Asynchronous

ASP.NET

Show loader till all ajax asyc calls is not finished

28 Feb 2023 by Ajay_Saini

Hi, Please clarify following problem if any solution is there - In ASP.NET i am calling 4 Web Methods in parallel using $.ajax with async=true. Now lets assume there are 4 functions that i am calling to utilize the benefit of ajax as - BindGridRecords(); BindNotifications(); BindProjectFiles();...

async void – How to Tame the Asynchronous Nightmare

6 Feb 2023 by Dev Leader

Problem with async void and a solution for it

Async

Await

What is the best way to modify WPF's user interface asynchronously without freezing it?

11 Jan 2023 by Reza jafery

I created an algorithm for this specific case. For clearer understanding, I illustrated it as follows: Click to see I only inserted the necessary codes.

WPF

asynchrony

What is the best way to modify WPF's user interface asynchronously without freezing it?

11 Jan 2023 by Reza jafery

Hi, I used the Dispatcher property to modify the UI, and I added System.Threading.Thread.Sleep(3000) in Dispatcher.Invoke block to ensure that it would not freeze, but the UI stays frozen for 3 seconds. Let's say the Dispatcher.Invoke block takes...

WPF

asynchrony

What is the best way to modify WPF's user interface asynchronously without freezing it?

3 Jan 2023 by Pete O'Hanlon

You shouldn't be running your SQL commands in the dispatcher. What Dispatcher.Invoke does is marshall the operation back onto the thread that the Dispatcher is running on, so what you are doing here is actually forcing the "long running"...

WPF

asynchrony

How to execute async await task on writemultiplecoilsasync?

16 Nov 2022 by Graeme_Grant

There is a lot wrong here. 1. The method that you want to await is not marked as async 2. The asynchronous call to PerformWriteRequestAsync in method WriteMultipleCoilsAsync is not awaited. You should have: private async void...

How to execute async await task on writemultiplecoilsasync?

16 Nov 2022 by Paul Dietz

I could use some help getting the WriteMultipleCoilsAsync task to run. I'm getting the error message Cannot assign void to an implicitly-typed variable on the Task.Run statement. I need to capture the response message from...

How to execute async await task on writemultiplecoilsasync?

16 Nov 2022 by Richard Deeming

Graeme (Solution 1) is correct that you should avoid async void[^] wherever possible. Unfortunately, that doesn't address the actual problem. Your two WriteMultipleCoilsAsync methods return Task, not Task. That means there is no result...

Asynchronous Events in C#

11 Sep 2022 by Mark Pelf

Tutorial article on Asynchronous Events invocation in C#

event

Using await in node.js

12 Jun 2022 by canvas_newbi

I have a function that reads files in a directory and pushes their name into an array. But every time I try to print the array, it's empty because the code does not wait for the function to finish, even though I used await that suppose to make...

Using await in node.js

12 Jun 2022 by Richard Deeming

Your readFiles function does not return a Promise. The printFiles function has nothing to await. If you're using Node.js v10 or later, you can use fsPromises.readdir[^] instead: import { readdir } from 'node:fs/promises'; async function...

100 Days of TypeScript (Day 10)

9 Jun 2022 by Pete O'Hanlon

In the previous article, I started describing how I had built a more complex TypeScript web application that retrieves data from a separate API and displays the data in a relatively visually pleasing manner.

How to send httpclinet request asynchronously using completablefuture and using retry logic

22 Apr 2022 by Darylmo

I want to send an httpclient request asynchronously using completablefuture and also use exponential backoff and retry logic to send the message 3 times it if it fails to do it the first time. What I have tried: I haven't been able to make my...

Java

GET Azure Blob with Subtle Crypto Signed Pure JavaScript

7 Feb 2022 by Jim_Gray

Example code showing how to use Subtle Crypto to sign your request to Azure API in pure JavaScript or jQuery

Communicating Asynchronously

21 Jan 2022 by Bernhard Nebel

How does asynchronous serial communication work, what Arduino libraries are there to support it, and what can go wrong?

