I am losing my colgroup html element of a table that i toggle back and forth
of being visible=true/false. is there any workaround since the rendered html
doesn't contain it even though it has not been explicitely been made
invisible?

note also that even when the table is made visible=true, colgroup still
doesn't show up

What is the meaning of colgroup with visible=false? What exactly do you want
to achieve? Just note that server controls with visible=false don't render
to the client and don't come back in postbacks.

-- 
Eliyahu Goldin,
Software Developer & Consultant
Microsoft MVP [ASP.NET]
http://msmvps.com/blogs/egoldin


"TS" <manofsteele1@nospam.nospam> wrote in message
news:%23Fj%23%234q2HHA.4184@TK2MSFTNGP06.phx.gbl...

> I am losing my colgroup html element of a table that i toggle back and
forth
> of being visible=true/false. is there any workaround since the rendered
html
> doesn't contain it even though it has not been explicitely been made
> invisible?
>
> note also that even when the table is made visible=true, colgroup still
> doesn't show up
>
>

Hi TS,

From your description, you're using some ASP.NET Table control in aspx 
page(is it asp:Table or  html table control?) and you found that the 
<colgroup> defined in table will not display after you've ever set Table 
control's Visible to "false" ,correct?

As for the <colgroup> since it is html snippet, how did you insert into the 
server  control? Are you using the <asp:Table> server control or <table 
runat="server" > html server control?  Based on my experience, it is 
recommended to use html server control if you want to deal with some pure 
html fragment or some html specific attrribute or style settings on the 
control. Also, for "Visible" property, as "Eliyahu" said, if you set server 
control's "Visible" to "false", ASP.NET won't render it in the output html. 
So I suggest you consider use the css style "display" attribute to hide a 
control. e.g.

===============
 <table id="tb1" runat="server" style="display:none">
  <colgroup></colgroup>
  <colgroup style="background-color:Yellow"></colgroup>
   <tr>
   
    <td>aaaa</td>
   <td>bbbb</td> 
   </tr>
     <tr>
   
    <td>cccc</td>
   <td>dddd</td> 
   </tr>
   </table>
===============

You can set html table control's "display" style to "none" and change it in 
either server-side ASP.NET code or client-side javascript code.

Of course, if convenient, you can post some code snippet so that we can 
also have a look into it. If there is anything we missed, please feel free 
to post here also.

Sincerely,

Steven Cheng

Microsoft MSDN Online Support Lead

 

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hi, I am using html table control with runat=server. Actually the issue is
when i first set the table to invisible, then to visible - the colgroup
doesn't appear. If i wrap the table inside another container control
(another html table) and set it to invisible then visible it works fine.
seems like the colgroup element gets dropped.

"Steven Cheng[MSFT]"  wrote in message
news:Q7ASA%23v2HHA.4100@TK2MSFTNGHUB02.phx.gbl...

> Hi TS,
>
> From your description, you're using some ASP.NET Table control in aspx
> page(is it asp:Table or  html table control?) and you found that the
> <colgroup> defined in table will not display after you've ever set Table
> control's Visible to "false" ,correct?
>
> As for the <colgroup> since it is html snippet, how did you insert into
the
> server  control? Are you using the <asp:Table> server control or <table
> runat="server" > html server control?  Based on my experience, it is
> recommended to use html server control if you want to deal with some pure
> html fragment or some html specific attrribute or style settings on the
> control. Also, for "Visible" property, as "Eliyahu" said, if you set
server
> control's "Visible" to "false", ASP.NET won't render it in the output
html.
> So I suggest you consider use the css style "display" attribute to hide a
> control. e.g.
>
> ===============
>  <table id="tb1" runat="server" style="display:none">
>   <colgroup></colgroup>
>   <colgroup style="background-color:Yellow"></colgroup>
>    <tr>
>
>     <td>aaaa</td>
>    <td>bbbb</td>
>    </tr>
>      <tr>
>
>     <td>cccc</td>
>    <td>dddd</td>
>    </tr>
>    </table>
> ===============
>
> You can set html table control's "display" style to "none" and change it
in
> either server-side ASP.NET code or client-side javascript code.
>
> Of course, if convenient, you can post some code snippet so that we can
> also have a look into it. If there is anything we missed, please feel free
> to post here also.
>
> Sincerely,
>
> Steven Cheng
>
> Microsoft MSDN Online Support Lead
>
>
>
> ==================================================
>
> Get notification to my posts through email? Please refer to
>

http://msdn.microsoft.com/subscriptions/managednewsgroups/default.aspx#notif

> ications.
>
>
>
> Note: The MSDN Managed Newsgroup support offering is for non-urgent issues
> where an initial response from the community or a Microsoft Support
> Engineer within 1 business day is acceptable. Please note that each follow
> up response may take approximately 2 business days as the support
> professional working with you may need further investigation to reach the
> most efficient resolution. The offering is not appropriate for situations
> that require urgent, real-time or phone-based interactions or complex
> project analysis and dump analysis issues. Issues of this nature are best
> handled working with a dedicated Microsoft Support Engineer by contacting
> Microsoft Customer Support Services (CSS) at
> http://msdn.microsoft.com/subscriptions/support/default.aspx.
>
> ==================================================
>
>
> This posting is provided "AS IS" with no warranties, and confers no
rights.
>
>
>
>
>

Hi TS,

Thanks for your reply and the further description.

I have performed some further tests on this and did find the behavior you 
encounter. Actually, this behavior as below:

** as long as you mark the html <table> as "runat=server", it will ignore 
any "<colgroup> elements nesteed in it.
** if you remove the "runat=server", make it a pure html element, it can 
work correctly with <colgroup> or other complex table settings

And this is due to the design limitation of htmltable server control. You 
can also find the description on this in the MSDN document of htmltable 
class:

#HtmlTable Class(in the Note section)
http://msdn2.microsoft.com/en-us/library/system.web.ui.htmlcontrols.htmltabl
e(VS.80).aspx

Therefore, for your scenaro here, I think your current solution that use a 
container server control to wrapper the pure html <table> element should be 
the reasonable approach.  

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.

Hi TS,

Does the further information helps you some? If there is still anything 
need help, 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.