Just found a bit of code someone here had written to access some DB Entities... public static OurCustomObject GetOurCustomObject(int primaryKey) { return GetOurCustomObject<int>(primaryKey, "usp_GetOurCustomObjectByID"); } public static OurCustomObject GetOurCustomObject(Guid uniqueIdent) { return GetOurCustomObject<Guid>(uniqu...
Suppose I want to write a function like the following (as usual, a trivial example for illustrative purposes): Public Function calcSqSum(Of T)(ByVal list As IEnumerable(Of T)) As T Dim sumSq As T For Each item As T In list sumSq += (item * item) Next Return sumSq End Function As you can probably guess, this f...
The purpose of this is to avoid writing a ton of if() statements. Here is my current code: public override List<oAccountSearchResults> SearchForAccounts(oAccountSearchCriteria searchOptions) { List<oAccountSearchResults> results = Service.SearchForAccounts(searchOptions); results.Sort((a1, a2) => a2.AccountNumber.CompareTo(a1.A...
I want to write a method that uses Reflection to tell whether a given Type implements IList<T>. For example: IsGenericList(typeof(int)) // should return false IsGenericList(typeof(ArrayList)) // should return false IsGenericList(typeof(IList<int>)) // should return true IsGenericList(...
Given the following code: class A<T> { internal void Add(T obj) { } } class C { } class B<T> where T : C { public B() { A<T> a = new A<T>(); a.Add(new C()); } } The call to Add does not compile. It does when I cast it to T first: a.Add((T)new C()); It might be the sleep deprivation, but what am I missing here? ...
Hi, In my settings file, I would like to have one setting that is of the type List(of Myclass).... I can't find anything on the net that does this. Is it possible? ...
Instead of this: var v:Vector.<String> = new Vector.<String>(); is there any way to do something like this? var myType:Class = String; var v:Vector.<myType> = new Vector.<myType>(); Obviously that doesn't work as written, but hopefully you get the idea. ...
I need to create a generic object based on a type that is stored in a database. How can I acheive this? The code below (which won't compile) explains what I mean: string typeString = GetTypeFromDatabase(key); Type objectType = Type.GetType(typeString); //This won't work, but you get the idea! MyObject<objectType> myobject = new MyObjec...
The interface: interface IPlay<T> { } Classes: class Mp3Player : IPlay<int> { } class OggPlayer : IPlay<double> { } class DummyPlayer : IPlay<object> { } Trying to use : 1. IPlay<object> player = new Mp3Player (); 2. IPlay<int> player2 = new OggPlayer (); A Big why 1 and 2. usages can not cast? int to object, or, int to double. It's...
I've got the following classes set up: public abstract class Process<T,S> { ... } public abstract class Resource<T, S extends Process<T, S>> { protected S processer; ... } public class ProcessImpl<EventType1, EventType2> { ... } public class ResourceImpl extends Resource<EventType1, ProcessImpl> { processer = new ...
Hi, I want to create a custom class that basically wraps a dictionary. I want to add a property to it called Name. I tried: public class MyDictionary<int, T> : Dictionary<int, T> { public string Name { get; set;} } Doesn't seem to be working, any ideas? Update THe error I'm getting is: Type parameter declaration must be...
I have a following code which works fine MsgBox(AddSomething(Of String)("Hello", "World")) Public Function AddSomething(Of T)(ByVal FirstValue As T, ByVal SecondValue As T) As String Return FirstValue.ToString + SecondValue.ToString End Function Now we are redesigning the application to work with parameters of different types whi...
I don't understand why the compiler can't resolve the correct overload to use here. (code below) There is only one version of Add() that is appropriate- BigFoo is an IFoo, and does not implement IEnumerable where T is an IFoo. But it insists on reporting an ambiguity. Any ideas? I tried adding a second generic type parameter- Add where T...
I need a generic function that has two type constraints, each inheriting from a different base class. I know how to do this with one type: void foo<T>() where T : BaseClass However, I don't know how to do this with two types: void foo<TOne, TTwo>() where TOne : BaseOne // and TTwo : BaseTwo ??? How do you do this? (using .NET 2) ...
I have scoured the internet for this answer and asked several developers and have come up short. I have a Class called StaffingPositionsDataContract that I am loading mock data (for now) into a List<> and returning to a page. This is working great, but now I need to filter the list based on another list of values that are inputted on t...
Without using extensions methods (LINQ). I am restricted to .NET 2.0 unfortunately. (Yeah, it sucks) Looking for something close to O(log(n)). Thanks for your help. ...
Simple question - given an IList<T> how do you perform a binary search without writing the method yourself and without copying the data to a type with build-in binary search support. My current status is the following. List<T>.BinarySearch() is not a member of IList<T> There is no equivalent of the ArrayList.Adapter() method for List<T...
I'm trying to create an instance of a generic class, without knowing what type to cast it to it until runtime. I've written the following code Type pType = propertyInfo.GetType(); ObjectComparer<pType> oc = new ObjectComparer<pType>(); Hopefully that gives you an idea what I'm trying to do, however it wont compile it ...
Hi, There is a piece of code that I would implement like this in java: public void doIt( T extends MyEventArgs<? extends MyBaseClass> obj ) { ... } How would I do that in c#? I first thought this would be it: public void oIt( T obj ) where T : MyEventArgs<P> where P : MyBaseClass { ... } But apparantly my syntax is wrong. ...
I Just can't seem to wrap my head around them. As I understand it's dynamicly adding logic to a class. Are classes within the framework prepaired for this? Why should I just extend the class and add the funtionality to it in the extention. I would be globally accessable and afaik much easier to maintain. I've Read there are 4 functor ...