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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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Calling C# ASMX Web Service

I have an ASMX web service that I need to utilise as part of a piece of work. I am calling this service via an ASPX page to create new entities on a 3rd party system. I have no access to the underlying code to that service, its simply to allow me to…
Paul Lyons
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How to wait until a process finishes in EntityFramework?

I'm working with EntityFramework and Silverlight, and I'm dealing with this situation. When I try to load the data from a EntitySet, I have to get the data from a callback. Now, I need to get the data inmediately, I mean wait until the process…
Darf Zon
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asynchronous task _dlgt.EndInvoke(ar) Object reference not set to an instance of an object

I am working on an application that need to do asynchronous tasks. I use two times the code given at http://msdn.microsoft.com/fr-fr/library/system.web.ui.page.executeregisteredasynctasks.aspx I simply copy and paste it in my…
LedZepelin
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Calling multiple WCF service using IAsyncResult and AsyncCallback

I have one web page MyWebPage.aspx which while loading has to show data from two webservices along with it's own algorithm. 1) WebServiceI.SomeMethod() -> Takes 10 seconds aprx. to respond. 2) WebServiceII.SomeMethod() -> Takes 10 seconds aprx. to…
Rakesh Kumar Khandelwal
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Fetching task status with AsyncResult showing SUCCESS immediately after the task is receieved by the celery worker

I have a code where I am fetching the current status of a celery task by using AsyncResult object. But the problem is the status is SUCCESS immediately after the task is received by the worker even if the task is not yet executed. Why this is…
sarthak dubey
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C# Combining using statement with IAsyncReader

I'm looking to combine an async fill operation with disposable. class G { SqlConnection connection SqlCommand command; IAyncResult Begin(string connectionString) { this.connection = new SqlConnection(connectionString); …
heyNow
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WebException The operation has timed out after 100 seconds C#

I am having an issue in calling specific WS's when the response takes longer than 100 seconds to be generated. Following my code: try { XmlDocument soapEnvelopeXml = CreateSoapEnvelope(request); HttpWebRequest webRequest =…
Roberto
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Can other method behave as AsyncCallback?

I am implementing vivox in unity and I came across a situation in the tutorial where the guy has done something with AsyncCallback delegate that I want to confirm. using UnityEngine; using VivoxUnity; using System; public class VivoxLearn :…
faizan aslam
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How to call async Task within IAsyncResult method

I have an existing method with return type IAsyncResult from older code, how can I call an async Task from within this method? For example: public IAsyncResult BeginXXX() { // I want to call my async Task here, but it cannot compile like this: …
Zigzagoon
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Celery: Corrupted state payload. Possible causes? Decorated __call__() method the cause?

I'm trying to diagnose this but want to throw the question out there in case anyone has seen anything like this. Essentially I'm seeing AsyncResult(task_id), return a result which has a state of None. Eeerie. I'm using an rpc: backend. So I've…
Bernd Wechner
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IAsyncresult - polling without freezing the UI?

I've got a windows svc which is running asynchronously (I've edited the methods and their parameters to make them async), a little like: http://msdn.microsoft.com/en-us/library/ms731177.aspx However, I call the task which I want to run…
GurdeepS
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How to synchronize with the "future" when extracting data from the database

There is an asynchronous construction. I would like to continue processing after reading from the database here. I tried to use the "while" cycle as follows, but it didn't. Endless loop. If there is no "while" loop, it is asynchronous, but it…
Yusuf Koçak
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why IAsyncResult returning this error? System.PlatformNotSupportedException: 'Operation is not supported on this platform.'

I'm trying to write a delegate with IAsyncResult type in unit test. I expect to see 2 different thread ids in output debug but I encounter this error: System.PlatformNotSupportedException: 'Operation is not supported on this platform.' Here is my…
Ali Eshghi
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How can I limit how long a task runs under .Net?

I know there are various ways to limit how long a task runs under .Net and I wondered if there are any others I've missed or modifications/improvements to the methods I've used previously. Where I am unclear on how exactly a methodology functions I…
RobV
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SQL Syntax error when using SQLCommand.EndExecuteNonQuery

I'm trying to run two SQL statements (MSSQL 2005), asynchronously in a background worker. However, when I call the EndExecuteNonQuery method on the first SqlCommand I get a 'SQL syntax error near' error. Here is my code: try { SqlCommand sqlCmd…
nasirjk
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