Implementing Interfaces During VB To .NET Class Migration?
Jul 11, 2011I'm migrating the CenterSnap.cls from its vb version to vb.NET and I'm confused about the following 2 errors after I import the vb6 project to VS 2008.
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Interfaces - Implementing Interface For Multiple Class
Oct 21, 2009I'm dealing a problem in implementing interface for multiple class.
Assuming I have a class named Class Unu .
I created an interface called Test for those 2 classes.
The first class Unu has 2 data members(i=12 and j=12.17). When you run the program it stores the result on screen 24.17
The second class called Doi has 2 data members(a=20 and b=32.17).
What I want now is to do the same thing for data members a and b so that it stores on screen 20+32.17=52.17
My problem is that I want to be displayed also the result for the 2 data members for the second class on my screen. I implemented the interface on class Doi but I cannot see why he isn't displaying me the second result 52.17.
What I must add to my code to do that?
Here's the full code:
CODE:
Specify Variable Implementing Two Interfaces Possible?
Mar 13, 2011Is is possible to implement a type specifier with 2 interfaces in .net? Something like:
Public Sub New(obj as ICollection and INotifyCollectionChanged)
''Initialize Code
End Sub
Implementing Interfaces On Classes That Already Have The Interface Members Defined?
Jun 25, 2010So say I define some interface, and that interface has members that need to be implemented under some idea, and I then implement this interface on a class that already has those members defined. How do I NOT receive errors about having to implement said members despite them already being implemented (because I didn't type the oh so ridiculous 'implements IMyInterface.foo').
For example say I have an interface that defines the event KeyPress, and then I have a custom Form that implements this interface of mine. It throws an error. VB is the 5th language I've worked in that uses interfaces... and up until now they've all treated interfaces relatively the same. This is the first time I've seen this not allowed. What perplexes me more, is it IS allowed in other .Net languages. Just not VB.
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Migratordotnet : How To Write A Migration Class With .net
Jul 19, 2011I got all C# implementations on Google, so I converted it to VB.Net, but I am not able to convert 1 line where it gives error.My Class :
Imports Migrator.Framework[Migration(1)] ' Gives ERROR Here.. How to write this in VB.net ?
Public Class mig_001
Inherits Migration
Public Overrides Sub Up()
Database.AddTable("Planets",
New Column("Id", DbType.Int32, ColumnProperty.PrimaryKeyWithIdentity),
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Add Interfaces To A Class Programmatically (at Runtime)
May 7, 2012I am looking for a way to add an interface implementation to a class at runtime.
Here is a sample code, which I will discuss below.
Public Interface IAction
Sub DoThis(a As Integer)
End Interface
[Code]....
This is related to WCF, where one needs to provide to CreateHost a single class, which implements all interfaces required for the end points. In this scenario, ActionDispatcher is such a class, and IAction is one of the many interfaces to be implemented.
My vision is to avoid implementing IAction in ActionDispatcher manually, but have some sort of registration mechanism, where I can say, that ActionDispatcher must implement interfaces IAction, IDoing, INoAction, etc - and have the dispatching methods generated for me.
MSDN says, that any class is compatible with any interface, so I don't need to declare "Implements" in the ActionDispatcher. But I still need to implement the interface and connect the implementing method to the interface definition, so WCF can find it when needed.
The closest thing I found is probably the Automatic Interface Implementer, but it (1) creates a new type, (2) adds dummy methods.
I has also tried to understand CodeCompileUnit class, but so far couldn't see the relation to what I need.
C# - Abstract Class Over Interfaces In ADO.Net Environment
May 13, 2010I am developing a web app but is not satisfied with is architecture that I am following. The architecture is plain old conventional 3 tier architecture. What i want is follow some design pattern or architecture that will be help me in decoupling my code.I have idea about MVC and MVP architectures for Web App but i need different from that. I want to use OOPS concepts using abstract classes and interfaces, polymorphism etc in my app but not MVC and MVP. I dont know why?
View 2 RepliesImplementing A C# Interface In A VB Class?
Oct 28, 2010I am working on a plugin architecture and after some reading I have settled on one. The host class will be implemented in C# as well as some of the plugins for that host. The issue I am having is that some of my team uses VB.net. So the question, is it possible to implement a C# (plugin)interface in VB, such that when it is dynamically loaded into the host program it will have the methods required by the interface.
View 1 RepliesImplementing Class With Chain Of Inheritances
May 30, 2009Usually, if I make a class that has an implementation and also inherits a class with same method signatures, then I do not need to manually add implementation code. For example, if I create a class that inherits List(of Double) and Implements IList(of Double), then I do not need to add any code to make this compile, since the program realizes that the inheritance covers all the methods of the implementation. (Even though VB will auto-generate methods you can remove them no problem).
