cast object to ienumerable c#

Enumerable.Cast extension method fails to cast from int to long, why? Convert / Cast IEnumerable to IEnumerable<T> - Stack Overflow I am a newbie to Access (most programming for that matter). http://www.devarticles.com/c/a/C-Sharp/Interface-IEnumerable-and-IEnumerator-in-C-sharp/2/ Map a Complex Object to a List of Objects using AutoMapper Creates a Dictionary from an IEnumerable according to a specified key selector function, a comparer, and an element selector function. Yeah there is circularity problem with your design. I'm using NHibernate 1.2 (CR1), and I'm using a custom list (inherited from Although VMessage may contain the same members as Message, they are different and unrelated types, so you cannot cast from one to the other in C#.. What you need to do is convert each VMessage to a Message.. One way is to use LINQ: var convertMessages = listMessages.Select(x => new Message { IdTicket = x.IdTicket, IdMessage = x.IdMessage, Text = x.Text, }); var TData = new TicketData . Why Does an Array Cast as IEnumerable Ignore Deferred Execution? I chained them four (2outsidex2inside) times just to show that the type information is not lost in subsequent calls. Determines whether two sequences are equal by comparing their elements by using a specified IEqualityComparer. When are complicated trig functions used? Or maybe call .ToList() on the destination type and use that as the destination instead of using a cast? Determines whether a sequence contains a specified element by using the default equality comparer. Only elements that have a matching XName are included in the collection. For example, ArrayList does not implement IEnumerable<T>, but by calling Cast<TResult> (IEnumerable) on the ArrayList object, the standard query operators can then be used to query the . :-). Appends a value to the end of the sequence. If I cast an IQueryable as an IEnumerable then call a Linq extension method, which implementation gets called? Returns a specified number of contiguous elements from the start of a sequence. Enumerates and transforms a sequence, and produces an immutable dictionary of its contents. If you really want an enumerable with that object then you need to create an empty enumerable and add that object to it. I think Distinct() method will return you an IEnumerable<T> type of collection data. Avoid angular points while scaling radius, Using regression where the ultimate goal is classification. More info about Internet Explorer and Microsoft Edge, Covariance and Contravariance in Generics, Microsoft.Extensions.Configuration.Memory.MemoryConfigurationProvider, Microsoft.Extensions.DependencyInjection.IServiceCollection, Microsoft.Extensions.DependencyInjection.ServiceCollection, Microsoft.Extensions.DiagnosticAdapter.Internal.ProxyEnumerable, Microsoft.Extensions.DiagnosticAdapter.Internal.ProxyList, Microsoft.Extensions.FileProviders.Composite.CompositeDirectoryContents, Microsoft.Extensions.FileProviders.IDirectoryContents, Microsoft.Extensions.FileProviders.Internal.PhysicalDirectoryContents, Microsoft.Extensions.FileProviders.NotFoundDirectoryContents, Microsoft.Extensions.Logging.FilterLoggerSettings, Microsoft.Extensions.Logging.Internal.FormattedLogValues, Microsoft.Extensions.Primitives.StringTokenizer, Microsoft.Extensions.Primitives.StringValues, System.Activities.Presentation.ContextItemManager, System.Activities.Presentation.Model.ModelItemCollection, 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System.Data.Objects.ObjectParameterCollection, System.Data.Services.Client.DataServiceQuery, System.Data.Services.Client.DataServiceResponse, System.Data.Services.Client.QueryOperationResponse, System.Diagnostics.ActivityTagsCollection, System.DirectoryServices.AccountManagement.PrincipalCollection, System.DirectoryServices.AccountManagement.PrincipalSearchResult, System.DirectoryServices.AccountManagement.PrincipalValueCollection, System.IdentityModel.Tokens.SecurityKeyIdentifier, System.IO.Enumeration.FileSystemEnumerable, System.IO.Packaging.PackagePartCollection, System.IO.Packaging.PackageRelationshipCollection, System.Net.Http.Headers.HeaderStringValues, System.Net.Http.Headers.HttpHeadersNonValidated, System.Net.Http