I need to put a new CSS from ASP.NET how to do it

Question

I need to put a new CSS from ASP.NET when the image button Control comes dynamically

Answer 1

What exactly do you mean "imag[e] butt[o]n Control comes dynamically"?

You can add css to individual controls from code-behind via Attributes property, e.g.:

ImageButton1.Attributes.Add("style", "height:30px");

You can add a whole stylesheet to a page, e.g.:

System.Web.UI.HtmlControls.HtmlLink myHtmlLink = new System.Web.UI.HtmlControls.HtmlLink();
myHtmlLink.Href = "/css/my.css";
myHtmlLink.Attributes.Add("rel", "stylesheet");
myHtmlLink.Attributes.Add("type", "text/css");

Or you can do it via javascript, jQuery example:

$('img.myImage').attr('style', 'height:30px');