change table cell style in vb code

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Keith G Hicks - 19 Mar 2008 05:14 GMT

asp.net 2.0 using vwd

I'm trying to chagne the border of a table cell in my vb code but cannot
seem to do it. The cell has an ID of "tdAlert"

If txtAlert.Text <> "" Then
tdAlert.Style = "width: 547px; border-left-color: red;
border-bottom-color:
red; border-top-style: solid; border-top-color: red; border-right-style:
solid; border-left-style: solid; border-right-color: red;
border-bottom-style: solid;"
Else
tdAlert.Style = "width: 547px;"
End If

apparently tdAlert doesn't exist. I've saved the project thinking that maybe
intellisense would not find it if I didn't save it with the new ID but that
didnt' solve the problem. Any ideas on how this can be done? I just need a
red border around the cell under certain conditions.

Thanks,

Keith

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Anthony Jones - 19 Mar 2008 10:02 GMT

> asp.net 2.0 using vwd
>
[quoted text clipped - 15 lines]
> didnt' solve the problem. Any ideas on how this can be done? I just need a
> red border around the cell under certain conditions.

In order to access the td as ASP.NET control it needs, in addition to an id
attribute, a runat="server" attribute. This makes it a HtmlTableCell.

You can not assign a style string directly since its an instance of
CssStyleCollection. This isn't a good approach anyway. A css class would
be better. The HtmlTableCell doesn't expose a CssClass attribute so you
need to add it via the Attributes collection.

The HtmlTableCell has a Width property so you can assign the 547px width to
that property.

Add the following mark up to your <head>:-

<style type="text/css">
td.highlight {border:1px solid red;}
</style>

Then your code becomes:-

If txtAlert.Text <> "" Then

tdTest.Attributes.Add("class", "highlight");

Else

tdTest.Attributes.Remove("class");

End If

Signature

Anthony Jones - MVP ASP/ASP.NET

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Keith G Hicks - 20 Mar 2008 00:28 GMT

Thanks Anthony. That worked. But I had to do some more research because I
still was unable to access my table cell in code:

http://www.velocityreviews.com/forums/t372741-how-to-access-html-controls-fr
om-code-behind-.html (Imports
System.Web.UI.HtmlControls)

Works fine now.

Keith

> > asp.net 2.0 using vwd
> >
[quoted text clipped - 50 lines]
> --
> Anthony Jones - MVP ASP/ASP.NET

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Eliyahu Goldin - 19 Mar 2008 10:05 GMT

Show how you define tdAlert in the .aspx page.

Signature

Eliyahu Goldin,
Software Developer
Microsoft MVP [ASP.NET]
http://msmvps.com/blogs/egoldin
http://usableasp.net

> asp.net 2.0 using vwd
>
[quoted text clipped - 22 lines]
>
> Keith

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change table cell style in vb code

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