Unable To Register Event Between Classes?
Aug 5, 2010
I am unable to register event, following is my code snippet
Class 1
Public Delegate Sub ReceivePacket(ByVal sender As Object, ByVal p As PacketHeader, ByVal s As Byte())
Public Event OnReceivePacket As ReceivePacket
Class 2
In Function of class 2
If rcvPack Is Nothing Then
rcvPack = New dotnetWinpcap.dotnetWinpCap.ReceivePacket(AddressOf ReceivePacket)
wpcap.OnReceivePacket += rcvPack
End If
I am getting error on wpcap.OnReceivePacket += rcvPack
unable to access event variable of class 1 in class 2 function
View 2 Replies
ADVERTISEMENT
Aug 5, 2010
I am unable to register event, following is my code snippet Class 1
[Code]....
View 2 Replies
May 22, 2007
I just installed Visual Basic 2005. I am having problems registering the windows media player on my toolbox.I followed the instructions on Article 821767 titled "How to play audio files using Visual Basic .NET or Visual Basic 2005", and selected the msdxm.ocx COM component. I keep getting a "Self-registration for C:WindowsSystem32msdxm.tlb failed" message.
I am using Windows VISTA and I have installed SP1 for VS2005. The VS2005 is run as Administrator.
View 4 Replies
Sep 26, 2009
I try to install Visual Basic 4-32bit on Vista Business but I get an error message 'VBCustom_Controls_Actions_Reg_Graph was unable to register itself in the system registry' ; is there a way to get around it ?
View 1 Replies
Dec 28, 2011
Ultimately, what I want to accomplish is an AJAX-based messaging system. I already have a database table for messages, and an ASPX to add new messages (and declare old messages no longer relevant).
The current messaging system simply polls the server every 15 seconds, and re-pulls the current message set.
What I am looking to do is: On $(document).ready(), register an ajax callback function that listens for a server-side event (e.g., MessagesUpdated) On table insert/update, fire MessagesUpdated server-side.
This way, whenever the table is updated (or new records added), any clients listening know that new data is available and can re-poll the server then.
Ideally, I'd also like to make the new data available as an event argument (to minimize re-polling the db).
I can find references to something like this in other languages, but I cannot find any actual code examples to get me started.
Assuming this is possible to do via .Net, can anyone help get me started on this?
I'm using the 2.0 Framework. Also while I added a VB.Net tag, I can read C# reasonably well, so please feel free to post in either language.
View 4 Replies
Feb 18, 2010
How can I do a function when I click somewhere OUTSIDE of my form? Like say I click on a desktop icon and a messagebox comes up saying "You clicked" or something...
View 2 Replies
Jan 24, 2011
i know how to make a mouse over event using html code and javascript but i am interested in knowing if there is a way of making the mouse over event using c# and/or vb.net. i tried using the attribute.add for label, but doesnot work
[Code]...
View 1 Replies
Sep 10, 2009
When i try to install the Visual Studio 6.0 in Vista , am getting following error message,"setup was unable to create a DCOM user account in order to register 'C:programs FilesMicrosoft Visual StudioCommonToolsVS-Ent98Vanalyzrvalec.exe"
View 1 Replies
May 10, 2012
I am trying to create an interface and then about 3 or 4 singleton classes that would be accessed via the interface.I know how to get interfaces to work and I know how to create concrete singleton classes and access them via GetInstance(). But when I put the two together, failure results.My problem is in the GetInstance method of the concrete singletons as in
Public Class MovingList
implements ISelectedList
[code]....
ISelectedList is the interface. This fails because ISelectedList.GetInstance is not of the type MovingList. Plus there is a problem with the use of Shared that I think is solved by simply deleting it (interfaces implicitly share).I can't define the type of ISelectedList.GetInstance because each of my singleton classes is of a different type even though they implement exactly the same properties and methods.How best to implement such singleton classes? I could do away with the interface and simply deal directly with the concrete singletons but that feels like bad practice. Programming to an abstraction not an implementation and all that.
View 6 Replies
Feb 25, 2010
I downloaded visual studio and the 30 day period to register expired and i cant start it to register.i uninstalled it and reinstalled it and it still wont let me start it up to register it. what can i do to get the key?
View 3 Replies
Feb 1, 2007
Does anyone have an example of how to register an automation server in the ROT (Runtime Object Table) using IRunningObjectTable.Register and how to revoke it using IRunningObjectTable.Revoke?
View 1 Replies
Sep 21, 2011
I'm completely confused about the event handling. I read some articles about it but after it I just get confused to write and use them in my classes.This is my class i. e.:
[Code]..
