Creating a CSS class programmatically ASP.Net

Question

I have a DIV that I would like to modify the CSS for programmatically in VB.Net/C#.

I know that, for example, I could add style attributes simply by

divMyDiv.Style.add("color","#ff0000")

but I want to add a new CSS class, together with its attributes to the DIV. So in an ideal world I would like to write something like

divMyDiv.Style.add(".smallRedText", "{font-size:10px; color:#ff0000}")

Is this even possible ? Am I missing the bigger picture ?

All help gratefully received :-)

Is there a reason you don't predefine the classes and just change the class programmaticly? — Yao Bo Lu
– Yao Bo Lu, Commented Jan 16, 2014 at 11:17
That would work - but how do I change the class programmatically ? — Polecat Harris
– Polecat Harris, Commented Jan 16, 2014 at 11:36

Joe Ratzer · Accepted Answer · 2014-01-16 11:17:46Z

1

What about:

divMyDiv.Attributes.Add("class", "new-class")

answered Jan 16, 2014 at 11:17

Joe Ratzer

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Comments

Justin Skiles · Accepted Answer · 2014-01-16 11:17:51Z

0

I suggest that you define the variations in css ahead of time that you know you'll need. Then, you can manipulate the class attribute of whatever control you need to change on the fly.

For example, you could define:

.smallRedText { font-size: 10px; color: #ff0000 }
.smallBlueText { font-size: 10px; color: #0000ff }

Then when comes time to select dynamically:

divMyDiv.Attributes.Add("class", whateverClassWeNeed);

answered Jan 16, 2014 at 11:17

Justin Skiles

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2 Comments

Polecat Harris Over a year ago

Thanks - but what if I want to, for example, change the definition of smallRedText so that the font size was 11px ?

Justin Skiles Over a year ago

I am fairly certain that will require JavaScript. I know you can access stylesheets in the DOM through document.styleSheets, but I don't have experience using it.

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