Adding css class through aspx code behind

Question

I am using aspx. If I have HTML as follows:

<div id="classMe"></div>

I am hoping to dynamically add a css class through the code behind file, ie on Page_Load. Is it possible?

Thanks coders.

Answer 1

If you want to add attributes, including the class, you need to set runat="server" on the tag.

    <div id="classMe" runat="server"></div>

Then in the code-behind:

classMe.Attributes.Add("class", "some-class")

Answer 2

If you're not using the id for anything other than code-behind reference (since .net mangles the ids), you could use a panel control and reference it in your codebehind:

<asp:panel runat="server" id="classMe"></asp:panel>

classMe.cssClass = "someClass"

Answer 3

controlName.CssClass="CSS Class Name";

working example below

txtBank.CssClass = "csError";