hi,

in my insert.aspx.
when i select Type e.g. "external"  (Type is Column in DB)
Domain is required Field when Type="internal" domain is not required.

How can i do it onchanging or onchanged event

Thanks

 Hi Orimaspnet, I'm not sure what you are trying to do? It may be better is you describe what you want to achive.

ok.
- Insert.aspx
- There i have a dynamiccontrol (e.g. Type) which is a dropdownlist UIHint from FieldTemplates
with listitems "internal" and "external"
- an other dynmiccontrol have (e.g. Account)
- on selecting Type= "internal" the Account is not requiered Field
and on selecting "external" the user must specify an Account so the Field is required
- i tried it in the table class with <Required> Attribute - in the event "OnTypeChanging" but i can not access the value of the "Type" which is a dynamiccontrol
Thanks

 Ah! I have a sample wich does somthing like this, Communicating Between FieldTemplates in Dynamic Data... this sample has fields depending upon a checkbox if checked the show if not they hide, should be easy to modify for your use.