Dynamic generation of able binding to datalist

Default. aspx:

Program code <asp: datalist id = "datalist1" runat = "server" oncancelcommand = "login" ondeletecommand = "datalist1_delete" oneditcommand = "datalist1_edit" onupdatecommand = "datalist1_update" datakeyfield = "ID">
<Itemtemplate>
<Div style = "background-color: red;"> <% # eval ("ID") %>, <% # eval ("sitename") %>, <% # eval ("url") %> <asp: button id = "button1" commandname = "edit" runat = "server"
TEXT = "edit"/> <asp: button id = "button2" commandname = "delete" runat = "server" text = "delete"/> </div>
</Itemtemplate>
<Separatortemplate>
<HR style = "height: 1px;"/>
</Separatortemplate>
<Edititemtemplate>
<Div> <asp: textbox id = "textbox1" runat = "server" text = '<% # eval ("sitename") %>'> </ASP: textbox> <asp: textbox id = "textbox2" runat = "server" text = '<% # eval ("url") %>'> </ASP: textbox>
<Asp: button
Id = "button7" commandname = "Update" runat = "server" text = "Update"/> <asp: button id = "button8" commandname = "cancel" runat = "server"
TEXT = "cancel"/> </div>
</Edititemtemplate>
</ASP: datalist>

Default. aspx. CS:

Program code using system;
Using system. Data;
Using system. Data. Sqlclient;
Using system. configuration;
Using system. collections;
Using system. Web;
Using system. Web. Security;
Using system. Web. UI;
Using system. Web. UI. webcontrols;
Using system. Web. UI. webcontrols. webparts;
Using system. Web. UI. htmlcontrols;

Public partial class _ default: system. Web. UI. Page
{
Protected void page_load (Object sender, eventargs E)
{
If (! Ispostback)
{
Dataset DS = new dataset ();
Datatable dt = new datatable ();
Datacolumn DC;
Datarow Dr;

// --------------------- Add the field ----------------

// Create Field 1
Dc = new datacolumn ();
DC. datatype = system. type. GetType ("system. int32 ");
DC. columnname = "ID ";
DC. autoincrement = true; // ID
DC. autoincrementseed = 1; // identify the seed
DC. autoincrementstep = 1; // ID Increment
DT. Columns. Add (DC );
// Create Field 2
Dc = new datacolumn ();
DC. datatype = system. type. GetType ("system. String ");
DC. columnname = "sitename ";
DC. allowdbnull = true;
DT. Columns. Add (DC );
// Create Field 3
Dc = new datacolumn ();
DC. datatype = system. type. GetType ("system. String ");
DC. columnname = "url ";
DC. allowdbnull = true;
DT. Columns. Add (DC );
// Set the primary key
Datacolumn [] newdc = new datacolumn [1]; // you can set multiple fields as primary keys.
Newdc [0] = DT. Columns ["ID"];
DT. primarykey = newdc;

// --------------------- Add record ----------------

// Record 1
Dr = DT. newrow ();
Dr ["sitename"] = "Shang net ";
Dr ["url"] = "http://www.jjshang.com /";
DT. Rows. Add (DR );
// Record 2
Dr = DT. newrow ();
Dr ["sitename"] = "wooden house ";
Dr ["url"] = "http://www.mzwu.com /";
DT. Rows. Add (DR );
// Record 3
Dr = DT. newrow ();
Dr ["sitename"] = "Netease ";
Dr ["url"] = "http://www.126.com /";
DT. Rows. Add (DR );

// ---- Add the table to dataset and bind it to datalist ----
DS. Tables. Add (DT );
DS. Tables [0]. tablename = "Homepage ";
Session ["ds"] = Ds;
Binddata ();
}
}
Private void binddata ()
{
(Dataset) session ["ds"]). Tables ["Homepage"]. defaultview. Sort = "id DESC ";
Datalist1.datasource = (Dataset) session ["ds"]). Tables ["Homepage"]. defaultview;
Datalist1.databind ();
}
Protected void datalist1_cancel (Object source, datalistcommandeventargs E)
{
Datalist1.edititemindex =-1;
Binddata ();
}
Protected void datalist1_delete (Object source, datalistcommandeventargs E)
{
Int id = (INT) datalist1.datakeys [E. Item. itemindex];

Datarow DR = (Dataset) session ["ds"]). Tables ["Homepage"]. Rows [getrow (ID)];
Dr. Delete ();

Datalist1.edititemindex =-1;
Binddata ();
}
Protected void datalist1_edit (Object source, datalistcommandeventargs E)
{
Datalist1.edititemindex = E. Item. itemindex;
Binddata ();
}
Protected void datalist1_update (Object source, datalistcommandeventargs E)
{
String sitename = (textbox) E. Item. findcontrol ("textbox1"). text;
String url = (textbox) E. Item. findcontrol ("textbox2"). text;
Int id = (INT) datalist1.datakeys [E. Item. itemindex];

Datarow DR = (Dataset) session ["ds"]). Tables ["Homepage"]. Rows [getrow (ID)];
Dr ["sitename"] = sitename;
Dr ["url"] = URL;

Datalist1.edititemindex =-1;
Binddata ();
}
Private int getrow (int id)
{
Datarow Dr;
For (INT I = 0; I <(Dataset) session ["ds"]). Tables ["Homepage"]. Rows. Count; I ++)
{
Dr = (Dataset) session ["ds"]). Tables ["Homepage"]. Rows [I];
If (INT) Dr ["ID"] = ID) return I;
}
Return 0;
}
}