Now I'm trying do to something more complicated, using an implementation on top of IList, with a class that has a chain of inheritances, and the program won't accept it. See this example:
Interface ICustomList
Inherits IList(Of Double)
Sub TestSub()
End Interface
Class BaseList
[Code] .....
The final item, CustomList, is not compiling. The program says 'TestSub' must be implemented, but by inheriting BaseList, the class has a TestSub (and it is recognized by intellisense)! All the subs exist, they are functional, so why is the implementation not valid? (I know I can get rid of this error by manually creating an (overloading) TestSub in CustomList and specifying that it is an implementation. However, this should not be necessary since it already exists, and if I am going to be building a chain of classes inheriting each other, this could potentially become time-consuming and annoying.)
Implementing Events In A Base Class?
Nov 15, 2010Consider the following objects:
Public MustInherit Class FileRepository
Public MustOverride Sub SaveStringToFile(ByVal FileText As String, ByVal FilePath As String)
Public Event FileSaved(ByRef sender As Object, ByVal EventArgs As EventArgs)
[code]....
I want my base class to raise the FileSaved event in it's implentation of SaveStringToFile once it's saved the file. However in VB.NET you can't have a derived class raise a base classes event. I suppose I can treat XMLFileRepository_FileSaved as a standard function call and have my SaveStringToFile implementation call it directly?
Implementing Generic IComparer Of Own Class?
Jun 17, 2012I am trying to create a class implementing the generic IComparer of my own class "Stellungen" (which translates to positions, like on a chess or checkers board).
This is what I got:
Private Class comparer(Of Stellung)
Implements System.Collections.Generic.IComparer(Of Stellung)
Public Function Compare(x As Stellung, y As Stellung) As Integer Implements System.Collections.Generic.IComparer(Of Stellung).Compare
End Function
End Class
Problem is: inside the function I have no access to any fields of my class. If I start off with x. Intellisense will only give me .Equals, .GetHashCode - the methods you get on a type but not on an instance. Visual Studio 10 also highlights this, in the definition of the function the bits "x as Stellung" and "y as Stellung" are written in light blue, meaning it is a type and not an actual object. How do I access the things I want to compare inside my class?
Implementing IList (Of T) In Generic Class
Jun 26, 2009I am creating a generic class that is Implementing IList(Of T) which requires that I implement the GetEnumorator of both IEnumerable(Of T) and IEnumerable. When looking at the members of IList(Of T) I see only one GetEnumorator function, yet it implements IEnumerable(Of T) and IEnumerable. How can I use one function to implement both interfaces when the function definitions only vary by return type?
View 8 RepliesImplementing Singleton In Parent Class?
Nov 18, 2009implement singleton in a parent class. Infact what I want is that All the childs etc. should use same instance of the parent.
I have implemented singleton, Changed the scope of parent class's constructor to "Protected". But in the application when ever the new child's constructor is called i.e. "Dim abc as New Ch1()" the constructor of Parent is called (as it is Proctected and can be access from child). Which is undesired behaviour.
Errors On Class When Implementing A Specific Interface
Feb 3, 2011In some DLL, I have an interface defined like this (shortened code):
Public Interface wsIInvoice
''' <summary>
''' Perform plugin specific actions for a given memberhip invoice that is processedin an incasso batch, and return success result.
[Code].....
The DLL implementing the interface has a reference to the one defining it. And the defining DLL is imported.
I'm doing exactly the same thing in another DLL, and there VS does not complain.
Forms :: VB With Implementing A Class In Form Code?
May 8, 2009I am having trouble with this project I am working on. I am a beginner to vb and have some background in access databases. I will attach my am doing an inventory project. When you execute the form, a main form pops up that allows you to choose Production or Inventory. My issue is with the Production. In the production form that pops up after clicking Production, there are text boxes to be filled out by the user based on the production run.plementing a class that will give the box count based on the box type entered. I have to use a class based on the project requirements.
Basically to calculate the usage, enter in a random number for Pods Produced, then enter in a box type (which is A box, B box, C box, D box, Master Case). I want the Public Class Box Count in the code to be able to be placed in the production form's main class code and calculate the box count based on the box type entered. If A box, box count should be 50. If B Box, box count should be 100, If any other box is typed in, the box count should be 150
Implementing Cell Class That Has Value Property Of Different Types
Jan 27, 2010I am trying to design a table type structure that contains rows and cells. I intend the cell class to have a value property. I'm trying to work out how I can create a value that can return some defined different types e.g integer, single, date, string. I'd like the cell value to be strongly typed, but I am unsure how best to get this working.