.Headers.HttpHeaderValueCollection, System.Net.NetworkInformation.GatewayIPAddressInformationCollection, System.Net.NetworkInformation.IPAddressCollection, System.Net.NetworkInformation.IPAddressInformationCollection, System.Net.NetworkInformation.MulticastIPAddressInformationCollection, System.Net.NetworkInformation.UnicastIPAddressInformationCollection, System.Reflection.Metadata.AssemblyFileHandleCollection, System.Reflection.Metadata.AssemblyReferenceHandleCollection, System.Reflection.Metadata.BlobBuilder.Blobs, System.Reflection.Metadata.CustomAttributeHandleCollection, System.Reflection.Metadata.CustomDebugInformationHandleCollection, System.Reflection.Metadata.DeclarativeSecurityAttributeHandleCollection, System.Reflection.Metadata.DocumentHandleCollection, System.Reflection.Metadata.EventDefinitionHandleCollection, System.Reflection.Metadata.ExportedTypeHandleCollection, System.Reflection.Metadata.FieldDefinitionHandleCollection, System.Reflection.Metadata.GenericParameterConstraintHandleCollection, System.Reflection.Metadata.GenericParameterHandleCollection, System.Reflection.Metadata.ImportDefinitionCollection, System.Reflection.Metadata.ImportScopeCollection, 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System.Security.Cryptography.X509Certificates.X509Certificate2Collection, System.Security.Cryptography.X509Certificates.X509ChainElementCollection, System.Security.Cryptography.X509Certificates.X509ExtensionCollection, System.Security.Principal.IdentityReferenceCollection, System.ServiceModel.Channels.MessageHeaders, System.ServiceModel.Channels.MessageProperties, System.ServiceModel.Channels.UnderstoodHeaders, System.ServiceModel.Configuration.CustomBindingElement, System.ServiceModel.Configuration.ServiceModelExtensionCollectionElement, System.ServiceModel.Dispatcher.IMessageFilterTable, System.ServiceModel.Dispatcher.MessageFilterTable, System.ServiceModel.Dispatcher.MessageQueryTable, System.ServiceModel.Dispatcher.XPathMessageFilterTable, System.ServiceModel.ExtensionCollection, System.ServiceModel.IExtensionCollection, System.Text.Json.JsonElement.ArrayEnumerator, System.Text.Json.JsonElement.ObjectEnumerator, System.Text.RegularExpressions.CaptureCollection, System.Text.RegularExpressions.GroupCollection, System.Text.RegularExpressions.MatchCollection, System.Web.ModelBinding.ModelBinderDictionary, System.Web.ModelBinding.ModelStateDictionary, System.Web.Services.Description.BasicProfileViolationCollection, System.Windows.Controls.ColumnDefinitionCollection, System.Windows.Controls.RowDefinitionCollection, System.Windows.Data.XmlNamespaceMappingCollection, System.Windows.Documents.DocumentReferenceCollection, System.Windows.Documents.DocumentStructures.FigureStructure, System.Windows.Documents.DocumentStructures.ListItemStructure, System.Windows.Documents.DocumentStructures.ListStructure, System.Windows.Documents.DocumentStructures.ParagraphStructure, System.Windows.Documents.DocumentStructures.SectionStructure, System.Windows.Documents.DocumentStructures.StoryFragment, System.Windows.Documents.DocumentStructures.StoryFragments, System.Windows.Documents.DocumentStructures.TableCellStructure, System.Windows.Documents.DocumentStructures.TableRowGroupStructure, System.Windows.Documents.DocumentStructures.TableRowStructure, System.Windows.Documents.DocumentStructures.TableStructure, System.Windows.Documents.PageContentCollection, System.Windows.Documents.TableCellCollection, System.Windows.Documents.TableColumnCollection, System.Windows.Documents.TableRowCollection, System.Windows.Documents.TableRowGroupCollection, System.Windows.Documents.TextElementCollection, System.Windows.Forms.NumericUpDownAccelerationCollection, System.Windows.Markup.INameScopeDictionary, System.Windows.Media.Animation.ClockCollection, System.Windows.Media.Animation.TimelineCollection, System.Windows.Media.CharacterMetricsDictionary, System.Windows.Media.Effects.BitmapEffectCollection, System.Windows.Media.FamilyTypefaceCollection, System.Windows.Media.FontFamilyMapCollection, System.Windows.Media.GeneralTransformCollection, System.Windows.Media.GradientStopCollection, System.Windows.Media.Imaging.BitmapMetadata, System.Windows.Media.LanguageSpecificStringDictionary, System.Windows.Media.Media3D.GeneralTransform3DCollection, System.Windows.Media.Media3D.MaterialCollection, System.Windows.Media.Media3D.Model3DCollection, System.Windows.Media.Media3D.Point3DCollection, System.Windows.Media.Media3D.Transform3DCollection, System.Windows.Media.Media3D.Vector3DCollection, System.Windows.Media.Media3D.Visual3DCollection, System.Windows.Media.PathFigureCollection, System.Windows.Media.PathSegmentCollection, System.Windows.Media.TextEffectCollection, System.Workflow.Activities.OperationParameterInfoCollection, System.Workflow.ComponentModel.ActivityCollection, System.Xml.Xsl.Runtime.XmlQueryNodeSequence, System.Xml.Xsl.Runtime.XmlQuerySequence, ToFrozenDictionary(IEnumerable, Func, IEqualityComparer), ToFrozenDictionary(IEnumerable, Func, Func, IEqualityComparer), ToFrozenSet(IEnumerable, IEqualityComparer), ToFrozenSet(IEnumerable, IEqualityComparer, Boolean), ToImmutableArray(IEnumerable), ToImmutableDictionary(IEnumerable, Func), ToImmutableDictionary(IEnumerable, Func, IEqualityComparer), ToImmutableDictionary(IEnumerable, Func, Func), ToImmutableDictionary(IEnumerable, Func, Func, IEqualityComparer), ToImmutableDictionary(IEnumerable, Find centralized, trusted content and collaborate around the technologies you use most. Enumerates a sequence, produces an immutable sorted set of its contents, and uses the specified comparer. #. Returns the only element of a sequence that satisfies a specified condition, or a specified default value if no such element exists; this method throws an exception if more than one element satisfies the condition. Filters the elements of an IEnumerable based on a specified type. As for why your provided sample doesn't work: I still think var can make code more readable in some cases. Thanks to everyone for your thoughts. Yes, that's silly. For the non-generic version of this interface, see System.Collections.IEnumerable. Returns the maximum value in a generic sequence according to a specified key selector function and key comparer. Without dynamic (i.e. However.. Asking for help, clarification, or responding to other answers. class Employee { public string Name; public int Years; public string Department; } Then (in a seperate class) I have the following code fragments (I think i understand all but the last): I believe that the following code fragment works because the array initiliser creates an array of Employee objects which are . 1. Book set in a near-future climate dystopia in which adults have been banished to deserts. Methinks not*, The next Access Europe meeting is on Wed 7 June - Northwind 2.0 Developer Edition Inventory and String functions, Adding up only highest 7 numbers in a table, How to deploy AntDB Community Version on a virtual machine on VMware WorkstationP2, How to deploy AntDB Community Version on a virtual machine on VMware WorkstationP3, The next Access Europe meeting is on Wed 5 July - Interactive Gantt Chart Scheduler in Access, publicabstractclassNewPluralEntity:ICollection,IEnumerable, publicclassWorkplaces:NewPluralEntity, publicArrayListGetNewPluralEntityPropertyUsingReflection(stringp_propertyName). Some information relates to prerelease product that may be substantially modified before its released. c# - Dynamically casting to IEnumerable<T> or T - Stack Overflow Faced with a problem, element.click() event doesn't work in Safari browser. By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use. 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Please change IQuerable<string> to IEnumerable<string> instead. Invokes a transform function on each element of a sequence and returns the maximum Int64 value. Returns the minimum value in a generic sequence. The OP didn't ask if it made sense, just how to do it. Add an AutoMapper profile class to the project. Bypasses elements in a sequence as long as a specified condition is true and then returns the remaining elements. and button that if the user clicks will write . Download AntDB Community Version Func, Func, Func, Continue with Recommended Cookies. Projects each element of a sequence to an IEnumerable, flattens the resulting sequences into one sequence, and invokes a result selector function on each element therein. I