Re: Template data is not being replaced in a Templated ASP.NET server control...

Mike Andrews <[email protected]> Fri, 30 Mar 2007 09:44:58 -0500
Newsgroups	gmane.comp.windows.devel.dotnet.web
Message-ID	<[email protected]>
Adam,

Thank you for your replies.

However, I cannot get any of your examples to work.  I still the get same
effect as before.
One of the things I specifically tried was the <%# Container.GetType().Name
%> and it worked as before.
It's replaced with nothing instead of the name of the object.

Were you able to get them to work in your environment?

Thanks,
Mike


On 3/29/07, Adam Sills <[email protected]> wrote:
>
> Your code modified. Note all I've done is change what's in the <%# %>
> block
> and make ScannerControl inherit from CompositeControl.
>
> .aspx:
>
> <cc1:ScannerControl id="ScannerControl1_1" runat="server">
>    <Template>
>        <h1><%# Container.GetType().Name %></h1>
>    </Template>
> </cc1:ScannerControl>
>
> Scanner control:
>
> [ToolboxData( "<{0}:ScannerControl runat=server></{0}:ScannerControl>" )]
> public class ScannerControl : CompositeControl {
>        private ITemplate _template;
>
>        [TemplateContainer( typeof( MyContainer ) )]
>        [PersistenceMode( PersistenceMode.InnerProperty )]
>        public ITemplate Template {
>                get { return _template; }
>                set { _template = value; }
>        }
>
>        protected override void CreateChildControls() {
>                this.Controls.Clear();
>                if( this.Template != null ) {
>                        MyContainer mc = new MyContainer( "The default
> container text!" );
>                        this.Controls.Add( mc );
>                        this.Template.InstantiateIn( mc );
>                }
>                base.CreateChildControls();
>        }
> }
>
> -----Original Message-----
> From: Discussion of building .NET applications targeted for the Web
> [mailto:[email protected]] On Behalf Of Mike Andrews
> Sent: Thursday, March 29, 2007 4:06 PM
> To: [email protected]
> Subject: Re: [DOTNET-WEB] Template data is not being replaced in a
> Templated
> ASP.NET server control...
>
> Thanks for the response Adam.
>
> Would you be able to provide an example?
> I'm not sure what you mean about the DataBind on the scanner control.
>
> Thanks,
> Mike
>
>
> On 3/29/07, Adam Sills <[email protected]> wrote:
> >
> > You have two problems.
> >
> > 1. You're not calling DataBind on your scanner control
> > 2. WebControl by itself does not loop through its child controls and
> call
> > DataBind on them in its DataBind call. You need to do that yourself or
> > inherit from CompositeControl instead.
> >
> > Adam..
> >
> > -----Original Message-----
> > From: Discussion of building .NET applications targeted for the Web
> > [mailto:[email protected]] On Behalf Of Mike Andrews
> > Sent: Thursday, March 29, 2007 3:47 PM
> > To: [email protected]
> > Subject: [DOTNET-WEB] Template data is not being replaced in a Templated
> > ASP.NET server control...
> >
> > Guys,
> >
> > I'm really lost now.  I cannot, I repeat cannot, get the data in my
> > container control that represents the template to work.
> > If you notice in my markup, I have this: <%# Container.Text %>.  When
> the
> > template control is created (MyContainer) and I call the Instantiate,
> this
> > value is not replaced with the message "The default container text!" as
> it
> > should have been, but instead is replaced with nothing.
> >
> > Any help would be most appreciated.  I'm really at my wits end with this
> > one.
> >
> > Thanks,
> > Mike
> >
> > Here's my asp.net markup:
> >
> > <%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs
> "
> > Inherits="_Default" %>
> > <%@ Register Assembly="Scanner" Namespace="Scanner" TagPrefix="cc1" %>
> > <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "
> > http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
> > <html xmlns="http://www.w3.org/1999/xhtml" >
> > <head runat="server">
> >    <title>Untitled Page</title>
> > </head>
> > <body>
> >    <form id="form1" runat="server">
> >    <div>
> >        <cc1:ScannerControl id="ScannerControl1_1" runat="server">
> >            <Template>
> >                <h1><%# Container.Text %></h1>
> >            </Template>
> >        </cc1:ScannerControl>
> > </div>
> >    </form>
> > </body>
> > </html>
> >
> >
> > Here's the result of the page when it's run:
> >
> > <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "
> > http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
> > <html xmlns="http://www.w3.org/1999/xhtml" >
> > <head><title>
> > Untitled Page
> > </title></head>
> > <body>
> >    <form name="form1" method="post" action="Default.aspx" id="form1">
> > <div>
> > <input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE"
> > value="/wEPDwUJNTgwMjcwMjU1ZGTpLl3HHZKhrXybhi5mD/cUEBCBwQ==" />
> > </div>
> >    <div>
> >        <span id="ScannerControl1_1">
> >                <h1></h1>
> >            </span>
> > </div>
> >    </form>
> > </body>
> > </html>
> >
> >
> > Here is a really scaled down version of my code:
> >
> >
> >    [ToolboxData("<{0}:ScannerControl
> runat=server></{0}:ScannerControl>")]
> >    public class ScannerControl : WebControl {
> >        private ITemplate _template;
> >        [TemplateContainer(typeof(MyContainer))]
> >        [PersistenceMode(PersistenceMode.InnerProperty)]
> >        public ITemplate Template {
> >            get { return _template; }
> >            set { _template = value; }
> >        }
> >
> >        protected override void CreateChildControls() {
> >            this.Controls.Clear();
> >            if (this.Template != null) {
> >                MyContainer mc = new MyContainer("The default container
> > text!");
> >                this.Template.InstantiateIn(mc);
> >                this.Controls.Add(mc);
> >            }
> >            base.CreateChildControls();
> >        }
> >    }
> >
> >    public class MyContainer : Control, INamingContainer {
> >        public MyContainer(string text) {
> >            this.Text = text;
> >        }
> >
> >        private string _text;
> >        public string Text {
> >            get { return _text; }
> >            set { _text = value; }
> >        }
> >    }
> >
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