No, you don't. Trust me on this. If you start handling text changed events in your C# code, then your user is in for a slow and uncomfortable user experience - as every key he types has to do a round trip to the server in order to be processed, and that's slow. Very slow. It also requires a full...

.NET

event-handler

Fire Insert and Update Stored procedure from One Button Click

30 Jul 2013 by Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

As far as I understand, you are populating the TextBox when LinkButton is clicked. So, you must be binding the Primary Key value of each row in GridView.Else bind that by using the DataKey property of GridView.Now, try to get the DataKey of the Row, when LinkButton of that Row is...

ASP.NET

stored-procedure

event-handler

Timer tick event is automatically disabled by Picturebox paint event

22 Feb 2014 by Sergey Alexandrovich Kryukov

Dave Kreskowiak is right, please see his comment to the question. Nothing is cancelled or disabled.Not only handling Paint event of the PictureBox makes no sense, using PictureBox for rendering graphics makes no sense at all (even though it is possible). This is just a control designed to...

Task EventHandlers – The Little Secret You Didn’t Know

19 Feb 2023 by Dev Leader

Secret of Task EventHandlers

event-handler

exceptions

Async

create Button dynamically and also Click Event !

13 Sep 2013 by CHill60

C# is case sensitive - rename your function from button1_click to button1_Click

WinForms

event-handler

Prevent pressing of a key in a textbox

20 Sep 2013 by Sergey Alexandrovich Kryukov

You cannot prevent pressing any key by the software, quite apparently. :-)You can make some control ignoring some clicks. For example, this is how to filter out all characters but digits:

Dynamic Controls Event Handling

8 Jan 2015 by OriginalGriff

Um...you did notice the sender parameter?Cast the sender as a Button, and you should be able to access the ID property for the specific button that was clicked.

ASP.NET

event-handler

Parameter

What happens when a thread with active event handler exits ?

29 Mar 2016 by Sergey Alexandrovich Kryukov

You have to use an event wait handle object. No way you should do Sleep, any spin wait, nothing like that. If you wait for some object, your thread goes to a wait state: it is switched off and not scheduled back to execution until it is waken up, spending zero CPU time in wait state. You can...

.NET

event-handler

threads

Problem raising an custom event handler?

28 Jun 2018 by F-ES Sitecore

The parser has an event (DataReceived) that no-one is subscribed to. The only thing that subscribes to that event is the DataReceivedEventSubscriber, but it subscribes to the event of an instance of CurrentDataDataRespParser that is internal to itself, so the only time that event is going to...

Why some commands to serial port are accepted with a right respond and other not

22 Jul 2018 by Jochen Arndt

The data received handler is executed in another thread. That is why you have to use Invoke to update the content of your text box from. Similar applies to the DataToSetandGet variable used there to store the received string. You can't use it from other threads (like the GUI / main thread as in...

event-handler

read/write

serial-port

How do I access code within static if it seems I need the static modifier?

25 Jan 2022 by Tony Hill

If it is a static method you should call it like this. protected void CertLogin_Click(object sender, EventArgs e) { CertSelect.GetClientCertificate(); }

event-handler

certificate

How do I access code within static if it seems I need the static modifier?

25 Jan 2022 by OriginalGriff

To add to Tony's solution, let me explain the difference between static and non-static objects. C# is all about classes: everything is part of a class. But they aren't all the same. If you think of cars instead of computers for a moment, you...

event-handler

certificate

how to implement both mouse down and click events for button ?

1 Oct 2012 by Sergey Alexandrovich Kryukov

Actually, MouseDown and Click events do not interfere. As you could notice, the click event is invoked after the MouseUp event, so MouseDown and Click are totally isolated. You handle them in a usual way.Just for your understanding: your button1_Click or button1_MouseDown are not events, but...

CPU Usage 100% when creating 3 threads and using WSAWaitForMultipleEvents() and WSAEnumNetworkEvents()

7 May 2013 by KarstenK

i guess your threads are blocking the network api.why arent you making some outout or use your debugger...

CPU Usage 100% when creating 3 threads and using WSAWaitForMultipleEvents() and WSAEnumNetworkEvents()

7 May 2013 by Jochen Arndt

Did you report errors and terminate the thread when a function call fails?There is at least one wrong call that should result in an error return (best case) or undefined behaviour (worst case):WSAWaitForMultipleEvents(2, &hEvent, FALSE, WSA_INFINITE, FALSE);You are passing 2 for the...

