raiseevent

Event not Firing in MS Access VBA

由 本小妞迷上赌 提交于 2020-01-11 13:05:23
问题 I have a form in MS Access which has an image. The image has an Click event which opens a modal form. The modal form has an OK and Cancel button. When you click the OK button, an event is supposed to fire which tells the main form which button was clicked. (This is to simulate the DialogResult functionality in C#). However, the code in the event handler never runs. The modal form has the following in the general declarations: Public Event OnDialogBoxClose(NewRecordID As Long, DialogResult As

Event not Firing in MS Access VBA

由 谁说胖子不能爱 提交于 2020-01-11 13:05:08
问题 I have a form in MS Access which has an image. The image has an Click event which opens a modal form. The modal form has an OK and Cancel button. When you click the OK button, an event is supposed to fire which tells the main form which button was clicked. (This is to simulate the DialogResult functionality in C#). However, the code in the event handler never runs. The modal form has the following in the general declarations: Public Event OnDialogBoxClose(NewRecordID As Long, DialogResult As

How to check for subscribers before raising an event in VB.NET

由 心不动则不痛 提交于 2020-01-03 08:44:29
问题 In C#, you do something like this: if (Changed != null) Changed(this, EventArgs.Empty); But what do you do in VB.NET? There is RaiseEvent , but is RaiseEvent Changed(Me, EventArgs.Empty) actually checking that something has subscribed to the event? 回答1: Unlike its C# equivalent, RaiseEvent in VB.NET will not raise an exception if there are no listeners, so it is not strictly necessary to perform the null check first. But if you want to do so anyway, there is a syntax for it. You just need to

Firing MouseLeftButtonDown event programmatically

由 爱⌒轻易说出口 提交于 2020-01-03 08:29:14
问题 I'm trying to manually fire a MouseLeftButtonDown event on a WPF control programmatically, as I am using the Microsoft Surface SDK, which does not fire MouseLeftButtonDown events, but ContactDown events. Basically I'm trying to push the MouseLeftButtonDown event down to the control, to fire off the correct behavior on the control, while handling a ContactDown event. I'm guessing I have to somehow use the RaiseEvent method on the control to do this with MouseButtonEventArgs, but I'm having

Raising Custom Class Events In Windows Service C#

由 你说的曾经没有我的故事 提交于 2019-12-19 04:09:14
问题 I did write a windows service that can connect to a network device using a dll. so everything works fine, but The event handler does not work in win service! here is my code : My Custom Class Code : using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace MyNewService { public class zkemkeeperHandler { public event EventHandler OnFinger; public event EventHandler<VerifyEventArgs> OnVerify; private System.Diagnostics.EventLog eventLog1 = new System

How can I RaiseEvent in VB.net

由 喜欢而已 提交于 2019-12-12 02:18:48
问题 I have 2 project in my Solution. Lets say Proj A and Proj B. Proj A is having my custom event. and same Proj is Raising that event using RaiseEvent Function of Vb.net And Proj B is having reference of Proj A. Proj B is adding handler for Proj A's custom event. but my custom event cant raise. Could any one can explain me how can I do that.? Edit: Proj A Public Shared Event cardReadComplete(ByVal data As String) Public Sub kbHook_KeyDown(ByVal Key As Windows.Forms.Keys) IO.File.AppendAllText("E

WPF Event raised by UI or from code?

由 血红的双手。 提交于 2019-12-12 02:17:45
问题 how can I find if an event is raised by UI or by code? I need to recognaize if Value of a slider is changed by the user from UI or has a new value from the executed code? Thanks! 回答1: I'm assuming that you've got your Slider hooked up to a two-way binding where the current value of the slider could thus be determined either by the user dragging the slider Thumb or by the bound class's code changing the value of the property that the slider is bound to. If this is true, then I think an

RaiseEvent from a UserControl that's placed on a UserControl that's on a Form

由 坚强是说给别人听的谎言 提交于 2019-12-12 01:03:43
问题 I have a Windows Form that contains a custom control container as a UserControl. For the sake of this question, this custom control container is called Dashboard. This container called Dashboard contains numerous other controls depending on their permissions. I need to raise events that are contained on these controls through the Dashboard control and over to the Windows Form. How can I bubble up the event? I'm using VB.NET for this project, but can convert C# into VB.NET. Also, to complicate

c# event handler is called multiple times when event is raised once

由 风流意气都作罢 提交于 2019-12-04 00:52:18
问题 Below is my code, first is where I raise the event and second section is where I consume it in another class. It seems pretty straight forward, but the logs are showing that even though the event is raised once, the event is firing 20+ times on the class that consumes this event. Any ideas? IBSerialPort class: public delegate void PacketReceivedHandler(object sender, PacketReceivedEventArgs e); public event PacketReceivedHandler OnPacketReceived; public class PacketReceivedEventArgs :

c# event handler is called multiple times when event is raised once

由 穿精又带淫゛_ 提交于 2019-12-01 03:46:39
Below is my code, first is where I raise the event and second section is where I consume it in another class. It seems pretty straight forward, but the logs are showing that even though the event is raised once, the event is firing 20+ times on the class that consumes this event. Any ideas? IBSerialPort class: public delegate void PacketReceivedHandler(object sender, PacketReceivedEventArgs e); public event PacketReceivedHandler OnPacketReceived; public class PacketReceivedEventArgs : EventArgs { public Packet PacketReceived { get; private set; } public PacketReceivedEventArgs(Packet packet) {
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