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The Impossibly Fast C++ Delegates, Fixed

by Sergey Alexandrovich Kryukov

Derived work based on the article by Sergey Ryazanov "The Impossibly Fast C++ Delegates": this good solution is fixed and further developed using C++11.

Asynchronous Multicast Delegates in Modern C++

by David Lafreniere

A C++17 standards compliant delegate library capable of targeting any callable function synchronously or asynchronously

Variadic Delegates

by Anton Chibisov

This tutorial showcases how to implement C++ delegates which are capable of being bound to methods and functions having arbitrary signature, i.e., any number and type of parameters and return value.

Monad like programming with C#

by Muraad Nofal

A haskell monad/(applicative)functor like interface in C# that extends IEnumerable.

Latest Articles

Asynchronous Multicast Delegates in C++

by David Lafreniere

A C++ standards compliant delegate library capable of targeting any callable function synchronously or asynchronously

Asynchronous Multicast Delegates in Modern C++

by David Lafreniere

A C++17 standards compliant delegate library capable of targeting any callable function synchronously or asynchronously

Extract and manipulate event handler delegates of Windows form controls

by yutaraa

Get, move, copy and delete event handler delegates of Windows form controls.

C++/CLI: Storing Lambda in a Delegate

by Jon McKee

How to do it and why it works

All Articles

Delegates

[Concept] Delegate,Lamda Expression c# windows form

30 Nov 2013 by agent_kruger

i would like to know the concept of Delegates and lambda.Example code will be appriciated. Thanks In Advance.

[Concept] Delegate,Lamda Expression c# windows form

30 Nov 2013 by OriginalGriff

If you have "refered many google links" then what do you expect us to tell you that you haven't found? Especially in a little textbox like this?Go back to Google, and look again: it contains a huge amount of information on the subject which will better answer a general question such as this.

[Concept] Delegate,Lamda Expression c# windows form

30 Nov 2013 by Karthik_Mahalingam

Try these linkmight be useful for you.C# Delegates, Anonymous Methods, and Lambda Expressions – O My![^]this link contians basics of lambda very informative...

A AsyncCallback of a Delegate opens a non reponding form

19 Sep 2011 by Member 7835126

Hello!I'm trying to use a async Delegate to show and populate a form but the form show up and stays Not Responding.Normally the form opens OK when it's sync with the code.Example situation:Before Class:Public Delegate Sub MyAsyncDelegate()In primary sub:Dim del As...

A Beginner's Tutorial on Basics of Delegates, Anonymous Functions and Lambda Expressions in C#

7 Dec 2012 by Rahul Rajat Singh

This article discusses delegates and how to write delegate handlers using functions, anonymous functions and Lambda expressions.

A Mimetic C# Style Multicast Event Implementation with C++

26 Aug 2013 by paladin_t

A Mimetic C# Style Multicast Event Implementation with C++

Altering the way a function operates

7 Dec 2018 by C Pottinger

Hello Code Project Gurus I know it is possible to have delegates operate with values that are known at the time the delegate is called - that's simply a parameter e.g. Func areaOfCircle = r => Math.PI * Math.Pow(r, 2); Func diameterOfCircle = r => 2 *...

Altering the way a function operates

6 Dec 2018 by Dave Kreskowiak

You cannot change the delegate definition at runtime. A delegate is nothing but a pointer to a function. The parameter list of the delegate must match the parameter list of the function that it points to. If it doesn't you can unbalance the stack as the call is pushing parameters on the stack...

Altering the way a function operates

7 Dec 2018 by Richard Deeming

Something like this would work: Func> factoredAreaOfCircle = factor => r => factor * Math.Pow(r, 2); Func> factoredDiameterOfCircle = factor => r => 2 * factor * r; Func iNeed = factoredDiameterOfCircle(3);...

Anonymous Method in Delegates

2 Jun 2014 by ShaHam11

Hi , Can some one help me to convert this Delegate program method to anonymous method using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace Delgates_Ex1{ public delegate void ExampleDelgate(int x, int y); class Democlass ...

