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()
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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 RepliesHow 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 RepliesI have a large problem with inheritance in vb.net. The problem is the following:
I have 2 forms => frmBase and frmChild
In frmBase i want to create a method Called StartWorking() and i want frmChild to inherit this method.
But here is the tricky thing: when frmChild.StartWorking is called i would like the following => without calling MyBase.StartWorking()
I want frmBase.StartWorking() to be executed first and after a test in frmBase.StartWorking if blnValue is true then frmChild.StartWorking has to be activated. if blnValue is false that frmChild.StartWorking cannot be activated.
I have successfully added textboxes to a form at runtime. I have also succesfully added an event handler to these same textboxes. What I'm having trouble understanding is how to refer to these textboxes programmatically after they have been added. Specifically, how do I;
1) Retrieve user data entered in those textboxes without an event handler
2) Find a specific one of those textboxex later (is looping thru all controls of type "textbox" the only way)?
purpose of find is so that I can set the value of the corresponding textbox programatically, based on some criteria Here is the code (all within in a for loop, where intvararycount is incrementing to a set limit) I have used to add the Textboxes to a Panel on a Form;
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Consider a MyForm class that contains a shadowed implementation of Show(). It also contains a CreateForm() method, which accepts an instance of the form and calls the shadowed sub:
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i have the following property declaration
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i have problem when addnew row at keyup event for datagridview control. i want to add one row when method addRow() called.
View 2 RepliesI'm working with a VB.Net page which calls a web method from JavaScript, this was working upto a week ago and now for some reason is not working.
Firstly my page generates a list of items that can be clicked, The line that does this is:
TicketHTML = TicketHTML + "<td><img src='../images/delete.png' Class='imgTicketClose' alt='Delete Task' onclick='DeleteTicket(" + row("id").ToString() + ")' /></td></tr>"
I know this is working as when the item is clicked I get a javascript popup so I would assume the problem is not here.
Now my Javascript:
function DeleteTicket(ticketID)
{
var answer = confirm("Do you really want to delete this task?")
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EDIT: Could anything in the web.config file be preventing page methods from executing? I have just noticed this happening with a completely seperate web method and have checked the integers being passed into the javascript with an alert() and they are all valid
I have a class which i realized will not always correctly instantiate and as a quick fix, i figured i'd subclass it and shadow a few methods so that the program can continue to run without exploding. When i run the software, calls to the methods resolve to the base's implementations and not the subclass. I'm using VB.NET with .NET 2.0. Here is an example of what i'm trying to do[code]....
View 1 RepliesWhen I put a breakpoint in a method I'm calling from a lambda expression, the breakpoint is never hit. When I move the method call outside the lambda, the breakpoint hits.
For example:
Function IncrementAll(ByVal items As IEnumerable(Of Integer)) As IEnumerable(Of Integer)
Return items.Select(Function(i) Increment(i))
End Function
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If I call IncrementAll, the breakpoint in Increment does not get hit. Is there a way to make VS 2008 stop on these breakpoints? I hate the thought of rewriting all my LINQ into loops just for debugging.
I am trying to use the AAA syntax in Rhino Mocks with VB.Net to validate that a method was called only one time. I can't seem to get it right. With this code, if the repository is called twice, it returns nothing on the second call, and the test passes. I would have expected the test to fail when VerifyAllExpectations was called.
<TestMethod()>
Public Sub GetDataCallsRepositoryOneTime()
Dim repository As IDataRepository = MockRepository.GenerateMock(Of IDataRepository)()
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I create a UserControl (TableWithFilter.xaml) with a dependency property (source). The UserControl is a Table with a source property for the different items. I created the XAML and set the source property via the XAML Binding. So far so good.
But if the value of the dependency property is changed, the defined callback method is not called. Therefore I cannot update the entries in my table. Has anyone an idea why the callback method is not called?
