collapsing parts of a page.

Hi,

I have seen on many web sites the ability to collapse/expand sections of 
content. Web site such as face book etc have this feature.

I want to have a section on a page do this, as the content is not always 
needed by the user. If they want to see it they can expand that section, if 
not, then it doesn't take up any space.

Any tips on how to do this ?

Thanks

Date:Wed, 15 Aug 2007 15:28:41 +0100 Author:

RE: collapsing parts of a page.

Hi Aussie,

Regarding on the collapsing parts of the page question you mentioned, I 
think there are two command approach to achive this functionality:

1. Use server-side code to show/hide the certain part of the page.  You can 
put some ASP.NET Panel or html <div> with "runat='server'" setting. Thus, 
you can  use some button or other postback event's code to show and hide 
the certain Panel or Div.

2. If you do not want the page to postback everytime you change the certain 
page fragment's visibility, you can use client script to do the work. The 
css style "display" attribute can be used to show/hide a certain html 
element. I have written a simple test page to demonstrate this, you can 
have a look to see whether it performs as you want:

=======aspx template====================


<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
   <script type="text/javascript" >
   function showhide(btn, divid)
   {
        var div = document.getElementById(divid);
       
       if(btn.value == "-")
       {
            div.style.display = "none";
            btn.value = "+";
       }else
       {
            div.style.display = "";
            btn.value = "-";
       } 
   }
   
   </script> 
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <table style="width:80%;border-width:2pt" >
    <tr>
        <td><input type="button" onclick="showhide(this,'div1');" value="-" 
/>
        <div id="div1" style="border-style:solid;border-width:1pt">
        div1<br />
            <asp:Button ID="Button1" runat="server" Text="Button" /><br />
            <br />
            <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
            <br />
            <asp:Image ID="Image1" runat="server" 
ImageUrl="http://www.bbc.co.uk/radio/i/images/bbc_ws_promo.gif" />
        
       </div>
        </td>
    </tr> 
   <tr>
        <td><input type="button" onclick="showhide(this,'div2');" value="-" 
/>
        <div id="div2" style="border-style:solid;border-width:1pt">
       div2<br />
            <asp:LinkButton ID="LinkButton1" 
runat="server">LinkButton</asp:LinkButton><br />
            <br />
            <asp:Button ID="Button2" runat="server" Text="Button" />
            <br />
            <asp:HyperLink ID="HyperLink1" 
runat="server">HyperLink</asp:HyperLink>
            <asp:Image ID="Image2" runat="server" 
ImageUrl="http://www.bbc.co.uk/radio/i/images/bbc_ws_promo.gif" />
       
       
       </div>
        </td>
    </tr> 
   
    </table>
    </div>
    </form>
</body>
</html>
==================================

Sincerely,

Steven Cheng

Microsoft MSDN Online Support Lead

 

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Date:Thu, 16 Aug 2007 03:02:39 GMT Author:

RE: collapsing parts of a page.

Hi Aussie,

Does the suggestion in my last reply helps some? If you have any further 
questions on this, please feel free to post here.

Sincerely,

Steven Cheng

Microsoft MSDN Online Support Lead


This posting is provided "AS IS" with no warranties, and confers no rights.

Date:Mon, 20 Aug 2007 10:13:41 GMT Author: