C# List.Take方法代码示例

        private IEnumerable<UIElement> Get3Elements(List<UIElement> ordered, bool swap)
        {
            if (ordered.Count == 0) return null;

            List<UIElement> result = ordered.Take(3).ToList();
            if (ordered.Count > 0) ordered.RemoveAt(0);
            if (ordered.Count > 0) ordered.RemoveAt(0);
            if (ordered.Count > 0) ordered.RemoveAt(0);
            while (result.Count < 3) result.Add(null);

            if (swap) result.Reverse();
            return result;
        }

        public NewGameContext(GameTableContext gameTableContext, IEnumerable<Player> players)
        {
            if (players == null)
                throw new ArgumentNullException("players");
            if (gameTableContext == null)
                throw new ArgumentNullException("gameTableContext");

            GameTableContext = gameTableContext;
            WinnerScore = 9;
            TableSize = 7;
            Open();
            Players = new List<ChoosablePlayer>(players.Select(player => new ChoosablePlayer(player)));
            foreach (var player in Players.Take(2)) {
                player.IsChoosen = true;
            }
        }

        public List<MatchModel> GetMatchModels(List<MatchedFileSystemItem> folderMatches)
        {
            if (ListUtility.IsNullOrEmpty(folderMatches))
            {
                return new List<MatchModel> {new MatchModel(this, Resources.NoMatchesFound)};
            }

            folderMatches.Sort(Compare);
            List<MatchModel> matchRepresentations = folderMatches
                .Take(Constants.MaxMatchesToDisplay)
                .Select(GetMatchModel)
                .ToList();

            if (folderMatches.Count > Constants.MaxMatchesToDisplay)
            {
                matchRepresentations.Add(new MatchModel(this, Resources.TooManyMatchesText));
            }

            return matchRepresentations;
        }

        /// <summary>
        /// Initializes the test case execution times tool tip.
        /// </summary>
        /// <param name="testCaseRunResults">The test case run results.</param>
        /// <returns>test case tooltip</returns>
        private string InitializeTestCaseExecutionTimesToolTip(List<TestCaseRunResult> testCaseRunResults)
        {
            StringBuilder sb = new StringBuilder();
            int count = 1;
            testCaseRunResults.Reverse();
            var lastTenRunResults = testCaseRunResults.Take(10);
            foreach (TestCaseRunResult testCaseRunResult in lastTenRunResults)
            {
                sb.AppendLine(string.Format("{0}. StartDate {1} | EndDate- {2} | Duration- {3} | RunBy- {4}",
                    count++,
                    testCaseRunResult.StartDate.ToShortDateString(),
                    testCaseRunResult.EndDate.ToShortDateString(),
                    testCaseRunResult.Duration.ToString(TimeSpanFormats.HourFormat),
                    testCaseRunResult.RunBy));
            }