C# - external ASM code breaks when run asynchronously

10 Dec 2021 by Stukeley

Hello, I have an issue with my C# code that calls an external procedure written in x64 ASM. [DllImport("...", CallingConvention = CallingConvention.StdCall)] public static extern IntPtr ApplyFilterToImageFragmentAsm(IntPtr bitmapBytes, int...

ASM

assembler

C# - external ASM code breaks when run asynchronously

10 Dec 2021 by Richard Deeming

As I suspected, the problem is that your unmanaged code is running outside of the fixed blocks, so the CLR is free to move the memory around. The pointer you pass in will be pointing to the wrong thing. Since you can't await inside a fixed...

ASM

assembler

Cannot get data (temprature) from API

10 Dec 2021 by Member 13622627

I use openweathermap to get some data (temperature) by letting user enter the Zip Code of his country. I expect to return a response that I can extract the temperature from it. Instead I get the following response Response {type: 'cors', url:...

Cannot get data (temprature) from API

10 Dec 2021 by Richard Deeming

Mixing async with the older-style .then continuations seems like a waste. You also need to read the content of the response before you can use it. const getWeatherData = async (baseURL, ZIP, KEY) => { const response = await...

Strive for Short-Lived Synchronous Communication

1 Nov 2021 by Bohdan Stupak

Short tip explaining the importance of asynchronous communication

Asynchronous LRU Cache (CLOCK-2-hand) Implementation In NodeJS

29 Sep 2021 by tugrulGtx

CLOCK caching (LRU approximation) with O(1) cache hit, up to N asynchronous O(1) cache misses

How to stop response before all the code is executed, using async await

15 Sep 2021 by Tharinda Hashen

I have a function named getActiveUsers which helps me to find active users I first want to get data from Reward collection, which will return 100 data to rewards array. After waiting for all the results, I want to go through the retrieved...

How to stop response before all the code is executed, using async await

15 Sep 2021 by Richard Deeming

rewards.map(async (reward) => ...) returns an array of Promise options. You can't directly await an array; you need combine the array into a single Promise using Promise.all, and await that instead: await Promise.all(rewards.map(async (reward)...

Remote Procedure Calls (RPC) with .NET 5: Streaming and Replacement for WCF

14 Aug 2021 by Igor Ladnik

Remote Procedure Call on .NET5

Stop Saving to Disk with C# Asynchronous Streams

2 Jul 2021 by Lee P Richardson

Asynchronous streams, the real world problem they help us solve, and some common pitfalls

performance

GFX Sidebar: Inside the ILI9341 Display Driver on the ESP-IDF

6 May 2021 by honey the codewitch

Explore the inner workings of a highly capable IoT display driver for the ESP32

Thread Synchronization between Worker Threads

16 Apr 2021 by Chris_Green

Get an event fired by Thread A to execute in the context of Thread B

Adapting Event and Callback Based Asynchronicity to the Task Framework

19 Feb 2021 by honey the codewitch

Use TaskCompletionSource to turn an event or callback based model into a Task based one

Mvc async requests to refresh data using jquery

25 Nov 2020 by Member 14797054

Good day, I would like to find out how to refresh data in a MVC program, it must be an asynchronous request and you must also utilize Jquery. TIA What I have tried: Creating a partial view @Html.Partial("_Stats",...

MVC5

Mvc async requests to refresh data using jquery

25 Nov 2020 by Vincent Maverick Durano

Really hard to pinpoint what could be the problem without looking into your full code, but I hope you can get something from this article: ASP.NET MVC 5: Implementing a ShoutBox Feature Using jQuery and AJAX[^]

MVC5

Better solution? - Refreshing API bearer token with multiple asynchronous javascript calls that use that token

16 Sep 2020 by Jeremy D Richardson

Have a problem that I feel like must have been solved in some elegant ways but wanting some input. I'm using vanilla Javascript to solve this but wondering if perhaps there is a more elegant React solution or some other library. Problem: Have an...

