I know this is kind of old, but I've come across a situation where having a "ReadOnly" attribute would be nice.

The problem with using a "Template" is that once you go down that path you lose a lot of the other parts which make the FormItem easy to use. For example, you have to now create your own Label, Hint, and Validation controls to match those of the other FormItems.

It's not super hard, but you go from this:

<FormItem LabelText="Mobile Phone"
                     Field="@(nameof(UserProfileDto.MobileNumber))"
                     Hint="You will received texts at this number." />

To this:

<FormItem LabelText="Email Address"
          Field="@(nameof(UserProfileDto.Email))"
          Hint="This value cannot be changed.">
    <Template>
        <label class="k-form-label">Email Address</label>
        <TelerikTextBox @bind-Value="UserProfile.Email"
                        ReadOnly="true" />
        <div class="k-form-hint">This value cannot be changed.</div>
    </Template>
</FormItem>

Hi Dimo,

Yes, if we enabled="false", the appearance is getting changed. everthing is grayed out including lables and textboxes and text inside the textboxes. 

If we set readonly, the appearance will look same except user cannot enter any data.

I have the same issue, but no idea how to implement this.

Hi Dimo,

The problem is by just setting Enabled="false" users are not able to select the input box to continue copying data out of the field. ReadOnly was made available on all input boxes so we can continue to select and copy data from the field. It is possible to set up a template for each form item but that is a lot of extra work to do to make sure all fields are ReadOnly.

It is actually extremely rare I would ever want to have a disabled input that users cannot select and copy.