I think my problem is easy to solve. I developed an interface called "Animal". My programmers created classes for "Dog", "Cat", and "Horse" Later I want to let the user create an animal in a Windows form. How can I get my annimals to appear in the combo for selecting one of them? Each animal has it's own DLL. If tomorrow a new animal is developed, the combo should present the new value.
View 2 Repliesso far i got
code
For Each item As Reflection.FieldInfo In GetType(NameSpace.ClassWithNestedClasses).GetFields
rtfAppend(item.Name & ":" & Tab & item.GetValue(Me))
Next
For Each item As Reflection.PropertyInfo In GetType(NameSpace.ClassWithNestedClasses).GetProperties()
[code]...
which gets me the simple string vars and properties of my top class, but how can i apply this to loop through all sub classes and get there vars and props?
I have a class which has a variety of details, as follows:
Vehicle Name
Vehicle Address
VEHICLE Percentage: 10
I need to somehow use an Interface for another version, SpecialVehicle.
Special Vehicle has a different Percentage, for example 15.
How can I integrate that in an interface? I just don't understand them?
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 may be misunderstanding this but on MSDN i believe it says that it is good practice to implement the Dispose destructor in every class you write. should i (do you) really implement the IDisposable interface with every class i write? also, is the proper syntax for implementing an interface to put the "Implements" keyword on the line after the "class" declaration? i put it on the same line as "class" and I got an error.when coding the method implemented by the interface, is it mandatory to follow this syntax, as an example: Public Sub Dispose() Implements System. IDisposable. Dispose.
View 3 RepliesHow do I limit an Interface when defining it? What is the correct technical term for what I am describing?For example, I want MyInterface to only be implemented for objects that implement IList(Of T) and ICollection(Of T).
View 5 RepliesI'm trying to create a base interface for a class of mine that uses generics. However, I cannot figure out how to declare a property of the interface when its type won't be defined until the class is initialized.
To clarify, consider List(of T), which according to msdn, implements IList (among other things). Note that IList is not the same as its generic counterpart IList(Of T). So that mean any List(of T) can be converted to IList, which simply returns an object for its items. That's what I want to do with MyClass(of T), be able to cast it as IMyClass regardless of what T is.
But when I try such as:
Interface IMyClass
Prop A as Object
Class MyClass(of T) Implements IMyClass
Prop A as T Implements IMyClass.A
I get a signature error for the last line, even though object is broader than T. What am I doing wrong, or how exactly did Microsoft manage to make List(of T) implement IList?
So 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.
[Code]...
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.
View 2 RepliesHow 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.
Here is some example code of what I mean:
vb
Public Class Form1
Private Sub Button1_Click(ByVal sender as Object, e as systemEventArgs) Handles Button1.Click
[Code]....
I've created a class and put its objects into an Arraylist.
Here is the class:
Public Class ItemColl
Public TBPid, PAid As Integer
Public Sub New(ByVal _TBPid As Integer, ByVal _PAid As Integer)
[Code].....
I know I can override ToString(), but It would take a lot of time to change existing code with ".ToString()".
I m trying to raise Click event of Textbox explictly but I m getting "Derived classes cannot raise base classes" error.[code]....
View 1 RepliesAren't arrays of object enumerable?Look for the comments in the code
Public Class AddressCollection
Inherits System.Collections.ObjectModel.Collection(Of AddressType)
Public Sub New()
End Sub
[Code]...
I'm looking for some code (C# or VB.NET preferred) to iterate through all folders in an Outlook mailbox and return the names of those folders. I'm not looking to pop up the Outlook folder dialog, but rather to return the folder names in a given mailbox from outside Outlook.
View 2 RepliesI'm writing a little Database administration program.It works fine if you give the db, but not when you don't know which db is installed.How can I enumerate all running databases?
View 4 RepliesI want to enumerate all the directories in C: and also at the end of it I want the size. Now, I can enumerate the directories but I have no idea how to get the size.
I have the code here but everytime I try and add My.Computer.FileSystem.GetFileinfo it bombs out saying that I have not expressed it. I suppose I need to add a variable for my.computer.filesystem.getfileinfo but how do I add two variables in one for each statement.I guess I could declare it outside the "for each" statement.[code]...
What is the fastest way to enumerate the letters of the alphabet? Anything built into the framework?[code]...
View 3 RepliesI need to enumerate a list of OU (Active Directory) and output in treeview.
View 1 RepliesI wrote some code to add the Name and Value to Combobox.
dt = New DataTable
dt.Columns.Add("Name")
dt.Columns.Add("Value")
[Code]....
Now i want to enumerate all the ValueMemer (11,22,33,44) and all the DisplayMember (AA,BB,CC,DD) from Combobox1, how to do?
I want to create a form almost exactly like the database properties page that appears in SQL Server Management Studio when the properties of a SQL CE database is selected. Basically, the form has page options that show general properties in a propertygrid, a shrink and repair page option, and an option to set the password. Does Microsoft have some code posted on how they show the properties page of a sql ce database?
View 5 RepliesQuickest way to enumerate the alphabet in C#
Because I need to get all the characters of the alphabet OF AN ARBITRARY (variable) LANGUAGE, and that in the correct ordering sequence.
How can I do that without knowing the alphabet of every possible culture/language? System.Gobalization.Cultureinfo for example has information on date format, and a sorting method, and codepage info. But not info on the alphabet itselfs. Forthermore 'A' to 'Z' ordering iterating won't do, because German for example has characters such as ÄÖÜ, which are after 'Z' in the codepage numbering, but follow after aou when sorting.
Can I somehow use the codepages to get all the characters, and sort them somehow ? By 'all the characters' I mean all letters, including numbers, but not punctuation marks. And possibly only upper XOR lowercase.
Does anyone know how to enumerate through the set of file attibutes that are part of Windows? How are Unions handled which have a sum of 28 in file attributes?
View 1 RepliesI need to know how many times an Item is repeated in a listbox? I use Listbox1. items. contains(Any string) to determine if this item is existed or not , But I need to know how many times??
View 19 RepliesIm actually using this:
Dim oControl as Control
For Each oControl In Me.Controls
debug.print oControl.Name
Next
the thing its that i doesnt enumerate the child objects for example..
if the form has a tabcontrol, it will spit only Tabcontrol1 but i want to enumerate everything contained in all the form even of theyr childs of other objects.
faster way to enumerate through a directory and sub-folders to gather all the files in the enumeration? This is what I have right now:
Public Shared allFiles() As String
allFiles = Directory.GetFiles(<ServerLocation>, "*.*", SearchOption.AllDirectories)
EDIT: I am enumerating these files from a server location. I don't know if that will change the perspective of this question or not.
I have a class in vb.net, it looks like
public class myclass
Public Const AAA = 111
Public Const BBB = 222
Public Const CCC = 333
End Class
Now i want to get all the values (111,222,333) to an array list (or collection, or whatever) , how to do?
How to enumerate the mapped folders on a fileserver?
View 4 RepliesIn a case where you would like to reset an array of boolean values what is faster, rediming the array or enumerating and resetting the values? I have run some tests and they seem to suggest that a redim is a lot faster but I am not convinced that it isnt a result of how I'm running the tests.
My tests seem to suggest that redim is nearly twice as fast.So could anyone care to comment on which is faster and why? Also would you expect the same result across different languages?
[Code]...
How can I enumerate all files in an online folder?
How can I download multiple files?