pass javascript value to label

annieapple · July 17th, 2003, 05:52 AM

I need to pass value from a javascript function to a label in an asp/aspx page.
I cannot find information on this anywhere,
has this been done before

can anybody help

bosboom · July 17th, 2003, 06:10 AM

The only way to do this is to load a .asp page in a browser, so i suggest to use a <iframe> or hidden frame in your page and load the page which updates the value with javascript like so:

hiddenframe.location.href="yourpage.asp?value=your value"

GreetZ

Bosboom

joefawcett · July 17th, 2003, 07:52 AM

If you mean change an asp:label control from client-side JavaScript without posting then you need to know the clien-side id of the control. A label control is only an HTML span element. I believe you can set this server-side using clientID property.
Then in your client-side JavaScript

Code:

  function setLabelText(ID, Text)
  {
    document.getElementById(ID).innerHTML = Text;
  }

Then call this function from somewhere, assuming id is "ctrl1"::

Code:

  setLabelText("ctrl1", "Hello, World.");

--

Joe

dpreethi · August 30th, 2006, 02:29 PM

that was helpful...

it works!!!

nacram1 · July 3rd, 2008, 12:55 AM

how do i access the innerText or the innerHTML property of a label using the C# code behind ? please let me know

Old Pedant · July 3rd, 2008, 03:45 PM

Don't reply to very old posts with an essentially unrelated question.

And in any case, you should have posted this in the C# forum.

But whatever...

The simple answer: YOU DON'T.

C# code *ON THE SERVER* can *ONLY* see information that is passed to it FROM A FORM on the client. So you would have to use JavaScript in the HTML page to copy the innerHTML value to a form field (presumably, a HIDDEN form field) so that the server could the read it.

Incidentally, innerText is not supported in all browsers. You probably should stick with innerHTML.

nacram1 · July 4th, 2008, 03:06 AM

i'm new to this forum. I'm a bit annoyed to see this kinda rude reply !! Thanks for the reply anyways ... and this was an essentially related question.

Old Pedant · July 5th, 2008, 04:04 PM

Even if you saw your question as related to the old thread, you would get a much better reponse (most of the time) if you posted in the right forum.

JavaScript truly is just for client-side use. And it really has nothing (directly) to do with C# programming or with server-side code, in general.

If you don't yet understand the difference between client and server, that's okay. But now is the time to learn the difference, before you go off on a long journey down the wrong path. I remember a person who wrote an incredibly long and complex set of ASP (pre-ASP.NET) pages that freely mixed JavaScript in the browser and server-side coding. And he managed to make it all work on his own personal machine. But when he went to deploy it to the 'net, of course it fell flat on its face. Because he didn't understand that ONLY on his local machine were the browser and the server the same machine, with the same resources. He had to throw away weeks and weeks of work and start all over.

So if I seem over-emphatic, sorry. But I'm really just trying to save you time and effort. Save you hours if you are lucky, days if you are not.

Anyway, from my viewpoint your question is utterly unrelated to the old thread. How you get information from server to browser is, indeed, completely different from how you get information from browser to server. The server can easily put anything to the browser any way it wants to. Dirt simple. The browser can *ONLY* influence the server by sending data back to the server by means of a query string or post data. (With ASP.NET--and excepting for Ajax--99% of the time post data is used, but that's mainly because of the standard controls in the MS "toolkit".)

So... If I irritated you, it wasn't on purpose. But if I irritated you into thinking about how client/server really works, then it was worthwhile, anyway.