Why does lines disappear on maximizing/minimizing applet?

2 Jun 2013 by AlphaDeltaTheta

When you minimize and maximize your applet (in applet viewer or webbrowser), a fresh call to update is made after clearing the entire screen. So in update, you only paint the last line... therefore all your lines disappear. Think of some alternate mechanism such as storing all lines in a stack...

Java

AWT

event-handler

Fire Insert and Update Stored procedure from One Button Click

30 Jul 2013 by Kunal Ved

Hello friends , I have got an Asp.net form , in that I have Submit button that inserts the textbox data to the data base and binds the gridview . In the grid view I have a link button that fills the text box for the selected row of that gridview. Now on the same submit button I want to fire...

ASP.NET

stored-procedure

event-handler

Event Handling VB.net

21 Sep 2013 by phil.o

Technically, you are supposed to expose us a problem and ask for a formal question.Anyway, your textMouseDown method has an invalid signature if you want to use it as an eventhandler for MouseDown event:Private Sub TextMouseDown(sender As Object, e As MouseEventArgs) Dim myLabel As...

event

event-handler

Handling

Event Handling VB.net

21 Sep 2013 by Fredrik Bornander

You need to change the signature of your textMouseDown method to match that of the event you're wiring up.Something like this might work for you; Dim textControl() As Label 'Array of label objects Dim txtcnt As Integer Public Sub addTextControl() txtcnt = txtcnt +...

event

event-handler

Handling

(OS: win7, IDE VS2010) handle windows-CLOSE event in c++ win32 console app?

1 May 2014 by Richard MacCutchan

I already explained the issue in your previous question at forrtl: error (200): program aborting due to window-CLOSE event[^]. You cannot capture Windows events/messages in a console program.

Simple programming question C++

29 Mar 2015 by Fredrik Bornander

It's a little bit difficult understanding exactly what you want, but I think it's something like this;When button 1 is pressed, store some value in a variable, somewhere.When button 2 is pressed, use the value stored by pressing button 1, somehow.If that's the case something like...

C++/CLI

.NET

event-handler

Raise a selectedvaluechanged event

22 May 2016 by OriginalGriff

The ToolStripComboBox doesn't have a SelectedValue changed - it only has the SelectedIndexChanged event.ToolStripComboBox Events (System.Windows.Forms)[^]Even if it did, the first click would raise it in the same way that it raises an index change.To avoid the "first call" if it's a...

event-handler

combobox

Visual studio 2013 CE crashes due to addhandler code

7 Dec 2017 by Shaynec

Hi, I've run into an issue that has me scratching my head and I'm hoping somebody has experienced a similar issue... I have a user control that has a custom event handler. When adding a handle to this event from a separate winforms project, visual studio crashes with the below exception, ...

Visual-Studio

EventArgs

event-handler

Unsubscribing from an event still it's getting fired many times, how to stop it?

5 Jun 2018 by OriginalGriff

Please, look at your code! Why would you write this: SerialPort port = new SerialPort(); ... if (port.IsOpen) { port.Close(); port.Dispose(); } port.Open(); If it's a new port, it can't be...

event-handler

delegates

Invoking event handler in another thread dot net core

25 Feb 2019 by Maciej Los

Please, read this: The Updated .NET Core Event Pattern | Microsoft Docs[^]

event-handler

Trouble with parent page subscribing to nested child control eventhandler

22 Jan 2020 by Richard Deeming

ItemDataBound is only fired when the item is being bound to the data source. That only happens on the initial load; when you click the button to post back to the server, the control tree is recreated without databinding, so the event won't fire. ItemCreated would be the event to use to wire up...

event-handler

Click event handlering from form to usercontrol

10 Aug 2021 by BillWoodruff

Please ask yourself if you intend to write code only you will understand: if the answer is "no," read on. If you want to get a job as a programmer in the future, please read on. A UserControl is a ContainerControl; so is a FlowLayoutPanel. You...

WinForms

event-handler

user-controls

What is the best or better implementation (using event handler) for this situation?

30 Aug 2021 by Richard Deeming

For something like this, the "best" approach is probably to use event delegation: https://javascript.info/event-delegation[^] document.querySelector('.fruits').addEventListener("click", function(event){ const target =...

