If I have a WCF service which accepts an IEnumerable as a parameter to a function, is the order that I look up the elements guaranteed to be the same as they were added to the collection? (Or at least the same order they were sent across the wire?) If not, is there a way that I can guarantee the order, such as defining it in the service...
I'm reading the book Real-world functional programming by Tomas Petricek and Jon Skeet and I'm having a hard time digesting the section on computation expressions1) (aka monads). Through this book, I learnt that contrary to my previous experiences LINQ query expressions aren't restricted to IEnumerable<T>, but can work on other custom...
I get this error message and I can't figure out why! Error 1 'Exo5Chap12.ShortCollection<T>' does not implement interface member 'System.Collections.IEnumerable.GetEnumerator()'. 'Exo5Chap12.ShortCollection<T>.GetEnumerator()' cannot implement 'System.Collections.IEnumerable.GetEnumerator()' because it does not have the matching ...
I see that Seq has a cast function from IEnumerable to Seq, but how do I get it to work? open System.Text.RegularExpressions;; let v = Regex.Match("abcd", "(ab)");; Seq.cast (v.Captures);; This produces, error FS0030: Value restriction. The value 'it' has been inferred to have generic type val it : seq<'_a> Either define 'it' as ...
I have an application that can dynamically load data into a DataGrid. What's needed is an object of IEnumerable<IDictionary>, and a List<Dictionary<string,object>> is supplied (each Dictionary in the list has exactly the same keys). The data is loaded into the DataGrid and shown, but now I want to retrieve the data the user has clicked ...
I have a number of enums and need to get them as List<string> objects in order to enumerate through them and hence made the GetEnumAsStrings<T>() method. But it seems to me there would be an easier way. Is there not a built-in method to get an enum like this into a List<string>? using System; using System.Collections.Generic; namespa...
If I make my own implementation of IEnumerator interface, then I am able ( inside foreach statement )to add or remove items from a albumsList without generating an exception.But if foreach statement uses IEnumerator supplied by albumsList, then trying to add/delete ( inside the foreach )items from albumsList will result in exception: cl...
Hello everybody This long title already contain all my question so i just want to give example MyClass[] array How this array work with Foreach without implement IEnumerable interface's method ? ...
I have a view that allows the user to make a selection from an IEnumerable. The way I'm doing it now is to give each checkbox the id of the item and work with the form collection at the controller's side. I seem to remember there to be a better way but can't remember how anymore. Are there any better practices? ...
I have the following list IEnumerable<Car> cars The Car object has a model and a year. I want to sort this list by model and then year (within model) what is the best way of doing this ? ...
IDictionary<TKey, TValue> inherits from IEnumerable<KeyValuePair<TKey, TValue>>, but IDictionary for some reason doesn't inherit from IEnumerable<DictionaryEntry>. I wonder why? I hate to write this ugly .OfType<DictionaryEntry>() every time when I need to make a query against an IDictionary. ...
I've got a problem with the following code: public IEnumerable<ISession> GetSessions() { // ... using (ProvaDbEntities DBEntities = new ProvaDbEntities(Utilities.ToEntitiesConnectionString())) { ObjectQuery<session> sessions = DBEntities.session; IEnumerable<session> q1 = from session in sessions ...
I have a custom control Workspace that inherits from Control and within it is a DependencyProperty that I need to contain a user-specified IEnumerable<IFoo> (I have also tried making it an non-generic IEnumerable). Public Shared ReadOnly FoosProperty As DependencyProperty = DependencyProperty.Register("Foos", GetType(IEnumerable(Of IFo...
The error message I receive is: At least one object must implement IComparable The code causing this is below: private static IEnumerable<Result> setOrderBy(IEnumerable<Result> value, string order) { if (order.Equals("ASC")) { //value = value.OrderBy(c => c, new SearchService.ResultComparer<Attribute>()); value...
I'm trying to use the DataSet from Entity Framework for RDLC. The entity is something like this: Department: DepartmentId Name Employee: EmployeeId DepartmentId -> FK to Department Name When I'm iterating the employees, is it possible get the department name? I've tried some things like =Fields!Department.Value.Name.Value or =Field...
I am not sure if CopyMost is the correct term to use here, but it's the term my client used ("CopyMost Data Protocol"). I have a set of data: Increment Value .02 1 .04 1 .06 1 .08 2 .10 2 I need to return which Value occurs the most "CopyMost". In this case, the value is 1. Rig...
I have two classes, GenericList and SpecificList, where SpecificList inherits from GenericList. GenericList implements IEnumerable<GenericItem> and SpecificList implements IEnumerable<SpecificItem>. SpecificItem inherits from GenericItem. I have to implement GetEnumerator in both GenericList and SpecificList since they implement IEnum...
Hi All, I'm getting an error when selecting from a rows.AsEnumerable(). I am using the following code... var rows = ds.Tables[0].AsEnumerable(); trafficData = rows.Select(row => new tdDataDC { CalculationCount = row.Field<Int64>("biCalculationCountSeqID") , Zone =...
Hi All, I'm getting some Xml back from a service. I would like it to be the datasource of a grid view on my aspx page. Here is a sample of the Xml <?xml version="1.0" encoding="utf-16" ?> <ArrayOfTripTollCompleteDC xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"> <TripTollC...
I've written some code to try and describe my concern: static void Main(string[] args) { IEnumerable<decimal> marks = GetClassMarks(); IEnumerable<Person> students = GetStudents(); students.AsParallel().ForAll(p => GenerateClassReport(p, marks)); Console.ReadKey(); } GetClassMarks uses yield return in it from my weir...