Max Char limit Javascript problem

[Richard]

I found Javascript from the search site function which enables me to check the number of characters when I paste.
Unfotunately, it doesn't work!

The javascript is below, and the ClientExecutedCommand function is fired on "OnClientCommandExecuted":

	<script type="text/javascript">
	function CalculateLength(editor, value) {
	var textLength = editor.get_text().length;
	var clipboardLength = value.length;
	textLength += clipboardLength;
	return textLength;
	}
	function ClientExecuteCommand(editor, args) {
	var commandName = args.get_commandName();
	var value = args.get_value();
	if (commandName == "PasteFromWord"
	|| commandName == "PasteFromWordNoFontsNoSizes"
	|| commandName == "PastePlainText"
	|| commandName == "PasteAsHtml"
	|| commandName == "Paste") {
	var textLength = CalculateLength(editor, value);
	if (textLength >= 10) {
	alert("Max char. reached");
	args.set_cancel(true);
	}
	}
	}
	</script>

The HTML:

	<telerik:RadEditor ID="RadEditor1" runat="server" OnClientCommandExecuted="ClientExecuteCommand">
	<Content>
	</Content>
	</telerik:RadEditor>

The problem is that line 12 args.get_value() of the Javascript returns null although I have contents in my clipboard and I can see that when I paste in to Notepad there is something there.

Does anyone have any ideas?

Thanks
R

[Rumen]

Hello Richard,

You should attach the ClientExecuteCommand to the OnClientPasteHtml event but not to the OnClientCommandExecuted event and this will fix the problem:

<script type="text/javascript">
function CalculateLength(editor, value) {
    var textLength = editor.get_text().length;
    var clipboardLength = value.length;
    textLength += clipboardLength;
    return textLength;
}


function ClientExecuteCommand(editor, args) {
    var commandName = args.get_commandName();
    var value = args.get_value();
    if (commandName == "PasteFromWord"
    || commandName == "PasteFromWordNoFontsNoSizes"
    || commandName == "PastePlainText"
    || commandName == "PasteAsHtml"
    || commandName == "Paste") {
        var textLength = CalculateLength(editor, value);
        if (textLength >= 10) {
            alert("Max char. reached");
            args.set_cancel(true);
        }
    }
}
</script>
<telerik:RadEditor ID="RadEditor1" runat="server" OnClientPasteHtml="ClientExecuteCommand">
                <Content>
                </Content>
            </telerik:RadEditor>

You can find more information in this forum thread: RadEditor - limit characters entered (issue with right click - paste command).

Best regards,
Rumen
the Telerik team

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[Mathias]

Hi! this code is awesome! BUT... it doesn't subtracts character when is erased.... how i do that?

Thanks!

[Rumen]

Hi Mathias,

You can attach to the onkeydown event and check the content length as shown in this forum thread: RadEditor - limit characters entered (issue with right click - paste command).


Kind regards,
Rumen
the Telerik team