Invalid length for a Base-64 char array or string

Invalid length for a Base-64 char array or string

Posted by: phil on 14 December 2018, 11:44 am EST

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  phil

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  Posted 14 December 2018, 11:44 am EST - Updated 30 September 2022, 9:00 am EST

  Hello,

  Im using the richtextbox for silverlight component. On the odd email I’m getting an error when I set the html property of the component to the contents of the email:

  System.FormatException: Invalid length for a Base-64 char array or string

  Any ideas as to the cause? I’ve attached a longer version of the error so you can see where it’s coming from.

  Thanks,

  Phil.

  

  550×570 12.7 KB

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  Ruchir.Agarwal

  

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  Posted 17 December 2018, 8:50 am EST

  Hello Phil,

  Thank you for attaching the stack trace of the exception.
  
  The probable cause of the exception might be that your mail content is having some “spaces” and “+” which are creating issues.
  
  So,could you please confirm the following:

  1. Whether/not you are using the latest version of ComponentOne at your end.
  2. Check whether the exception comes with every email content/not. If it is related to a specific email only, please share the odd email content for us to check. If you have any issues sharing the contents here, please share the same at https://supportone.componentone.com

  Thanks,
  
  Ruchir

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  phil

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  Posted 17 December 2018, 1:07 pm EST

  Hello,

  thanks for the reply.

  I’ve narrowed down the issue. In trying to create a test email for you, I’ve discovered that it’s to do with images, specifically when there’s a base64 encoded image that’s invalid.

  In fact no base64 encoded images display.

  • Valid ones do not display, which is no problem for us.
  • Invalid ones though cause an error which is a problem.

  I’ll write some code to strip out all base64 encoded images and that’ll solve the problem.

  Finally to answer your question on versions we are a bit out of date, so perhaps you’ve fixed this is a more recent update.

  thanks,

  Phil.

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  Ruchir.Agarwal

  

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  Posted 18 December 2018, 7:36 am EST

  We are glad to know you have found the issue and have successfully resolved it.
  
  Let me know, if you need any help.

  Thanks,