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Questions tagged [iasyncresult]

Questions аbout IAsyncResult .net interface that represents the status of an asynchronous operation.

Questions аbout IAsyncResult .net interface that represents the status of an asynchronous operation.

The IAsyncResult interface is implemented by classes containing methods that can operate asynchronously. It is the return type of methods that initiate an asynchronous operation, such as FileStream.BeginRead, and it is passed to methods that conclude an asynchronous operation, such as FileStream.EndRead. IAsyncResult objects are also passed to methods invoked by AsyncCallback delegates when an asynchronous operation completes.

An object that supports the IAsyncResult interface stores state information for an asynchronous operation and provides a synchronization object to allow threads to be signaled when the operation completes.

http://msdn.microsoft.com/en-us/library/system.iasyncresult.aspx

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Put several HTTP request to wait for the same I/O completion port

My application load asynchronously a big amount of information from a web service and "Application_Start". If an user request wants to use that information, and it is nor ready, the thread will be block with a Monitor.Wait. When the information is…
vtortola
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Asynchronous function making asynchronous calls

I have a library that uses the BeginXxx EndXxx asynchronous pattern (obviously, the following code is simplified): ILibrary { IAsyncResult BeginAction(string name, AsyncCallback callback, object state); int EndAction(IAsyncResult…
Luk
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Brain Teaser: IAsyncResult AsyncState is null after callback in Async ASP .Net Page

I could really do with some help on this one - I am completely stuck :-( I have implemented the Async pattern (correctly, hopefully) in a search component that I have developed. This is being called from an Async Asp. Net page, using…
RobD
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Callbacks not firing in C# script inside a Unity plugin

I have a C# script that I'm attempting to put into a Unity plugin. The script essentially is just creating a socket connection, ingesting data, and parsing it. It works perfectly when just used as a "standalone" script in Unity. This is the code…
narner
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Exception, but only on 3rd time - The IAsyncResult object was not returned from the corresponding asynchronous method on this class

I have a legacy (2008) Windows service application (using System.ServiceProcess.ServiceBase) that I need to utilize in a slightly different way to how it's working now. At the moment it starts up and creates a TCPLISTENER on a specific port, for a…
Iomm1
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Simulating push technology by rebuilding the AsynchResult Object - is it even possible?

Recently, I successfully created a long-polling service using HttpAsyncHandler’s. During the development it came to me (that) I “might” be able to re-use the AsyncResult object many times without long-polling repeatedly. If possible, I could then…
Prisoner ZERO
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How to break IAsyncResult?

I want to break Verification(IAsyncResult r) when status == NBiometricStatus.Ok but it my this code is not breaking my loop, so please kindly help me ... private void OnCapturingCompleted(IAsyncResult r) { var enrollTask = new…
P. Katariya
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Can I use a single instance of a delegate to start multiple Asynchronous Requests?

Just wondered if someone could clarify the use of BeginInvoke on an instance of some delegate when you want to make multiple asynchronous calls since the MSDN documentation doesn't really cover/mention this at all. What I want to do is something…
RobV
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IAsyncResult's WaitHandle and blocking?

Let's say I have this code : public class MyAsyncHandler : IHttpAsyncHandler { public IAsyncResult BeginProcessRequest(HttpContext context, AsyncCallback cb, Object extraData) { MyAsynchOperation asynch = new…
Royi Namir
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What are pros and cons of consuming web services with 1. events / 2. IAsyncResult?

I made a WPF example that consumes a web service (www.webservicex.com/globalweather.asmx) in two different ways: with events like this: public Window1() { InitializeComponent(); DataContext = this; Location = "loading..."; …
Edward Tanguay
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VB.NET 3.5 SocketException on deployment but not on development machine

I have written an async UDP client to talk to a server at my company. When I run on my developer machine all is well. When I deploy to another machine I get a socket exception on EndReceive the first time I send data over the socket. My dev box…
jercra
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IAsyncResult does not complete and locks UI

I am making a REST call, the server side response is in the form of an XML. I am making this call asynchronously. I've test it as a Console application and it works as it should. However, when I test it on the XBOX , the asynchronous request is…
Fabii
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ASP.Net Async Page with Action.BeginInvoke

I'm trying to write an async page in asp .net which runs a function in a different thread. The problem in the following code, is that when I debug it, the function EndAsyncOperation is never called. As a result, the page isn't fully loaded and loads…
Alex
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Implementing IAsyncResult Begin/End Without Delegate.BeginInvoke()

I have a class which receives data though a socket and marshals the data to an object. Synchronously, it would look like this: class SocketTest { private const int HEADER_LEN = 10; Socket socket; byte[] buffer; public Data…
stevep
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IsCompletedSynchronously for the RegisterasyncTask

I am using RegisterAsyncTask to do some IO bound operation in aspx page. I have 2 question regarding the same. 1) What happens if I perform the IO operation in OnBeginEvent and the BeginfXXX retrun synchronosuly (IAsyncResult.CompletedSynchronouslt…
Kunal
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