beforeupdate

Is there a BeforeUpdate for a C# ComboBox on a Winform

I come from the VBA world, and remember there was a BeforeUpdate call I could make on a combobox. Now I am in C# (and loving it) and I was wondering is there a BeforeUpdate call for a ComboBox on a Winform? I can make an invisible textbox and store the info I need there and after the update, look at that box for what I need, but I was h...

ROR ActiveRecord attribute handling with a callback before_update

This code produces an ActiveRecordError: Callbacks must be a symbol denoting the method to call, a string to be evaluated, a block to be invoked, or an object responding to the callback method." before_update :check_instock, :unless => Proc.new { |inventory| inventory.needed.nil? } def check_instock if needed < amount ...

Mysql BEFORE UPDATE trigger activation time

I have two InnoDB tables: CREATE TABLE master( id INTEGER UNSIGNED NOT NULL auto_increment PRIMARY KEY ); CREATE TABLE details( id INTEGER UNSIGNED NOT NULL auto_increment PRIMARY KEY, master_id INTEGER UNSIGNED NOT NULL, CONSTRAINT `byMasterId` FOREIGN KEY (`master_id`) REFERENCES `master`(`id`) ON UPDATE CASCADE ON DELE...