Better solution? - Refreshing API bearer token with multiple asynchronous javascript calls that use that token

16 Sep 2020 by Chris Copeland

I'm not particularly au fait when it comes to modern JS and the classes available to it, but if you're concerned about asynchronous web requests refreshing the token at the same time, you'd have to look into something like a Mutex. For the flow...

Example 1 is not callback beacuse I didn't pass function as argument?

24 Aug 2020 by cupidanish

what is the difference between example 1 and example 2: Example 1: function a () { console.log("A is running"); b(); } function b () { console.log("B is running") } a(); Example 2: const fun1 = function a (callback) { ...

ES6

Example 1 is not callback beacuse I didn't pass function as argument?

24 Aug 2020 by Gomehere Blogger

The callback function is important to us, Its works as an argument passing in the function. Its something required asynchronous function called and think, you need to wait for that response and want to process that response ahead that could be...

ES6

Example 1 is not callback beacuse I didn't pass function as argument?

24 Aug 2020 by F-ES Sitecore

The difference is that in the first example "a" can only then go on to call "b" as the call to "b" is hard-coded in "a". In the second example the calling code decides what function "a" calls, so it could be "b", it could be "c", it could even...

ES6

How do I invoice a SOAP service asynchronously using handlers with VB.NET

13 Aug 2020 by Sandeep Mewara

I don't see the call like My.WebServices.XYZService.getXYZAsync() being made or post handler attached. Example is in VB but hopefully will give the directions to go ahead. Try following steps: 1. Reference the XYZ Web service 2. Add an event...

SOAP

How do I invoice a SOAP service asynchronously using handlers with VB.NET

13 Aug 2020 by Member 14878480

Hello, I am trying to invoke a Web Services Asynchronously from a VB.Net desktop application. My code is included. When the button is clicked I call the function KycCustomerCheck(), which grabs the required parameters from my form and invokes...

SOAP

How to Use the C# Await Keyword on Anything

24 Jul 2020 by honey the codewitch

Using await in scenarios where you want to await custom items with or without using Task.Run()

How to Implement and Use Awaitable Sockets in C# using TAP

23 Jul 2020 by honey the codewitch

Explore adapting Socket's async model to a task based one and adding some awaitable socket operations to your projects

Keep thread alive in order to receive callback

20 Apr 2020 by VanuDiplomat

I've used callbacks before, but only when my client code was not responsible for keeping the program/threads running (for instance in an Android app). All I want to do now, is to make a really simple Firestore Java client that listens for...

Java

System.net.sockets.socketexception: "normally, each socket address (protocol, network address, or port) may only be used once"

Code Example for SPA and Micro-Service on Azure

25 Mar 2020 by Quí Nguyễn NT

This is a demonstration of a basic example of single page Angular application and micro-service architecture on Azure.

Custom Dialogs in Xamarin.Forms: Plugin "Rg.Plugins.Popup" Pages Asynchronous

8 Dec 2019 by Abdulrahman Emad

This article proposes a solution for plugging "Rg.Plugins.Popup" asynchronous into your code.

24 Sep 2019 by Member 14589606

When I run the program it says: "System.Net.Sockets.SocketException: "Normally, each socket address (protocol, network address, or port) may only be used once" It shows an error here: socketCmdText = new UdpClient(cmdTextPort); -The socketCmdText is also has a value of null This is my code:...

Can only read one temperature reading from the processor of the sensor, for other sensors it does not work

18 Sep 2019 by Member 14589606

Only one reading can be taken from a sensor at a time. I used the concept of asynchronous sockets, that is, it is only reading the processor temperature of a single sensor at a time. When you add more, it shows that there is an error. Any ideas would be appreciated. After executing the jobs,...

Can only read one temperature reading from the processor of the sensor, for other sensors it does not work

18 Sep 2019 by Patrice T

Quote: Can only read one temperature reading from the processor of the sensor, for other sensors it does not work The usage of try/catch in your code prevent the program from telling you where the problem arise, and this is an important information. A try/catch is used to hide an error that you...

Can only read one temperature reading from the processor of the sensor, for other sensors it does not work

18 Sep 2019 by OriginalGriff

Quote: The object reference was not set to an object instance This is one of the most common problems we get asked, and it's also the one we are least equipped to answer, but you are most equipped to answer yourself. Let me just explain what the error means: You have tried to use a variable,...

