C# IDataContext类代码示例

 protected ApplicationApiController(
     IDataContext dataContext,
     Func<int> getUserId)
 {
     this.DataContext = dataContext;
     this.UserId = getUserId();
 }

        public void Execute(IDataContext context, DelegateExecute nextExecute)
        {
            var textControl = context.GetData(DataConstants.TEXT_CONTROL);
            GC.KeepAlive(textControl);

            DateTime lastInvocation, utcNow = DateTime.UtcNow;
            lock (syncLock)
            {
                lastInvocation = this.lastLocateInvocation;
                this.lastLocateInvocation = utcNow;
            }

            const int doubleKeyPressDelay = 500;
            if (utcNow.Subtract(lastInvocation).TotalMilliseconds < doubleKeyPressDelay)
            {
                var locateFileAction = actionManager.TryGetAction(LocateFileAction.Id) as IExecutableAction;
                if (locateFileAction != null)
                {
                    locateFileAction.Execute(context);
                    return;
                }
            }

            if (lastUnderlyingActionUpdate)
            {
                nextExecute();
            }
        }

        /// <summary>
        ///     Sets errors for binding target.
        /// </summary>
        /// <param name="target">The binding target object.</param>
        /// <param name="errors">The collection of errors</param>
        /// <param name="context">The specified context, if any.</param>
        protected override sealed void SetErrors(object target, IList<object> errors, IDataContext context)
        {
            base.SetErrors(target, errors, context);
            var control = target as Control;
            if (control == null)
                return;
            Control rootControl = PlatformExtensions.GetRootControl(control);
            if (rootControl == null)
                return;
            ErrorProvider errorProvider = GetErrorProviderInternal(rootControl);
            if (errorProvider == null)
                return;

            var oldProvider = ServiceProvider
                .AttachedValueProvider
                .GetValue<ErrorProvider>(target, ErrorProviderName, false);
            if (!ReferenceEquals(oldProvider, errorProvider))
            {
                if (oldProvider != null)
                {
                    oldProvider.SetError(control, null);
                    TryDispose(oldProvider);
                }
                ServiceProvider.AttachedValueProvider.SetValue(control, ErrorProviderName, errorProvider);
                if (errorProvider.Tag == null)
                    errorProvider.Tag = 1;
                else if (errorProvider.Tag is int)
                    errorProvider.Tag = (int)errorProvider.Tag + 1;
            }
            SetErrors(control, errorProvider, errors, context);
        }

        public void Handle(ref string bindingExpression, IDataContext context)
        {
            foreach (var replaceKeyword in ReplaceKeywords)
                bindingExpression = bindingExpression.Replace(replaceKeyword.Key, replaceKeyword.Value);

            if (!bindingExpression.Contains("$\"") && !bindingExpression.Contains("$'"))
                return;
            Dictionary<string, string> dict = null;
            InterpolatedStringTokenizer.SetSource(bindingExpression);
            while (InterpolatedStringTokenizer.Token != TokenType.Eof)
            {
                int start;
                int end;
                var exp = ParseInterpolatedString(InterpolatedStringTokenizer, out start, out end);
                if (exp != null)
                {
                    if (dict == null)
                        dict = new Dictionary<string, string>();
                    dict[bindingExpression.Substring(start, end - start)] = exp;
                }
            }
            if (dict != null)
            {
                foreach (var s in dict)
                {
                    if (s.Value != null)
                        bindingExpression = bindingExpression.Replace(s.Key, s.Value);
                }
            }
        }

        private void Compose(IDataContext value)
        {
            foreach(var child in transform)
            {
                var go = ((Transform)child).gameObject;
                go.SetActive(false);
            }

            _composedDataContext = value;

            if(value != null)
            {
                var name = value.GetType().Name;

                foreach(var child in transform)
                {
                    var go = ((Transform)child).gameObject;

                    if (go.name != name)
                        continue;

                    go.SetActive(true);
                    break;
                }
            }

            BroadcastDataContextChange(_composedDataContext);
        }

 public UnitOfWork(IDataContext dataContext, IUnitOfWorkManager manager)
 {
     State = UnitOfWorkState.Active;
     DataContext = dataContext;
     Manager = manager;
     Manager.Add(this);
 }

        /// <summary>
        /// Updates the property value.
        /// </summary>
        /// <param name="dataContext">
        /// The data context.
        /// </param>
        /// <param name="target">
        /// The target.
        /// </param>
        public void Update(IDataContext dataContext, object target)
        {
            if (target == null)
                throw new ArgumentNullException("target");

            Property.SetValue(target, ValueCalculator.GetValue(dataContext));
        }

        public override bool IsAvailable(IDataContext context)
        {
            IList<ITypeMember> typeMembers;
            ITypeElement ownerType;
            var moveStaticMembersIsAvailable = IsAvailable(context, out typeMembers, out ownerType);
            if (!moveStaticMembersIsAvailable) return false;
            Methods = new List<IMethod>();

            foreach (var typeMember in typeMembers) {
                var method = typeMember != null ? typeMember as IMethod : null;
                if (method == null) return false;

