Validation Attributes not working on Kendo Editor

[Travis]

Decorating a string field on a view model with [DataType(DataType.MultilineText)] and [Required] and then creating an @Html.Kendo().EditorFor(x => x.Field) does not add the "data-val-required" validation attribute to the Kendo Editor's underlying textarea element. In fact, no DataAnnotation attribute, nor custom validation attributes that implement ValidationAttribute and IClientModelValidator get handled properly for the Kendo Editor. From what I've seen, other controls seem to handle them just fine.

 

Do you have any plans on adding validation support for the Kendo Editor? We've been working around this by manually adding the html attributes to the controls, but this really isn't desirable as it adds a higher maintenance cost to our application.

[Travis]

1.
 public class ViewModel
2.{
3.   [Required]
4.   [DataType(DataType.MultilineText)]
5.   public string TextEditor { get; set; }
6.}

[Travis]

Sorry, I mistyped the previous post.

ViewModel:

public class ViewModel
{
   [Required]
   [DataType(DataType.MultilineText)]
   public string TextEditor { get; set; }
}

 

HtmlHelper:

@(Html.Kendo().EditorFor(x => x.TextEditor))

 

Actual Html Result:

<textarea aria-label="editor" cols="20" id="TextEditor" name="TextEditor" rows="5" style="height: 240px; display: none;" type="textarea" data-role="editor" autocomplete="off" class="k-content k-raw-content k-valid" ></textarea>

 

Expected Html Result:

<textarea aria-label="editor" cols="20" id="TextEditor" name="TextEditor" rows="5" style="height: 240px; display: none;" type="textarea" data-role="editor" autocomplete="off" class="k-content k-raw-content k-valid" data-val-required="TextEditor is required."></textarea>

 

 

[Dimitar]

Hello Travis,

I have investigated the described scenario and I can confirm that the observed behavior is related to a bug in the Editor's HtmlHelper for ASP.NET Core. I have logged this issue with high severity in the official Kendo UI GitHub repository and you can start tracking the progress that we make on it from item #4729.

In general, bug fixes are prioritized based on the issues's severity and priority. Currently, there is no exact time frame on when a fix for the discussed issue will be released. Therefore, I would suggest to subscribe to the above linked issue, so that you get notified as soon as the item status changes.

As a temporary workaround until the issue is resolved with an official fix, the validation attributes could be added manually as already suggested. 

Also, as a token of gratitude for helping us discover this issue with the Editor HtmlHelper, I have also updated your Telerik Points.

Regards,
Dimitar
Progress Telerik