Anonymous Method in Delegates

2 Jun 2014 by CPallini

Here you are (see MSDN[^]) static void Main(string[] args) { Democlass d = new Democlass(); ExampleDelgate e1 = new ExampleDelgate(d.Add); ExampleDelgate e2 = delegate(int x, int y){ Console.WriteLine(x+y);}; // anonymous method e1(20, 10); e2(20,...

Anonymous Method in Delegates

2 Jun 2014 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.Try it yourself, you may find it...

Asynchronous Multicast Delegates in C++

19 Dec 2022 by David Lafreniere

A C++ standards compliant delegate library capable of targeting any callable function synchronously or asynchronously

Asynchronous Multicast Delegates in Modern C++

19 Dec 2022 by David Lafreniere

A C++17 standards compliant delegate library capable of targeting any callable function synchronously or asynchronously

Asynchronous Programming

12 Nov 2013 by John Pravin

Asynchronous Programming with Task Parallel Library.

BackgroundWorker shows progress but main thread might need to show progress too

5 Apr 2012 by bobishkindaguy

SOLVED - PLEASE SEE COMMENTS BELOW IF YOU ARE INTERESTED IN HOW THIS WORKED OUT, SINCE IT IS A 2-PART SOLUTION, BOTH OF WHICH ARE POTENTIALLY USEFUL TO OTHERS.Often, users will go to my program's "import data" window to initiate an import of data from a file or spreadsheet to our database....

BackgroundWorker

BackgroundWorker shows progress but main thread might need to show progress too

5 Apr 2012 by Pablo Aliskevicius

I've done something similar in the past.I noticed this:Events can happen hundreds of times per second, but users don't read that fast.A process can send thousands of updates to the progress form, but a progress bar won't be more than a few hundred pixels wide.Drawing is...

BackgroundWorker

Building OrderBy Lambda Expression from Property Name in C#

10 Sep 2014 by DiponRoy

Let's make a lambda expression from a property name of a particular entity, and use it for OrderBy shorting

C# Expression Confusion

22 Aug 2013 by YourAverageCoder

Hi, i have a problem with following declaration:T Single ( Expression > expression, params Expression >[] includes ) where T : class;Now i get it that T is a generic type but what i don't get are the "Expression" and "params" data types. Googling...

C# Expression Confusion

22 Aug 2013 by OriginalGriff

Neither the Expression or the params are datatypes: the former is similar to Func but returns a tree rather than a value (There is a good description here: http://stackoverflow.com/questions/793571/why-would-you-use-expressionfunct-rather-than-funct[^]).params is a C# keyword that lets you...

C# Like Event Handlers Pattern in Java

26 Mar 2017 by Danilow

Simulating C# event handlers in Java

C# Register Two Events, but only one reaction, please help me

2 Nov 2011 by HAOYE850815

Dear guys, I am currently working on a GPS tracking software. It should implement a function to trigger GPS data logging if GPS enter in a specific area and stop logging after going out of boundary.Anyway, My problem is if I select GPS as a observable object and make a GPSMonitor class...

C# Register Two Events, but only one reaction, please help me

2 Nov 2011 by Nish Nishant

Is this a typo?gpsmonitor.GeofenceOutPositioned += new GPSMonitor.PositionInGeofenceEventHandler(RaiseInEvent);gpsmonitor.GeofenceOutPositioned += new GPSMonitor.PositionInGeofenceEventHandler(RaiseOutEvent);If not, there's your bug.

C# Tips – Using delegate in List.Find() Predicate

20 May 2012 by cpsglauco

How to use delegate in List.Find() predicate in C#

c# using delegates to communicate between forms and networkcommunicator class

29 Dec 2012 by Cyberbird85

Hello everyone!I'm trying to develop an application in c# i currently have a code similar to the one attached below.Basically what it does is:Having multiple form, each of which would like to send message through the network, using my NetworkCommunicator class's SendMessage method.The...

c# using delegates to communicate between forms and networkcommunicator class

29 Dec 2012 by Christian Graus

You can't do anything OO over the network, because you have two different exes running. You can't use delegates between two exes on two machines.

