RadTextBox updateCssClass not updating

[Marbry]

It's really a two part problem.  This is what I'm doing,

I call this on the server to set the background color if the input was not considered valid.

textboxname.Style.Add(HtmlTextWriterStyle.BackgroundColor, "red");

Then in a handler for the ClientEvents-OnKeyPress event I call this to set the background color back.

sender.get_styles().EnabledStyle[0] = sender.get_styles().EnabledStyle[0].replace("background-color:red;", "");
sender.updateCssClass();

The first problem is that the background color doesn't change until the focus is moved off the text box, when I want it to occur as soon as the user types something into it.

The second problem is that the color does change if you click off the box, but then it flashes back to red if you mouseover the box and as long as you hold the cursor there.  Mouseout, it goes back to white, back and forth.

[Tsvetina]

Hello Marbry,

Unless you have some custom code that checks whether the values is correct on keydown or keypress, the style cannot be updated faster, since the built-in validation of RadTextBox runs when it is blurred out.
As for changing the styles, you should also change HoveredStyle[0] in order to make the change apply in the case of a mouse over state of the control.

More information on the different styles and the states of the textbox when they are applied is available here:
InputStyles Client Object

Kind regards,
Tsvetina
the Telerik team

[Marbry]

Thanks Tsvetina, that worked a charm.

I was already calling that from the client keypress event, but I had to also set the FocusedStyle[0] in addition to the HoveredStyle[0] as you mentioned.