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How to have "max length" in radeditor?
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Tgaud
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Tgaud asked on 23 Jun 2009, 09:00 AM
Hi, i dont find the "max length" property in radeditor, where is it??

i have a varchar(3000) in my database to save the content.
But i dont know how to limit the content in the properties??

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Rumen
Telerik team
answered on 25 Jun 2009, 02:21 PM
Hello Tgaud,

Here is an example demonstrating how to restrict the text length in RadEditor:

<script type="text/javascript"
var maxTextLength = 30; 
var messageText = 'You are not able to type more than ' + maxTextLength + ' symbols!'
 
 function isAlphaNumericKey(keyCode) 
 { 
      if ((keyCode > 47 && keyCode < 58) || (keyCode > 64 && keyCode < 91)) 
      { 
          return true
      } 
      return false
 } 
 
 function LimitCharacters(editor) 
 { 
     editor.attachEventHandler ("keydown"function (e) 
     { 
         e = (e == null)? window.event : e; 
         if (isAlphaNumericKey(e.keyCode)) 
         { 
             textLength = editor.get_text().length; 
             if (textLength >= maxTextLength) 
             { 
                  alert(messageText); 
                  e.returnValue = false
                  return false
             } 
         } 
      }); 
 } 
 
 function CalculateLength(editor, value) 
 { 
     var textLength = editor.get_text().length; 
     var clipboardLength = value.length; 
     textLength += clipboardLength; 
     return textLength; 
 } 
 
 function OnClientPasteHtml(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 >= maxTextLength) 
            { 
              alert(messageText); 
              args.set_cancel(true); 
 
            } 
        }  
 } 
</script> 
<telerik:RadEditor id="RadEditor1" OnClientLoad="LimitCharacters" OnClientPasteHtml="OnClientPasteHtml" 
    Runat="server"
    <Content> 
</Content> 
</telerik:RadEditor>  


Best regards,
Rumen
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Jeremy Coenen
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answered on 25 Jun 2009, 03:31 PM
There appears to be flaws in this code as it does not count a number of characters that I think should be checked.  For example all of the number pad numbers (0-9) are ignored, as well as period,comma, and a host of other relevant characters.  Below is my modified version of isAlphaNumericKey

 function isAlphaNumericKey(keyCode) { 
      if ( 
          (keyCode > 47 && keyCode < 58) || 
          (keyCode > 64 && keyCode < 91) || 
          (keyCode > 93 && keyCode < 112) || 
          (keyCode > 185 && keyCode < 193) || 
          (keyCode > 218 && keyCode < 223) 
         )  
          { 
            return true
          } 
      return false
    } 

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rick
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answered on 11 Feb 2014, 05:58 PM
Hi

Is there no other way to limit text/html insertion without coding?
It seems wrong to have a Text / HTML char limit without being able to enforce it.

Is it possible to add a functionality/property, something like CanExceedMaxLength="false"?

Thank you
0
Ianko
Telerik team
answered on 13 Feb 2014, 06:30 AM
Hi Rick,

The above discussion is dated since 2009 year and could be quite outdated.

The RadEditor control has the MaxHtmlLength and MaxTextLength properties that could be helpful to restrict the content length. You can examine this help article for more information about them.

If you have further difficulties, please open a formal ticket to us with details about the encountered problems.

Regards,
Ianko
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rick
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answered on 13 Feb 2014, 09:31 AM
Hi,

Yes, i know of the MaxHtmlLength and MaxTextLength properties, but they do not impede the user from exceeding that limit.
My question is if there is no alternative to the alert displayed when the limit is exceed, or implementing custom code myself.

Thank you
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Ianko
Telerik team
answered on 13 Feb 2014, 09:40 AM
Hello Rick,

I am sorry for not understanding the origin of required information.

Unfortunately, the RadEditor control does not provide a built-in functionality for text length limitation. Such approach should be entirely custom implementation, which is built accordingly to the application requirements.

Although examining the Client-side API of the editor would help you to achieve the desired functionality.

Regards,
Ianko
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Tgaud
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Answers by
Rumen
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Jeremy Coenen
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rick
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Ianko
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