I dont have any argument passing. But I want to know how should I do it too. And I wanted to know if each instance of the Test class, run this event separately I mean each instance by themselves, This event AnEvent() will occur? Cuz I have lots of instances from my class.
View 2 Replies
Mar 11, 2009
I've 2 projects- one containing GUI and another a DLL project containing some implementations. I'm using Classes in DLL in my GUI. All that I wanna do is when some results are manipulated in the DLL, the final output from DLL should be made available in the RichTextBox present in the GUI project. I tried the WithEvents and also Add Handler. But its not working.In the DLL, I added...
Public Event Report(ByVal info As String)
RaiseEvent Report("The folder has been Copied.") In the GUI, I added...
Public WithEvents Log As RTAF_DLL.CServer // RTAF_DLLis the project name.
CServer is the class // in which the event has been writtenLog = New RTAF_DLL.CServer
Protected Sub Log_Report(ByVal info As String) Handles Log.ReportMsgBox(info)
// Even this is not getting printedMe.RichTextBox2.AppendText(info)End Sub
The problem here is I'm not sure whether or not the event is getting raised. But I set a breakpoint and found that the Event is not handled.I tried including Imports System.Runtime.InteropServicesBut its not working.
View 10 Replies
Dec 22, 2010
I'm trying to raise an event in class A and catch it in class B which does not contain class A. Is this possible? [code]
View 10 Replies
Nov 20, 2009
I have a WinForms class that presents a TreeView of some network nodes. I have a separate module that interfaces with the network and detects when nodes are added or removed. I would like the module to trigger the TreeView when the network changes.Example
Public Class Main
Friend Sub TV_Main_Network_Click ( ByVal sender As System.Object, _
ByVal e As System.EventArgs) _
[code].....
View 1 Replies
Sep 14, 2009
1. What would be a "Mouse Click Event" (WHOLE Screen, once mouse is clicked, code happens)
2. How would I register a HotKey for the "mouse click event"?
3. Code to move mouse down, So at the center of screen, mouse is moved maybe by 10 Pixels.
View 4 Replies
Mar 14, 2010
I have a program that has a large set of classes in it. A certain incident (I won't call it an event, yet, as that has a specific meaning that will cause trouble later) needs to a relatively small subset of these classes a question. The subset of classes will need to respond to the question, but for it to be able to do so, the classes may first need to ask a similar question of the same subset, which may prompt yet a further question, though this recursion will never go more than three or four levels down. Since only a small subset of these classes will participate in the questions, while the majority will never participate, and since all of these classes are virtually identical, and I can know at design time whether any given class is part of the subset or not, an event is appropriate. The main class can raise an event, and those classes in the subset can handle the event, while those classes that are not in the subset won't handle the event. Furthermore, any of these classes can raise the event again with different parameters, as needed. Thus far, an event appears to be ideal.
The problem is this: As a result of the event, each class will need to add one or more strings to one of two lists. Event handlers can't return anything, so I can't be using the return values from functions to populate these lists.
Two options appear possible:
1) Include the two lists in the event arguments.
2) Have the two lists be accessible to all classes, and don't pass anything around.
The second part of the problem is that the event is effectively a question being asked of each class, and no action can be taken until each class has responded. If I simply raise an event and let each class respond, can I be certain that all classes that should respond have? An alternative solution would be to have each class expose a method, and call these methods for each class in turn. By doing this, I could get return values, but I would have to call the methods for ALL the classes, not just the subset that actually cares (the classes are all different types, but they all implement a common interface, and are added to a List (of ) that interface, so I can iterate through them all without much difficulty). So, the event seems more efficient, but adding a function to the common interface for the classes is the approach most certain of being a solution.
View 7 Replies
Oct 14, 2009
I've got a bug in my program that I can't work out, during a paint event. The only way I can think to solve it is to watch the screen being updated one thing at a time. Problem is, I've put a break in and then I try stepping through the program one line at a time, but when I go to look at the screen it's blank - probably because I'm in the middle of a paint event? Is there some way that I can get my screen to update after each command?
View 4 Replies
Nov 10, 2009
Im trying to send keys to cod4, Jump (space) works perfectly after i added the keyup after keydown, Before i added Keyup for W (move forward) it would jsut spam and keep running forward, but after i added keyup it doesnt move forward at all, not even a little bit
note: it does send W and space to regular windows,
ElseIf command.Contains("keyboard=space") Then
Call keybd_event(System.Windows.Forms.Keys.Space, 0, 0, 0)
Call keybd_event(System.Windows.Forms.Keys.Space, 0, KEYEVENTF_KEYUP, 0)
[code]....