How do I test win32 DLL plugin

16 May 2019 by ChimpTrader

A very simple query, your solution would help tremendously. Many thanks in advance. With the help of C++, I am trying to built a Win32 DLL Data Plugin using the instructions as mentioned in the ADK of a software (client), which is going to fetch data from TCP Socket based API and then inject...

How do I test win32 DLL plugin

16 May 2019 by KarstenK

You should ask your client to pay the costs or pay yourself to get over it. The alternative is that you mock the interface of the plugin yourself and so can verify that your code is running fine. tip: create some scenarios with lame and or broken connection to simulate error handling like...

How do I test win32 DLL plugin

16 May 2019 by Gerry Schmitz

Test "what part"? You can "mock" anything. You should be able to abstract the "last part" to 2 or 3 lines until someone decides to "pay up". Connect; send; receive.

Set CurrentPrincipal in an asynchronous login in WPF

10 Apr 2019 by User 10778296

I've been searching the web for this, and couldn't really find a solution that actually worked. Situation is as follows: I've got a WPF application, where I want to present the user with a simple logon form. Trying to work MVVM, so I've got a LoginViewModel with the following code behind the...

Set CurrentPrincipal in an asynchronous login in WPF

10 Apr 2019 by Xequence

If you want the thread to persist across new Windows you can set the thread like so. I saw there was an answer that contained more custom code when the reality is objects already exists string[] = List of Roles {"a", "b", "c"} "name" = the primary key from the database that holds the unique...

Asyncusageanalyzers version 1.0.0-alpha003 was not found.

21 Mar 2019 by Amod Kumar Chandra

I am facing following issue NETSDK1064 Package AsyncUsageAnalyzers, version 1.0.0-alpha003 was not found. It might have been deleted since NuGet restore. Otherwise, NuGet restore might have only partially completed, which might have been due to maximum path length restrictions. Can anyone help...

Asyncusageanalyzers version 1.0.0-alpha003 was not found.

21 Mar 2019 by Richard Deeming

It's a pre-release package, so you'll need the IncludePreRelease flag to install it: Install-Package AsyncUsageAnalyzers -Version 1.0.0-alpha003 -IncludePrerelease Pre-release versions in NuGet packages | Microsoft Docs[^] NB: That package has not been updated in four years, and the GitHub...

Creating Progress Bar When Loading Two or More Async Tasks in Android

17 Dec 2018 by Benktesh Sharma

Tips for tracking progress on multiple async tasks in Android

How to set focus on WPF control from viewmodel when search button async command executed

20 Aug 2018 by Graeme_Grant

You can do it in code behind however can get messy if you have to do it for multiple controls. The answer is, where you need to use the code in more than one time, to use a behavior rather than code behind to encapsulate the code to avoid the same code in multiple places, reduces errors, and...

How to set focus on WPF control from viewmodel when search button async command executed

20 Aug 2018 by Waqar (Vicky)

In my code behind i have a method OnFocusRequested which is called using Interface from my ViewModel when async search button command execute. the problem is that it is working fine when i just debug through each step from code. this code is not work in real time. I believe this is due to async...

Asynchronous programming async and await

9 May 2018 by User 7429338

The warning means that you declared your method to be asynchronous, while the method is actually synchronous. You could make your method asynchronous like so: public async void ProcessRequests(object sender, ElapsedEventArgs args) { await Task.Run(() => { ...

ASP.NET

Asynchronous programming async and await

9 May 2018 by wizklaus

it Returns no value Severity Code Description Project File Line Suppression State Warning CS4014 Because this call is not awaited, execution of the current method continues before the call is completed. Consider applying the 'await' operator to the result of the call. What I have tried: ...

ASP.NET

Unable to create a dynamic byte[] to process data received through async TCP socket response

18 Mar 2018 by Richard MacCutchan

You are (effectively) using a static data buffer for your input messages, so any time some data arrives it has the potential to destroy what is already there. You should allocate your buffer in the async event handler, capture the data, and pass the buffer off to the method that will process it....