How to select a specific cell in datagridview when row is selected

14 Jun 2016 by Member 11597857

I thought this would be simple, but I've gone in circles.When the user selects any row in a datagridview I want to switch the selection to the first column. A SelectionMode of either FullRowSelect or CellSelect would be fine (I've tried both).What I have tried:I've tried triggering...

event-handler

DataGridView

Cannot open log for source. You may not have write access.

5 Nov 2012 by jeyamothi

Hi, Frequently receive the following error in my application "Cannot open log for source 'xxx'. You may not have write access." This is in Windows 2008R2.Kindly help me.thanks in advance.

ASP.NET

event-handler

Cannot open log for source. You may not have write access.

5 Nov 2012 by manognya kota

Hi,Following the below steps must help youhttp://mossipqueen.wordpress.com/2008/08/04/cannot-open-log-for-source-you-may-not-have-write-access/[^]

ASP.NET

event-handler

How to Handle Pop_Up Window "X" button ?

4 Dec 2012 by Samsi Y

Hi All, Very Good Morning..I got a small problem when handling the Unbeforeload.My Problem: Based on Some count i need to show a pop-up window and if the count equals, I need to cancel the pop-Up.Can i handle "X" button in Pop_Up window. If the user clicks on it, is it possible to...

How to Handle Pop_Up Window "X" button ?

5 Dec 2012 by VishwaKL

http://mattberseth.com/blog/20...

How to add hover or MouseEnter Event for a button in ASP.NET?

12 Feb 2013 by Janani Muthaiyan

How to define hover/ MouseEnter Event for Asp button? I dont wanna use Jquery.. I want to write event in the code behind the asp.. Example:protected void Page_Load(object sender, EventArgs e) { PanelID.Visible = false; }protected void...

ASP

event-handler

event

How to add hover or MouseEnter Event for a button in ASP.NET?

12 Feb 2013 by Anurag Sinha V

Hi,You might wana check the below link.http://social.msdn.microsoft.com/forums/en-US/winforms/thread/aa431c76-df11-4d72-9255-191b28dce9a3[^]Hope it helps.regardsanurag

ASP

event-handler

event

Java EventHandling Error

16 Mar 2013 by Mujahid Islam

I have a problem to compiling this code im new to java and did'nt understand waht is problem please help me code is attached.import javax.swing.*;import java.awt.*;import java.awt.event.*;public class Cal implements ActionListener{JFrame frm;Container c;JLabel...

Java

event-handler

Java EventHandling Error

16 Mar 2013 by H.Brydon

You have public void actionPerformed(ActionEvent e) defined twice, with 2 different implementations.[ha ha] No, actually you have defined it 3 times.

Java

event-handler

Drag and Drop Icons From a wxListctrl to a wxPanel

10 Apr 2013 by vasantha kumar S

I want to have a image below a cursor when I drag and drop icons from a wxListctrl to a wxPanel.But when I try doing it i am not getting the image.Please help me out.Thank you.wxImageList* n1=ListCtrl1->GetImageList(wxIMAGE_LIST_SMALL);wxBitmapDataObject...

how to display the label name of the control when you hover the mouse over it in an window?

10 Apr 2013 by vasantha kumar S

I am Developing a windows application. IDE: CODEBLOCKSIn codeblocks there is no "mouseover event" to capture the mouse event.please help me out.Thank you

how to display the label name of the control when you hover the mouse over it in an window?

10 Apr 2013 by CPallini

Quote:In codeblocks there is no "mouseover event"Sure, but Windows API do provide the functionality. Just have a look at the documentation[^].

How to send console output to a log file using events?

20 Apr 2013 by anju_g

Hi,I am using delegates and event handlers. public delegate void StringReadEventHandler(string text); // Event to notify of a string read from stdout stream public event StringReadEventHandler StdoutTextRead; // Event to notify of a string read from stderr...

logging

event-handler

event

How to send console output to a log file using events?

20 Apr 2013 by Richard MacCutchan

Use a TextWriter[^].

logging

event-handler

event

How network event FD_WRITE is generated when using Event Driven Sockets.

9 May 2013 by ayesha hassan

I am working on newtwork event based socket application. When client has sent some data and there is something to be read on the socket, FD_READ network event is generated.Now according to my understanding, when server wants to write over the socket, there must be an event generated i.e....

How network event FD_WRITE is generated when using Event Driven Sockets.

10 May 2013 by Richard MacCutchan

See http://msdn.microsoft.com/en-us/library/windows/desktop/ms741540(v=vs.85).aspx[^] for a complete description of how these events are generated and consumed.

Why does lines disappear on maximizing/minimizing applet?

26 May 2013 by AG007

public class xy extends Applet implements MouseListener,ActionListener{ Button b; int x1, y1,x2,y2; public void init() { b=new Button("Draw Line"); add(b); x1=y1=x2=y2=0; b.addActionListener(this); } public void actionPerformed(ActionEvent...

Java

AWT

event-handler

handling event of dynamically created checkbox

28 May 2013 by PleaseHelpCP

Hi,I am creating checkboxes dynamically. I want to handle its CheckedChanged eventCheckBox cb = new CheckBox();cb.ID = dvw["Val"].ToString();cb.Text = dvw["Txt"].ToString();cb.AutoPostBack = true;cb.CheckedChanged += new EventHandler(cb_CheckedChanged)How to pass...

event-handler

checkbox

handling event of dynamically created checkbox

29 May 2013 by Maciej Los

have a look here: CheckBox.CheckedChanged Event[^]. There you'll find an example.

event-handler

checkbox

handling event of dynamically created checkbox

29 May 2013 by Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

No, you can't add an extra parameter to an existing event handler.Find some other way to do what you want to achieve.Refer - Delegates and Events[^] to explore more.

event-handler

checkbox

The TransitionCompletedEvent is not being raised

1 Jun 2013 by Ivel97

I'm using this library for transitions: https://code.google.com/p/dot-net-transitions/I'm trying to handle this event: https://code.google.com/p/dot-net-transitions/wiki/CodingWithTransitions#Using_the_TransitionCompletedEventIt says its raised by the background transition thread when...

event

event-handler

DLL

Listening to all specified events of a from

14 Jun 2013 by Michelle Phoenix

Hello,I am building a form which has various controls on it, and each control has various methods that are handled, such as onLoad, Click etc. When certain methods are fired, I need to write a log entry that that specific control's _something method was fired.However, instead of adding...

delegates

event-handler

forms

Listening to all specified events of a from

14 Jun 2013 by Mehdi Gholam

Read the following :http://msdn.microsoft.com/en-us/library/ms228976.aspx[^]http://msdn.microsoft.com/en-us/library/system.reflection.eventinfo.addeventhandler.aspx[^]

delegates

event-handler

forms

Button Event to occur when I press a Keyboard key

26 Jul 2013 by Sushil Mate

You have form? Create the KeyDown[^] Event. From http://stackoverflow.com/a/3334956[^]public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { this.BringToFront(); this.Focus(); ...

Fire Insert and Update Stored procedure from One Button Click

30 Jul 2013 by Dheeraj_Gupta

As i am understanding your question. you want to use same submit button for both tasks insert and update. For this you need to have an hidden field which will say that what operation you are now going to perform by clicking on submit button. like in hidden field you can provide the row no or...

ASP.NET

stored-procedure

event-handler

Fire Insert and Update Stored procedure from One Button Click

30 Jul 2013 by Sampath Lokuge

You may try like below :1. When you insert a text box value for the first time, you don't have any primary key associated with that transaction.So you can go for insert SP.2. But When you update the record,you can easily check that record's primary key vale and If it's there then you can...

ASP.NET

stored-procedure

event-handler

asp.net button event not firing

10 Aug 2013 by danar_kalari

I have a problem. While I am adding an event handler from code behind to a button the event never gets fired. But when I add it from when creating the button tag it works perfectly and I am creating the button from code behind and I adding it to table. ...

asp.net button event not firing

10 Aug 2013 by Srinivas Kalabarigi

Take backup of your button event code... delete the button from design mode... add new button and double click it and paste the code... This will fix the issue...

create Button dynamically and also Click Event !

13 Sep 2013 by Code Mirror

I am creating a win form application in which i need to make button at run-timethis is code how i am doing Button button1= new Button(); panel1.Controls.Add(button1); button1.Location=new Point(220,457);button1.Name="btnnextimage11";button1.Size=new...

WinForms

event-handler

create Button dynamically and also Click Event !

13 Sep 2013 by Code Mirror

Thanks a lot to helping hands :)I am posting my final code to create a Button dynamically and related stuff too{Button button1= new Button();button1.Location=new Point(220,457);button1.Name="button1";button1.Size=new Size(118, 39);button1.Text = "Click This button...