View 2 Replies
Jun 19, 2011
i have this code
Private Sub bwrkMain_ProgressChanged(ByVal sender As System.Object, _
ByVal e As System.ComponentModel.ProgressChangedEventArgs) _
Handles bwrkMain.ProgressChanged[code].....
but the status text does not change, debug.print does print the message though.i am calling the ReportProgress from another thread created by the backgroundworker thread.
View 1 Replies
Jul 21, 2009
Winforms, VS2008 I have a mainform that has 2 usercontrols: UC1 and UC2.UC1 has a treeview with treenodes. UC2 has tabControl with few tabPages. Selecting different nodes displays different details view in the TabControl's TabPages. What I need is canceling the event when the user has selected a node in the treeview, then he selects another node (i want to be able to cancel this last event:selecting another node, all depending on a certain logic)I mean: When the user is working on a tabpage in the tabControl, when he clicks on a different node in treeview (different from the currently selected node), before displaying the new node's details in the TabControl, I perform some logic, then depending on that logic, I set
e.cancel = true in the UC2 Validating event handler. (Rememebr UC2 includes the TabControl and the user, supposedly, has the focus on a control somewhere in TabControl)
But mysteriously, the event gets never canceled and the user still moves to the next node, displaying its details in the TabControl, although I set e.cancel = true.
View 4 Replies
Jan 23, 2012
I have two classes, one nested in the other. [code]Neither "Name" or "ID" are unique between operations and records.I wish to construct a dictionary using LINQ = Dictionary(Of String, Of List(Of Integer), whereby the keys are uniqe examples of Names in my collection and the values are the collective set of distinct IDs that are associated with those names.
View 2 Replies
Jun 13, 2012
How can I structure my classes so that the user interfaces though a single class while the supporting classes are hidden from their view? I think its best understood in an example:
Public Class MyInterface
Public Economic as EconomicClass
Public Sub New()
MyBase.New()
[code].....
So you might ask why am I even separating them? It's strictly for others who will be working with this interface. I need to funnel them though a logical structure:
interface.Economic.MyMethod
interface.Currency.MyMethod
etc
This way everything is already handled for them in the background and they only need to run the method they need. I don't know if I can have it both ways in VB.NET.
View 23 Replies
Oct 24, 2009
Here is some example code of what I mean:
vb
Public Class Form1
Private Sub Button1_Click(ByVal sender as Object, e as systemEventArgs) Handles Button1.Click
[Code]....
View 5 Replies
Jul 10, 2009
I m trying to raise Click event of Textbox explictly but I m getting "Derived classes cannot raise base classes" error.[code]....
View 1 Replies
Feb 5, 2011
<li><a href="register.php " rel="nofollow">Register</a></li>
Driving me nuts..I'm trying to create forum type software but I can't seem to figure out how to programmically click on this link
Tried by id and by tag but there isn't one for this...what is the work around for this?
View 1 Replies
Jun 17, 2009
Within my program, I'd like to allow the user to hold the CTRL key down while double-clicking with the mouse. Specifically, within the treeview control, I'd like to allow the user to be able to CTRL-DoubleClick but the DoubleClick event has the EventArgs parameter that doesn't provide any keyboard data.I'm guessing that this is possible, but I'm just drawing a blank on how to implement it.
View 5 Replies
Sep 24, 2010
so far i got
code
For Each item As Reflection.FieldInfo In GetType(NameSpace.ClassWithNestedClasses).GetFields
rtfAppend(item.Name & ":" & Tab & item.GetValue(Me))
Next
For Each item As Reflection.PropertyInfo In GetType(NameSpace.ClassWithNestedClasses).GetProperties()
[code]...
which gets me the simple string vars and properties of my top class, but how can i apply this to loop through all sub classes and get there vars and props?
View 1 Replies
Oct 13, 2011
Searching the internet finds no less than 700 different ways and opinions to accomplish what I'm trying to do, and I would just like to know the simplest, most bullet-proof way possible.
[Code]...
I simply want to extract the string "bar," which is inside <hostName></hostName>I can do this easily enough with simple string functions, but I'd like to do it with one of the .NET XML classes/methods.
View 2 Replies
Jul 31, 2010
I've read thru Iceplug's tutorial on control arrays and got it working. I tried to add a new event by basically copying his click event code and calling it a doubleclick event. I used the proper addhandler and assigned the correct name to my sub. I have the click event changing the background color to blue and the doubleclick event changing the background color to green. The background color does not change to green. Why?
Heres the tutorial with my new code encased in asterisks ...
Code:
Imports System
Imports System.Windows.Forms
Public Class form1
[CODE]...
View 7 Replies