C# what passes arguments to anonymous functions?

23 Mar 2018 by The_Unknown_Member

I'm reading a book and I have problems understanding this code: List evenNumbers = list.FindAll(delegate(int i) { return (i % 2) == 0; }; I cannot understand what will happen with this code. Who passes the argument to the parameter i and how? I'm really confused. What I have...

C# what passes arguments to anonymous functions?

23 Mar 2018 by #realJSOP

Google is your friend. Anonymous Functions (C# Programming Guide) | Microsoft Docs[^]

C# what passes arguments to anonymous functions?

23 Mar 2018 by User 7407470

For every element in the List 'list' the .NET method 'FindAll' calls the delegate method to get a value (true or false) indicating whether the value should be added to the List 'evenNumbers'. So, the .NET method 'FindAll' passes the value i to the delegate method. ...

C++ universal-signature delegates

4 Feb 2019 by Timothy Hogan

In my embedded program I have a 5 "soft keys" arranged with a LCD screen. What I would like is to have a pointer for each button that can point to free functions or member functions and can take any signature. This pointer will need to be redirected to other functions at runtime. Obviously I...

C++ universal-signature delegates

4 Feb 2019 by Richard MacCutchan

There is no easy way around this, since the compiler needs to check the call matches the function signature. You could define each function to take a void* as its only parameter and then cast it internally to the correct structure. Or you could use the varargs option where you pass one fixed...

C++ universal-signature delegates

4 Feb 2019 by CPallini

As far as know, without considering 'dirty hacks' (trying to defeat the strongly typed nature of C++), you cannot do that. I would use just one function signature and then adapt all of my functions to comply with it. Within this approach you might possibly find useful std::function[^].

C++/CLI: create a delegate via reflection

17 Aug 2023 by hans.sch

I'm playing with C++/CLI and calling into a .NET assembly. There is no specific use case, I simply want to learn. I wrote the assembly in C#. It exports a class with a few methods, and a delegate type which is used in one of the methods:...

C++/CLI: create a delegate via reflection

18 Aug 2023 by Maxim Kartavenkov

had you try the next way: int MyCallback(int i) {} public delegate int IntCallback(int i); IntCallback^ callback = gcnew IntCallback(MyCallback); // Use callback variable as an argument

C++/CLI: Storing Lambda in a Delegate

1 Dec 2017 by Jon McKee

How to do it and why it works

Call a method present in a form which is there in other project using delegates

2 May 2012 by Ramana Bellary

I have two projects Project1 and Project2. I have refernce of Project2 in Project1.I have declared a Delegate in Project2 and on click of button I am invoking the Delegate.Project2 - Form2 Code :Public Delegate Sub ExternalDelegate()Public Class Form2 Public Event Del As...

Call method using reflection with better performance

19 Aug 2017 by MYQueries1

I am using the Invoke method to call method using reflection. Performance of this not great. Is there any other solution What I have tried: void ExecuteMethodViaReflection(TestObj comm) { var paramNames = comm.paramNames; //of type string array var paramData = comm.Data; //of type...

Call method using reflection with better performance

18 Aug 2017 by Mehdi Gholam

First don't use reflection unless you need it and you know what you are doing, so if your method counts is low use a switch statement: switch(comm.Method) { case "method1" : this.Method1(comm.Data); break; ...// and so on } You can also use a Dictionary with...

Call method using reflection with better performance

19 Aug 2017 by Graeme_Grant

Expanding on Mehdi Gholam's solution, here is a real-life example of where the method ProcessFileType "discovers" the type of data that it needs to convert to, looks up the type of data, then executes the conversion from JSON string and returns a class structure of a specific type. // only some...

Calling a method in C# asynchronously using delegates

23 Jul 2012 by Shabbir Lathsaheb

Another useful feature of delegates is the ability to execute a method asynchronously. That is, through a delegate, you can begin invocation of a method and then return immediately while the delegate executes its method in a separate thread.

