I want to use this Structure in multiple .vb files within my project:
Structure MyStruct
Dim Name As String
Dim Good As Boolean
End Structure
If I define it in one file, the other files can't use it. How do I define it globally?
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.
I am creating an Add-In that I want to create classes and forms based on a database structure. I can't find any information anywhere on how to programatically add code to classes. I know I can write out the files and add them to a project, but that would limit what I can do in the future. I would like the possibility to update a function in the future which would be impossible writing out a file and loading the whole thing back in. It would destroy any modifications made to the class, and since this Add-In will only be creating a framework, there will usually be modifications.
I got this line from the macro recorder:DTE.ActiveDocument.Selection.text = strDACode
But I like to keep Option Strict on, and this is late bound according to the IDE. There seems to be very little help on the IDE and how to use it creating Add-Ins. If I overlooked something please point me there, but I can find nothing. I don't know if it can be done, but I was able to do it in an Add-In for VB6.I would also like to add controls to a form, so if anyone can point me somewhere where it explains
I downloaded a .net component that I would like to make consumable by COM clients. This component allows one to create a DXF file (Cad drawing). The problem is that the component is composed of quite a few class files, some inherit another. All the examples I found only show one file no namespaces etc. [Code]
View 1 RepliesI have created a read-only property(name) in class1. How can I use this name property in class2?
Public Class Class1
ReadOnly Property name() As String
Get[code].....
Can I directly carry this name variable value into class2?
I am wondering the best way to store an object in memory that is used in a lot of classes throughout an application. We have multiple databases, 1 per customer. We also have a master table and each row is detailed information about the databases such as database name, server IP it's located and a few config settings.
I have an application that loops through those multiple databases and runs some updates on them. The settings I mentioned above are updated each loop iteration into memory. The application then runs through series of processes that include multiple classes using this data. The data never changes during the processes, only during the loop iteration.
The variables are related to a customer, so I have them stored in a customer class. I suppose I could make all of the members shared or should I use a singleton for the customer class? I've never actually used a singleton, only read they are good in this type of situation. Are there better solutions to this type of scenario? Also, I could have plans for this application to be multithreaded later.
I'm a long-time developer but semi-new to Visual Studio .NET and VB.NET. I've been working on an application for months, written in Visual Basic .NET. It's a rewrite of a popular IDE of mine that's originally written in assembly. What I'm trying to do in VB.NET is have multiple TabPage classes that inherit from TabPage, ofcourse, but each having it's own methods for common functions like Cut, Copy, Paste, etc. so that when I call tab.Cut(), the TabPage class for the currently-selected tab is the one used. In each custom TabPage class, I'll have a New instance of the main control that goes in that tab.
I think there would be a problem when I loop through the TabPages since the Foreach routine can only use one object type, as far as I know (TabPage).Currently I have only one custom TabPage class called Page that obviously inherits from TabPage, has additional properties and also methods that allow editing functions for whatever control is selected to be displayed for the tab. For example, when I call the New constructor, I supply the editor type as a parameter: dim tab as New Page(HEX_EDITOR).I have edit controls such as text, syntax editor, hex editor, bitmap editor, HTML editor, HTML browser. This means I get a new instance of all of those controls each time a new Page is added to the TabControl. I'm currently disposing of the unneeded editors depending on which editor is the one needed. The scheme is not preferred but it works great for now as I work on other areas of the IDE.
[Code]...
I have one class with <Serialize> attribute called Tree. And Tree class has an arraylist of TreeNode classes. Is it possible to use Soap to convert the Tree class and arraylist of TreeNode classes to one xml file or binary file? If it is possible, do i need to use <Serialize> attribute on TreeNode classes too? If not, what should i do then?
View 3 RepliesIn a project of mine I'm currently doing this:
[code]...
all classes inherit docMain and addTemplateToList( X ) adds x to a List(Of docMain). Now my question is: Is there a better way to do what's done in the code sample? I thought of something like:
[code]...
Is this somehow possible in VB.net (Reflection?)?
