Hi thanks for your response.
I have been looking at what you suggested but still cant get it to
work.
I have done the javascript part that populates a hidden text box with
the current state.. but I can to the postback data handler part.
The control renders the hidden text box like this
writer.AddAttribute(HtmlTextWriterAttribute.Type, "hidden");
writer.AddAttribute(HtmlTextWriterAttribute.Value,
Collapsed.ToString());
writer.AddAttribute(HtmlTextWriterAttribute.Id,thi s.UniqueID+
"_collapsedstate");
writer.RenderBeginTag(HtmlTextWriterTag.Input);
writer.RenderEndTag();
then I have the LoadPostData method as follows
public bool LoadPostData(string postDataKey,
System.Collections.Specialized.NameValueCollection postCollection)
{
// TODO: Add CorpPanel.LoadPostData implementation
Collapsed = Convert.ToBoolean(postCollection[this.UniqueID +
"_collapsedstate"]);
return false;
}
but it doesnt work. I have debuged the code and the loadpostdata
method doesnt even seem to fire on post back
Thanks
Amit
"Teemu Keiski" <> wrote in message
news:<>...
> Hi,
>
> one way could be that at client-side the script writes the collapsed state
> to an hidden input field, which your control reads on postback. You'd
> probably want to implement postback datahandling for it
> (IPostBackDataHandler interface). When it reads that say 'collapsed' is
> posted within the hidden form field, it could set the Collapsed property to
> true and when such is not posted, it of course sets the property to false.
>
> Here is an example of IPostBackDataHandler:
> http://msdn.microsoft.com/library/de...ClassTopic.asp
> (watch for wrapping)
>
> --
> Teemu Keiski
> MCP, Microsoft MVP (ASP.NET), AspInsiders member
> ASP.NET Forum Moderator, AspAlliance Columnist
> http://blogs.aspadvice.com/joteke
>
>
>
> "Cappy" <> wrote in message
> news: om...
> > Hi.
> >
> > I have built a custom control for a collapseable panel. The panel has
> > an image to which when clicked, fires a client side javascript
> > function that shows or hides the panel using DHTML. This javascript
> > funciton is registered to the page on render
> > This works fine for me except that when a post back occurs for any
> > reason, because the show/hide all occurs client side, the control
> > doesnt remember its collapsed state.
> >
> > I think what I need to do is register an event to the collapse image
> > thats sets a collapsed propety which is stored in the view state.
> >
> > I have a property as follows to hold the collapsed state.
> >
> > [Bindable(true),
> > Category("Appearance"),
> > DefaultValue("false")]
> >
> > public bool Collapsed
> > {
> > get
> > {
> > if(ViewState["Collapsed"] == null) return false;
> > return Convert.ToBoolean(ViewState["Collapsed"]);
> > }
> > set
> > {
> > ViewState["Collapsed"] = value;
> > }
> > }
> >
> > What I need to know is.. how do I make my collapse image button set
> > this property. Currently.. my image button looks like this.
> >
> > writer.AddAttribute(HtmlTextWriterAttribute.Name,
> > "Collapse"+this.UniqueID);
> > //If started collapsed, show expand image if available, else collapse
> > image.
> > if ((Collapsed) && (expandImg.Length > 0))
> > {
> > writer.AddAttribute(HtmlTextWriterAttribute.Src, expandImg);
> > }
> > else
> > {
> > writer.AddAttribute(HtmlTextWriterAttribute.Src, collapseImg);
> > }
> > //Javascript Onlick function to show or hide panel body
> >
> writer.AddAttribute(HtmlTextWriterAttribute.Onclic k,"toggle('"+this.UniqueID
> +
> > "_collapse','"+this.UniqueID+"')");
> >
> > writer.AddAttribute("hspace","3");
> > //If mouse over add js
> > if (collapseOnImg.Length > 0)
> > {
> > writer.AddAttribute("onMouseOver", "ImgH.swap(this,'Collapse"+
> > this.UniqueID +"On');");
> > writer.AddAttribute("onMouseOut", "ImgH.fade(this,'Collapse"+
> > this.UniqueID +"Off');");
> > }
> > writer.RenderBeginTag(HtmlTextWriterTag.Img);
> > writer.RenderEndTag();
> >
> > how do I make this image set the property of the control on click?
> >
> > Regards
> > Amit
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