Calling functions one after other in event driven programming

23 Jan 2018 by Ammar Shaukat

I'm working on a software where software issues commands for hardware panel and once a command is issued, its response received after few seconds . there are different functions for different hardware commands like public void FunctionA() { StartCommandA(); } and other functions on the...

design-patterns

Calling functions one after other in event driven programming

23 Jan 2018 by johannesnestler

have a look at the Task class Task Class (System.Threading.Tasks)[^] and to the ContinueWith methods. This is what you want: call methods each in it's own Task (thread) - wait for method to execute while not blocking the rest of your app. After executing continue with next method call (in it's...

design-patterns

Calling functions one after other in event driven programming

23 Jan 2018 by Ammar Shaukat

Make a list of Action Delegates and add Status Code for each function . let's say 0 mean function has invoked and 1 mean function is not invoked yet. then use LINQ Query to check which function has called and which one is remaining. Change the status of function invocation from OnReponse ...

design-patterns

Can I Combine 2 Different Delegates

31 Oct 2015 by petarpetrovt

class Foo{ [DllImport("kernel32.dll", EntryPoint = "GetProcAddress")] private static extern IntPtr GetProcAddress(IntPtr hModule, string procName); public delegate void TestMethod(uint cap); public static TestMethod Method; static Foo() { Method =...

Can I Combine 2 Different Delegates

31 Oct 2015 by phil.o

delegate void EnclosingDelegate(string parameter);delegate string EnclosedDelegate();class foo{ void main() { EnclosedDelegate enclosed = () => "foo"; EnclosingDelegate enclosing = (s) => s = enclosed(); }}Is that what you are searching for?

Cannot convert lambda expression to type bool

11 Dec 2017 by dhivya N

I am a new learner of c#. I want to find a number is odd or not using delegate anonymous function. I am getting the the above error. Where am i going wrong? What I have tried: public delegate bool oddOREvenDelegate(int s); class Program { static void Main(string[] args) ...

Cannot convert lambda expression to type bool

11 Dec 2017 by ________________

You do not need to create delegate twice: public static bool CheckisOdd(int s) { if (s % 2 == 0) { return false; } else { return true; } }

Cannot convert lambda expression to type bool

11 Dec 2017 by phil.o

You can also do shorter: public static bool CheckisOdd(int s) { return ((s % 2) != 0); } or quicker: public static bool CheckisOdd(int s) { return ((s & 1) == 1); }

Cannot convert lambda expression to type bool

11 Dec 2017 by George Swan

public static void Main (string[] args) { //define a delegate that takes an int and returns a bool Predicate CheckIsOdd=i=>i%2!=0; //call the delegate and write the result Console.WriteLine(CheckIsOdd(5)); //An alternative approach using an anonymous function...

Changing Button Property not reflecting in UI during Runtime in Windows Form Application C#

27 Mar 2014 by Divakar Raj M

I am trying to interactively change button properties in the UI visually. I have a sole button in my Windows Forms application and this is my code for the button clickprivate void button1_Click(object sender, EventArgs e) { button1.BackColor = Color.Red; ...

Changing Button Property not reflecting in UI during Runtime in Windows Form Application C#

27 Mar 2014 by Raul Iloc

You should invoke button1.Refresh() after each change of color, but before Thread.Sleeep()!

Changing Button Property not reflecting in UI during Runtime in Windows Form Application C#

27 Mar 2014 by OriginalGriff

Simple: don't use Sleep at all.Sleep suspends the current thread, so it does absolutely nothing until the time period has expired. Since it is the UI thread (or you wouldn't be in the Click event handler) that means that the thread that updates the display is suspended - so the display won't...

Code is not working,pls have a look

28 May 2014 by Rakesh Agarwal1984

public partial class _Default : System.Web.UI.Page { public delegate void mydelegate(); public event mydelegate myevent; protected void Page_Load(object sender, EventArgs e) { } protected void Button1_Click(object sender, EventArgs...

Code is not working,pls have a look

28 May 2014 by OriginalGriff

Well no - they won't. You aren't calling them at all - you are just adding them to the list of methods to call when you do action the delegate. In fact, each time you press the button, you add four more methods to the list, so if you did call the delegate itself, after the first press it would...

