Placeholder control application example

The placeholder control can retain the position of the control dynamically added in programming mode, so as to store the dynamically added server control to the web page.

Placeholdercontrol. aspx
1 <% @ Page Language = " C # " Autoeventwireup = " True " Codefile = " Placeholdercontrol. aspx. CS " Inherits = " Placeholdercontrol "   %>
2
3 <! Doctype HTML public " -// W3C // dtd xhtml 1.0 transitional // en "   " Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd " >
4
5 < HTML xmlns = " Http://www.w3.org/1999/xhtml "   >
6 < Head runat = " Server " >
7 < Title > Placeholder control application example </ Title >
8 </ Head >
9 < Body >
10 < Form ID = " Form1 " Runat = " Server " >
11 < Div >
12 The placeholder control can retain the position of the control dynamically added in programming mode, so as to store the dynamically added server control to the web page. < BR />
13 < BR />
14 < BR />
15 < ASP: placeholder ID = " Phcontrol " Runat = " Server " > </ ASP: placeholder >
16
17 </ Div >
18 </ Form >
19 </ Body >
20 </ Html >
21

Placeholdercontrol. aspx. CS
1 Using System;
2 Using System. Data;
3 Using System. configuration;
4 Using System. collections;
5 Using System. Web;
6 Using System. Web. Security;
7 Using System. Web. UI;
8 Using System. Web. UI. webcontrols;
9 Using System. Web. UI. webcontrols. webparts;
10 Using System. Web. UI. htmlcontrols;
11
12 Public Partial Class Placeholdercontrol: system. Web. UI. Page
13 {
14 Protected   Void Page_load ( Object Sender, eventargs E)
15 {
16 // Place user code here to initialize the page
17 Htmlbutton mybutton =   New Htmlbutton ();
18 Mybutton. innertext =   " Example 1 " ;
19 // Add button to placeholdercontrol
20 This . Phcontrol. Controls. Add (mybutton );
21
22 Mybutton =   New Htmlbutton ();
23 Mybutton. innertext =   " Example 2 " ;
24 This . Phcontrol. Controls. Add (mybutton );
25
26 Mybutton =   New Htmlbutton ();
27 Mybutton. innertext =   " Example 3 " ;
28 This . Phcontrol. Controls. Add (mybutton );
29
30 Mybutton =   New Htmlbutton ();
31 Mybutton. innertext =   " Example 4 " ;
32 This . Phcontrol. Controls. Add (mybutton );
33 }
34 }