Need support for client side validation of float and double types

[ajaybhargavb]

After this change #2812, float and double uses type="text" which disables the browser specific validation of number fields.
We need to add support for client side validation. One way of doing that would be to add pattern attribute that contains a regex based on the current culture.

cc' @dougbu @NTaylorMullen

[rubenprins]

MVC 5 has a ClientDataTypeModelValidatorProvider exactly for this purpose, which emits a data-val-number validation attribute for all basic numeric types (like decimal, float, byte, uint, etc.), and data-val-date for DateTime (exempting DataType.Time). I can't find an analogue in MVC 6.

Although it's probably easier to customize a jQuery Validate rule like number or date (which many of us have had to do already for MVC 3-5), a culture-sensitive (generated) validator could work right out of the box, which is something that's really missing right now.

[ctolkien]

a culture-sensitive (generated) validator could work right out of the box, which is something that's really missing right now.

I agree with this. On a somewhat related topic, client side validating of dates is a pain if you're not on mm-dd-yy format.