LINQ-Abfrageergebnisse und Zeichenfolgenmethoden

Question

Lassen Sie mich zunächst die Codewand entschuldigen.Grundsätzlich habe ich zwei zwei Abfragen für Sharepoint-Listen.Der Code scheint großartig zu funktionieren, wenn ich ein paar Zeilen kommentiere.Hier ist der Code:

Global:

private string mUserName = "";
// Entity classes for the Sharepoint Lists
private SeatingChartContext _dc;
private EntityList<Seating_chartItem> _seatCharts;
private EntityList<UsersItem> _users;
private EntityList<Excluded_usersItem> _exusers;
private EntityList<RoomsItem> _rooms;
private EntityList<LogsItem> _logs;`

Seitenladen:

// Get the Lists from Sharepoint
_dc = new SeatingChartContext(SPContext.Current.Web.Url);
_seatCharts = _dc.GetList<Seating_chartItem>("seating_chart");
_users = _dc.GetList<UsersItem>("users");
_exusers = _dc.GetList<Excluded_usersItem>("excluded_users");
_rooms = _dc.GetList<RoomsItem>("rooms");
_logs = _dc.GetList<LogsItem>("logs");`

Hauptcode:

try
{
    //  - - - - -   L O A D   T H E   * P E O P L E *   - - - - -

    // Create List objects
    List<Seating_chartItem> seatList = (from seat in _seatCharts where seat.Room == 0 where seat.Floor == floor select seat).ToList();
    List<UsersItem> usersList = (from user in _users select user).ToList();
    var xusersList = (from xuser in _exusers select xuser.User_id).ToList();
    usersList = usersList.Where(user => !xusersList.Contains(user.User_id)).ToList();

    // Query and use anonymous object for values
    var results = from seat in seatList
                  join user in usersList on
                  seat.User_id equals user.User_id
                  select new
                             {
                                 sid = seat.Seat_id,
                                 icon = seat.Icon,
                                 topCoord = seat.Top_coord,
                                 leftCoord = seat.Left_coord,
                                 name = user.Name,
                                 phone = user.Phone,
                                 mobile = user.Mobile,
                                 content = seat.Content
                             };

    results = results.Take(5);
    foreach (var r in results)
    {
        ImageButton img = new ImageButton();
        img.ID = "seat-" + r.sid;
        img.ImageUrl = "http://cxsmoss/rooms/" + r.icon;
        img.Style.Add(HtmlTextWriterStyle.Position, "absolute");
        img.Style.Add(HtmlTextWriterStyle.Top, r.topCoord + "px");
        img.Style.Add(HtmlTextWriterStyle.Left, r.leftCoord + "px");
        if (r.name == "")
            img.ToolTip = "no name!";
        else
            img.ToolTip = r.name;
        if (r.phone != "")
        {
            string phn = r.phone;
            if (phn.StartsWith("971")) // Comment this line
            {
                string extension = phn.Substring(phn.Length - 4, 4); //Comment this line
                img.ToolTip += Environment.NewLine + "x" + extension;

            }
            else
                img.ToolTip += Environment.NewLine + "x" + phn;
        }
        if (r.mobile != "")
            img.ToolTip += Environment.NewLine + "mobile:  " + r.mobile;
        img.ToolTip += Environment.NewLine + "room/cubicle: " + r.content.ToLower().Replace("seat ", "");
        img.PostBackUrl = ""; // "Default.aspx?name=" + row["name"].ToString();
        img.OnClientClick = "UpdateEmployeeInfo('" + r.name.ToString() + "', '" + img.ID + "');return false;";
        // For debugging size
        img.ToolTip += Environment.NewLine + "Results size " + results.Count();
        floorPanel.Controls.Add(img);
    }


    //  - - - - -   L O A D   T H E   * R O O M S *   - - - - -

    List<Seating_chartItem> seatListRooms = (from seatRoom in _seatCharts where seatRoom.Room == 1 where seatRoom.Floor == floor select seatRoom).ToList();
    List<RoomsItem> roomsList = (from room in _rooms select room).ToList();

    // Query and use anonymous object for values
    var res = from seatRoom in seatListRooms
              join room in roomsList on
              seatRoom.Seat_id equals room.Room_id
              select new
              {
                  rid = room.Room_id,
                  name = room.Name,
                  icon = seatRoom.Icon,
                  topCoord = seatRoom.Top_coord,
                  leftCoord = seatRoom.Left_coord,
                  phone = room.Phone,
                  content = seatRoom.Content
              };

    foreach (var s in res)
    {
        ImageButton img = new ImageButton();
        img.ID = "room-" + s.rid;
        //img.ID = row["icon"].ToString();
        img.ImageUrl = "http://cxsmoss/rooms/" + s.icon;
        img.Style.Add(HtmlTextWriterStyle.Position, "absolute");
        img.Style.Add(HtmlTextWriterStyle.Top, s.topCoord + "px");
        img.Style.Add(HtmlTextWriterStyle.Left, s.leftCoord + "px");
        img.ToolTip = s.name;
        if (s.phone != "")
            img.ToolTip += Environment.NewLine + "x" + s.phone;
        img.ToolTip += Environment.NewLine + "room " + s.content;
        img.OnClientClick = "UpdateRoomInfo('" + s.name + "', '" + img.ID + "');return false;";
        img.ToolTip += Environment.NewLine + "Res size " + results.Count();
        floorPanel.Controls.Add(img);
    }
}

Wenn ich auskommentiere:

if (phn.StartsWith("971"))

und

string extension = phn.Substring(phn.Length - 4, 4);

alles läuft gut.Wenn ich sie drin lasse, wird nur der erste foreach abgeschlossen.Ich habe versucht, alle Variablen in der zweiten Abfrage umzubenennen, r.phone explizit in string umzuwandeln und ToArray am Ende der Ergebnisabfrage zu platzieren.Nichts davon hat geholfen.

Interessanterweise bekomme ich die Zimmer, wenn ich results = results.Take(5); verwende, um nur ein paar zu durchlaufen.Wenn Sie die Anzahl der Ergebnisse und die Anzahl der Res (die Ergebnisse der zweiten Abfrage) überprüfen, sind beide gleich - 5.

Wie kann ich alles zurücksetzen, damit ich meine Listen erneut abfragen kann?

Answer 1

Ist es möglich, dass phn null ist?

Versuchen Sie, r.phone!="" durch string.IsNullOrEmpty (r.phone) zu ersetzen, und / oder aktivieren Sie Ausnahmen der ersten Chance in Ihrem Debugger.(Debug-> Ausnahmen-> Common Language Runtime Exceptions [check])