Operations related to SharePoint's Column type Person or Group

In this post I discussed how we can fetch records from SPListItem's column type Person or Group and stored information back into that column.

Here in following method first I am creating the SPUser by using EnsureUser method of SPSite and then adding that SPUser in SPListItem of SPList. Then I am fetching that SPUser from the SPListItem.

(In Folloing method codes with comments are self-explainatory)

    /// <summary>
    /// Working with with column of type [Person OR Group]
    /// </summary>
    void user()
    {
        //SPListItem spListItem;

        string loginName = "DOMAIN\\USERNAME";
        //Assign SPUser in your custom column and 
        //also its Login name (string) in seperate column 
        //(for ease in development operation)
        spListItem["User"] = oWebsite.EnsureUser(loginName);
        spListItem["UserLoginName"] = loginName;


        //Fetch SPUser values from SPColumn
        SPFieldUserValueCollection values 
              = (SPFieldUserValueCollection)spListItem["User"];
        loginName = values[0].User.LoginName;
    }

Note : From UI control point of view, we can use SharePoint's PeoplePicker control to enter and validate SPUser.