Here is the definition of my property in the class "TableWithFilter":
Public Shared ReadOnly SourceProperty As DependencyProperty = _
DependencyProperty.Register("Source", GetType(List(Of TableViewItem)), GetType(TableWithFilter), _
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If the attribute "ContentList" is changed I expet that the "ChangeSource" method in the TableWithFilder class is called. But this is not the case. After I changed the ContentList attribute, I Raise the following Event:
RaiseEvent PropertyChanged(Me, New PropertyChangedEventArgs("ContentList"))
I'm trying to write a method that is called from a variety of forms at load. So with a Form1 load event I would call the following:
Dim testpoint As New Point(10, 20)
DrawVerticalStringFromBottomUp("Hello", testpoint, Me)
The DrawVerticalSTringFromBottomUp Method is as follows:
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When I call the code at a form's load event, nothing happens. When I call it from a button click after the form has loaded it works! I know this should be called from the paint method, but that doesn't suit my purposes.
way to make this work from the form load event?
I will try to explain what I need.Let's say that I have a class like this:
Public Class Example1 Public Sub ToBeCalled()
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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()
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I have three class files, accounts.vb and transactions.vb in addition to my form.vb. I am unable to retrieve a member variable from on class from inside the other. When the combobox index changes, the program loads the correct account (checking or saving) from two different sequential files. I don't think I have the calcBalance procedure in the correct class file. And that is what I am having trouble with. Accessing it to display it. [Code]
View 1 Repliesif I put controls on form1 like button,textbox....etcwhy called this control fields not object in the class diagram ?
View 7 RepliesWhen 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 RepliesOkay 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 RepliesI 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 RepliesI've been creating short test apps repeatedly to try to understand some of the concepts in VB.NET.For the most part it has been illuminating.I read Bucky's .NET knowlegebase tutorial on passing objects as parameters to newly created forms. He shows how to create a new class that inherits from the base form class and define a New() method with parameters Extending the concept I thought about doing the same thing with a form that was created at design-time (In this case Form2).
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Base class has one field to hold numeric balance value. With 2 methods that accept arguments for adding and subtracting the new input calculating new balance. Sub class has four fields dates, transaction, memo and amount.I have a deposit form, and withdraw form. Each time one transaction is entered it creates an object with sub class fields, then adds to the account collection. My problem is not understanding how to call the deposit/withdraw method and pass the current transaction amount back to the base class to alculate the new balance. Does anyone have any links to information/tutorials on how to perform something like this? As you can see with my code I have tried various different approaches without any success.
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This is code i have in a class called appmgr which runs at startup of app
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Supose a base class
Public Class airplane
Private var_num_seats As Integer
Private var_num_engines As Integer
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Obviously, I don't wish that the class Glider has the method "start_engines" neither the property "num_engines". Otherwise, other child classes may have. How can I supress these property and method in child class, not just ignoring (if I can)?
class
eg: dim classobj = xyz("CLASS_NAME") ' where classname is a valid class name
and dynamically raising a known method of that class on that newly created object or class reference.
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I've an app that starts to work from a module wich should load a form an do other things with a class library who raise an event an the form shoud cath it.The problem is that applicarion.run(frmMain) displays the form in the same thread the the code stops work while the form is open. And I need that the app works in this way because the user need to send files to the app using args and this avoid that the app init another instance of it (in other code) and update the form with the info when the event is raised.[code]
View 9 RepliesI have created an application where from the starting class a modless dialog box is called. Once the dialog box is called then the program will close instead of waiting on the dialog box to call the appropriate functions.
A couple of notes: This was originally written in VB 2005, and I was successful by manipulating the automatically generated code for the starting and clean up for the class. I cannot find this section of code in my VB 2008 project.
I cannot start the program from inside the dialog box, since there are multiple dialog boxes and which one starts depends on what is currently running on the computer.
The program will run with a modal dialog box, but it does not function properly, so I must use modless.
Please help me to prevent the application from closing when it reaches the end of the code in the main subroutine. I want to have a function to explicitly close the application.
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
I've an app that starts to work from a module wich should load a form an do other things with a class library who raise an event an the form shoud cath it. The problem is that applicarion.run(frmMain) displays the form in the same thread the the code stops work while the form is open. And I need that the app works in this way because the user need to send files to the app using args and this avoid that the app init another instance of it (in other code) and update the form with the info when the event is raised.
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