C# IEnumerable类代码示例

        public string Build(BundleType type, IEnumerable<string> files)
        {
            if (files == null || !files.Any())
                return string.Empty;

            string bundleVirtualPath = this.GetBundleVirtualPath(type, files);
            var bundleFor = BundleTable.Bundles.GetBundleFor(bundleVirtualPath);
            if (bundleFor == null)
            {
                lock (s_lock)
                {
                    bundleFor = BundleTable.Bundles.GetBundleFor(bundleVirtualPath);
                    if (bundleFor == null)
                    {
                        var nullOrderer = new NullOrderer();

                        Bundle bundle = (type == BundleType.Script) ?
                            new CustomScriptBundle(bundleVirtualPath) as Bundle :
                            new SmartStyleBundle(bundleVirtualPath) as Bundle;
                        bundle.Orderer = nullOrderer;

                        bundle.Include(files.ToArray());

                        BundleTable.Bundles.Add(bundle);
                    }
                }
            }

            if (type == BundleType.Script)
                return Scripts.Render(bundleVirtualPath).ToString();

            return Styles.Render(bundleVirtualPath).ToString();
        }

 public bool Applies(ShoppingCartQuantityProduct quantityProduct, IEnumerable<ShoppingCartQuantityProduct> cartProducts) {
     if (DiscountPart == null) return false;
     var now = _clock.UtcNow;
     if (DiscountPart.StartDate != null && DiscountPart.StartDate > now) return false;
     if (DiscountPart.EndDate != null && DiscountPart.EndDate < now) return false;
     if (DiscountPart.StartQuantity != null &&
         DiscountPart.StartQuantity > quantityProduct.Quantity)
         return false;
     if (DiscountPart.EndQuantity != null &&
         DiscountPart.EndQuantity < quantityProduct.Quantity)
         return false;
     if (!string.IsNullOrWhiteSpace(DiscountPart.Pattern)) {
         string path;
         if (DiscountPart.DisplayUrlResolver != null) {
             path = DiscountPart.DisplayUrlResolver(quantityProduct.Product);
         }
         else {
             var urlHelper = new UrlHelper(_wca.GetContext().HttpContext.Request.RequestContext);
             path = urlHelper.ItemDisplayUrl(quantityProduct.Product);
         }
         if (!path.StartsWith(DiscountPart.Pattern, StringComparison.OrdinalIgnoreCase))
             return false;
     }
     if (DiscountPart.Roles.Any()) {
         var user = _wca.GetContext().CurrentUser;
         if (user.Has<UserRolesPart>()) {
             var roles = user.As<UserRolesPart>().Roles;
             if (!roles.Any(r => DiscountPart.Roles.Contains(r))) return false;
         }
     }
     return true;
 }

        public Dictionary<string, string> Generate(List<NameNode> idNameNodes, IEnumerable<string> excludedNames)
        {
            Generator.Reset();

            int varCount = idNameNodes.Count;
            string[] newNames = new string[varCount];
            var newSubstitution = new Dictionary<string, string>();

            for (int i = 0; i < varCount; i++)
            {
                string newName;
                do
                {
                    newName = Generator.Next();
                }
                while (excludedNames.Contains(newName) || NamesGenerator.CSharpKeywords.Contains(newName));
                newNames[i] = newName;
            }

            int ind = 0;
            foreach (NameNode v in idNameNodes)
                if (!newSubstitution.ContainsKey(v.Name))
                    newSubstitution.Add(v.Name, newNames[ind++]);

            return newSubstitution;
        }

 /// <summary>
 /// Executes this operation
 /// </summary>
 /// <param name="rows">The rows.</param>
 /// <returns></returns>
 public override IEnumerable<Row> Execute(IEnumerable<Row> rows)
 {
     using (IDbConnection connection = Use.Connection(ConnectionStringName))
     using (IDbTransaction transaction = connection.BeginTransaction())
     {
         foreach (Row row in new SingleRowEventRaisingEnumerator(this, rows))
         {
             using (IDbCommand cmd = connection.CreateCommand())
             {
                 currentCommand = cmd;
                 currentCommand.Transaction = transaction;
                 PrepareCommand(currentCommand, row);
                 currentCommand.ExecuteNonQuery();
             }
         }
         if (PipelineExecuter.HasErrors)
         {
             Warn("Rolling back transaction in {0}", Name);
             transaction.Rollback();
             Warn("Rolled back transaction in {0}", Name);
         }
         else
         {
             Debug("Committing {0}", Name);
             transaction.Commit();
             Debug("Committed {0}", Name);
         }
     }
     yield break;
 }

        public IEnumerable<HtmlTag> BuildScriptTags(IEnumerable<string> scripts)
        {
            Func<string, string> toFullUrl = url => _request.ToFullUrl(url);

            while (_queuedScripts.Any())
            {
                var asset = _queuedScripts.Dequeue();
                if (_writtenScripts.Contains(asset)) continue;

