Casting Help Needed

[Brian]

Hello!

What is the proper syntax for casting? For example, how do I change an
Integer in to a String if the variable is called Joe1 and has 20 assigned to
it.

Thanks,
Brian

 

[Carlos J. Quintero [.NET MVP]]

Hi Brian,

The casting operators in VB.NET are DirectCast (if the object is already of
the requested type, such a base or an interface) or CType(when a type
conversion is required), but in your case of strings and integers:

- For conversions to String, you can use the ToString() method:

Dim s As String
Dim Joe1 As Integer = 20

s = Joe1.ToString() ' Notice that this is an overloaded method that can
receive the format as parameter

- For the converse operation, you use the Parse method of integers (with
proper exception handling omitted here):

Dim Joe2 As Integer

Joe2 = Integer.Parse(s)

--

Best regards,

Carlos J. Quintero

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[Cor Ligthert]

Brian,

Just as you like it

mystring as string
mystring = Joe1.ToString
mystring = Cstr(Joe1)
mystring = Ctype(joe1, String)
mystring = Convert.ToString(Joe1)

I use Joe1.ToString

I hope this helps,

Cor

 

[Robin Tucker]

Technically, the example you give isn't called casting:

Dim Joe1 as integer = 20
Dim theString as string

theString = Joe1.ToString ()



..... and back again you can try this:

Joe1 = Integer.Parse ( theString )

 

[Armin Zingler]

What is the proper syntax for casting? For example, how do I change
an Integer in to a String if the variable is called Joe1 and has 20
assigned to it.

That's not called casting. It's a conversion. Casting changes the type of an
expression but does not create a new object. Doing a conversion creates a
new object.

dim Joe1 as integer = 20
dim s as string

s = Joe1.ToString


Armin

 

[Cor Ligthert]

Brian,

I forgot to tell it is converting not casting. In C# the call everything
casting as I do when I am playing with my angle because I never catch a
fish.

Cor

 

[Brian]

No problem...I am using a very good study book that has now asked me to turn
on STRICT TYPING and I am having a devil of a time now with it.

 

[Jay B. Harlow [MVP - Outlook]]

Armin,
| Casting changes the type of an
| expression but does not create a new object.
I need to remember that one!

Hope you don't mind if I use it later...
Jay


| >
| > What is the proper syntax for casting? For example, how do I change
| > an Integer in to a String if the variable is called Joe1 and has 20
| > assigned to it.
|
|
| That's not called casting. It's a conversion. Casting changes the type of
an
| expression but does not create a new object. Doing a conversion creates a
| new object.
|
| dim Joe1 as integer = 20
| dim s as string
|
| s = Joe1.ToString
|
|
| Armin
|

 

[Armin Zingler]

Armin,
| Casting changes the type of an
| expression but does not create a new object.
I need to remember that one!

Hope you don't mind if I use it later...

No, not at all.

Armin

 

[Roger]

That's not called casting. It's a conversion. Casting changes the type of an
expression but does not create a new object.

Yes, it is the same memory space, but interpreted
differently.
And there is something about the size of the two
operands, also. They must either be the same size,
or the 'cast to' can not be more than the 'cast from'.
Roger