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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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WCF Async deadlock?

Has anyone run into a situation where a WaitAny call returns a valid handle index, but the Proxy.End call blocks? Or has any recommendations or how best to debug this - tried tracing, performance counters (to check the max percentages), logging…
JK.
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HttpWebRequest wait for second async response

So I need to get two responses from a request. The documentation from de webservice I need to call states that I will recieve a quick synchonous response and after that it will send me a slow second async response. To me this seems very weird and I…
Predders
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IAsyncResult and unobserved exceptions

Before we had async/await and Task-oriented programming, there were async operations exposed on various I/O wrappers (that are still available) using the BeginOperation/EndOperation pattern with IAsyncResult. I'm having difficulty finding…
Jonathan Gilbert
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C# IAsyncResult WaitAll

In some of the implementations of WaitAll I have seen the following code IAsyncResult result1 = Method.BeginInvoke(10, MyCallback, null) IAsyncResult result2 = Method.BeginInvoke(20, MyCallback, null) WaitHandle[] waitHandles = new WaitHandle[] {…
user489686
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Label.Text = Struct.Value (Microsoft.VisualStudio.Debugger.Runtime.CrossThreadMessagingException)

I have an app that I'm working on that polls usage from an ISP (Download quota). I've tried threading this via 'new Thread(ThreaProc)' but that didn't work, now trying an IAsyncResult based approach which does the same thing... I've got no idea on…
Kyle
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EndInvoke's arguments

I have a delegate foo, I call BeginInvoke on it and retrieve the IAsyncResult into a var bar. I then call EndInvoke(bar) and everything is happy. Why do I have to pass bar to endinvoke? what exactly is going on that demands this? I realize Endinvoke…
Snark
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WCF service aync pattern feedback on failed transmission

I am working in Silverlight 4 and implementing a Polling Duplex service with an asynchronous pattern used to update the clients. // interface for messages back to client [OperationContract(IsOneWay = true, AsyncPattern=true)] …
Mike
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APM and the unresolved System.AccessViolationException mystery on breakpoints

Consider the following function: static void Main(string[] args) { FileStream fs = new FileStream("e:\\temp.txt", FileMode.Open); int size = (int)fs.Length; byte[] data = new byte[size]; IAsyncResult result = fs.BeginRead(data, 0,…
Joe Bank
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Cleanly handling AsyncTimeout on ASP.NET Async Page

According to this article The Begin Event Handler is Always Invoked The second impliciation of AsyncTimeout that I had not really internalized until recently is that the begin event handler for a registered async task is always invoked,…
ss2k
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IAsyncOperation^

Im trying to create a C++ Runtime compoment to use in c# windows store app project; I Created a new project C++ -> Windows Store App -> Windows Runtime Component. The new project has default class1. This is what i m trying to do and i get…
Stamos
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Passing a method with parameter Func and getting TResult

So basically T has a return type, I want to get back the generic return type. Example: private TResult EndInvoke(Func asyncCaller, IAsyncResult asyncResult) { TResult result = default(TResult); try { …
MilkTea027
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C# void ReceiveData(IAsyncResult iar)

i would like some help with the following. this is to do with Asynchronous sockets. from the sender: string stringData = "Welcome to my server server server"; byte[] message1 =…
iTEgg
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Converting Asynchronous Programming Model (Begin/End methods) into event-based asynchronous model?

Let's say I have code that uses the Asynchronous Programming Model, i.e. it provides the following methods as a group which can be used synchronously or asynchronously: public MethodResult Operation(); public IAsyncResult…
David Boike
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CRM 2011 - Silverlight App that execute synchronous plug-in

Hi Im new at Silverlight/async programming Situation: Silverlight app as a webresource that make CRUD operations Problem: The entity have a plugin step registered to it as Synchronous. Then in silverlight when the code execute the…
yahikochan1
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WCF Async call that return void and is OneWay

I use WCF to async communicate between 2 processes. till now I implemented the IAsyncResult pattern, and did it by having 3 methods: BeginOperation - client.BeginOperation, when service receive it queue the job on threadpool with delegate for…
ilansch
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