WinForms

event-handler

Prevent pressing of a key in a textbox

20 Sep 2013 by Divakar Raj M

I have a WebDateChooser textbox which automatically fills up with the current date when the page loads. I can edit this textbox and enter a custom value date. My problem is that after entering a custom date, if i press Enter key and then click outside the textbox, it reverts back to the default...

Prevent pressing of a key in a textbox

20 Sep 2013 by V.Lorz

Sergey's solution is what you need in this case, but take also a look at this JQuery plugin here http://code.google.com/p/jquery-ui-plugins/wiki/TextInput[^] as it could be usefull for future references.If you need more details on keypresses processing, this link has also some more...

Object receiver event looping on itself

4 Nov 2013 by OriginalGriff

Probably, you don't want to add a new handler each time the user presses the button, as you appear to be doing now.You do realize that "+=" for an event adds a handler to the chain? And that if you have the same handler in the chain 8 times, it will get called eight times every time the...

Visual-Studio

event-handler

handler

Can a usercontrol containing a button call itself on click event?

4 Nov 2013 by Ananya Malik

hiI have created a user control containing a button. I want to know if I can call this user control on button click in the user control? if yes, how?thanks,Ananya

WinForms

event-handler

Can a usercontrol containing a button call itself on click event?

4 Nov 2013 by OriginalGriff

That's not exactly clear, but I'll try and explain the various possibilities for what you mean:You can click the Button in the UserControl and raise an event in the UserControl which refers to the button: just add an event handler in the usual way and the sender parameter will contain the...

WinForms

event-handler

Can a usercontrol containing a button call itself on click event?

4 Nov 2013 by Bhuvanesh Mohankumar

Hi,I am not clear about the requirements.As per my understanding, you have a User Control and you have a Button in that control.You need to Fire an event when the button is clicked inside the user control.The Fired event should do some task with your Code Behind at the same time,...

WinForms

event-handler

How do I handle a DDL SelectedIndexChanged in GridView itemtemplate within a class library

29 Jan 2014 by Purple Ellie

Due to the way our CMS works all bespoke pages have to be in a compiled class library (VB.NET). I need to be able to update a datatable in a Session based on the selected value of a dropdown list in a GridView.Either my SelectedIndexChanged event handler is not firing, or there is a problem...

DropDownList

event-handler

Adding a Click event handler function to a C# Video - Windows Forms

25 Feb 2014 by Member 10334528

Hi, I am currently working on a C# Windows Forms Application within Visual Studio Express 2012.I have a video, which has it's parent set to a Panel the exact same size as the video (Basically a container for the video). What I am after is the video to have a click event handler so a certain...

Adding a Click event handler function to a C# Video - Windows Forms

25 Feb 2014 by Krunal Rohit

I would suggest you to look at ContextMenuStrip[^], which represents a shortcut menu for the any control associated with it.And how to do that, that is pretty simple. You should play around with the property of the control after adding context menu in your application. But still, look at...

How Can I Call Eventhandler

12 Mar 2014 by Ashwani Gusain

if a have an eventHandlar shall i call it from If conditionif (instance.NavigateError += new SHDocVw.DWebBrowserEvents2_NavigateErrorEventHandler(instance_NavigateError))but its not working, actually i need to get response whether its calling or not?please help if u have any other...

C#4.0

event-handler

How Can I Call Eventhandler

11 Mar 2014 by OriginalGriff

No, you don't do that.There is no point in testing the value of a event handler addition: it will never be false because it does not return a bool value. It doesn't return any value! So all you will get is a compiler error about not being able to convert a void to a bool...And you don't...

C#4.0

event-handler

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; ...

How Can I Restrict Passing Enter Key Event From Child To Parent In C#

6 Apr 2014 by george4986

i have an invoice form with a grid for items,loaded from a child form on key press.keypress code in parent: protected override bool ProcessCmdKey(ref Message msg, Keys keyData) { if (keyData == (Keys.F11)) { childform obj = new childform...

