Question

I’m trying to grab a div’s ID in the code behind (C#) and set some css on it. Can I grab it from the DOM or do I have to use some kind of control?

<div id='formSpinner'>     <img src='images/spinner.gif' />     <p>Saving...</p> </div> 

Answer 1

Add the runat='server' attribute to it so you have:

<div id='formSpinner' runat='server'>     <img src='images/spinner.gif'>     <p>Saving...</p> </div> 

That way you can access the class attribute by using:

formSpinner.Attributes['class'] = 'classOfYourChoice'; 

It’s also worth mentioning that the asp:Panel control is virtually synonymous (at least as far as rendered markup is concerned) with div, so you could also do:

<asp:Panel id='formSpinner' runat='server'>     <img src='images/spinner.gif'>     <p>Saving...</p> </asp:Panel> 

Which then enables you to write:

formSpinner.CssClass = 'classOfYourChoice'; 

This gives you more defined access to the property and there are others that may, or may not, be of use to you.