Get SPUser Information for the Document Creator

While working on creating a SharePoint 2007 event handler I needed to get the login name for the creator of the document I was trying to update. This is the code I snagged from a blog article which worked.

SPSite oSite = new SPSite("Your site URL");
SPList oList = oSite.OpenWeb().Lists["Your list name"];
SPListItem oItem = oList.GetItemById("Item ID");
string userValue = oItem["Created By"].ToString();
int index = userValue.Index Of(';');
int id = Int32.Parse(userValue.Substring(0, index));
SPUser itemCreator = oSite.OpenWeb().SiteUsers.GetByID(id);

After using that information I could then call:

itemCreator.LoginName.ToString()

Which produces the users login name in the following format "DOMAIN\User".

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