                _writtenScripts.Add(asset);

                yield return new ScriptTag(toFullUrl, asset);
            }

            foreach (var x in scripts)
            {
                var asset = _finder.FindAsset(x);

                if (asset == null)
                {
                    yield return new ScriptTag(toFullUrl, null, x);
                }
                else if (!_writtenScripts.Contains(asset))
                {
                    _writtenScripts.Add(asset);
                    yield return new ScriptTag(toFullUrl, asset, x);
                }
            }
        }

 public SetUnmodifiedCommand(string sitePath, IEnumerable<DocumentFile> documents, IEnumerable<StaticFile> files, IEnumerable<LastRunDocument> lastRunState)
 {
     this.Documents = documents;
     this.Files = files;
     this.LastRunState = lastRunState;
     this.SitePath = sitePath;
 }

 public static void AddRoleClaims(IEnumerable<string> roles, IList<Claim> claims)
 {
     foreach (string role in roles)
     {
         claims.Add(new Claim(RoleClaimType, role, ClaimsIssuer));
     }
 }

        internal async Task RemoveAllRenameAnnotationsAsync(IEnumerable<DocumentId> documentWithRenameAnnotations, AnnotationTable<RenameAnnotation> annotationSet, CancellationToken cancellationToken)
        {
            foreach (var documentId in documentWithRenameAnnotations)
            {
                if (_renamedSpansTracker.IsDocumentChanged(documentId))
                {
                    var document = _newSolution.GetDocument(documentId);
                    var root = await document.GetSyntaxRootAsync(cancellationToken).ConfigureAwait(false);

                    // For the computeReplacementToken and computeReplacementNode functions, use 
                    // the "updated" node to maintain any annotation removals from descendants.
                    var newRoot = root.ReplaceSyntax(
                        nodes: annotationSet.GetAnnotatedNodes(root),
                        computeReplacementNode: (original, updated) => annotationSet.WithoutAnnotations(updated, annotationSet.GetAnnotations(updated).ToArray()),
                        tokens: annotationSet.GetAnnotatedTokens(root),
                        computeReplacementToken: (original, updated) => annotationSet.WithoutAnnotations(updated, annotationSet.GetAnnotations(updated).ToArray()),
                        trivia: SpecializedCollections.EmptyEnumerable<SyntaxTrivia>(),
                        computeReplacementTrivia: null);

                    _intermediateSolutionContainingOnlyModifiedDocuments = _intermediateSolutionContainingOnlyModifiedDocuments.WithDocumentSyntaxRoot(documentId, newRoot, PreservationMode.PreserveIdentity);
                }
            }

            _newSolution = _intermediateSolutionContainingOnlyModifiedDocuments;
        }

        public Dictionary<string, List<Event>> CreateEvents(string calendarId, IEnumerable<CalendarItem> eventsToCreate)
        {
            var service = _GetCalendarService();
            var eventsToBeCreated = eventsToCreate.Select(eventFromCalendarItem);
            var created = new List<Event>();
            var errored = new List<Event>();

            foreach (var eventToBeCreated in eventsToBeCreated)
            {
                try {
                    Console.WriteLine(string.Format("    -- Creating EVENT [{0}] for dates [{1}]"
                        ,eventToBeCreated.Summary, eventToBeCreated.Start.DateTime.Value));
                    var result = service.Events.Insert(eventToBeCreated, calendarId).Execute();
                    if (result.Id != null && result.Id != "")
                    {
                        created.Add(result);
                    }
                }catch(Exception ex)
                {
                    Console.WriteLine(ex);
                    errored.Add(eventToBeCreated);
                }
            }
            return new Dictionary<string, List<Event>>()
            {
                { "created", created },
                { "errored", errored}
            };
        }

        public Announcement(string description, string type, string operatorName, DateTime? startDate, DateTime? endDate, Coordinate location, IEnumerable<string> modes)
        {
            this.OperatorName = operatorName;
            this.Description = description;
            this.StartDate = startDate;
            this.EndDate = endDate;
            this.Location = location;
            this.Type = type;
            this.Modes.AddRange(modes);
            this.RelativeDateString = TimeConverter.ToRelativeDateString(StartDate, true);