TcpClient

Unable to create a dynamic byte[] to process data received through async TCP socket response

18 Mar 2018 by honeyashu

In my C# code I am receiving a byte[1024] from a DLL through TCP link. Code I did for this I am attaching below. The workflow is An asynchronous packet gets received at tcp port into a byte array, which then gets copied to a different array for processing. This copied array then gets...

TcpClient

Task support for asynchronous controllers about how to implement the classs for "sportsservice" by TAP

How load data asynchronously using ASP.NET webform

8 Dec 2017 by Member 13363439

Hi i have 3 method i want to load data like First come First Display.means which method execute first that should display in UI part .it should not wait for all method to be Complete. Here is My Sample code. this code is waiting for all function to be complete than page is loading.please help me...

The astounding Pickover's biomorphs

27 Nov 2017 by Miguel Diaz Kusztrich

An infinite set of biological shape fractals in the complex plain

21 Sep 2017 by Member 13390764

By Checking the result,i know , if the service calls are made asynchronously (in parallel), the total response time will be slightly more than 8000 millisecond, NOW ,MY QUESTION IS the Class for "WeatherService" How to implement ,1 think ,I also use the EAP to solve the problem,but now TAP ...

MVC

controller

Task support for asynchronous controllers about how to implement the classs for "sportsservice" by TAP

21 Sep 2017 by Richard Deeming

When you use await, the rest of the method doesn't execute until the task you're waiting for has finished. If that task takes 8 seconds, the next task won't start until at least 8 seconds later. You need to start all three tasks at once, then wait for them all to finish. public async...

MVC

controller

How do I convert sqldatarerader to aysnc/awaits?

25 Aug 2017 by DotNetFellow

hi I have been trying to get SqlDataReader to work using Async/Awaits but without much success. I got IEnumerable, cannot convert Task to SqlDataReader and some other errors. Here is basically my code and I must thank in advance to anybody who can really lend a hand to help out. //App_Code...

SqlDataReader

How do I convert sqldatarerader to aysnc/awaits?

25 Aug 2017 by Graeme_Grant

Those links are one side of the solution, the other is how to handle async calls in ASP.NET Webforms. I used this search: asp.net async webforms - Google Search[^] and found these two very helpful links for you: * Using Asynchronous Methods in ASP.NET 4.5 | Microsoft Docs[^] * The Magic of...

SqlDataReader

Hangfire: the type does not contain a method with signature

27 Jul 2017 by ervat

Page1.aspx.cs string strMsgID = //task1 returns a value; BackgroundJob.Enqueue(() => doLongJob(strMsgID)); public void doLongJob(string strMsgID) { int status = //task2(strMsgID); while( status == 2) { Thread.Sleep(10000); status = //task2(strMsgID); } }...

.NET

WebForms

Using HttpClient As It Was Intended (Because You’re Not)

1 Jul 2017 by Bob Crowley

Using HttpClient as it was intended

Understanding callbacks through Asynchronous Execution of SQL request.query in node js

31 May 2017 by Member 13040242

We are going to talk about the problem faced because of asynchronous nature of SQL query execution in node js and the solution for it.

How do I know the lists of error while serial communications?

12 Apr 2017 by Member 12330615

Hi, I want to make a code which send data to another server via serial communications. But only sending is accepted but no receiving any other data or error messages from counter part. So I - sending part application - must assume whether the sending is ok or not. How and what kind of these...

VC++

How do I know the lists of error while serial communications?

12 Apr 2017 by Jochen Arndt

If you have a uni direction communication you can't detect such errors. All you can do on the sending side is checking for interface errors when writing to the device. But such will usually not happen with serial interfaces when the device has been opened successfully. But you may use hardware...