Create a delegate from methodinfo (2)

23 Mar 2017 by Ralf Meier

My Situation is that I want to have a Delegate to a method from a Control.For that I use the code as follows : Private RepeatDelayCounter As Integer = 0 Private RepeatControl As Control = Nothing Private Delegate Sub delegate_OnClick(instance As Control, e As...

Create a delegate from methodinfo (2)

23 Mar 2017 by Richard Deeming

Based on some crude testing, I suspect the problem is actually the other way round: you can create the delegate when the method hasn't been overridden, and you can't create the delegate when the method has been overridden.Class Foo Protected Overridable Sub Click() ...

Delegates & Events

23 Jul 2012 by PratapReddyP

In this post, we will go back to basics of C# concepts. From the time when i am new to .Net development till today, one of the first five C# questions is" What is a Delegate? What is an Event? What are the Differences? "

Delegates (Delegate, Func, Predicate, Action and Lambda)

8 Nov 2014 by Mahdi K.

A detailed description for Delegate, Func, Predicate, Action and Lambda Expression.

Delegates and events.

4 Jul 2012 by ErickTreeTops

i'm trying to understand delegates and events and wrote a simple app based on an example.namespace DelegateTest{ public partial class Form1 : Form { BroadcastClass B = new BroadcastClass(); ListenToClass1 L1 = new ListenToClass1(); ...

Delegates and events.

4 Jul 2012 by Richard MacCutchan

I don't know where you found your example but Microsoft provide a very good one here[^].

Delegates getting garbage collected

15 May 2020 by MAU787

hi alli have one application which calls one function from dll.that dll invokes one delegate for capturing fingerprint.but after 4-5 capture i m getting error..A callback was made on a garbage collected delegate of type...

Delegates getting garbage collected

15 May 2020 by martonthenagy

This may be useful for You: .net - Call has been made on garbage collected delegate in C#? - Stack Overflow[^]

Delegates name of method.

6 Jan 2015 by Inimicos

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace delegateexample{ delegate int somedelegate(int i); class someclass { public static int somemethod(int i) { return i...

Delegates name of method.

6 Jan 2015 by Matt T Heffron

If I understand your question, you've almost got it correct in your code above: class Program { static void Main(string[] args) { somedelegate process = new somedelegate(someclass.somemethod); // NOTE: no parens () process(4); } ...

Delegates name of method.

6 Jan 2015 by Sergey Alexandrovich Kryukov

Solution 1 is only good for static methods. Yes, you asked about static methods, but this is not the only possibility. But this is also possible with the class instance. Compare: delegate int SomeDelegate(int i); class Implementation { internal int SomeMethod(int i) { /*...

Delegates with return type

30 May 2014 by ShaHam11

Hi I have two methods with return type one being instance and the other one is static method. I am trying to access those methods with delegates but i am unable to access it i get a error " Has wrong return typeusing System;using System.Collections.Generic;using System.Linq;using...

Delegates with return type

30 May 2014 by Thomas Daniels

Change the return type of your delegate from void to int:public delegate int ExampleDelgate (int x, int y);Also, when you try to access the mul method with a delegate, you should pass 30 and 10 as parameters and not as a multiplication:ed = new ExampleDelgate(Democlass.mul);//ed(30...

Delegates with return type

30 May 2014 by CHill60

ProgramFOX has solved your problem, however you may also find this CodeProject article useful - C# - Delegates 101 - A Practical Example[^]

Delegates with return type

30 May 2014 by Sergey Alexandrovich Kryukov

In addition to the correct Solution 1:You don't need a separate delegate type declaration for such a simple signature; it is already done for you and is System.Func. You don't need a separate type declaration at all:System.Func ed = new System.Func

Delegates, Events and Pass by ref in Java using bytecode Manipulation

15 May 2012 by abhinav_soni

Support for Delegates, Events and Pass by ref in Java using bytecode manipulation

Delegates, Multicast delegates and Events in C# - Notes

1 Dec 2015 by Shivprasad koirala

In this article we will try to understand Delegates, Multicast delegates and Events in C#

Delegation Issues in VB.NET

5 Jan 2012 by Nara Har

Hello All,I have a form and I want to ensure that none of the input fields should be left blank and the txtUPrice should hold only numeric values.The below is the code that I devised.Initially when I checked for focus issues (Initial IF structure) it went fine. But when I...

