We have a small framework written in C# .Net 2.0 that we want to expose to COM. Problem is, we have some generic classes that would be exposed as the following: interface IOurClass { ReadonlyCollection<IOurListObject> OurCollection { get; } } interface IOurListObject { //Some properties that don't matter } What is the be...
I've run into Java code similar to the following: public interface BaseArg { } public class DerivedArg implements BaseArg { } public abstract class Base <A extends BaseArg> { A arg; void doIt() { printArg(arg); } void printArg(A a) { System.out.println("Base: " + a); } } public class Derived extends Base<DerivedArg> { ...
Hello, I have 2 objects Project and License. They both inherit from the object Entity (abstract class). Now I have an extension method "GetNewId" that contains logic to get the next id in a list of entities. I've defined this method as an extension method, but the problem is that List (which is also a list of entities) and List don't ...
I've a method which returns a generic list collection(List) from the database. This collection has got order details i.e., Order Id, order name, product details etc. Also, method the method returns a collection having only the top 5 orders sorted by order date descending. My requirement is that each time the client calls this method, I...
I'm working with two third-party libraries, and racking my brain over a way to solve this particular issue. I'm implementing an interface which will pass me objects of type "object", and in a good number of the calls, I need to pass them into a generic method that expects a type with class and new() constraints defined. I know that any ...
It's there a way to invoke a method and the return type is strong typed ? There is an example of code public static IQueryable<T> FilterVersion<T>(this Table<T> t, IVersionIndexFilter version) where T : class { try { // Define the new type of my table Type versionTableType = Type.GetType(typeof(T)...
I have been trying to determine the type of a field in a class. I've seen all the introspection methods but haven't quite figured out how to do it. This is going to be used to generate xml/json from a java class. I've looked at a number of the questions here but haven't found exactly what I need. Example: class Person { public fina...
Here is some code, it won't compile but essentially want I want to create is a function that parses as CSV file and then converts the values in the CSV list to a specific type. Func<string, Func<string,T>, IEnumerable<T>> parser =(string csv, Func<string, T> newFunc) => { List<T> items = new List<T>(); string[] a...
I have a class called Client, which is a subclass of Configurable. I have an ObservableCollection<Client> which I need to view as an ObservableCollection<Configurable>. This will allow me to databind to the list from some general layout generation code. It must also allow me to clear the list, and to add items to the list. Of course...
Is it possible to use generic methods with WCF or ADO.NET DS? Or is it possible to create a generic WebService Repository with WCF or ADO.NET DS? ...
I'd like to add a generic type method DoSomething<T>, but for backwards compatibility, I want it to simply pass the type parameter for the generic type from an existing method with the same name. public void DoSomething<T>(Data data) { //do something with Data, it depends on the type of T } public void DoSomething(Data data, Type d...
I'd like to do something like this: Private _myCollection As IList(Of T) Public Property MyProperty(Of T)() as IList(Of T) Get Return Me._myCollection End Get Set(ByVal value As String) Me._myCollection = value End Set End Property Basically, I want to have a collection of items that may be of any type...
I need a fast replacement for the System.Collections.Generic.Dictionary<TKey, TValue>. My application should be really fast. So, the replacement should support: Generics Add Get Contains ... and that's it. I don't need any support in LINQ or anything. And it should be fast. A simple code like: Stopwatch stopWatch = Stopwatch.StartN...
In Scala, I'd like to be able to write generic classes which use operators like >, /, * etc, but I don't see how to constrain T such that this will work. I looked into constraining T with Ordered[T], but that doesn't seem to work since only RichXXX (e.g. RichInt) extend it, not Int etc. I also saw Numeric[T], is this only available in ...
Here is an example : public class B<T> {} public class D : B<int> {} public class A<T, S> where T : B<S> {} public class C : A<D, int> {} public class Test1 { public class test1 { A<D, int> t = new C(); } } What I would like do to is in declaring class C, only say : C : A<D>. Why I need to repeat int ? Because int...
I have a few cases I wonder about. First, if you have no constructor: class NoCons { int x; } When I do new NoCons(), the default constructor gets called. What does it do exactly? Does it set x to 0, or does that happen elsewhere? What if I have this situation: class NoCons2 extends NoCons { int y; } What happens when I call new N...
I'm green hand in web-service. I wrote a generic class as a value holder like this: public class SearchResult<T> { private List<T> resultSet; } Then I write a web-service method: public SearchResult<Book> getSearchResult(){ ... } When I was using maven-jaxws-plugin to generate client files, I found that the generic type inf...
Say I have a method that takes an int as a string and returns the int if the parse succeeds or a null value otherwise. int? ParseValue(string intAsString) { int i; if (int.TryParse(intAsString, out i)) return i; return null; } How can this method be re-written so that it works not only w...
Dear sirs and ladies. First, a little introduction. I have to functions: static class C { static void F1(Type type) { // Do something to invoke F2<T> } static void F2<T>() { // bla bla bla } } I wish to invoke F1(Type), which in turn should transition to the generic context pertinent to the given type parameter a...
i want to write procedure which accents name of 2 tables as arguments and then compare the number or rows of the 2. Also i want to each field of the 2 columns.The row which has a missmatch shold be moved to another error table. Can anyone give a PL/SQL procedure for doing this. I want to achive this in oracle 9 ...