How To Create Custom Events
Feb 11, 2011Is it possible to create my own event in vb.net .
I need an event for WindowState = Normal.
Is it possible to create my own event in vb.net .
I need an event for WindowState = Normal.
I have created a control in vb.net. Now I want that control to send some message(fire an event called recieve) and the parent application that implements it will have to create an even listener called recieve and do actions accordingly.
View 3 Repliesi just creates a new custom filters toolbar and compile into a dll to be used on my projects but now i face a problem
the controls inside my toolbar used t create a filter (combos and text boxes) has the event for when text change but this event does not pass through my dll to be used on my projetc so i have no way of knowing when the user change a value on the filter, how can i pass this event?
Declare Custom Events To Avoid Blocking, with more than one custom event. If I duplicate the Public Custom Event section and just change the event's name, then both events are called even if my code only calls one of them.
Public Class TestClass
Private EventHandlerList As New ArrayList
Private EventHandlerIndex As New ArrayList
[code]....
How to create custom events for contol. i have created a user control mytextbox & i am showing some properties of textbox & now i want to expose user control events
I am showing Following properties to user
CODE:
How to expose Events
I extended treeview, treenode, and nodetype so I could have custom nodes. Certain nodes have image buttons on them allowing them to add a child node or delete the node. I can't handle any of the events from my buttons.Public Class ContentTreeView Inherits TreeView Public Event OnAddChild(ByVal sender As Object, ByVal e As EventArgs) Public Event OnDelete(ByVal sender As Object, ByVal e As EventArgs)
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What is the proper design pattern for custom events in .NET (VB or C#).
I am refering to custom events, where in you override the AddHandler, RemoveHander, and RaiseEvent methods.
I am working on a project that has some events already created and working. One of these events is called SelectedIndexChanged Event. I am using it for one of my Subs in my frmNewInspection Class, and I am trying to use it for a second Sub and it says that "Event SelectedIndexChanged Cannot Be Found".
The event is created here in a class called LabelComoBox
Private Sub tctlInspection_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles tctlInspection.SelectedIndexChanged
'MsgBox("Index: " & tctlInspection.SelectedIndex.ToString)
[Code] .....
How to implement my own events I'm not sure why do I use them. I mean instead of rising event you could simply call functions right? This is as close as I got to a good reason:
1) If you call a function that does one thing and then based on result it needs to do something else it may be a good idea to do that something else in event function that is raised when that first thing was done. This way you avoid creating long functions and can make system more intuitive.
2) If object1 is inside object2 (a variable) and object2 has function DoThis and in that function affect something in object2's parent class it's better to use event in object1 rather than mess with parent (object1) inside object2.
This is what I would like to achieve:To create a custom messagebox, with varying number of buttons with custom .Text descriptions, and other features. I intended to have a property array that would be redim-ed and have values (.Text values) set by the calling class:
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how to specify a custom icon for display in the toolbox window when you create your own custom control? Something other than the dreaded "gearbox" icon.
View 2 RepliesI'm trying to create a user control that will provide a draggable splitter between two panels — exactly like SplitContainer — in a custom IDesignerHost implementation. SplitContainer itself, as far as I can tell, is not an option; it will raise an exception unless used in Visual Studio's Designer.
My implementation would look roughly like this, except that I'm not receiving the necessary mouse events. I've tried event handlers, On* overrides and overriding WndProc in the user control itself, the host control, and the parent form, but I don't appear to receive WM_MOUSEMOVE, WM_LBUTTONDOWN or WM_LBUTTONUP events anywhere. Per this bug report, I should be receiving WM_MOUSEMOVE in "the control designer"; I'm not sure what that refers to in this case.
how I can implement a draggable splitter?
I'm trying to create a user control that will provide a draggable splitter between two panels — exactly like SplitContainer — in a custom IDesignerHost implementation. SplitContainer itself, as far as I can tell, is not an option; it will raise an exception unless used in Visual Studio's Designer. My implementation would look roughly like this, except that I'm not receiving the necessary mouse events. I've tried event handlers, On* overrides and overriding WndProc in the user control itself, the host control, and the parent form, but I don't appear to receive WM_MOUSEMOVE, WM_LBUTTONDOWN or WM_LBUTTONUP events anywhere. Per this bug report, I should be receiving WM_MOUSEMOVE in "the control designer";
View 4 RepliesI have created a base class for some user controls, then I created controls that inherit this class. This is so I can CTYPE the inherited controls back to the base class and refer to properties, methods and events in a common interface. The base class declares has some Public Event BLAH(Sender as object, e as EventArgs) declarations. The derived class then has Public Shadows Event BLAH(Sender as object, e as eventargs) declarations. My parent form adds handlers for the BLAH event. When the derived class fires the event, though, it does not get raised to the parent form.
View 1 Repliesknow how to create a custom file association ( a custom extension ) in VB .Net and how to open it on the application
View 1 RepliesI want to add a custom property to a button in window form. Currently i am using following code to create my logic. but i want to create an enum value for a button control.
btnPartyDetails.Text = "View";
{}
btnPartyDetails.Text = "Add";
{}
[Code]...
