How to exclude HTML tags for Kendo Editor length validation?

[Vinod]

Hello,

I am using a Kendo Grid popup which displays a Kendo editor to modify the content of the field. The field is configured on the MVC server side with the annotation to validate length to be 500 characters as follows:

[AllowHtml]
[StringLength(500, ErrorMessageResourceName = "ActionMaxLength", ErrorMessageResourceType = typeof(Resources.Messages))]
public string Action { get; set; }

If the user enters more than 500 characters in the Kendo editor this validation works. However, our users reported that when they added more formatting (tables, bullet lists) the validation pops up even if the visible character count is not 500. I understand from a technical perspective the character count being validated includes the behind-the-scenes html formatting tags, however this is not intuitive to the end user.

My question is, is there any alternative or built in approach to validate just the html-stripped character count of the Kendo editor validation?

Regards,
V. Joseph

[Alex Gyoshev]

Hello Vinod,

In order to achieve this, you may want to create a custom validation attribute and enable remote validation, like shown in this tutorial. You can strip HTML tags via this regular expression and then validate the length of the result.

Regards,
Alex Gyoshev
Telerik