How to Create a new Version Programmatically in Sharepoint List

Question

I have a choice field called stage lets assume it has following values used as a dropdown

stage1
stage2
stage3

on change of stage I would like to record TimeStamp and Who updated the item information

How can I do it on my List without creating any other list, I think using Versioning I can add a new version whenever before and after properties are change on that Field.

//ItemUpdating Event 
if(properties.ListItem["Stage"] != properties.AfterProperties["Stage"])
{
   //Create a Version;
}

I cannot find how to create a version here.

Answer 1

if you have versioning enabled, every time you call SPListItem.Update method, SharePoint automatically creates new version.

If you don't want new version to be created, call UpdateOverwriteVersion .

If you don't want to modify Modified By and Modified fields, then call SystemUpdate (see overloaded SystemUpdate , where you pass argument also not to create new version).

Answer 2

I'm not sure I understand the question. If you have versionning enabled, don't you have this info already under version history? Why do you need to develop anything new?