Pass A Function To A Class To Be Called Later?

Dec 11, 2010

Okay so what im trying to do is make a simple particle system in VB (Yes i know this isnt a ideal setup). Im going to have particles dieing and spawning new ones tho, To do this i need to be able to pass a function to the particle when its created then call that function when it dies. Is there a way to do this by passing function pointers?

View 9 Replies


ADVERTISEMENT

InvokeRequired Returns False When UpdateLabel Function Is Called From A Different Class?

May 10, 2012

I am working with tasks, so I've got the following code to update a label on my form:

Private Delegate Sub UpdateLabelDelegate(ByVal s As String)
Public Sub UpdateLabel(ByVal s As String)
If Me.InvokeRequired Then

Me.BeginInvoke(New UpdateLabelDelegate(AddressOf UpdateLabel), New Object() {s})
Return

View 2 Replies

Call A Function From Inside Another And Suspend It Until The Called Function Is Finished

Jan 25, 2010

How can I call a function from inside another function and suspend the calling function until the called function is finished? I hope I can get some replies because I don't know how to ask the question and make sense:).

Anyway what I am trying to do in steps:

1. The user clicks button1 which triggers the click event.
2. From the click event I call a function
3. I then pop-up a form, that has instructions for the user to read.
4. After the user has read the form he will click the "Done" button and return to the calling function.

The problem is the the calling function continues to execute. I want to stop execution of the calling function until the users clicks the "Done" button on the instruction pop=up. I know I can use a msgbox but the instructions can be lengthly and does not look good in a msgbox.

I have tried the Call method with return in the "Done" button click but I can make that work. I also tried a goto statement but I can get that to work either. In the call statement I said call frmInstruction.show() and it got there but as I said the calling function continued to execute.

View 3 Replies

Does Subroutine Called By A Function Have To Finish For Function To Proceed

Jun 5, 2011

If a subroutine is called within a function, does the function always wait until that subroutine is completely finished before it will proceed with the rest of the function? If so, is there any way to make it not wait and continue on with the rest of function and not care what happens in the subroutine?

View 3 Replies

VS 2010 : Convert A DLL Function Call Which Has The Callback Function Routine Called Within The DLL Function Call?

May 25, 2012

I am trying to convert a DLL function call which has the Callback function routine called within the DLL function call.The DLL function call signature is like this:

typedef void *HANDLE;
typedef HANDLE HACQDESC;
DECLARE_HANDLE (HWND);

[code]....

how to convert this DLL call to VB.NET and also how to create the callback function and send it as parameter to this function
call.

View 15 Replies

How To Pass A Function To A Function Is Functors/function Objects Avaiable In VB2010

Oct 12, 2011

I want to make an numerical integration method with takes in an analytic function and integrate it over a specific interval. For the numerical integration procedure I want to use some procedures in nr.com. The problem is that these are programmed in C++ and they uses functors to pass a function to the integration method. How can I do this in VB 2010?

I want to initialize the function (i.e. set a=1,b=0 for function y(x)=a*x+b) and then pass the function to the integration method. Then when the integration method call the function it only calls the function with one parameter (i.e. x since a,b is already set)

What is the best way to do this in VB2010?I want to make a general integration method where I can pass any single valued function and integration limits.

I have just started using VB, and from what I have found so far it seems like the tools you have is

- to us a delegate for the function
- to use a lambda expression for the function
- send a pointer/adressOf
- to create a function class/structure and submit this to the function

As for now I am most inclined to create a function-class. But I am not really sure how.F.ex. I make different classes for each "uniqe function" I want to integrate, but how can I pass them to the integration function when I need to specify the argument type in the integration-function-call?This seems like a basic problem which applies to many Math operations, so I think it would be very useful to clarify this.

View 2 Replies

Make A Function Called "checkLogon" That Checks The Username/password Text To A Variable In That Function?

Oct 22, 2009

I've got a basic logon form where if you enter the right password/username, it redirects you to the "MainMenu" Form How can I make a function called "checkLogon" that checks the username/password text to a variable in that function?

View 3 Replies

Pass Function (Of TElement / TKey) As A Function Parameter

May 28, 2012

I want to make a GetAllContacts method which takes a sort parameter of type Func(Of Contact, TKey) which is the same type that the OrderBy method for an IEnumerable(Of Contact) takes.[code]"Too many arguments to extension method 'Public Function ElementAtOrDefault(index As Integer) As Contact' defined in 'System.Linq.Enumerable'." on the second parameter.

