1; post pos = new post (Convert.Toint 32 (Session ["ClassmateID"]), DateTime.now, 0, Scontent ); Post.add (); this.bind ();} public void deletePost (Object sender, DataGridCommandEventAndargs e) {int ipostid = convert.Toint32 (DGPostList.DataKeys [(int) E.Item.itemindex]); POST. Delete (iPostId); this.bind ();} public void DeleteReply (object sender, DataListCommandEventArgs e) {int iPostId = Convert.ToInt32 (dlReplyList.DataKeys [(int) e.Item.ItemIndex]); Post.Delete (iPostId );