--- The User control -------
<%@ Control Language="c#" AutoEventWireup="false" Codebehind="WebUserControl1.ascx.cs" Inherits="project.WebUserControl1" TargetSchema="http://schemas.microsoft.com/intellisense/ie5"%>
//some html here
<asp:PlaceHolder id="cPlaceHolder1" runat="server"></asp:PlaceHolder>
----- code in this user control ----
protected System.Web.UI.WebControls.PlaceHolder plhMainContent;
public ControlCollection ContentControlCollection
{
get { return plhMainContent.Controls; }
}
---- another user control with validator -----
<%@ Control Language="c#" AutoEventWireup="false" Codebehind="LoginControl.ascx.cs" Inherits="project.controls.LoginControl" TargetSchema="http://schemas.microsoft.com/intellisense/ie5" %>
//some html
<asp:TextBox ID="txtUserName" MaxLength="10" runat="server" />
<asp:RequiredFieldValidator ID="UserNameValidator" ControlToValidate="txtUserName" Display="Dynamic" ErrorMessage="User Name is Blank"
Text="User Name cannot be blank" runat="server" />
----- the page which use both controls above ------
<%@ Register TagPrefix="project" TagName="LoginControl" Src="controls/LoginControl.ascx" %>
<%@ Page language="c#" Codebehind="login.aspx.cs" AutoEventWireup="false" Inherits="project.login" %>
<%@ Register TagPrefix="uc1" TagName="PageTempControl" Src="controls/PageTempControl.ascx" %>
<uc1:PageTempControl id="PageTempControl1" runat="server"></uc1:PageTempControl>
<asp:Panel id="Panel1" runat="server">
<project:LoginControl id="UserLogin" runat="server"></project:LoginControl>
//some other html and controls in this panel
</asp:Panel>
------- the page's code ----
private void Page_Load(object sender, System.EventArgs e)
{
// set up the login action
UserLogin.RegisterLoginFunction(new System.EventHandler(DoLogin));
// addd the panel to the page
this.PageTempControl1.ContentControlCollection.Add(this.Panel1);
}
private void DoLogin(object sender, System.EventArgs e) // method defines how to perform login
Ths reason for I design the page like this is that I want to have a frame control which has a general html frame of the whole site, this frame control should contains a place holder and different contant could be added dynamicly. E.g. for the register page, i just add a RegControl and for the login page, i just add a LoginControl.
Further than above, I have write a class call BasePage, which override the render method so that i could design the <head> of all the pages, this base page class has a HtmlForm object and it is render in the Render method like this:
frmMainForm.RenderControl(writer);
A placeholder is add to the form and public to others
public BasePage()
{
frmMainForm = new HtmlForm();
this.Controls.Add(frmMainForm);
holder = new PlaceHolder();
this.frmMainForm.Controls.Add(holder);
}
public ControlCollection ContentControlCollection
{
get { return holder.Controls; }
}
BUTTTTTTT, what I want is , rather than add the place holder here, I holp to add the PageTempControl here and and page inherits from this BasePage can use the ContentControlCollection method and add the content to it.