View 2 Replies

[02/03] Base Class Called PageBase And Then A Derived Class TestPage That Inherits From PageBase

Feb 4, 2009

I have a base class called PageBase and then a derived class TestPage that inherits from PageBase. In PageBase I have overridden the OnInit() and when it is called and I inspect the value of 'Me', it is of the type of the derived class and not the base class. My question is how does inheritance really work? For instance, when instantiating TestPage does an instance of PageBase get created too?

Here is my code;

Partial Public Class TestPage
Inherits PageBase

Public Sub New()

[code]...

View 7 Replies

Asp.net - Insert Function Is Called More Than Once?

Jul 10, 2011

I have a website where people send each other messages Recently I noticed that sometimes the same message is sent more than once
For example, a message is sent four times within three seconds or twice within a second.I do not understand how this could happen, once the user clicks on the button that sends the message .So all the window switches and a message showup saying "the mail is sent successfully." I checked that if the user refreshes the page after it sends a message, then really the message is sent again.But I do not think that's the case, becouse the message is sent twice within one second.I am writing in vb.net and using mysql data base.Maybe it's related to the queue for the db, i do not know.Here's the code:

Function calls:
Call GlobalFunction.update_mailbox_table(user_id, receiverId, txtMessage.Text, private_picture)
the insert function
Public Shared Sub update_mailbox_table(ByVal user_id As Integer, ByVal receiverId As Integer, ByVal message As String, ByVal[code].....

View 2 Replies

Possible To Know Many Times Function Was Called?

Feb 15, 2010

I have a function that takes some meter measurements. If the values are not close enought I want to run the function again until the values are close enough, or until the function has been executed "X" amount of times.

View 3 Replies

Pass A Value From A Sub Procedure To A Function Procedure .... Pass The Whole Subprocedure To The Function Procedure Argument?

Mar 30, 2012

Im a student doing an assignment, how do i pass the value from a sub procedure to a function procedure....i want to pass the value from decSubtotal to a function procedure named CalculateDiscount; check out my code--

[Code]...

View 1 Replies

Function Not Getting Called, And Program Stopping?

Apr 18, 2011

I have a function to pull data from a XML, and to report a specific number based on a value in one of the elements in the XML. Unfortuntately, I can't get any break points to work, so I've been debugging with a trace.he strange this is that when i take out the function itself it works like it should, otherwise the Service freezes when it gets to the function and never uses it. I'm calling the function in while loop which is also within a Try Statement, here's example of the code.

Public
Shared Function GetXNumber(ByVal
audit As Audit.API)

[code].....

View 12 Replies

VS 2008 Function In Module Is Not Being Called

Jul 13, 2011

I have the following statement and the function 'InitialiseOsTransform' is in a Module which is in the project.

If InitialiseOsTransform() = False Then But instead of the code going into this function it goes into the Paint function.

I have used the similar code in another project and it works correctly.

View 11 Replies

VS 2010 What Function Gets Called For X Close

Apr 1, 2011

I am wanting to perform certain processes before the program closes. I can get them through the File > Exit part of my menu, but I can not find the VB6 form_unload equivalent in VB2010. I have tried Form_QueryUnload but it never gets called when I close by using the RED "X".

View 12 Replies

Class Diagram - Called Control Fields Not Object In The Class Diagram ?

Nov 11, 2011

if I put controls on form1 like button,textbox....etcwhy called this control fields not object in the class diagram ?

View 7 Replies

Return A Value From A Function That Called From First Forum (Uses 2 Forums)?

Aug 8, 2010

I have got 2 forms, Form1 and Form2.I called a function that was located on Form2 from Form1, and want to return the value that is in the function on Form2, to Form1. How do I do this?I have tried the following.

Form1
Call Form2.Needfps()
fps = Needfps
Form2

[code]....

View 10 Replies

Timer Event Is Not Generated When C Dll Function Is Called

May 14, 2012

Net_mang_Form.Prg_bar.Visible = True
Net_mang_Form.Prg_bar.Value = 0
Net_mang_Form.prg_Timer.Start()

[Code].....

Here Net_mang_Form is Form1 and this code is written in button click event of Form2.

file_send is the function of dll .

prg_Timer is the timer control .

Prg_bar is Progress bar control.

View 2 Replies

Could Instance Also Be Called As State Of Class?