Delegation Issues in VB.NET

6 Jan 2012 by Estys

Yes, your second "if" is messing things up.Try If x.Text = "" Then x.Focus() ErrPvdr.SetError(x, "Cannot be a blank input") ElseIf x.Name = "txtUprice" And (Not IsNumeric(x.Text)) Then x.Focus() ErrPvdr.SetError(x, "Cannot...

Does anyone have a simple way of making this TreeView WinForm app multithreaded – the UI locks up.

20 Oct 2013 by Member 8392278

Does anyone have a simple way of making this TreeView WinForm app multithreaded – the UI locks up. I have experimented with the backgroundworker , treeview.invoke and delegates but need help in these areas. Thank you in advance for any assistance.

BackgroundWorker

Does anyone have a simple way of making this TreeView WinForm app multithreaded – the UI locks up.

18 Oct 2013 by OriginalGriff

Doing the Threading stuff is pretty easy - a Background worker will handle that: BackgroundWorker work = new BackgroundWorker(); work.DoWork += new DoWorkEventHandler(work_DoWork); work.ProgressChanged += new...

BackgroundWorker

Doing Delegates Differently - Part 1

8 Nov 2015 by DotNetSteve

Using delegates to group, conquer cross cutting concerns and create dynamic validators

Doing Delegates Differently - Part 2

8 Nov 2015 by DotNetSteve

Using delegates to group, conquer cross cutting concerns and created dynamic validators

Dynamic Runtime Delegates Conversion

30 May 2017 by n.podbielski

Explanation how to convert from one delegate type to second delegate of unknown or dynamically created type when their signatures match.

Error on execution of a method (.NET / COM)

28 Jun 2013 by Jeneesh K. Velayudhan

Thank you, Ron Beyer...It worked...:)

static-code-analysis

Error on execution of a method (.NET / COM)

27 Jun 2013 by Jeneesh K. Velayudhan

I have one Initialize() in my class and I am calling a delegate wrapper method from this function as follows (the call back method will call around 20 times in a sec),public Initialize(){ CX_OUTPUT_CALLBACK cb = new CX_OUTPUT_CALLBACK(OutDelegateCb); ...

static-code-analysis

Error on execution of a method (.NET / COM)

27 Jun 2013 by Ron Beyer

public Initialize(){ CX_OUTPUT_CALLBACK cb = new CX_OUTPUT_CALLBACK(OutDelegateCb); AureusSDK_Wrapper_VideoCallbackFunSetup.CX_SetOuputCallBack(cb, cnt); GC.KeepAlive(cb);} public static void OutDelegateCb(IntPtr p_aureus_video_output,...

static-code-analysis

Events and Delegates in Standard C++

10 Jan 2014 by Slavisa

Events and Delegates in Standard C++ implemented using Macro functions

Events: Demystifying Common Memory Leaks

30 Aug 2013 by Dev Leader

Let’s see how events might be causing some leakage in your application.

Everything That You Need to Understand about Lambda Expressions

15 Jan 2015 by Bhushan Mulmule

This write-up will take you through all the steps that are required to understand lambda expression thoroughly.

Extensions and Reflections and Generics oh my!

5 Mar 2017 by DotNetSteve

Creating an extension class for View Models to save public properties using Generics and Delegates, replacing a reflection implementation

Extract and manipulate event handler delegates of Windows form controls

14 Jan 2020 by yutaraa

Get, move, copy and delete event handler delegates of Windows form controls.