How Can I Restrict Passing Enter Key Event From Child To Parent In C#

7 Apr 2014 by george4986

I have added following code in child forms onload event and now its working//////////fnd_item , is the search control fnd_item.SmartTab = false;

How to Create an New event in Ocx Control programatically

16 Apr 2014 by Sergey Alexandrovich Kryukov

Usually "create… programmatically" means that your code creates something during runtime, otherwise "create an event" would mean "create a new (or updated) code with added event member". Event is a member of some control type (or any other type), you cannot add it "programmatically". Just...

question capturing raw audio data and do FFT. Please help

7 Jun 2014 by Member 10528344

I am using NAudio library to capture the audio signal and do the FFT.It sort of working. It can captured audio and do the frequency analysis. but what I want is :playing a tune for 5 seconds, during a second, capture raw data and do FFT. and then check fundamental frequency. and repeat...

event-handler

threads

Fire a Action Event in UserControl inside a DataGridView

9 Jun 2014 by Krishnananthan Vijayaretnam

I've added an user control inside a datagridview row using a Custom Cell. Then I tried to pass a button click from the user control to get the value of the clicked button. This is what I tried. private void InsertRow(Vdine.PosApp.UI.Models.OrderModule.OrderManagementModel...

event-handler

event

Custom Control Event not firing inside a user control

13 Jun 2014 by C#Programmer2012

I implement a custom control that handle post back event:namespace CalendarControls{ [System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name = "FullTrust")] public class CalendarPostback : WebControl, IPostBackEventHandler { ...

Problem on event handler on a button in webform in asp.net

16 Jun 2014 by Muhammad Taqi Hassan Bukhari

I have made a web form on asp.net, and a submit button. When first time i open the form and fill data and click on submit form. the data goes into database successfully.Then after i have write code to refresh the page, after refreshing when i fill the form and now click on submit button,...

WebForms

ASP.NET

event-handler

How do I raise an event for a custom text field?

21 Jul 2014 by Member 7894058

Hi,In my VB.Net form, I'm trying to create an event (leave event)for a custom text field. I'll have to raise the event when the focus is leaving the textbox. It displays in the event list but doesnot fire when I want to, like leaving the textfield. Please help me with this.My custom...

event-handler

event

How do I raise an event for a custom text field?

21 Jul 2014 by kasbaba

Is this a custom control you are using?If you have the control source, you can look up the RaiseEvent handler and see if it points correctly to the TextBoxControl_Leave event.If nothing works - you can always use the Enter property of other controls to accomplish what you are trying to...

event-handler

event

Communicating between Orchard CMS modules

15 Sep 2014 by Confucius II

Hi, I'm a newbie to Orchard CMS. My problem is that I have created a couple of custom modules on my Orchard site, but am so far unable to raise events and communicate between these modules.From what I’ve read, the EventBus Pattern and IEventHandler is the best way to go about this, but am...

event-handler

How to continuously add objects to array list with button(actionListener) ?

15 Feb 2020 by jchacon28

I finally managed to get my GUI setup, and the listeners registered. I have a Student class, a StudentDemo class, and a StudentInfoWindow. In the StudentInfoWindow class i have a addButton, when i click it, it grabs the info from the text fields, creates a student object, adds it to an array...

How to write an event handler to automatically detect new activesync connections.

22 Oct 2014 by Spidy1

Hi. I have a windows form program that updates info when an existing activesync connection is active.I'd like to write an event handler that will automatically update the form when a new Mobile 6.5 device is cradled.Does anyone have a complete example of this?All the code snippets...

event-handler

How to write an event handler to automatically detect new activesync connections.

23 Oct 2014 by Spidy1

I solved the crossthreadmessagingexception by using a delegate.private void m_rapi_RAPIDisconnected() { Invoke((new updateFormDelegate(updateForm))); } private delegate void updateFormDelegate(); void...

event-handler

Dynamic Controls Event Handling

8 Jan 2015 by Ali Albasri

Greetings to you allI have this table in asp.net and i`m creating dynamic rows for certain data of specific user, and I`m creating dynamic buttons for each row.I want to store each ID the of each row of the data in the button ID property of the button (because there is no tag property)...

ASP.NET

event-handler

Parameter

mouse position (Cursor.Position)

15 Feb 2015 by Sergey Alexandrovich Kryukov

Such problems are solved very simply: get rid of PictureBox in all cases except simple presentation of a static picture. Such a simple task as setting a pixel is already the beyond the area when this control is useful. In all other cases, it only presents extra hassles, not giving anything in...

mouse

event-handler

image

C# - Set ListBox.Items on Parent Form to Child Form using an eventListener maybe?

