WebForms 2: how to specify requirement of at least one field

[FataL]

Is there a way in WebForms 2 to specify something like these pretty common cases:

1. At least one field is required
2. Only one field from multiple is required
3. A field is required if other field is checked (non empty)

If there is no way, what would you recommend to do?

For the first case I use:

Code: Select all

<input name="a" required="b,c">
<input name="b" required="a,c">
<inbut name="c" required="a,b">

[zcorpan]

I think you need to use scripting for this. See http://www.whatwg.org/specs/web-forms/c ... roduction0 for how to hook up to the WF2 validation framework with scripting.

HTH