            return sb.ToString();
        }

 public void srv_GameRecord_GetReportDetailCompleted(object sender, GetReportDetailCompletedEventArgs e)
 {
     gridLoading.Visibility = Visibility.Collapsed;
     currentPos = 0;
     obReportDetail = e.Result.ToList();
     //obReportDetail.Add(DPageSum);
     //obReportDetail.Add(DTotalSum);
     if (e.Result.Count != 0)
     {
         DTotalSum = new ReportDetail();
         DTotalSum.RecordID = "总合计";
         DTotalSum.IsWin = -1;
         DTotalSum.Direction = -1;
         DTotalSum.ResultStatus = -1;
         DTotalSum.BetMoney = obReportDetail.Sum(p => p.BetMoney);
         DTotalSum.WinMoney = obReportDetail.Sum(p => p.WinMoney);
         if (e.Result.Count < 18)
         {
             obReportDetail = e.Result.ToList();
             DPageSum = new ReportDetail();
             DPageSum.RecordID = "本页合计";
             DPageSum.IsWin = -1;
             DPageSum.Direction = -1;
             DPageSum.ResultStatus = -1;
             DPageSum.BetMoney = obReportDetail.Take(18).Sum(p => p.BetMoney);
             DPageSum.WinMoney = obReportDetail.Take(18).Sum(p => p.WinMoney);
             obReportDetail.Add(DPageSum);
             obReportDetail.Add(DTotalSum);
             currentPos = 0;
             PagedCollectionView pageView = new PagedCollectionView(obReportDetail);
             pageView.PageSize = 20;
             dpRecord.PageSize = 20;
             dpRecord.Source = pageView;
             dgRecord.ItemsSource = pageView;
         }
         else
         {
             int page = int.Parse(Math.Ceiling(double.Parse(e.Result.Count.ToString()) / 18).ToString());
             for (int i = 0; i < page; i++)
             {
                 int stayNum = obReportDetail.Count - (i * 20);
                 if (stayNum > 18)
                 {
                     DPageSum = new ReportDetail();
                     DPageSum.RecordID = "本页合计";
                     DPageSum.IsWin = -1;
                     DPageSum.Direction = -1;
                     DPageSum.ResultStatus = -1;
                     //DPageSum.BetMoney = obReportDetail.Skip(i * 20).Take(18).Sum(p => p.BetMoney);
                     //DPageSum.WinMoney = obReportDetail.Skip(i * 20).Take(18).Sum(p => p.WinMoney);
                     DPageSum.BetMoney = obReportDetail.GetRange(i * 20, 18).Sum(p => p.BetMoney);
                     DPageSum.WinMoney = obReportDetail.GetRange(i * 20, 18).Sum(p => p.WinMoney);
                     obReportDetail.Insert(i * 20 + 18, DPageSum);
                     obReportDetail.Insert(i * 20 + 19, DTotalSum);
                 }
                 else
                 {
                     DPageSum = new ReportDetail();
                     DPageSum.RecordID = "本页合计";
                     DPageSum.IsWin = -1;
                     DPageSum.Direction = -1;
                     DPageSum.ResultStatus = -1;
                     //DPageSum.BetMoney = obReportDetail.Skip(i * 20).Take(stayNum).Sum(p => p.BetMoney);
                     //DPageSum.WinMoney = obReportDetail.Skip(i * 20).Take(stayNum).Sum(p => p.WinMoney);
                     DPageSum.BetMoney = obReportDetail.GetRange(i * 20, stayNum).Sum(p => p.BetMoney);
                     DPageSum.WinMoney = obReportDetail.GetRange(i * 20, stayNum).Sum(p => p.WinMoney);
                     obReportDetail.Insert(i * 20 + stayNum, DPageSum);
                     obReportDetail.Insert(i * 20 + stayNum + 1, DTotalSum);
                 }
             }
             currentPos = 0;
             PagedCollectionView pageView = new PagedCollectionView(obReportDetail);
             pageView.PageSize = 20;
             dpRecord.PageSize = 20;
             dpRecord.Source = pageView;
             dgRecord.ItemsSource = pageView;
         }
     }
     else
     {
         PagedCollectionView pageView = new PagedCollectionView(obReportDetail);
         pageView.PageSize = 20;
         dpRecord.PageSize = 20;
         dpRecord.Source = pageView;
         dgRecord.ItemsSource = pageView;
     }
     BindStatReportList(user.ID);
 }

        void ListUserRoleAuthCompleted(List<UserRoleAuth> userRoleAuthList)
        {
            uiUserRoleAuthList.Items.Clear();
            //userRoleAuthList = (from u in userRoleAuthList
            //                    join role in _aspRoles on u.RoleId equals role.RoleId
            //                    select u).ToList();
            userRoleAuthList = userRoleAuthList.Take(_nbrItemsShowed).ToList();

            foreach (UserRoleAuth dataItem in userRoleAuthList)
            {
                OneUserRoleAuth control = new OneUserRoleAuth();
                control.UserRoleAuthData = dataItem;
                control.AspRoles = _aspRoles;
                control.AspUsers = _aspUsers;
                control.SiteGroups = _siteGroup;
                control.IsUserView = true;
                control.RebindCombobox();
                control.DeleteButtonClicked += new EventHandler(control_DeleteButtonClicked);
                uiUserRoleAuthList.Items.Add(control);
            }

            _roleComponentItemSource.Clear();
            var roleList = (from i in userRoleAuthList
                            select i.RoleId).Distinct();
            _roleCount = roleList.Count();
            foreach (Guid roleId in roleList)
            {
                DataServiceHelper.ListRoleComponentPermissionAsync(roleId, null, ListRoleComponentCompleted);
            }

            Globals.IsBusy = false;
        }

 private void RemoveExtraBarcodes(ref List<string> barcodes)
 {
     int i = barcodes.Count -1;
     for(; i>0; i--)
     {
         if (barcodes[i] !="$$$")
             break;
     }
     if(i != barcodes.Count -1) //some tube missing
     {
         barcodes = barcodes.Take(i + 1).ToList();
     }
 }