come to know that range.Cast() is able to do the job. I have come to the part with public Customers(). private IEnumerable<dynamic> G. Stack Exchange Network . Sci-Fi Science: Ramifications of Photon-to-Axion Conversion. Is speaking the country's language fluently regarded favorably when applying for a Schengen visa? Despite I really do not like this approach, I know it is possible to provide a toolset similar to LINQ-to-Objects that is callable directly on an IEnumerable interface, without forcing a cast to IEnumerable (bad: possible boxing!) Sorts the elements of a sequence in descending order by using a specified comparer. PropertyInfomyProperty=this.GetType().GetProperty(p_propertyName); objectres=myProperty.GetValue(this,null);//thisisthefullyloadedInsuredobjectinthiscase, Ift.GetInterfaces().Contains(IEnumerable)Then, ReturnDirectCast(ReceivedObject,IEnumerable), ElseIft.GetInterfaces().Contains(IList)Then, DimsAsString=TryCast(mystring,string), DimsAsString=DirectCast(MyObj,String). Creates a HashSet from an IEnumerable. TResult>, IEqualityComparer), GroupJoin(IEnumerable, IEnumerable, There are two reasons why this will normally work for most types that are considered "sequences". That's the problem, what's the point of using IEnumerable when the data is just ONE object. And if I go back and decide to change the type of the Customer.Orders down the track (say from ObservableCollection to IList) then I need to change that declaration too - something I wouldn't have to do if I'd used var in the first place. Returns the minimum value in a generic sequence according to a specified key selector function and key comparer. Invokes a transform function on each element of a sequence and returns the maximum nullable Double value. c# - Cast from IEnumerable to IEnumerable - Stack Overflow Enumerates a sequence and produces an immutable list of its contents. Produces the set difference of two sequences by using the default equality comparer to compare values. Invokes a transform function on each element of a sequence and returns the minimum nullable Decimal value. Produces the set union of two sequences according to a specified key selector function. . Sorts the elements of a sequence in descending order. Determines whether a sequence contains a specified element by using a specified IEqualityComparer. What are the advantages and disadvantages of the callee versus caller clearing the stack after a call? To learn more, see our tips on writing great answers. IEnumerable is a generic interface. Enumerable.Empty().AsQueryable(); This method supports the LINQ to Entities infrastructure and is not intended to be used directly from your code, Accessing Results View from variable in code, Generating the Shortest Regex Dynamically from a source List of Strings, Dynamically cast IEnumerable to IQueryable or dynamically call AsQueryable with LINQ Expressions, How to understand the following C# linq code of implementing the algorithm to return all combinations of k elements from n, Passing IEnumerable data from LINQ as parameter to a method, string.Join - "cannot convert from IEnumerable to string[]". If there is not any related data objects the database mapper assigns the related data property Enumerable.Empty<T>. "Unable to cast object of type Hi, Creates a Lookup from an IEnumerable according to specified key selector and element selector functions. Creates a Lookup from an IEnumerable according to a specified key selector function, a comparer and an element selector function. Computes the average of a sequence of nullable Decimal values that are obtained by invoking a transform function on each element of the input sequence. The result type of a casting operation must be known at compile time. Mapping to Enumerable.Empty<T> throws in netcoreapp3.1 #3365 - GitHub The element's index is used in the logic of the predicate function. The keys are compared by using a specified comparer. Returns the last element of a sequence that satisfies a condition or a default value if no such element is found. Cast received object to a List<object> or IEnumerable<object>

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cast object to ienumerable c#

cast object to ienumerable c#