An example of nested repeater in repeater

  In some special cases it is necessary to use repeater in Repeater, here is a good example, interested friends can refer to the following

The code is as follows: protected void Page_Load (object sender, EventArgs e)   {  if (! Page.IsPostBack)   {  this.dtcategory = getcategorytable ();  this.dtproduct = getproducttable ();  Rptcategorylist.datasource = dtcategory;  rptcategorylist.databind (); } } //Prepare a list   DataTable getcategorytable ()   {  datatable dt = new DataTable ();  dt. Columns.Add ("CategoryID", typeof (int));  dt. Columns.Add ("Categorytitle", typeof (String));  for (int i = 1; I <= 3; i++)   {  DataRow row = dt. NewRow ();  row["CategoryID"] = i;  row["categorytitle"] = "Classification name" + i + "";  dt. Rows.Add (Row); }  return dt; } //Prepare a product table   DataTable getproducttable ()   {  DataTable dt = new DataTable ();  dt. Columns.Add ("ProductTitle", typeof (String));  dt. Columns.Add ("CategoryID", typeof (int));  for (int i = 1; I <= 9; i++)   {  DataRow row = dt. NewRow ();  row["ProducttiTle "] =" Product Name "+ i +" ";  if (i > 6) row[" CategoryID "] = 3;  else if (i > 3) row[" CategoryID "] = 2;  else row["CategoryID"] = 1;  dt. Rows.Add (Row); }  return dt; } //Get a category of products   DataTable getproducttable (int CategoryID)   {  DataView dv = this.dtproduct.defaultview;  dv. RowFilter = "Categoryid=" + CategoryID + "";  return DV. ToTable (); }  protected void Rptcategorylist_itemdatabound (object sender, RepeaterItemEventArgs e)   {& nbsp if (E.item.itemtype = = ListItemType.AlternatingItem | | e.item.itemtype = listitemtype.item)   {  DataRowView DRV = (DataRowView) e.item.dataitem;  Literal ltltitle = (Literal) e.item.findcontrol ("Ltltitle");  Ltltitle.text = drv["Categorytitle"]. ToString ();  Repeater rptproductlist = (Repeater) e.item.findcontrol ("Rptproductlist");  Rptproductlist.datasource = getproducttable (Convert.ToInt32 (drv["CategoryID"));  RptProductList.DataBind (); } }  protected void Rptproductlist_itemdatabound (object sender, RepeaterItemEventArgs e)   {& nbsp if (E.item.itemtype = = ListItemType.AlternatingItem | | e.item.itemtype = listitemtype.item)   {  DataRowView DRV = (DataRowView) e.item.dataitem;  Literal ltltitle = (Literal) e.item.findcontrol ("Ltltitle");  Ltltitle.text = drv["ProductTitle"]. ToString (); } }    foreground aspx code   code is as follows: <</code>form id= "Form1" runat= "Server" >   <</CODE>div>  <</code>asp:repeater id= "rptcategorylist" runat= "Server" Onitemdatabound= "Rptcategorylist_itemdatabound" >  <</CODE>ItemTemplate>  <</code >div class= "ListBox" >  <</code>div class= "title" >  <</code>asp:literal id= " Ltltitle "runat=" Server ></</CODE>asp:Literal></</CODE>div>  <</CODE> div class= "Content" >  <</CODE>ul>  <</code>asp:repeater id= "rptproductlist" runat= "Server" onitemdatabound= "Rptproductlist_itemdatabound" >   <</CODE>ItemTemplate>  <</CODE>li>  <</code>asp:literal id= " Ltltitle "runat=" Server ></</CODE>asp:Literal>  </</CODE>li>  </</code >ItemTemplate>  </</CODE>asp:Repeater>  </</CODE>ul>  </</code >div>  </</CODE>div>  </</CODE>ItemTemplate>  </</code>asp: repeat</</code>div>  </</CODE>form>