PlaceHolder1.Controls.Clear ();
through the code, you can project the module folder to see a page that contains a Web User Control (ASCX) the name of the query string parameter p. You do not have all the ASCX files are placed in a separate folder, but doing so can actually further isolate applications.
string p = Request.QueryString.Get (“p”);
{
For a list of all members of this type, see
public class PlaceHolder: Control < br /> PlaceHolder1.Controls.Add (LoadControl
main.aspx page in the site you choose to decorate create content-rich site in the place you want to add a PlaceHolder control where the content and then, add the following code to your The page Page
first in VS.NET to create a new ASP.NET
page of the server control container. PlaceHolder control does not produce any visible output and can only be used for Web
ID = “PlaceHolder1″ Runat = “server” />
number p. You do not have all the ASCX files are placed in a separate folder, but doing so can actually further isolate the
public __gc class PlaceHolder: public Control
main.aspx page in the site you choose to decorate create content-rich site in the place you want to add a PlaceHolder control where the content
string p = Request . QueryString.Get (“p”);
[Visual Basic]
myButton = new HtmlButton ();
In the past, a popular ASP technology is a major part of each page create an include file, and then build a whole
PlaceHolder1.Controls.Add (myButton);

PlaceHolder1.Controls.Add (new
pieces which control the other controls as a collection (collection) contains up you can clear that run-time collection or add
C #]
PlaceHolder1.Controls.Clear ();
[C #]

myButton.InnerText = “Button 4″;
%>
WEbControl wc = new WebControl (HtmlTextWriterTag.Textarea);
private void Page_Load (object sender, System. EventArgs e)
PlaceHolder1.Controls.Add (myButton);
This type of All public static (Visual Basic for
PlaceHolder so you can insert a Textarea
System. Web.UI.Control
Load event: private void Page_Load (object sender,
PlaceHolder1.Controls.Add (LoadControl
control.Text = i.ToString ();
TextBox control = new TextBox ();
myButton.InnerText = “Button 2″;
if (p == null)
System.Web.UI.WebControls.PlaceHolder
PlaceHolder1.Controls.Add (control);
continued to use them, without having to rebuild each page.
load code:
void Page_Load (Object sender, EventArgs e )
Control.Controls collection to add, insert or remove PlaceHolder
through the code, you can project the module folder to see a page that contains a Web User Control (ASCX) The name of the query string parameters
Public Class PlaceHolder
(“modules /” p
runat = “server” />
– such as some “decorative” part: the GIF image header at the horizontal toolbar or navigation bar links on the left, so you can continue

else
Inherits Control
from a Web page to another Web page, your ASP.NET application user interface is often some parts remain the same
“. ascx “));< ??br />
Example
Shared ) members are thread safe. Any instance members are not guaranteed to be thread safe.
For example, you may want to select the user option in the Web

{

sender,
from a Web page to another Web page, your ASP.NET application user interface is often some parts remain the same – such as some “decorative” part: at the GIF image header, horizontal bar or navigation bar links on the left, etc. You can continue to use them, without having to rebuild each page.
In the past, a popular ASP technology is a major part of each page to create an include file, and then build a whole HTML table, table Each unit contains the include files. This approach is feasible, but not pretty, but also error-prone. Fortunately, ASP.NET allows you to use a better way to solve this problem, use a Visual

System.EventArgs e)
AddControlToPlaceHolder ()
Put user code to initialize the page
{
Web User Controls ( ASCX files) to develop all of the pages “content”.

if (! IsPostBack)
PlaceHolder members.

{
2 , a custom user control display

if (p == null)
PlaceHolder1.Controls.Add (wc);
myButton.InnerText = “Button 3″;
Example
i = 0; i <= 5; i )
HTML tables, each table cell contains the include files. This approach is feasible , but not pretty, but also error-prone. Fortunately,
[C ]

HtmlButton myButton = new HtmlButton (); < br /> private void
(“modules /” “Default” “. ascx “));< ??br /> Web controls combined with the use of the Web user controls, for building ASP.NET application to provide a method .
PlaceHolder1.Controls.Add (myButton);
AddControlToPlaceHolder ();
[JScript]
original address: placeholder control Author: tomatoes will PlaceHolder controls dynamically added to the web as a storage server control container. PlaceHolder control does not produce any visible output and can only be used as a container for other controls on the page. You can use
public class PlaceHolder extends Control
/ /
first in VS.NET to create a new ASP.NET Web application. I used the sample code is C #. Creating a Web form, save

thread-safe
PlaceHolder Web
Web applications. I used the sample code is C #. Creating a Web form, save the file with the ASPX extension. I call my main.aspx. This page is only your application Web pages, because you use Web user controls (ASCX files) to develop all of the pages content. ”

Remarks
with the ASPX file extension. I call my main.aspx. This page is only your application Web pages, because you
“. Ascx “));< ??br /> System.EventArgs e)

< % @ Page Language = "C #"
Studio. NET PlaceHolder
PlaceHolder Web control combined with the use of the Web user controls, for building ASP.NET application to provide a method.
add it; For example, you can run to add a Web user control (a modular Web pages). I will talk about how to
myButton.InnerText = "Button 1";

. Then, add the following code to your page in the Page Load event: private void Page_Load (object

("modules /" p ". Ascx "));< br /> controls in the control.
server control allows you to place an empty container control within the page, and then dynamically at run time to add, remove, or loop through child elements. The control only renders its child elements; it does not have its own based on
PlaceHolder1.Controls.Clear ();
myButton = new HtmlButton ();

page variable number of buttons on the display. In this case, the user does not face the choice may lead to confusion, that is, those either not available or has nothing to do with the choice of their own needs.
PlaceHolder1.Controls.Add (LoadControl
control of the control.
where the control is loaded into a PlaceHolder: PlaceHolder1.Controls.Add (myButton);
LiteralControl (”
“));< ??br /> Web Control
(“modules /” “Default”
ASP.NET allows you to use a better way to solve this problem, using a Visual Studio. NET PlaceHolder
else

myButton = new HtmlButton ();
HTML output.
to write one:
System.Object
container for other controls on the page can be stored using
Web page dynamically added server controls on the container.

in MSDN as follows:

PlaceHolder1.Controls.Add (LoadControl
Loaded: http://hi.baidu.com/shijingxin/blog/ item/b45da8345019e7b2d0a2d3dd.html

PlaceHolder
Web control, which controls the other controls as a collection (collection) contains up you can run or add it clear that the collection; For example, you can added at run time a Web user control (a modular Web pages) and I will talk about how to PlaceHolder
for (int
Control.Controls collection to add, insert or remove PlaceHolder

will PlaceHolder control used to store dynamic Web