        /// <summary>
        /// 過去のもの。頑張りすぎた。
        /// </summary>
        /// <returns></returns>
        ClusteringResult Run2()
        {
            List<ClusteringResult> tmpResult = new List<ClusteringResult>();
            OnReport("開始");
            for (int i = 0; i < wideCount; i++)
            {
                ClusteringResult cr = new ClusteringResult() { Parent = this };
                cr.CreateRandom(ClusterTable, random.Next());
                tmpResult.Add(cr);
            }

            int loopCount = 0;
            int sameCount = 0;
            double sameRate = 0;
            while (true)
            {

                loopCount++;
                if (tmpResult.First().GetLockRate() == sameRate)
                {
                    sameCount++;
                }
                else
                {
                    sameRate = tmpResult.First().GetLockRate();
                    sameCount = 0;
                }

                OnReport(loopCount + "回目開始");
                foreach (var item in tmpResult)
                {
                    item.Run();
                }
                OnReport("計算終了");

                var baseResult = tmpResult.OrderByDescending(n => n.GetPerformanceIndex()).First();
                foreach (var item in tmpResult)
                {
                    item.CategorySort(baseResult);
                }
                tmpResult = tmpResult.OrderByDescending(n => n.GetPerformanceIndex()).ToList();
                List<ClusteringResult> list = new List<ClusteringResult>();
                foreach (var item in tmpResult.Take(tmpResult.Count / 2))
                {
                    var clone = item.Clone();
                    list.Add(clone);
                }
                if (tmpResult.Count > 3)
                {
                    foreach (var item in tmpResult.Skip(tmpResult.Count / 2).ToArray())
                    {
                        tmpResult.Remove(item);
                    }
                    foreach (var item in list)
                    {
                        tmpResult.Add(item.Clone());
                    }
                }

                if (tmpResult.First().GetLockRate() < 0.9 && loopCount < 100 && sameCount < 10)
                {
                    int c = 0;
                    OnReport("マージ・ランダム振り開始");
                    foreach (var item in tmpResult)
                    {
                        var count = item.CreateMargeData(list, true);
                        //  lock (this)
                        {
                            c += count;
                        }
                    }
                    OnReport("レポート開始");
                    OnReport(tmpResult.First().View());

                    if (c == 0) break;
                }
                else
                {
                    foreach (var item in tmpResult)
                    {
                        var count = item.CreateMargeData(list, false);
                    }
                    tmpResult.First().Run();
                    break;
                }

                if (tmpResult.First().DivideCategory())
                {
                    OnReport("クラスタ分割発生");
                    var r = tmpResult.First();
                    tmpResult.Clear();
                    for (int i = 0; i < TryCount; i++)
                    {
                        tmpResult.Add(r.Clone());
                    }
                }
//.........这里部分代码省略.........

        private void SurfaceMode(HandCollection data)
        {
            this.Dispatcher.Invoke(new Action(() =>
            {
                if (isNew)
                {
                    if (this.selectedVideo != null)
                    {
                        this.selectedVideo.IsSelected = false;
                    }
                    this.selectedVideo = new VideoSurface(this.videoPaths[this.videoPointer++]);
                    this.videos.Add(this.selectedVideo);
                    this.selectedVideo.RequestRemove += new EventHandler(videoSurface_RequestRemove);
                    if (videoPointer >= this.videoPaths.Length)
                    {
                        videoPointer = 0;
                    }

                    this.viewPort.Children.Add(selectedVideo.ModelVisual3D);
                    this.selectedVideo.Play();
                    this.selectedVideo.Opacity = 0.8;
                    isNew = false;
                }
                if (selectedVideo.IsPaused)
                {
                    selectedVideo.Play();
                }

                var points = new List<CCT.NUI.Core.Point>();

                var hand1 = data.Hands[0];
                var hand2 = data.Hands[1];

                points.Add(hand1.FingerPoints[0].Fingertip);
                points.Add(hand1.FingerPoints[1].Fingertip);
                points.Add(hand2.FingerPoints[0].Fingertip);
                points.Add(hand2.FingerPoints[1].Fingertip);

                points = points.OrderBy((p) => p.X).ToList();
                var leftPoints = points.Take(2).ToList();
                var rightPoints = points.Skip(2).Take(2).ToList();
                leftPoints = leftPoints.OrderByDescending(p => p.Y).ToList();
                rightPoints = rightPoints.OrderByDescending(p => p.Y).ToList();

                this.selectedVideo.SetPoints(Map(leftPoints[0]), Map(rightPoints[0]), Map(rightPoints[1]), Map(leftPoints[1]));
            }));
            moveMode = false;
        }