Counter of characters Add counters of characters below text area. Or add only one counter (Text or HTML). Scroll down to see how.

Use property OnClientContentChanged

See HTML Editor properties & events for client-side functionality.

Example code

<ed:Editor id="editor" ModeSwitch="false" OnClientContentChanged="myOnClientContentChanged" runat="server" />

For source code see cs_counters.aspx and vb_counters.aspx files in downloaded Suite.

How to add only one Text counter?

Let's do it on cs_counters.aspx example from downloaded Suite.
Make a copy of this file and edit this copy the following way.

Find in this file the following text:

<span style=" ... " >
     HTML:
     <input style=" ... " type="text" readonly id="totalHtml"  value=""/>
     Text:
     <input style=" ... " type="text" readonly id="totalPlain" value=""/>
</span>

Edit this text:"

<span style=" ... " >
     Text:
     <input style=" ... " type="text" readonly id="totalPlain" value=""/>
</span>

Find in this file the following text:

<script type="text/JavaScript">
function onClientContentChanged(status)
{
  document.getElementById("totalHtml") .value = status.current.htmlTextLength;
  document.getElementById("totalPlain").value = status.current.plainTextLength;
}
</script>

Edit this text:"

<script type="text/JavaScript">
function onClientContentChanged(status)
{
  // document.getElementById("totalHtml") .value = status.current.htmlTextLength;
  document.getElementById("totalPlain").value = status.current.plainTextLength;
}
</script>

If you run edited example you will see such left-bottom corner of HTML Editor control:



In a similar manner you can add only one HTML counter.