Firing events in loop are not updating UI in sequence

29 Nov 2015 by sunil kumar meena

I was trying to update status on UI for a Long Running Operating. I've created a demo form based application, task it have multiple rows, each row is having days and default values in each column of datagrid is 0, once computation file computes one iteration for one day it will update UI and set...

multi-threading

Firing events in loop are not updating UI in sequence

29 Nov 2015 by George Jonsson

I think the problem is that you when you pass the event argument, you don't pass it is a value but as a reference. See Parameter passing in C#[^]As you only create one instance of MessageEventArgs me = new MessageEventArgs();, you only have one place in the memory where your data is...

multi-threading

Flutter searchdelegate is not working with navigator 2.0 with routerdelegate

6 Oct 2021 by dotarsoyak

Hello I have an implementation of Flutter Navigator 2.0 in my app, wich one has a SearchDelegate implemented too, but when I do tap on the search box search button, my app launch an error, the console prints this message: I think I have a bad...

Generic Methods Implementation in Microsoft Fakes

19 Oct 2014 by Nikita Mazhara

Describes how to implement generic methods for Microsoft Fakes Stubs and Shims using reflection constructed delegates at runtime

How can I push notification feature for my web application ( a small online store). I really am very confused

3 Nov 2015 by Ayesha_K

Somebody suggested me to do it with Jquery . I don't know where to start from but the scenario is that I need an online shopping store website,in which on clicking on 'ORDERNOW" button on "Add to cart"'s window ,the notification is pushed on admin panel which tells about that particular order's...

How can I push notification feature for my web application ( a small online store). I really am very confused

11 Nov 2015 by uddyorizu

may be signalR could help you here.As am not sure if you mean the mobile app push notifications, do forgive if its not what you need.see http://www.asp.net/signalr[^]

How can I set thread handle in that thread

21 May 2016 by Abtin Bina

i have an object that it have a 'Thread' property like this class Client{ public Thread ClientThread; // it is that i want to change //some property //some method }how can i set the ClientThread in a started threadlike what i have triedWhat I have...

How can I set thread handle in that thread

21 May 2016 by Sergey Alexandrovich Kryukov

You can find some useful ideas in my past answers:http://www.codeproject.com/Answers/536542/anplusamateurplusquestionplusinplussocketplusprogr#answer2[^],http://www.codeproject.com/Answers/165297/Multple-clients-from-same-port-Number#answer1[^],specifically on the problem of disconnection:...

How do I convert a function taking a func[T] to be asynchronous?

26 Aug 2020 by Patrick Skelton

I have a class that has a function that runs the supplied delegate, which is of type Func, as shown in the following code. public static class FunctionRunner { public static int RunSuppliedFunction( Func aFunctionReturningInt ) =>...

How do I convert a function taking a func[T] to be asynchronous?

26 Aug 2020 by Richard Deeming

The return type of an async function will need to be Task or ValueTask, so your delegate type will be either Func> or Func>. The function runner effectively doesn't care whether or not the function is async - it just...

How do I convert a function taking a func[T] to be asynchronous?

26 Aug 2020 by Patrick Skelton

With the helpful nudge from @Richard Deeming, I have got the code compiling like this (which also moves a step closer to showing what the point of all this is): public static class FunctionRunner { public static async Task...

How Do I Cross-Threading Help

24 Apr 2014 by nazarinlaw

Hello everyone, im really sorry if i did anything wrong, i just don't know how to make this thing works ! So everyone here's the class i made it to store the logs into TextBox / txt.Public Class EventLogger#Region " Events " Public Event EntryWritten As...

How Do I Cross-Threading Help

24 Apr 2014 by Sergey Alexandrovich Kryukov

There is no such concept as "invoke in class". This is irrelevant. It's important in what thread you are running some code. There are two very different cases: if you need to invoke some operation to a UI thread, or to do it in some custom thread. I answered both question in detail in my past...

How do I get the number of event subscribers in the add and remove blocks?

14 Mar 2017 by Patrick Skelton

If I use the explicit syntax for declaring an event, is it possible to get the number of subscribers inside the add {} and remove {} code blocks? For example:public event EventHandler MyEvent{ add { MyEvent += value; // Can I get a count of subscribers here? ...