VC++

Return value from batch async operation

9 Apr 2017 by nmeri17

I have a small library that should run a couple of async operations and return an object containing the result of those operations but the interpreter either says the function is not a constructor or when it accepts the constructor, the operation returns an empty object. I think my problem has...

recursion

Return value from batch async operation

9 Apr 2017 by Patrice T

When you don't understand what your code is doing or why it does what it does, the answer is debugger. Use the debugger to see what your code is doing. Just set a breakpoint and see your code performing, the debugger allow you to execute lines 1 by 1 and to inspect variables as it execute, it is...

recursion

Pseudo asynchronous reading using multi threading in C#

31 Mar 2017 by RickZeeland

I think you first need to read up on Tasks (which is the modern way of threads). Here is a good article about it: Task Parallel Library: 1 of n[^] As you already mentioned "Pseudo", it is probably best to not let all Tasks access the same USB port simultaneously. When working with Tasks you can...

RFID

threads

Pseudo asynchronous reading using multi threading in C#

31 Mar 2017 by Member 13097876

I am developing winforms application using C#. This app uses ThingMagic USB Plus RFID "M5e" reader in order to scan the tags that found. I have the manual of the reader which is Mercury API and it provides codelet sample. In the attached samples, there is not any Pseudo Asynchronous example, but...

RFID

threads

How do I stop async await in VB.NET?

23 Mar 2017 by Richard Deeming

Use a CancellationTokenSource[^] and a CancellationToken[^]:Private _cts As CancellationTokenSourcePrivate Async Function Flash(ByVal token As CancellationToken) As Task While Not token.IsCancellationRequested Await Task.Delay(100, token) Label1.Visible = Not...

How do I stop async await in VB.NET?

23 Mar 2017 by dell-gl62m

I have async await method in my form that I called when button1 is clicked. How do I stop the async await when I click button2?What I have tried:Private Async Sub Flash() While True Await Task.Delay(100) Label1.Visible = Not Label1.Visible End WhileEnd SubAbove code...

Multi-threading in C#: Back to Basics (Part 1 of N)

24 Jan 2017 by Jon McKee

Exploring multi-threading and related topics.

I am stuck with this

18 Jan 2017 by OriginalGriff

We do not do your homework: it is set for a reason. It is there so that you think about what you have been told, and try to understand it. It is also there so that your tutor can identify areas where you are weak, and focus more attention on remedial action.So read your course notes, look at...

Graph Intersection - A Map Reduce Approach with Akka

14 Dec 2016 by Paolo Parise

Graph intersection using map reduce and Akka

Create OData endpoint for MongoDB on MEAN stack

28 Nov 2016 by Neal Pandey

This article is a tutorial on creating a basic OData (Open Data Protocol) endpoint for a MongoDB database using MEAN stack.

Responsive Applications with Asynchronous Programming

7 Nov 2016 by Dirk_Strauss

In this article by Dirk Strauss, author of the book C# Programming Cookbook, he sheds some light on how to handle events, exceptions and tasks in asynchronous programming, making your application responsive.

WinForms

Why do we need ajax/jquery calling for colntroller method when we already have default functionality given by MVC?

30 Oct 2016 by sunil kumar meena

Suppose in a sample application there is a SUBMIT button, and in FORM tag I've alreasdy set POST method. So when I click on submit button it'll automatically execute respective controller's action. This id already there in MVC. Then why do we need AJAX or jQuery for the same purpose, i.e....

Why do we need ajax/jquery calling for colntroller method when we already have default functionality given by MVC?

30 Oct 2016 by Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

If you don't want to reload the page, then Ajax is the solution. You can send data to server and do everything without a post back.

Just let me know is the following code executed as asynchronously ?

12 Jul 2016 by Anisuzzaman Sumon

Dear Experts,Just let me know is the following code executed as asynchronously ?My Code is shown belowpublic class CompanyController : Controller {public delegate void CompanyAuditRecordKeeper(CompanyModel company, string operationType); public ActionResult Create(CompanyModel...

C#3.5

delegates

Just let me know is the following code executed as asynchronously ?

12 Jul 2016 by OriginalGriff

The short answer is "maybe".The official documentation says: Executes the specified delegate asynchronously with the specified argumentswhich is pretty clear!But... It goes on to say:on the thread that the control's underlying handle was created on.Which means that it does get executed...

C#3.5

delegates