Form: Limit Entry to MaxLength

[Joel]

How do I limit entry to just allow the MaxLength in the field?  Yes, I get an error when I enter 4000 characters in a field... but, why does it accept 4000 characters?  Is there a setting to limit/stop/truncate their entry?

            <TelerikForm Model="@ContextLink" Class="gsi-padding-10">
                <FormItems>
                    @if (IsDebug)
                    {
                        <FormItem Field="@nameof(ContextLink.Id)" LabelText="Id" Enabled="false" />
                    }

                    <FormItem Field="@nameof(ContextLink.Name)" LabelText="@nameof(ContextLink.Name)" Enabled="true" />
                    <FormItem Field="@nameof(ContextLink.Description)" LabelText="@nameof(ContextLink.Description)" Enabled="true" />
                    <FormItem Field="@nameof(ContextLink.RelativeUrl)" LabelText="@nameof(ContextLink.RelativeUrl)" Enabled="true" />
                    <FormItem Field="@nameof(ContextLink.ComponentFqn)" LabelText="@nameof(ContextLink.ComponentFqn)" Enabled="false" />

                </FormItems>
                <FormButtons />
            </TelerikForm>

        [MaxLength(50)]
        [Required]
        public string Name { get; set; }

[Ivan Danchev]

Hello Joel,

You can prevent the user from entering more than 4000 characters in the input by declaring the TextBox within the form and setting its MaxLength parameter to 4000. See this example: https://blazorrepl.telerik.com/GJuinvlk39f9PghW43 

Once the input reaches 4000 characters, further typing or pasting in the input is prevented. 

Regards,
Ivan Danchev
Progress Telerik

[Joel]

Okay, so I expected this to work from the annotations.  Is there a way to bind it to the property's maxlength property attribute instead of hard-coding this on the form?

[Dimo]

Hi Joel,

I deleted the other thread and the irrelevant posts here. MaxLength DataAnnotations validation is supported out-of-the-box, but you must enable Form validation.

Just to clarify, this is not a feature of the Form, but a feature of the DataAnnotationsValidator.

Regards,
Dimo
Progress Telerik