Created A Getter And Setter
Aug 12, 2010
I created a getter and Setter in Visual Basic. I have some questions though. Please look at the code below.
A.) At line 1 below, should "pieces" be declared as Private?
B.) In the IDE at lines 4 and 7 the IDE keeps changing those variables to uppercase so that the property name "Pieces" is the same as the variable name "pieces".Should I instead define the integer pieces with an underscore: _pieces ?That is the only way I can get around the IDE forcing the variable to become uppercase. [code]
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Aug 24, 2010
In my application I need to allow for someone to enter in a floating point value.However that value will be rounded up to an integer.The challenge here is that I am using a getter and setter.If I try and use mixed data types in the getter setter,[code..]
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Jul 29, 2011
I have a class like this:
Public Class MyClass
Private _intList As New List(Of Integer)
Private _avg As Decimal
[code]....
The Getter is calculating average and calls Setter to save the value. For some reason I cannot understand, the average is always 0. For example:
Dim c As New Class2()
c.Add(1)
c.Add(2)
c.Add(3)
Console.WriteLine(c.Avg.ToString()) ' This will print 0
What is the cause of this?
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Feb 23, 2012
I am retrieving several properties of a control. Here is how I used to retrieve properties (with pinfo of type PropertyInfo):
value = pinfo.GetValue(obj, nothing)
That worked well, but now I am facing a property that has a optional value, and I get an error message telling me that the number of parameters is incorrect. So I changed my code by this one:
Dim index As Object() = {Nothing}
value = pinfo.GetValue(obj, index)
At this point, I didn't get any error message, but this code doesn't retrieve the good value. It only works if I replace Nothing by the default value provided by the property accessor...
But I don't know in advance what this default value is! And this code is within a function that retrieves properties that doesn't have optional values, so I cannot change the code especially for one case or another..
I am working on .NET 2.0
EDIT: More precisions about the case leading to the problem
Here is an example of property leading to the problem:
ReadOnly Property Foo(Optional ByVal Number As Integer = -1) As String
Get
If Number = -1 Then
[Code]....
With this kind of property, none of the codes above retrieve the good string.
My best guess would be to try the first code for general purposes, catch the appropriate exception, and then dynamically retrieve the default value of the parameter (Number in that case) and its type, so that I can call getValue with this default value.
So, How can I retrieve the default value of the optional parameter?
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Dec 19, 2011
I am trying to set a flag when a collection is modified - the logical place to do that seemed to be in the setter method. The problem is when I use this code
[Code]...
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Nov 10, 2009
I've got 2 classes, one called row and one called value. The row class has an array of value as one of its properties. The row class also has a property called flag which will contain an enum for how it has changed. On the setter for value I was hoping to update the flag property of row, but I cant work out how to do it via modern OO. Here's the
Public Class Row
'Variables
Private values_local() As Value
Private flag_local As DataFlags
'Properties
Property values() As Value() .....
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May 28, 2010
I'm building an abstract class that handles some common operations for all of my data access objects. The class will utilize generics, so I can't make direct calls to constructors, business object properties, etc. Reflection is way too slow for what I want to accomplish, so I am using a DynamicMethod, ILGenerator, and Delegate caching instead (sample will follow).
The method I'm currently working on is a Private Shared method that populates a list of business objects using records from a data table. I'm having a problem building the property setter via IL. I'm getting an object reference error, but I'm not sure how to fix it. I believe the error comes from the "target" being Nothing, but the parameter I'm passing as the target is not Nothing at the time of invocation. Here are some snippets of what I've got so far:
'class declaration -- TList is strongly-typed list of T
Public MustInherit Class DataAccessBase(Of T, TList)
...
'delegate declaration
[code]...
I'm assuming the obj is not being passed correctly as the target, thus causing the target to be Nothing.
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Jan 5, 2011
I want to create a simple function that does the following:
Sub SetValue(Of TInstance As Class, TProperty)(
ByVal instance As TInstance,
ByVal [property] As Expression(Of Func(Of TInstance, TProperty)),
[code].....
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May 23, 2011
I have issue with a Nhibernate projection list, It keeps saying it Could not find a setter for property 'Commname' in class 'Label6.Domain.Product' or could not resolve property "pl.commname"
the property "commname" is a part of the object productslangs.
My product object looks like this:
Public Overridable Property Latinname() As System.String
Get
Return _Latinname
End Get
Set(ByVal value As System.String)
[Code] .....
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Jun 10, 2011
Is there a way for implementers of an interface where a ReadOnly property is defined to make it a complete Read/Write Property ?
Imagine I define an interface to provide a ReadOnly Property (i.e., just a getter for a given value) :
Interface SomeInterface
'the interface only say that implementers must provide a value for reading
ReadOnly Property PublicProperty As String
End Interface
This means implementers must commit to providing a value. But I would like a given implementer to also allow setting that value. In my head, this would mean providing the Property's setter as part of the implementation, doing something like this :
Public Property PublicProperty As String Implements SomeInterface.PublicProperty
Get
Return _myProperty
[code]....
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Apr 10, 2010
I am trying to test that a property has been set but when I write this as a unit test: moqFeed.VerifySet(Function(m) m.RowAdded = "Row Added") moq complains that "Expression is not a property setter invocation" My complete code is
[Code]...
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Aug 27, 2009
I searched on the forum / Internet for the solution how a PropetryInfo object (of a Public property) can reveal if it has a Private Protected Setter ... it was all in vain .... all help I found was about how to "Set" value of a public property having a Private Setter.I would like to know if I have a PropertyInfo object of a public property, how would I know if its Setter is Non Public?