                // Do a quick check to see if Extension Methods are allowed.
                var methodDeclaration = method.GetDeclarations().FirstOrDefault();
                if (methodDeclaration != null) {
                    var treeNode = methodDeclaration.CreateTreeElementPointer().GetTreeNode();
                    if (treeNode != null && !treeNode.IsVB9Supported()) return false;
                }

                if (!method.IsStatic || method.Parameters.None() || method.Parameters.First().Kind != ParameterKind.VALUE) return false;
                if (method.IsExtensionMethod ^ Direction == WorkflowDirection.ExtensionToShared) return false;

                Methods.Add(method);
            }

            return true;
        }

        private static ITypeElement GetOriginTypeElement(IDataContext dataContext, DeclaredElementTypeUsageInfo initialTarget)
        {
            var data = dataContext.GetData(DataConstants.REFERENCES);
            if (data == null) {
                return null;
            }

            foreach (var current in data.OfType<IQualifiableReference>()) {
                if (!Equals(current.Resolve().DeclaredElement, initialTarget)) {
                    continue;
                }

                var qualifierWithTypeElement = current.GetQualifier() as IQualifierWithTypeElement;

                if (qualifierWithTypeElement == null) {
                    continue;
                }

                var qualifierTypeElement = qualifierWithTypeElement.GetQualifierTypeElement();
                if (qualifierTypeElement != null) {
                    return qualifierTypeElement;
                }
            }
            return null;
        }

 public static EngineCodeMappingViewModel GetModel(IDataContext context)
 {
     return new EngineCodeMappingViewModel()
     {
         Configuration = context.ConfigurationSettings
     };
 }

 // Hides the menu item if it's not a Unity project
 public override bool IsAvailable(IDataContext dataContext)
 {
     var project = dataContext.GetData(ProjectModelDataConstants.PROJECT);
     if (project == null || !project.IsUnityProject())
         return false;
     return base.IsAvailable(dataContext);
 }

 private static async Task<MarketMappingViewModel> GetFullAndPartialViewModelForMarketMapping
 (
     IDataContext context,
     MarketMappingFilter filter
 )
 {
     var baseModel = SharedModelBase.GetBaseModel(context);
     var model = new MarketMappingViewModel()
     {
         PageIndex = filter.PageIndex.HasValue ? filter.PageIndex.Value : 1,
         PageSize = filter.PageSize.HasValue ? filter.PageSize.Value : Int32.MaxValue,
         Configuration = context.ConfigurationSettings,
         CurrentUser = baseModel.CurrentUser,
         CurrentVersion = baseModel.CurrentVersion
     };
     var marketMapping = await context.Market.GetFdpMarketMapping(filter);
     var programmeFilter = new ProgrammeFilter()
     {
         ProgrammeId = marketMapping.ProgrammeId,
         Gateway = marketMapping.Gateway,
         Code = model.MarketMapping.Programme.VehicleName // In order to filter the gateways specific to the programme
     };
     HydrateModelWithCommonProperties(model, context, programmeFilter);
     model.Gateways = context.Vehicle.ListGateways(programmeFilter);
     
     if (!(marketMapping is EmptyFdpMarketMapping))
     {
         marketMapping.Programme = model.Programmes.FirstOrDefault(p => p.Id == marketMapping.ProgrammeId.GetValueOrDefault());
     }
     model.MarketMapping = marketMapping;
    
     return model;
 }

 protected override string GenerateContent(IDataContext context, string outputFolder)
 {
     var bound = context.GetComponent<ISettingsStore>().BindToContextTransient(ContextRange.ApplicationWide);
       foreach (TemplateApplicability applicability in Enum.GetValues(typeof(TemplateApplicability)))
     CreateXml(applicability, bound, outputFolder, GeneralHelpers.GetCurrentVersion(), context);
       return "Code templates";
 }

        private static string GetSessionId(IDataContext context)
        {
            UnitTestSession session = GetUnitTestSession(context);
            if (session == null)
                return null;

#if ! RESHARPER_50_OR_NEWER || RESHARPER_60_OR_NEWER
            return session.ID;
#else
            // HACK: Get the last RunId for correlation instead of the SessionId because the SessionId is
            // not available to the task runner in R# 5.0 but the RunId is, so we use that for correlation.
            // Unfortunately runs are transient so they are deleted after tests finish.  However before that
            // happens, the Update method will be called many times to update UI state so we should be able
            // to catch the run in flight and save it for later.
            //
            // I have asked JetBrains to provide SessionId info to TaskRunners in a future release
            // as it was done in R# 3.1. -- Jeff.
            foreach (IUnitTestRun run in session.Runs)
            {
                string runId = run.ID;
                LastRunIdCache[session.ID] = runId;
                return runId;
            }

            string lastRunId;
            LastRunIdCache.TryGetValue(session.ID, out lastRunId);
            return lastRunId;
#endif
        }

        public bool IsAvailable(IDataContext dataContext)
        {
            // todo make this resolvable also via the AllTypes... line
            var invokedNode = dataContext.GetSelectedTreeNode<IExpression>();

            return cachedRegistrations.Any(r => r.Registration.RegistrationElement.Children().Contains(invokedNode));
        }