I have a class that contains the following two properties: public int Id { get; private set; } public T[] Values { get; private set; } I have made it IEquatable<T> and overriden the object.Equals like this: public override bool Equals(object obj) { return Equals(obj as SimpleTableRow<T>); } publi...
I want use a Linq IQueryable Toolkit in project on .NET Compact Framework. The Linq capabilities in CF is little bit shapred - i.e.: IQueryable interface is not available. So I've found third party libraries, which implements missing functionality what I need. Now I have problem with missing method "MethodBase.GetCurrentMethod()". There...
I can flatten the results of a child collection within a collection with SelectMany: // a list of Foos, a Foo contains a List of Bars var source = new List<Foo>() { ... }; var q = source.SelectMany(foo => foo.Bar) .Select(bar => bar.barId) .ToList(); this gives me the list of all Bar Ids in the Foo List. When I attempt to g...
Can someone explain this behavior in Generics? I have a generic function in C# protected virtual void LoadFieldDataEditor <T> (ref T control, string strFieldName) where T : Control { //T can be different types of controls inheriting from System.Web.UI.Control if (control is TextBox) { //This line gives an error //((TextBox)...
I have a List<> in my program, filled with my custom class. I want to be able to extract an object from the list by simply specifying an integer, then returning all objects that have an integer property set to that integer. I was thinking of doing it like this: int exampleint = 5; List<MyClass> extract = new List<MyClass>(); for(int i =...
I'm using C# in Visual Studio 2008 with .NET 3.5. I have a generic dictionary that maps types of events to a generic list of subscribers. A subscriber can be subscribed to more than one event. private static Dictionary<EventType, List<ISubscriber>> _subscriptions; To remove a subscriber from the subscription list, I can use either o...
I have a situation where I have a method that takes a couple of overloads. I have a fairly common scenario where if some condition is true, I call one of the overloads, otherwise I call something else. I decided to try to be clever and refactor the common code into a single generic method that would take an object and a condition, and ...
Easiest way to explain what I mean is with a code sample. This doesn't compile, but is there any way to achieve this effect: foreach(Type someType in listOfTypes) { SomeMethod<someType>(); } Would be really convenient if that would work, but it doesn't. Is there another way to achieve the same thing as above, and why doesn't C# ...
This: Timerange longest = Timerange.longest(breaks); if (longest.durationInHours() >= MIN_FREE_HOURS) return true; is OK. But this: if (Timerange.longest(breaks).durationInHours() >= MIN_FREE_HOURS) return true; gives: java.lang.ClassCastException Do you know why?! For simplicity: public static final <T extends Timera...
Is it possible to define a generic type in C# that references itself? E.g. I want to define a Dictionary<> that holds its type as TValue (for a hierarchy). Dictionary<string, Dictionary<string, Dictionary<string, [...]>>> ...
I have an 'optional' parameter on a method that is a KeyValuePair. I wanted an overload that passes null to the core method for this parameter, but in the core method, when I want to check if the KeyValuePair is null, I get the following error: Operator '!=' cannot be applied to operands of type System.Collections.Generic.KeyValuePair<...
I have a generic function and the following class hiearchy: protected virtual void LoadFieldDataEditor <T1, T2> (T1 control, T2 objData, string strFieldName) where T1 : Control where T2 : BaseDataType { //I will need to access field1. //I don't know at compile time if this would be SomeType1 or //SomeType2 but all of them inherit...
Can someone please explain what this means? Enum<T extends Enum<T>> This seems like a circular definition, and I find it highly confusing to say the least. ...
Can I make an NSMutableArray where all the elements are of type SomeClass? ...
I'm not talking about generic classes that declare properties or fields with the type of a generic parameter. I'm talking about generic properties which could be applied to both generic and non-generic classes. I'm not talking about this: public class Base<T> { public T BaseProperty { get; set; } } I'm talking about this: public...
Hi all, Here is the situation for which I am trying to find a suitable design. I need to store profiles of numbers. A profile is just a series of numbers. They can be of either int, float or decimal type. Each profile has a ProfileDescription field based on an ennumeration. Each Profile has a collection of ProfileVersion Object...
I've been trying to write an extension method to mimic List.RemoveAll(Predicate). So far I've got this: public static void RemoveAll<TKey,TValue>(this Dictionary<TKey,TValue> dict, Predicate<KeyValuePair<TKey,TValue>> condition) { Dictionary<TKey,TValue> temp = new Dictionary<TKey,TValue>(); ...
I'd like to create a Dictionary object, with string Keys, holding values which are of a generic type. I imagine that it would look something like this: Dictionary<string, List<T>> d = new Dictionary<string, List<T>>(); And enable me to add the following: d.Add("Numbers", new List<int>()); d.Add("Letters", new List<string>()); I kno...
Hi, I'm restructuring opur code to use generics. We do use (out of necessity, no changes possible here) own code to attach/detach/iterate/calls delegates. Before there were classes X, Y, Z which declared their own: public delegate void Event_x_Delegate(ref ComParam pVal, out bool result); At the moment I'm passing this delegate to the...
So, I've been working on some playing cards in Java. (Not for any practical purpose really, I just enjoy playing cards and they're good practice) Now, right now, I'm making some Card Structures, decks, hands, piles, etc. They're all essentially the same, so I figure that I'd like to use some inheritance. The problem that I've encount...