Re: Viewstate Issue?
From: Robert Koritnik (robert.koritnik.removethis_at_avtenta.si)
Date: 06/24/04
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Date: Thu, 24 Jun 2004 09:31:59 +0200
Put PersistChildren and ParseChildren attributes on the class. you can check
the usage on MSDN. Probably this should work fine:
ParseChildren(true),
PersistChildren(false)
--
RobertK
{ Clever? No just smart. }
"SS" <stephen@acsalaska.com> wrote in message
news:eTNx92WWEHA.3492@TK2MSFTNGP10.phx.gbl...
> Hi,
> I've build a custom control that's essentially a header for my web site.
> It's pretty simple, with just a property for an image source path, and a
> collection of custom objects for links.
>
> The custom class simply has properties for href, target, and name. The
> collection implements CollectionBase.
>
> The elements of the collection are persisted as innerdefaultproperties, so
> within the tag for the custom control, child elements are present
> representing my custom link objects.
>
> The control's render method uses HtmlTextWriter.AddAttribute and
> RenderBeginTag/RenderEndTag methods to produce the html. Within the render
> method, a foreach loop goes through my collection and renders anchor tags
> with the appropriate attributes.
>
> When I place the header control onto a web page, it renders fine. I can
edit
> the collection of 'links' with the stock design-time editor, and the links
> render perfectly when as I add or remove links from the collection.
>
> The problem is, when I do a build on my web app (the page) the page
> 'refreshes' in the design view, and my links have disappeared. The HTML
view
> (in VS) still shows the child elements for the links I added, but when I
> switch back to design view, they don't render (no errors, just acts like
the
> don't exist). Indeed, when I click on the "..." to open up the collection
> editor, it's empty, even though the HTML is still there.
>
> I haven't even gotten to where I'm rendering this in a browser, since I
> can't get it to hold on to links through the build process. Any ideas on
> what I'm doing wrong here? I've been thinking that perhaps I need to build
> some viewstate management code, but then I also think that this shouldn't
be
> an issue for the particular problem I'm having -- not getting my
collection
> to get rerendered in the designer after a build..
>
> Thanks for any help!
>
> Here's my render method:
> protected override void Render(HtmlTextWriter output)
> {
> output.AddAttribute(HtmlTextWriterAttribute.Id,"tblHeader");
> output.AddAttribute(HtmlTextWriterAttribute.Border,"0");
> output.AddAttribute(HtmlTextWriterAttribute.Cellpadding, "0");
> output.AddAttribute(HtmlTextWriterAttribute.Cellspacing, "0");
> output.AddStyleAttribute(HtmlTextWriterStyle.Width, "100%");
> output.RenderBeginTag(HtmlTextWriterTag.Table);
>
> // Begin Table Row
> output.RenderBeginTag(HtmlTextWriterTag.Tr);
> // Begin Image Cell
> output.AddStyleAttribute(HtmlTextWriterStyle.Height,"121");
> output.AddAttribute(HtmlTextWriterAttribute.Valign, "top");
> output.RenderBeginTag(HtmlTextWriterTag.Td);
> output.AddAttribute(HtmlTextWriterAttribute.Src,this.ImageSrc);
> output.AddAttribute(HtmlTextWriterAttribute.Border,"0");
> output.AddAttribute(HtmlTextWriterAttribute.Alt,"Home");
> output.RenderBeginTag(HtmlTextWriterTag.Img);
> output.RenderEndTag();
> output.RenderEndTag();
> // End Image Cell
> // Begin Empty Cell
> output.AddStyleAttribute(HtmlTextWriterStyle.Height,"121");
> output.AddAttribute(HtmlTextWriterAttribute.Valign, "top");
> output.RenderBeginTag(HtmlTextWriterTag.Td);
> output.Write(@" ");
> output.RenderEndTag();
> // End Empty Cell
> // Begin Data Cell
> output.AddStyleAttribute(HtmlTextWriterStyle.Height,"121");
> output.AddAttribute(HtmlTextWriterAttribute.Valign, "top");
> output.RenderBeginTag(HtmlTextWriterTag.Td);
> output.AddAttribute(HtmlTextWriterAttribute.Id,"lblDate");
> output.RenderBeginTag(HtmlTextWriterTag.Span);
> output.WriteLine(DateTime.Now.ToShortDateString());
> output.RenderEndTag();
> output.RenderEndTag();
> output.RenderEndTag();
> // End Data Cell
>
> // Begin Table Row
> output.RenderBeginTag(HtmlTextWriterTag.Tr);
> // Begin Link Cell
> output.AddAttribute(HtmlTextWriterAttribute.Colspan,"3");
> output.AddAttribute(HtmlTextWriterAttribute.Valign,"top");
> output.AddAttribute(HtmlTextWriterAttribute.Align,"left");
>
output.AddAttribute(HtmlTextWriterAttribute.Class,this.HeaderMenuClass);
> output.RenderBeginTag(HtmlTextWriterTag.Td);
> foreach (CustomLink objLink in this.Links)
> {
> output.AddAttribute(HtmlTextWriterAttribute.Class,
> (objLink.CssClass.Length > 0) ? objLink.CssClass : this.LinkClass);
> output.AddAttribute(HtmlTextWriterAttribute.Href,objLink.NavigateUrl);
> output.AddAttribute(HtmlTextWriterAttribute.Target,objLink.Target);
> output.AddAttribute(HtmlTextWriterAttribute.Alt, objLink.ToolTip);
> output.RenderBeginTag(HtmlTextWriterTag.A);
> output.Write(objLink.Text);
> output.RenderEndTag();
> }
> output.RenderEndTag();
> // End Link Cell
> output.RenderEndTag();
> // End Table Row
> }
>
>
- Next message: Cappy: "Re: viewstate for collapsable panel control"
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- In reply to: SS: "Viewstate Issue?"
- Next in thread: Teemu Keiski: "Re: Viewstate Issue?"
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