I want to do something like this, where ActionType will be my enum.
I also want to create custom event based on the value set. How can i do this ?
With VB.net, I'm coding a simple application to get more used to the new .Net format.
I'd like to save all the information to a 'new' database file. how to create a database on the fly, once that is done i'll be able to connect to it no problem, but actually creating the file is proving difficult to work/find out.
Also, with vb.net and the newly created custom file, how can it be made to automatically open that information with the program?
Is there a method in installation to associate the file type with the new program? How can i check when the program loads if a database file has been 'double-clicked' (rather than just running from the .exe of the program) and proceed to load the data?
EDIT1 - Extra InfoThe windows application has many different fields and content etc, then i need to save that to a file that could later be loaded by 'double clicking'. I assumed the easiest way would be to create a mini-database for each unique file
Problem that you may have when dealing with two objects that are raising some events. Here, to make it obvious, I am closing the form, but the problem can be experienced with any other 2 classes event. First, what is the problem !
Let suppose that by pressing a button, you want to raise a custom event, then execute a method and then close the form
In that case, you may use a code similar to this
Event BeepIt()
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
RaiseEvent BeepIt()
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i want to know how i can create events for IE. i use with this code:
Imports mshtml
Imports SHDocVw
Dim myDoc As mshtml.HTMLDocument
[Code].....
I am not a new coder, but i am not a know-it-all. I have been watching some of those NVidia fluid videos, and got jealous. I thought "Why can't i do it?" I'm not good enough for OpenGL or some other 3d engine, but i thought i would try it in 2d.
View 4 Replieshow to create custom events. If anyone can give me some simple sample code and/or refences,
View 5 RepliesI have a form with a textbox to enter a number and a button called "Create". When a user enters a number and clicks create the form gets populated with the number of buttons entered in the textbox and the title of the buttons are labeled by consecutive numbers. For example if you enter 5 the form will populate with 5 buttons labeled button1, button2, ...button5. When you click on these newly created buttons a messagebox will popup stating the buttons name. Basically I need to know how to create events and populate them with code I guess dynamically.
View 1 Repliesis it possible to create a class which has the majority of your keypress controls? Like allowing just letters or numbers in a textbox etc. To make things clearer what i exactly want. I have a textbox on my form. This is a textbox for the postcode. The postcode is supposed be something along the lines of AA 1234. This will be checked on lostfocus.
View 6 RepliesHow can I create webbrowser mouse events (mousedown, mouseup, mousemove)?
View 2 RepliesI want to create a custom class that has inside an array of another custom class (see my code below) but when the programm runs is crashes. Why? What is the right expression???? Plz help I'm a newbie in VB.net.....
Public Class ctrarray
Public nameclass As String
Public ctrlindex(glvar_spaces) As ctrlindexclass
End Class
[code]....
I need two seperate lists, which every item is Integer, String, Bitmap - and one which every item is Integer, String String. However I don't know how to do this, or even where to look - I've googled for custom objects and custom object lists. What I'm trying to do is this.Custom Object1 is Integer, String, Bitmap Custom Object2 is Integer, String, String
In one thread I'll be adding items to List1(Of Object1), and processing them, and adding the results to List2(Of Object2), however I need to be able from other threads to look at the list and say only give me the items where Integer = (my thread ID), is this possible? Any help, or even links to information that would be relevant to this request would be helpful?
I have a program that I would like to create application-level MouseEnter and MouseLeave events for. Basically I have an app that I'd like to leave open that would be very opaque when not in use, and when the user moves the mouse anywhere within the bounds of the application, it becomes solid, and when they move their mouse away from the application, it becomes opaque again.
The obvious problem is that MouseEnter and MouseLeave are control-specific and so they fire every time you move over a button or menu or whatever, so Leave and Enter are constantly firing even though you haven't "left" or "entered" the application.
So, is there any way to create mouse events that only fire at the application level?
I have a tools strip menu item with dropdown items that are created dynamically.
For Each file In files
Dim newMenu As New ToolStripMenuItem(FileNameOnly(file))
tsmMachType.DropDownItems.Add(newMenu)
Next
So how would I go about setting up or creating events for these items? I need to have a check event and click event for each of the items.
I have VB 2008 Express and I am also new to VB. My problem is I cannot find any assistance with creating an Event that is attached to a Control that I inserted on a dynamically creeated TabPage. I call the "create_tab" sub (below) that creates a New TabPage and add some Controls (Button, two textboxes). Now, that I have the TabPage (and there could be multiple), I want to bind an Event to these items. So when a user Clicks on the Button in TabPage1, for example, a Sub executes where I can manipulate the data contents of the textboxes. Here's My code that creates the tabpages dynamically.
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I was looking for a tutorial and i find this
[URL]
but it does not give the sample code for creating a user control with properties, events, methods
complete to create windows user control? that includes creating properties, events, methods? and if it has how to create web user controls better