"Steven Cheng[MSFT]" wrote:

> Hi Buzz,
>
> Does my last reply helps a little? If you have anything unclear or anything
> else we can help, please feel free to post here.
>
> Regards,
>
> Steven Cheng
> Microsoft Online Support
>
> Get Secure! www.microsoft.com/security
> (This posting is provided "AS IS", with no warranties, and confers no
> rights.)
> --------------------
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> | From: stcheng@online.microsoft.com (Steven Cheng[MSFT])
> | Organization: Microsoft
> | Date: Mon, 26 Dec 2005 08:37:19 GMT
> | Subject: RE: Composite Web Control and saving user changes on child
> controls.
> | X-Tomcat-NG: microsoft.public.dotnet.framework.aspnet.buildingcontrols
> | Message-ID: <#YgpcefCGHA.2636@TK2MSFTNGXA02.phx.gbl>
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> microsoft.public.dotnet.framework.aspnet.buildingcontrols:14169
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> |
> | Hi Buzz,
> |
> | As for ASP.NET custom webserver control, if we're developing through the
> | composite control means, we need to pay attention to the following things:
> |
> | 1. Since our custom webserver control will contains multiple sub server
> | controls, we need to assign a unique control ID for each of them....
> | Thus, we can ensure that the sub controls has a certain ID to idenitify
> | them. It is not only important for the runtime service such as ViewState
> or
> | postbacking event mapping but also important for ourselves(we may need
> to
> | use FindControl to reference subcontrols....) So please explicitly
> assign
> | each child control a unique ID value.... (don't let the runtime create a
> | random one....) e.g:
> |
> |
> | protected override void CreateChildControls()
> | {
> | CheckBox checkBox = new CheckBox();
> | checkBox.ID = "chkSub";
> | Controls.Add(checkBox);
> | checkBox.Text = "Confused";
> |
> | base.CreateChildControls();
> | }
> |
> |
> | 2. For custom composite control , we also need to make it implement the
> | INamingContainer interface. This interface dosn't contains any method
> that
> | need to implement but used to indicate that this control is a
> | NamingContainer, so all the sub controls in its controls collection will
> | have a unique identity over the whole Page scope (thus, the child
> controls'
> | ID in this control won't conflict with those in other controls' child
> | control collectoin). e.g:
> |
> | public class WebCustomControl1 : System.Web.UI.WebControls.WebControl,
> | INamingContainer
> | {
> |
> |
> | #INamingContainer Interface
> |
> http://msdn.microsoft.com/library/en-us/cpref/html/frlrfsystemwebuiinamingco
> | ntainerclasstopic.asp?frame=true
> |
> | Hope helps. Thanks,
> |
> | Steven Cheng
> | Microsoft Online Support
> |
> | Get Secure! www.microsoft.com/security
> | (This posting is provided "AS IS", with no warranties, and confers no
> | rights.)
> |
> |
> |
> |
> |
> | --------------------
> | | Thread-Topic: Composite Web Control and saving user changes on child
> | controls.
> | | thread-index: AcYIAt2VNMlq0d4yTBu2rx77O7RIoQ==
> | | X-WBNR-Posting-Host: 192.41.148.220
> | | From: "=?Utf-8?B?QnV6eg==?=" <buzz@online.nospam>
> | | Subject: Composite Web Control and saving user changes on child
> controls.
> | | Date: Fri, 23 Dec 2005 12:53:02 -0800
> | | Lines: 71
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> | microsoft.public.dotnet.framework.aspnet.buildingcontrols:14162
> | | X-Tomcat-NG: microsoft.public.dotnet.framework.aspnet.buildingcontrols
> | |
> | | Okay, having the same problem many others are having.
> | |
> | | Here is a simple example I cannot get to work:
> | |
> | | -- using C#
> | |
> | | a) Created an ASP.NET Web Project.
> | |
> | | b) Added a Web Control Library project to the solution calling the
> | project
> | | CustomControlLibrary.
> | |
> | | c) I've tried a few different things but this is the latest of what my
> | | WebCustomControl1.cs file looks like this:
> | | using System;
> | | using System.Web.UI;
> | | using System.Web.UI.WebControls;
> | | using System.ComponentModel;
> | |
> | | namespace CustomControlLibrary
> | | {
> | | /// <summary>
> | | /// Summary description for WebCustomControl1.
> | | /// </summary>
> | | [DefaultProperty("Text"),
> | | ToolboxData("<{0}:WebCustomControl1
> | runat=server></{0}:WebCustomControl1>")]
> | | public class WebCustomControl1 : System.Web.UI.WebControls.WebControl
> | | {
> | | private System.Web.UI.WebControls.CheckBox checkBox;
> | |
> | | /// <summary>
> | | /// Render this control to the output parameter specified.
> | | /// </summary>
> | | /// <param name="output"> The HTML writer to write out to </param>
> | | protected override void Render(HtmlTextWriter output)
> | | {
> | | base.Render(output);
> | | }
> | |
> | |
> | | protected override void CreateChildControls()
> | | {
> | | checkBox = new CheckBox();
> | | Controls.Add(checkBox);
> | | checkBox.Text = "Confused";
> | |
> | | base.CreateChildControls();
> | | }
> | |
> | | }
> | | }
> | |
> | | d) I compiled the solution and then added my CustomControlLibrary to
> the
> | web
> | | toolbox.
> | |
> | | e) I dragged and dropped WebCustomControl1 onto WebForm1.aspx.
> | |
> | | f) I also dragged and dropped a textbox and button onto WebForm1.aspx.
> | |
> | | g) I run the solution. I see the checkbox, textbox and button.
> | |
> | | h) I click the checkbox so it is checked, I type "a" in the textbox and
> | then
> | | I press the button.
> | |
> | | i) The page posts back. I see the "a" in the textbox but the checkbox
> is
> | now
> | | unchecked.
> | |