Get SPUser Object from SPListItem

Sometimes, you need to get SPUser object(to retrieve email, name,...) , however you have only SPListItem with SPFieldCollection. When you try to retrieve it, for example:

var field = item["user"]

you just get  a string with User ID , like : "123;#"

We need to cast this object to SPFieldUserValue.

This C# code can help us:

public SPUser GetSPUserObject(SPListItem spListItem, String fieldName)
    {
        SPUser spUser = null;
        try
        {
            if (fieldName != string.Empty)
            {
                SPFieldUser field = spListItem.Fields[fieldName] as SPFieldUser;
                if (field != null && spListItem[fieldName] != null)
                {
                    SPFieldUserValue fieldValue = field.GetFieldValue(spListItem[fieldName].ToString()) as SPFieldUserValue;
                    if (fieldValue != null)
                    {
                        spUser = fieldValue.User;
                    }
                }
            }
        }
        catch (Exception ex)
        {
            throw ex;
        }
        return spUser;
    }