I am integrating two disparate data sources where each value may depend on one or more other derived elements.This app runs as a windows service.Currently all my code is in a single class.I am upgrading to 2010 and wondering if best practices would be to break out my functions into multiple classes - there are over 100 data elements that need to be constructed. The following is an example of a couple derived items:(Is there a better way to do this - when complete I will pass this app off to someone else to support and want to make sure I give them the best beginning.[code]......
View 2 RepliesIs it possible to have multiple classes in a namespace and be able to reference the functions within the clases if the Major class is instaniatated from another class?? for instacnce:
Namespace Database
Public Class Data
Public Class Prepare
[code]....
I'm still teaching myself how to bind and use observable collection. One problem that I'm a little confused on is binding multiple classes/observable collection to one page. In other words, if I have a PersonName class and a AnimalName class, I have to create two separate observalbe collections for each? How would I set the datacontext when a page only allows one?
[code]...
Now If I add another class, how would I combine the two on the binding part and collection part.
Okay, say I have a class named "ChannelList", and it raises an event named "FoundChannel"
But what I'M wanting to do is create multiple classes of different names that use that class, but I want to have all of the "FoundChannel" events be handled under one single sub routine?
I want to be able to incorporate some constant definitions and enum types in multiple classes of mine.Something akin to including a header file in C++. How do I do this best in VB.NET? I'm having a hard time because the only way I can see to do it is to inherit a class with the definitions in it but there is no multiple inheritance in vb.net so I am having some issues with that.
View 6 Replieswhile making my irc bot i need to send many different irc commands such as join channel, change mode, kick user message, topic channel message and so on. All these commands are currently process individually in a public sub on the irc connection thread.
Public Sub Write(ByVal command As String)
_streamWriter.WriteLine(command)
_streamWriter.Flush()
[Code]....
Would you have a load of public sub's to handle each or maybe something else?
I'm developing a new functionality for web site project with VB.NET default language in VS 2008. As my preferred language is C# I create subfolder for C# code in the App_Code folder and add appropriate codeSubDirectories element to web.config file. The problem is that I can't refer VB.NET classes in my C# code. All VB.NET classes and structures are placed in global namespace in the App_Code. But even if I place some VB.NET class in the same namespace I've use for my classes in C#, I still can't use them.
View 2 RepliesHow to manage multiple tables with the same structure. However, due to the craptastical nature of VB, the solution doesn't really work. It specifically doesn't work because VB.NET requires the implementation of each method/property in the interface to be explicitly declared.
As for the problem that I'm really trying to solve, here it is:
I have many lookup/domain tables in the database that all have the same structure.
The items in these tables are typically used for drop downs in the interface.
I would like to avoid a bunch of boilerplate repository methods to retrieve the contents of these tables (one method per table really sucks when you have 40 tables).
I am not using the One True Lookup Table anti-pattern and this is not an option.
I have created two structures, one named "Product" and the other named "Item". These structures are quite similar but are at the same time quite different from each other. The structure definitions are as follows. Ultimately, I declare arrays in my containing class which access these structures as a type. Their declaration: "Products() as Product" and "Items() as Item". All has been fine and dandy until one day, I go to change the items Enabled() values, and something happens. Not only does it change the Items(index).Enabled(index) value, it does it on the corresponding Products(index).Enabled(index) value, even though it was never specified to do so. Also, nowhere in my coding have i defined this sort of thing to occur. It is rediculous, because I watch it happen. I turn on the watch window, and debug one step at a time, and every time, I watch the Item line step, I look down at the arrays of products and items, and both values have changed. How do I get this to stop, and only change the Item.Enable value??
<Serializable()> _
Public Structure Product
Public Name As String
[code]......
I am enrolled in a college course using Visual Basic 2010 Express.My current assignment calls for the following:Create a small program that allows a user to enter the total amount of purchases for the purpose of calculating rewards points based on the purchase totals vs. their membership level of basic, standard and premium.The user selects their membership level via 3 radio buttons, basic, standard or premium.
