In itemupdating event
How can we prevent a user from changing a certain column for an item in a list event?From the list table, you can see if we hook into the Item Updating event, we can compare the current item’s value (properties. The wording is curious here, so I thought I’d take some time to test each combination of common events such as Add, Update and Delete.
Share Point has a built-in infrastructure that allows certain SP objects to raise events that can be handled by custom code.
Each test involved adding a new item, editing the item and then deleting the item.