23 Feb 2015 by Sergey Alexandrovich Kryukov

I don't think your forms are really child and parent. Without setting Forms.TopLevel to false (don't do it!), you would get an exception at attempt to set any form's Parent.It looks like a popular question about form collaboration. The most robust solution is implementation of an appropriate...

event-handler

C# - Set ListBox.Items on Parent Form to Child Form using an eventListener maybe?

22 Mar 2015 by Sergey Alexandrovich Kryukov

As the question turned out to be very popular, and my previous answers often were not well understood, probably were not clear enough, I decided to write a Tips/Trick article complete with detailed code samples and explanations: Many Questions Answered at Once — Collaboration between Windows...

event-handler

Get relative position after GetCursorPos in C++/CLI?

29 Mar 2015 by Sergey Alexandrovich Kryukov

There is nothing more wrong that this cast. System.Windows.Forms (too bad you did not indicate what UI library you are using) windowed control wrap HWND; it cannot be a reference in principle, HWND is a native (unmanaged) code handle. In this library, HWND is of course...

Manual DataTable Event Handler doesn't work

18 May 2015 by hosamdahb

Hello,i make an event handler to call a function when row changed, it seems i did something wrong or still missing and i copied the relative code only to not interrupt you, so please help me.DataTable TableX= new DataTable();// do required code to fill the data table and already...

event-handler

DataTable

Manual DataTable Event Handler doesn't work

19 May 2015 by hosamdahb

the issue fixed when i moved the adding of event handler each time before filling the data table inside the DataTable fill instead of putting it once in the form load, i don't know why but this is the case!!

event-handler

DataTable

how to get events of managed Dll in native VC++ code?

13 Jun 2015 by Zon-cpp

Hi,I have a problem to use a managed dll (is built by C#) in a native VC++ code.I can't fire the events of that dll in my VC++!I Registered that dll and import it in VC++ by:#import "..\..\EventDll.tlb" raw_interfaces_onlyand I call other functions of that dll...

Handle Events of a Dll In VC++ Project

26 Aug 2015 by Zon-cpp

Hi, I want to use a dll in my VC++ project. The Dll, have some functions and some events. how do i handle events of dll in my project?name of event is: TestEvent(int i , string msg) when i call test() function of Dll, the event will be called.The Dll is written by C# whit this...

VisualC++

event-handler

DLL

How do I detect insertion of USB devices category wise in C# winform?

8 Sep 2015 by Ajith.Kerala

USB thumb drives USB harddisks USB DVD writer USB Bluetooth devices USB headsets usb mouse USB keyboard USB webcams / camerasJust want to detect any sort of usb device using event handler...Would appreciate any help... WqlEventQuery...

WinForms

event-handler

USB

Events and multithreading for a time critical application

22 Feb 2016 by Member 12112067

I have an application which works on a 10 ms cycle (every 10 ms all the functions are run so it almost behave like an embedded controller). There is a function in my code which is more expensive (in terms of execution time) than I want. This function is called sendECSResponce (This send a string...

C#4.0

event-handler

multi-threading

Events and multithreading for a time critical application

22 Feb 2016 by Philippe Mori

It is hard to make sense of that code...You raise the event in SomethingHappened but that method is not called anywhere.It look like you are trying to explicitly call EventThrower constructor method (just after the comment sending message). I'm surprise that this code would even...

C#4.0

event-handler

multi-threading

What happens when a thread with active event handler exits ?

29 Mar 2016 by George Swan

I feel that using the relatively new async feature of C# is the best way to implement asynchronous methods because it provides an exit point for the method when it completes. You can use it like this //subscribe to the event button.Click += MyEventHandlerAsync; // When the event fires...

.NET

event-handler

threads

How can I use events properly in multi-thread or WCF service-based applications?

24 Apr 2016 by hamidsos

I have device that provides some real-time events, the manufacturer give me a dll for use that events and develop programs based on that device.here is some of properties and events of that dll: [ClassInterface(0)] [ComSourceInterfaces("zkemkeeper._IZKEMEvents")] ...

WCF

multi-binding

event-handler

Raise a selectedvaluechanged event

22 May 2016 by Trader999

Sorry if this is a simple question, but how do I raise a SelectedValueChanged event on a toolstrip combobox? In the combobox properties I can see a list of events, but not the SelectedValueChanged event.I need to trigger some code when a user changes the selected item, not when the combobox...

event-handler

combobox