Aug 22, 2010

When we create an instance of a class we also provide its state so are these both same and if not same what's the difference? And also what's the difference when we use equals method for instance or for state?

View 3 Replies

Use A DLL That Has A Public Class Called FileCleanUp

Mar 8, 2011

I am trying to use a DLL that has a public class called FileCleanUp..Inside this class is a procedure called ProcessFiles as shown [code] In VB.Net how do I access the ProcessFiles events so I can inform the user on progress etc from my VB.net application that calls this DLL.By using Reflector have found that the DLL uses the Background Worker if this is of help.

View 1 Replies

.NET Shared Function If Called Multiple Times Simultaneously?

Mar 25, 2010

Consider I have a shared function:Public Shared Function CalculateAreaFromRadius(ByVal radius As Double) As Double

[Code]...

If I have two or more threads in the same vb .net app and each of them calls the shared function at the same time with different RADIUS, will they each get their own AREA? I want to know for each call to the function if it is using same local variables or each call creates new instances of local variables?Will the answers to above questions be same If I have multiple (2+) single threaded apps and they all call the function at the same time with different RADIUS value?

View 2 Replies

Asp.net - AutoCompleteExtender WebService Fail To Be Called When Function Is Shared?

Oct 25, 2011

I had a problem (which is now fixed) but I've no idea why.I have an Ajax AutoCompleteExtender with a WebService method to populate like <WebMethod()> _
Public Shared Function populateACE(prefixText As String) As List(Of String) However this didn't work - I put a breakpoint in, and it didn't even get hit. However... <WebMethod()> _ Public Function populateACE(prefixText As String) As List(Of String) does work (the only difference being not Shared).

Fair enough, but why? If you have an instance of a class then you can access Shared methods of it; if you don't have an instance of a class then you can access Shared methods of it. So what is going on behind the scenes?

View 1 Replies

Close Projects Or Forms Than Called By ((shell)) Function?

Aug 17, 2010

how to close projects or forms than called by ((shell)) function in vb6?

View 1 Replies

Create A Delegate And Use The Function In Program Called DoStuff()?

Jan 4, 2012

For a class, I have to create a delegate and use the function in my program called DoStuff(). There is an error tht says "Method 'Public Sub DoStuff(stringVal As String)' does not have a signature compatible with delegate 'Delegate Sub MyDel()'.

[Code]...

View 2 Replies

Function Called ProcessData(soemdate) Which Processes Dataporting?

Aug 26, 2009

In vb.net I have two data values as shown below:

Dim startp as datetime
Dim endp as datetime

I have a function called ProcessData(soemdate) which processes dataporting.

In VB.net is there a way I can do something like

For each day between startp and endp ProcessData(soemdate)Next

View 4 Replies

Class Called Appmgr Which Runs At Startup Of App?

May 12, 2011

This is code i have in a class called appmgr which runs at startup of app

[Code]...

View 2 Replies

Dispose Method - Why Class Destructor Not Being Called

Jun 22, 2011

I have a class that has a destructor and a Dispose method (I also inherit IDisposable). Why is it that the only time my destructor gets called is when I call GC.Collect()?

View 2 Replies

Method To Be Called In Child Class Constructor

Nov 11, 2009

How do I force the Visual Studio compiler to generate an error when a required method is not being called in the constructor of a child class? Like when you edit the form designer code, the compiler complains when InitializeComponent()isn't the first call in the constructor of a form. Is this even possible in VB.NET?

View 2 Replies

Programatically Retrieve The Class That Called A Method?

Sep 11, 2010

I'm wondering if there's a way to programatically reference the class that called a method in another class. Let me give you an example:

Public Class OriginalClass
Private Sub Main()
Log.PgInit()

[Code]....

View 1 Replies

Terminate Process - When The Last Function Is Called It Terminates The Execution Of The Application?

Sep 13, 2011

I have this on the form load;

Private Sub frmMain_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Me.Visible = False
Me.ShowInTaskbar = False[code].....

Notice: I used "End", to terminate the process.What I want to do is when the last function is called (Delete_AutoReq_PracNo) it terminates the execution of the application.

Reason...I'll schedule this application to ran from MS SQL Server at night. So realistically, doing all the processes I would like it to stop...Is what am doing sufficient to stop the application from running or there is a more robust approach..

View 3 Replies







Copyrights 2005-15 www.BigResource.com, All rights reserved