            if (modes != null)
            {
                if (modes.Select(x => x.ToLower()).Contains("bus"))
                    this.ModeImages.Add("/Images/64/W/ModeBus.png");
                if (modes.Select(x => x.ToLower()).Contains("rail"))
                    this.ModeImages.Add("/Images/64/W/ModeRail.png");
                if (modes.Select(x => x.ToLower()).Contains("taxi"))
                    this.ModeImages.Add("/Images/64/W/ModeTaxi.png");
                if (modes.Select(x => x.ToLower()).Contains("boat"))
                    this.ModeImages.Add("/Images/64/W/ModeBoat.png");

                if (!this.ModeImages.Any())
                    this.ModeImages.Add("/Images/64/W/ModeBus.png");
            }
            else
            {
                this.Modes.Add("bus");
                this.ModeImages.Add("/Images/64/W/ModeBus.png");
            }
        }

        static IEnumerable<FileRiskFactor> Calculate(IEnumerable<FileModificationStatistics> statistics)
        {
            var riskFactors = new List<FileRiskFactor>();

            foreach (var statistic in statistics)
            {
                var fileRiskFactor = new FileRiskFactor
                {
                    CreatedAt = DateTime.Now,
                    FileName = statistic.FileName,

                    Statistics = statistic
                };

                var existingDuration = GetDaysDuration(statistic.FirstCommit.ModifiedAt, DateTime.Now);
                var localStatistic = statistic;

                foreach (var duration in statistic.OtherCommits.Select(commit => GetDaysDuration(localStatistic.FirstCommit.ModifiedAt, commit.ModifiedAt)))
                {
                    fileRiskFactor.Score += Score(duration, existingDuration);
                }

                riskFactors.Add(fileRiskFactor);
            }

            return riskFactors;
        }

 public string GenerateTestFixture(IEnumerable<Test> tests, string fileName)
 {
     var generator = new CodeGenerator(TemplateEnum.MbUnitTestFixture, TestText, MethodText, PropertyText, TypeText,
                                       AssertText);
     var code = generator.GenerateTestFixture(tests.ToList(), fileName);
     return code;
 }

 /// <summary>
 /// Add a decorator to the enumerable for additional processing
 /// </summary>
 /// <param name="operation">The operation.</param>
 /// <param name="enumerator">The enumerator.</param>
 protected override IEnumerable<Row> DecorateEnumerableForExecution(IOperation operation, IEnumerable<Row> enumerator)
 {
     foreach (Row row in new EventRaisingEnumerator(operation, enumerator))
     {
         yield return row;
     }
 }

 public PerformanceCounterInfo(string name, PerformanceCounter performanceCounters, string alias, IEnumerable<ITag> tags)
 {
     _name = name;
     _performanceCounters = performanceCounters;
     _alias = alias;
     _tags = (tags ?? new List<ITag>()).ToList();
 }

        public AppUpdateControl(IEnumerable<IAppVersion> appVersions, Action<IAppVersion> updateAction)
        {
            this.NewestVersion = appVersions.First();
            InitializeComponent();

            this.AppIconImage.ImageFailed += (sender, e) => { this.AppIconImage.Source = new BitmapImage(new Uri("/Assets/windows_phone.png", UriKind.RelativeOrAbsolute)); };
            this.AppIconImage.Source = new BitmapImage(new Uri(HockeyClient.Current.AsInternal().ApiBaseVersion2 + "apps/" + NewestVersion.PublicIdentifier + ".png"));

            this.ReleaseNotesBrowser.Opacity = 0;
            this.ReleaseNotesBrowser.Navigated += (sender, e) => { (this.ReleaseNotesBrowser.Resources["fadeIn"] as Storyboard).Begin(); };
            this.ReleaseNotesBrowser.NavigateToString(WebBrowserHelper.WrapContent(NewestVersion.Notes));
            this.ReleaseNotesBrowser.Navigating += (sender, e) =>
            {
                e.Cancel = true;
                WebBrowserTask browserTask = new WebBrowserTask();
                browserTask.Uri = e.Uri;
                browserTask.Show();
            };
            this.InstallAETX.Click += (sender, e) =>
            {
                WebBrowserTask webBrowserTask = new WebBrowserTask();
                webBrowserTask.Uri = new Uri(HockeyClient.Current.AsInternal().ApiBaseVersion2 + "apps/" + NewestVersion.PublicIdentifier + ".aetx", UriKind.Absolute);
                webBrowserTask.Show();
            };
            this.InstallOverApi.Click += (sender, e) => {
                this.Overlay.Visibility = Visibility.Visible;
                updateAction.Invoke(NewestVersion); 
            };
            
        }