My thinking in code so far:
Public Class Cell
Private _value as object
Public Property Value as Object // How can I define this so that it return a Type
Get // e.g. integer, string, etc
Return _value
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Does Dispose(disposing As Boolean) Need Implementing For Every Class In A Chain
May 9, 2012I'm trying to work out whether every Class in an Inheritance chain needs an explicit Dispose(disposing As Boolean) method or, if a given Class has neither managed nor unmanaged resources to dispose of, it can be skipped for that Class - even if a latterClass does require a Dispose method to dispose of mananaged or unmnaged resources?
Here's two examples:
Public Class BaseClass
Inherits Component 'Component has already implemented IDisposable
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How To Auto-insert A Code Snippet When Implementing Interface Like When Implementing IDisposable
Aug 10, 2010Is it possible to automatically insert a Code Snippet when an interface is implemented? If so, how do you do it? I am looking for something similar to when you implement IDispoable in VB.[code]This will be used by web forms when transfering parameters from one page to the next using Server.Transfer
View 1 RepliesData Migration - Data Migration Two Database In MS SQL 2005
Oct 13, 2010I am doing data migration two database in MS SQL 2005. The records are more than 200000 nearly 300000. I need to query from source database using joins and insert 2 or 3 tables in destination databse. Which way is the best way to do so? I am trying to write a program with VB.NET. If you have sample,
View 1 RepliesVS 2010 Structure Classes So That The User Interfaces Though A Single Class While The Supporting Classes Are Hidden From Their View?
Jun 13, 2012How 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.
Migration From .NET 4.0 To .NET 3.5
Oct 24, 2011I have developed an application using .NET 4.0 Framework, now i want to migrate to .NET 3.5 Framework.
When i change the Framework in advance compile option and run the application it gives me the following error. how can i over come this....
Migration From Vb6 To .NET?
Jun 22, 2010I have made the dreaded (but forced) change from vb6 to .NET.
View 1 RepliesMigration Of VB To .net?
Jan 19, 2009Any program written in Vb 6.0 Is there any free source code available to convert vb code to vb.net?
View 3 RepliesMigration From VB6 To .NET 2008?
Apr 23, 2010I'm going to convert VB6 code to vb.NET 2008. Please advise me What is the best way to convert the code. My VB6 system used following comp.
View 3 RepliesVB To C#.Net Migration Project?
Oct 22, 2009I am working on a VB to C#.Net migration project. Has anyone used a tool called CSharpener to convert VB.Net code to C#? What is your experience with this tool? How much code does this tool migrate & how much is the rework?
View 1 RepliesMigration - Convert The Code?
Apr 26, 2012I got a chance to work in the migration project(VB to VB.NET).I was confusing in the RecordSet functionality.In our project we are taking the DataReader according to the scenario.But in the Looping cases like dsr.EOF.
Dim recordset As dao.RecordSet
If recordset .EOF Then
' ' msgbox "Please enter some number ", vbOKOnly, "Number Not Found"[code].....
How to convert this into VB.NET?Either we need to write If Not reader.Read or If reader.Read.
Asp.net - Data Migration In Sql 2005?
Feb 23, 2009In my Live sql database ,I have to change the date value from (date, month ,year) to date. Now there is 100 records with the date as date,month ,year(3 Fields).iF I change directly to date Field all the datas in the 3 field of those 100 records will automaticly change to a default date and original dates will disappear.What should i do to migrate all my datas safely
View 2 RepliesCalling All VB6, VBA, SQL Migration Experts Out There?
Jul 21, 2009I'm working on a project trying to migrate data from MS Access to CRM(Sales force) online web services database. Have you any ideas how this process can be done? Also, if you know of any VBA or SQL code or online sites that can help me with coding this migration?
View 2 RepliesMigration From MS Access To SQL 2008 In Vb6.0 With DAO
Mar 10, 2010I migrate a vb application from MS Access to SQL Server 2008 using DAO Connectivity.[code]My question is this Is there any way to just change connection from mdb to SQL 2008 without changing in code..
View 9 RepliesVB To .NET Copy File Migration?
Apr 26, 2011I'm migrating VB code to VB.Net and I can not figure out why my files are not copying to there new folder. Here is the old VB code below:
Public Sub FileTransferDoneImage(ByVal FilePath As String)
OnlyFileName = GetFileName 'Get only filename
OnlyPath = GetPathOnly(FilePath) 'Getting only the path
[code]....
The message box shows the correct path/file, but the files are not copying?