Empty the contents of a textarea after submit [duplicate]

Question

I have a comment box (textarea) inside a dialog. If the comment is successfully saved I want to clear the contents of the textarea and close the dialog box. ATM the dialog box will close but I need to wipe its contents.

<textarea id="CommentBox" type="text" runat="server" rows="7" 
maxlength="2000" /> 

if (CommentSuccessfullyUpdated == "TRUE") 
{
//empty the comment box??
//something like
$("#CommentBox").empty();

//closes the dialog box
$("#dialog").dialog('close');

Thanks for any replies

---

Edit: Thanks for the help guys. It is running through the code but its not working. I think it has to do with in order to pick up the correct vales and resolve a biding issue I had to use:

 function SubmitButton() {
            var commentBoxData = $('#<%=CommentBox.ClientID%>').val();
           }

When run through with a breakpoint returns:

function SubmitButton() {
            var commentBoxData = $('#ctl00_ContentPlaceHolder1_CommentBox').val();
}

AND:

<textarea name="ctl00$ContentPlaceHolder1$CommentBox" id="ctl00_ContentPlaceHolder1_CommentBox" type="text" rows="7" maxlength="2000"> </textarea> 

So Im guessing im not referencing the same textarea when I try to empty it. Also tried

$("#CommentBox.ClientID").val('');

but no joy....ay ideas?

Answer 1

$('#CommentBox').val('');

Use the val() method, passing in an empty string.

Documentation: http://api.jquery.com/val

Also, your mark up is wrong. textarea isn't a self-closing element. You need a </textarea> tag. And the type="text" isn't necessary (probably not actually valid either)

As per your edit, you can either set the IDs to be static at the top of your .aspx file (I think it's ClientID="static")

Or you can use a different selector:

$('textarea').filter('[id*=CommentBox]').val('');

Answer 2

You can use val:

$("#CommentBox").val('');

http://api.jquery.com/val/

JSFiddle

http://jsfiddle.net/KhPM6/1/

Edit:

You are not referencing the ASP.NET generated text area correctly. As you have shown in your question, you need to reference it like:

$('#<%=CommentBox.ClientID%>').val('');

Answer 3

   $('textarea#CommentBox').val('');