Hi Graham,

You'll need to create a new one for this, it should be pretty simply, add 2 props to the custom fieldtype  (like rangestart, rangestop) and then override the validate method where you check if the submitted value is between that range

Should be something like 

 [Attributes.Setting("RangeStart", description ="Enter the range start value", control ="Umbraco.Forms.Core.FieldSetting.TextField")]

        public string RangeStart { get; set; }

        [Attributes.Setting("RangeStop", description ="Enter the range stop value", control ="Umbraco.Forms.Core.FieldSetting.TextField")]

        public string RangeStop { get; set; }

        public override List<Exception> Validate(HttpContextBase httpContext)

        {

            var value = httpContext.Request[this.AssociatedField.Id.ToString()];

            //check range here and return a list of expections

        }

Full validate method could look like 

publicoverrideList<Exception> Validate(HttpContextBase httpContext)

        {

            var value = httpContext.Request[this.AssociatedField.Id.ToString()];

            //check range here and return a list of expections

            if (string.IsNullOrEmpty(value))

                return null;

            var val = 0;

            var startRange = 0;

            var stopRange = 0;

            if (int.TryParse(value, out val)

                && int.TryParse(RangeStart, out startRange)

                && int.TryParse(RangeStop, out stopRange))

            {

                if (val > stopRange || val < startRange)

                    return  new List<Exception> {new Exception("Not in range")};

            }

           return null;

        }

Thanks for the in-depth information Tim, I shall give it a go :)

Great, let me know if that does the trick :)

Hi Tim,

I have just remembered that I have client side validation enabled for the forms, and the solution obviously only validates server side when the Next button has been clicked on the page. What would be involved to add client side validation to a custom field type, do you have any examples?

Thanks.

Since we use jquery validate you should be able to just use that, so if jquery validates unobtrisive supports it out of the box you'll just need to add the attributes to your input on your view

If it doesn't supports it out of the box you can write an extender for jquery validate

Think you'll need to add data-val-range="The field Age must be between 1 and 130."data-val-range-max="130"data-val-range-min="1"

Thanks Tim, sounds interesting, I haven't delved into jquery validator before so I will have a read up on it and have a go with what you posted above

You can fetch the additional settings in the fieldtype view with Model.AdditionalSettings["key"]

Thanks Tim, worked a treat

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