Featured post

c# - Usage of Server Side Controls in MVC Frame work -

i using asp.net 4.0 , mvc 2.0 web application. project requiremrnt have use server side control in application not possibl in noraml case. ideally want use adrotator control , datalist control. i saw few samples , references in codepleax mvc controllib howwver found less useful. can tell how utilize theese controls in asp.net application along mvc. note: please provide functionalities related adrotator , datalist controls not equivalent functionalities thanks in advace. mvc pages not use normal .net solution makes use of normal .net components impossible. a normal .net page use event driven solution call different methods service side mvc use actions , view completly different way handle things. also, mvc not use viewstate normal .net controlls require. found article discussing mixing of normal .net , mvc.

sql - foreign keys without on delete cascade -


i have 2 tables:

challenge:  challengeid integer primary key ... 

and

userchallenge:  id integer  primary key challengeid integer not null ... foreign key(challengeid) references challenge(challengeid) 

if have 1 row on challenge table, challengeid = 1, , 1 row on userchallenge table challengeid = 1.

what happen userchallenge table if delete row challenge? may use on delete cascade userchallenge.challengeid?

thanks.

you test...

if delete row challenge, constraint on challengeid in userchallenge gets violated. have delete referencing records in table well, or update these records using (correct) value or use null. use on delete cascade when want delete referencing records.


Comments

Popular posts from this blog

c# - Usage of Server Side Controls in MVC Frame work -

cocoa - Nesting arrays into NSDictionary object (Objective-C) -

ios - Very simple iPhone App crashes on UILabel settext -