Late Binding Issue

  • Thread starter Thread starter Miro
  • Start date Start date
M

Miro

VB 2003 and Im still new to vb, so i hope i can explain this as best I can.

I have a variable defined as such: ( simple example )

Dim AVariableOfSorts(,) As Object = _
{ _
{"Last", "String", 20}, _
{"First", "String", 20} _
}


I had to define it as an object so I can have different variable types all
within the same array.
( unless there is another way to do this )

What im getting is an error "Option Strict On Disallows Late Binding" when
I try to do anything with an array element.

For example
AVariableOfSorts(1, 1) = ""

I would like to keep Strict On on

What am I missing ? or how do I get around this issue?

I beleive I know the difference between binding. - Simply put:
1. Dim X as String is early binding and Dim X as Object ,...
X.GetType.ToString would be late binding and would
take longer during running.

Im not sure what to search for in Help / or Online to help myself out.

Thanks

Miro
 
Miro said:
VB 2003 and Im still new to vb, so i hope i can explain this as best I
can.

I have a variable defined as such: ( simple example )

Dim AVariableOfSorts(,) As Object = _
{ _
{"Last", "String", 20}, _
{"First", "String", 20} _
}


I had to define it as an object so I can have different variable types all
within the same array.
( unless there is another way to do this )

What im getting is an error "Option Strict On Disallows Late Binding"
when I try to do anything with an array element.

For example
AVariableOfSorts(1, 1) = ""

I would like to keep Strict On on
Click to expand...

\\\
DirectCast(AVariableOfSorts(1, 1), String) = ""
///
What am I missing ? or how do I get around this issue?
Click to expand...

Maybe it's better to define a class with properties for the first and second
string and the integer number. Then you can create an array of this type
('Dim Items() As Foo').
 
You can try using an ArrayList

Dim listOfObjs As ArrayList = New ArrayList

listOfObjs.Add("Last")
listOfObjs.Add("String")
listOfObjs.Add("20")

However, I like Herfried's idea better in creating a class for this
information and then having an array (or a strongly typed collection) for
them. It really depends on what you are trying to accomplish.
 
Yes Herfried is right. Go for a class anc collections. Forget about
bidimensional arrays of objects. I have never seen them in a meaningul
..net program.

tommaso

rmacias ha scritto:
 
Ive never used classes in the programming languages ive used.

So that is my next lesson.
I stayed away from the array lists cause I didnt like how all the items have
to be the same "var type "

I just want to store a whole bunch of data in 1 variable with many different
vartypes and change the
variable elements as i need to.

Someone once pointed me on this newgroup to the object, so now im at the
point to use the "object" var
i created and im running into this.

So a class it will be - as long as i can achieve the above posted.
I can always make something like "dim bla(,) as String" and strigify
everything and val it as i need to cause i know
which elements are going to be numeric.
I just didnt think it would be this hard to store different variable types
/ variables all in one array.

So im off to read about classes .... my next post might be about them :)

Thanks.
 
Hi Miro. This is not a poetry.

Classes must be your breath.

Arraylist, Hashtable, Sorted List,
your father, mother and brother.

Comparers your best friends ...

Anyone wants to add more lines ? :)

Tommaso


Miro ha scritto:
 
Believe it or not they arent the easiest thing to grasp.

In theory or on a page or in a book they are fine... but i tell ya
some old languages ive used far too long probably look just as confusing
back.

I will breath Classes this weekend,
and most likely have some questions.

Comparers and friends are still not all that clear either.

M.
 
Miro,

Reading your message is the answer, you should not use a programming
language as VB.Net, C#, C++ or Java.

Just keep it by VB script or JavaScript.

Just my thought reading your message.

Cor
 
I would like to do it all in VB.
Learn it all as one of you would actaully do it in vb.
I knew javascript pretty good back in 99' to about 2002 ... and then i
stopped using it. So Im not sure how much
it has changed since then.

Im fiddling with classes now and I can create a Class and property so im
close ( or i think im close ).
So Im assuming now that I can create property's when im all done I will have
1 Class with 3 properties that will be an array,
that will technically be each element of the array i was trying to create.

M.

ps...
Oh... Herfried K. Wagner... the
DirectCast(AVariableOfSorts(1, 1), String) = "" didnt work, it had the same
issue with late binding or something.
 
Miro,

If you create a class, something as

\\\
Public Class whatever
Private whatevervalue as string
Private whateelsevalue as string
Public property TheFirstValue as string
Get
return whatevervalue
End Get
Set (by value as string)
whatevervalue = value
end set
'The same for secondvalue
End Class
///

Than you can do
Dim myArray as list of (whatever)

all typed in this message so watch typos or other errros.

I hope this helps,

cor
 
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