I know that it's possible to implicitly provide asynchronous interaction using: Asynchronous Delegates Asynchronous Callbacks I was just wondering what other methods .Net supports for asynchronous interaction? Help greatly appreciated. Regards EDIT: Maybe I didn't explain myself correctly.... I UNDERSTAND THREADING AND CONCURRENC...
Hello there, I am thinking to create a Custom Control button that would do a CRUD tasks for me. Let me elaborate: I wanted something that save time to writeup code on every UI for CRUD tasks. I am here becuause I want to make sure the approach I am taking should be verified before I am putting hours and taking strain. A Custom (could ...
I want to create a class that initializes a timer which will be used as a central core for other class members to register themselves for the timer elapsed event. My problem is that I don't really know how to expose the timer elapsed event to other classes. One solution, that I think might work is that I simply expose the timer as a publ...
Let's say I have an interface IMyInterface<T> that simply describes one function: public interface IMyInterface<T> { T MyFunction(T item); } I could just about replace this with Func<T, T>, but I want the interface for semantic reasons. Can I define an implicit conversion between that interface and Func<T,T> such that I could pas...
Hi all, I'm surfing through the wonderful blog maintained by Scott Stevenson, and I'm trying to understand a fundamental Objective-C concept of assigning delegates the 'assign' property vs 'retain'. Note, the both are the same in a garbage collected environment. I'm mostly concerned with a non-GC based environment (eg: iPhone). Directl...
I'm using a SDK for a usb camera. The SDK specifies that for each frame grabbed, a callback function will be called. The callback function is defined inside the SDK, it gets a data pointer to the image and a structure used to interpret the data. All of that works correctly. To make a useful application out of that, I need to access a f...
The docs for both DynamicInvoke and DynamicInvokeImpl say: Dynamically invokes (late-bound) the method represented by the current delegate. I notice that DynamicInvoke and DynamicInvokeImpl take an array of objects instead of a specific list of arguments (which is the late-bound part I'm guessing). But is that the only differe...
Duplicate of: How to ensure an event is only subscribed to once and Has an event handler already been added? I have a singleton that provides some service and my classes hook into some events on it, sometimes a class is hooking twice to the event and then gets called twice. I'm looking for a classical way to prevent this from happening....
I have what I think is a simple "problem" to which I have found a couple of solutions but I am not sure which way to go andn the best practice in C#. I have a master object (say a singleton) instanciated once during the lifespan of the application. This "MasterClass" creates a bunch of new type of objects, say "SlaveClass" every time Ma...
Hi, Sorry for the poor explaination of the problem Totally rewriting question I have the following method: public TReturn FindCached<TSearch, TReturn>(Func<TSearch, TReturn> searchMethod) where TSearch : ISearchSpecification where TReturn : class { SearchSpecification spec = new GetConcre...
Hello, I want to emit a method that returns a Func<>. Inside this method I have to create a delegate or a lambda expression which exactly serves the return type. Altogether it should look like this: // I have a resolve method that will be called inside my missing method // This is it's signature: object Resolve( params object[] args);...
I have a drop down list that is populated by inspecting a classes methods and including those that match a specific signature. The problem is in taken the selected item from the list and getting the delegate to call that method in the class. The first method works, but I cannot figure out part of the second. For example, public...
I have a button in a grid that I created programmatically. The button edits some data in a table using data in a hidden column of the grid that the button is in. Normally I send a hidden field the row data using javascript onclientclick of the button then make the changes to the database using that hidden field. But there must be a way t...
Delegates, would those apply here? If so, how? Code examples, as I am new to this area. Logic separation is what I am intending to implement and I think my task below would be a perfect candidate. I have read that objects should be fairly independent and not hard wired to one another. ASPX (Page) <uc1:Attachment ID="Attachment1" runat...
Looking at the signatures for the Func and Converter delegates, public delegate TResult Func<T, TResult>(T arg); public delegate TOutput Converter<TInput, TOutput>(TInput input); I'm struggling to see the difference between the two. Surely, if we rename the generic type arguments, they essentially amount to the same thing? Can anyon...
I have the functions in my class with this signatures, public static TResult Execute<TResult>(Func<T, TResult> remoteCall); public static void Execute(Action<T> remoteCall) How can I pass the same delegate in the second method to the first one? Creating method with Delegate argument is not a way, because I am loosing some exception i...
I've noticed that the Delegate class has a Target property, that (presumably) returns the instance the delegate method will execute on. I want to do something like this: void PossiblyExecuteDelegate(Action<int> method) { if (method.Target == null) { // delegate instance target is null // do something } ...
What are useful definitions for the common methods of passing a method or function as data, such as: Delegates Closures Function pointers Invocation by dynamic proxy and First class methods? ...
I'm writing a class for managing my threading. How do I pass my method that needs threading into my helper class? All that I'll be doing is creating a new thread and passing the method I've passed through into a new ThreadStart(). Thanks in advance. ...
I have been using a class to play sounds using AVAudioPlayer. Since I want to release these sounds right after they are played, I added a delegate. That causes a "_NSAutoreleaseNoPool(): Object 0x55e060 of class NSCFString autoreleased with no pool in place - just leaking" error right after the sound completes playing, but before my -a...