The total of purchases and their rewards points depend on the membership level. Example, if you are a basic customer and your total purchase is under $75, you receive 5% in rewards points (70 x 0.95). Additionally, if the total is between $75 and $149.99, you receive 7.5% rewards.Here is what I have so far, but I am getting errors on the ElseIf statements:
If basicRadioButton.Checked = True And totalTextBox.Text < 75 Then rewards = total * 0.95
ElseIf basicRadioButton.Checked = True And totalTextBox.Text > 74 AndAlso totalTextBox.Text < 149.99 then rewards = total * 0.925
ElseIf basicRadioButton.Checked = True And totalTextBox.Text > 150 Then rewards = total * 0.9
[code]....
I would like to know how will performance go when I instantiate multiple classes in one form.e.g
Public Class frmClass
Dim obja As New ClassA
Dim objb As New ClassB
[code]....
We are developing a webservice for a client. We are not supose to throw SoapExceptions, so instead, we catch every exception server side, and return a custom Exception class.
Public Class Order
...
End Class
[Code]....
The problem now is, that since my webmethod is returning the type [Object]. The wdsl that is generated does not contain the order, or the exception.
I can change the [Object] to [Order] Or [MyException], but only one of them is generated in the wsdl.
I want both the MyException type and the Order type in my wsdl, but i just cant get it working.
I am in college taking computer programming and we are now in multiple classes and forms. It was very hard to get ahold of at first but now that I understand it a bit better I am curious as to how often in a professional enviornment do developers create multiple classes for a project? Besides the use of custom functions what else is beneficial for it?
View 4 RepliesI'm using a Listview in VirtualMode, so I can 'add' a lot of files almost instantly. A Listview in VirtualMode does not allow sorting, so I need to sort the data myself. The data is stored as a List of Structure (it's faster to load than a List of ListViewItem). The code below works fine, but I need to sort based on multiple variables in the Structure. Code:
View 2 RepliesI am using a structure array with multiple member names with 2 types. My question is can you single out one of the member names and add its total? kinda like this...
HTML Code:
structure structureName
dim a as string
dim b as double
dim c as double
[code].....
I will attach a pic of the errors I have left to resolve. And in addition, when I run it, it doesn't put the CustName and AcctNo in the ListBox. I could attach more code to get a bigger picture of what I'm trying to do. Here is where I have the errors on the list:
[Code]...
2. FunctionLayer -deals with Common Operations which get results from DataLayer and return results to Forms.3. User - deals with User. (For Reusing the User Class in other projects, i have separated this class)Here in Class2 - I have an instance of Class1( ie., DataLayer) for DB Operations.imilarly in Class3- I have an instance of Class1( ie., DataLayer) for DB Operations.Now in my form, If i create Instance of Class2. But When I need user functionality in this form, I have to create an instance of Class3 to this form.
View 6 RepliesMy VB project is large enough that it requires several files. It was originally developed as a Console App and I created each file as a MODULE. All modules could use subroutines, data structures and constants from other MODULES and everything worked fine. I needed to add basic windowing to the app and this required that the app be converted from a Console App to a Windows Forms App. The main window is Form1 which is not a MODULE but a CLASS. The problem is that some MODULE based functions cannot access subroutines, data and constants that are defined within the CLASS Form1 unless they are incorporated into the CLASS file and this makes the CLASS file very large. If I add a new Class file to the project, it also cannot interoperate with Class Form1 in the same way that multi-MODULE code interoperates.
How does one spread CLASS code across several files and still allow it to interoperate as if it were in a single file? Alternatively, how does one create several CLASS files that operate the way multiple MODULE files operate.I am sure that there are all kinds of best practices that I am violating but the goal to to get some prototype software working and interfaced to some lab equipment.
I am having this strange thing happen where I have a Module that contains multiple classes in my project. In the Solution Explorer, the module shows up as a Windows Form and if I double click on it to open it, it tries to open the Form Designer. What could be causing VS to think that it is a Windows Form instead of a module?
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We have migrated our Vb6 application to VB.NET using a third party tool. Now we are in a process of Refactoring and introducing object oriented concepts in the application.
In VB6, we were using structures in many places. As a part of introducing object oriented programming,
1. is it a good idea of changing all Structures to Classes? or Is there a concept of "Generic Structure" similar to Generic collections, Generic classes?
2. Can some one guide me any source containing guide lines or best practices for applications that are migrated to VB.NET from VB6 and implementing object oriented programmaing.
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.
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