I tried, in a exception handling block, where I did a GetValue of the PropertyInfo object and then called SetValue by setting the same value back... but to my surprise it worked well and didn error out.
[Code]...
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Dec 11, 2011
Just playing about with some vb.net and i dont understand why when i enter Dog into the text box the label continues to say not dog?
[Code]...
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Jul 26, 2011
I have an editor created invb.net that creates html files. And when i click the button run , the Internet Explorer opens my file that is inside the Richtextbox.
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Jan 11, 2011
Why does an interface override a class definition and violate class encapsulation? I have included two samples below, one in C# and one in VB.net?
[Code]...
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Apr 14, 2012
I am creating an Excel Add-In using Visual Studio 2010. My intention was to add a context menu to a cell and perform some action on the selected cell or cells. Here is the code I have got as of now
[Code]...
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Oct 5, 2009
If you want a instance of an object to be created when a form loads or another class is created, you have two options:
Public class example
private IAmAObject As IAmAObject
public sub new()
[CODE]...
Or like this:
public class example
private IAmAObject as new IAmAObject
public sub new()
[CODE]...
I always use the first one. It's more type work but I think it's neater. How about you people and is there any real difference between the two?
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Dec 5, 2011
I can usually find the answers to most of my questions via the Google Gods, but not this time.I have a form that has a TabPageControl and on that page a collection of labels and text boxes via a usercontrol.
On the form I have a button that allows the user to create a new tabpage, when the code adds a new page, it automatically adds the UserControl collection. I can't get my head around how to access the objects on the newly created tabpage.
What I need to be able todo is take the index of the tabpage that has focus and translate that against the UerContol name, but I havn't a clue how to do it!
[Code]...
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Dec 16, 2011
I am adding a grid of buttons to a form at run-time, and all of then use the same Handler.My question is : Is there any way I canadd the TextBox at run-time ?I know how to but without it on the form, the IDE isn't very happy about the "MyClick" Sub - TextBox1 is not declared......
' some logic here to make nice rows and Columns of buttons
' with different .Text and .Name
Me.Controls.Add(btn)
[code]....
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Jul 16, 2009
I have an application that dynamically creates winforms.
Dim NewS As New Form
Dim NewT as new Timer
NewT.Interval = 5000
[Code].....
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Jul 16, 2009
I have an application that dynamically creates winforms.
Dim NewS As New Form
Dim NewT as new Timer
NewT.Interval = 5000
[code]......
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Oct 12, 2011
I need to redirect my page based off of the ID that was just created.This is my insert statement that generates the ID that I will need to fetch for the redirect.
'SQL Insert: Product table
Dim sqlInsertProduct As String = "INSERT INTO Product
(ProductName, Status, CreateDate, ModifyDate,
CreateUser, ModifyUser, Price)
VALUES (@ProductName, @Status ,getdate(),
getdate(), @CreateUser, @ModifyUser, @Price)
[Code]...
The Response.Redirect is all the way at the bottom of the page after 3 other inserts into 3 different tables. The only thing I can think of to make this work is to put the redirect into that using, but I can't because I need the other tables to get inserted into and it wouldn't make sense to redirect before the rest of the inserts.
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Mar 14, 2012
So, I'm at the stage where I have created checkboxes through the codes.Not through the toolbox.
They are added correctly to the form when I test it.Checkboxes can be checked or unchecked correctly.
But my problem is this:I want to use events mouseclick or mousehover with those checkboxes.
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Nov 28, 2005
Is it possible for me to create a system in VB.NET which allows the SERVER (Personal Computer) to send a FREE SMS to any mobile devices automatically when the users are at certain place and do I need any additional external devices to make the system work? If yes, what kind of devices do I need?
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Apr 29, 2009
I have created a program in vb.net, something like a inventory system. a simple one.. my only problem is, how can i add a configuration option where my user can select which server he will use for the database?
I tried using a sqldmo.. but it has an error when i instlled my program to another pc. But ive already add a reference to it.
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Jun 21, 2009
i am syed hassan from pakistan i want Lan Messanger in VB . net with source plz tell me from where i get it..
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Nov 28, 2011
I have created a library which generates a .DLL file that I include in some of my projects. Now my question is that I have 2 databases, a development and a production one. I want to give the user using the .DLL file to have the ability to select which database they want to query. How can I achieve that?
The way I know how to do it will require them to manually select the database EVERY TIME they call a function..
[Code]...
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Apr 20, 2012
i am creating a console app that will delete pictures from a directory every 30 minutes. Problem is that its being populated by files every minute or so. So if i go and delete files in that directory then it may cause an error trying to delete a file thats being created just then or opened.
I currently have this code to copy the files to another directory and then delete them from the source directory.Dim f() As String = Directory.GetFiles(sourceDir)
[Code]...
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Apr 29, 2011
I am trying to add text to an already created file on vb.net. When I run the program there are no errors and it writes everything to my liking, but currently when it goes to save, it makes me create an entirely new text file with any name I choose to give it. What I need to do is for it to automatically get added onto the end of an already created text file without deleting any other part of the file, which we will call "data.txt." Here is the code I already have
Imports System.IO
Public Class Frmadd
Const FILE_NAME As String = "data.txt"
[Code]....
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Dec 29, 2011
I know AsyncPageTask creates a thread which we can use for long running processes, i was wondering where this thread is created as i am sure it does not use IIS request processing thread, then where this thread exist ?
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