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Type Conversion

How can I convert a string to a different type based on another string or
other variable?

For instance, instead of
Dim i as Integer

i = ctype("1000", Integer)

I would like to do

Dim i as Integer

i = ctype("1000","Integer")

In other words the type conversion would be done programmatically, rather
than specified in the code.

In old VB the 'types' had values (like Integer =3, Long = 4, etc). Is there
something similar in .NET?

TIA
--

Alphonse Giambrone
Email: a-giam at customdatasolutions dot us

Nov 18 '05 #1
7 1683
use a switch() statement and ctype() accordingly

--
Curt Christianson
Owner/Lead Developer, DF-Software
www.Darkfalz.com
"Alphonse Giambrone" <NO**********@example.invalid> wrote in message
news:u%****************@TK2MSFTNGP11.phx.gbl...
How can I convert a string to a different type based on another string or
other variable?

For instance, instead of
Dim i as Integer

i = ctype("1000", Integer)

I would like to do

Dim i as Integer

i = ctype("1000","Integer")

In other words the type conversion would be done programmatically, rather
than specified in the code.

In old VB the 'types' had values (like Integer =3, Long = 4, etc). Is there something similar in .NET?

TIA
--

Alphonse Giambrone
Email: a-giam at customdatasolutions dot us

Nov 18 '05 #2
Alphonse,

You could do this:

Dim i As Integer = CType("1000", System.Type.GetType("System.Int32"))

Where:
System.Type.GetType([Type Name As String])

--
Sincerely,

S. Justin Gengo, MCP
Web Developer / Programmer

Free code library at:
www.aboutfortunate.com

"Out of chaos comes order."
Nietzche
"Alphonse Giambrone" <NO**********@example.invalid> wrote in message
news:u%****************@TK2MSFTNGP11.phx.gbl...
How can I convert a string to a different type based on another string or
other variable?

For instance, instead of
Dim i as Integer

i = ctype("1000", Integer)

I would like to do

Dim i as Integer

i = ctype("1000","Integer")

In other words the type conversion would be done programmatically, rather
than specified in the code.

In old VB the 'types' had values (like Integer =3, Long = 4, etc). Is there something similar in .NET?

TIA
--

Alphonse Giambrone
Email: a-giam at customdatasolutions dot us

Nov 18 '05 #3
Your question doesn't make sense as stated. What exactly are you trying to
accomplish? What is your requirement?

--
HTH,
Kevin Spencer
..Net Developer
Microsoft MVP
Big things are made up
of lots of little things.

"Alphonse Giambrone" <NO**********@example.invalid> wrote in message
news:u#**************@TK2MSFTNGP11.phx.gbl...
How can I convert a string to a different type based on another string or
other variable?

For instance, instead of
Dim i as Integer

i = ctype("1000", Integer)

I would like to do

Dim i as Integer

i = ctype("1000","Integer")

In other words the type conversion would be done programmatically, rather
than specified in the code.

In old VB the 'types' had values (like Integer =3, Long = 4, etc). Is there something similar in .NET?

TIA
--

Alphonse Giambrone
Email: a-giam at customdatasolutions dot us

Nov 18 '05 #4
Thanks, that would work, but I thought there should be a more compact way.
It is really not a necessity, just that I feel I am missing something.
--

Alphonse Giambrone
Email: a-giam at customdatasolutions dot us
"Curt_C [MVP]" <software_AT_darkfalz.com> wrote in message
news:%2****************@TK2MSFTNGP12.phx.gbl...
use a switch() statement and ctype() accordingly

--
Curt Christianson
Owner/Lead Developer, DF-Software
www.Darkfalz.com
"Alphonse Giambrone" <NO**********@example.invalid> wrote in message
news:u%****************@TK2MSFTNGP11.phx.gbl...
How can I convert a string to a different type based on another string or other variable?

For instance, instead of
Dim i as Integer

i = ctype("1000", Integer)

I would like to do

Dim i as Integer

i = ctype("1000","Integer")

In other words the type conversion would be done programmatically, rather than specified in the code.

In old VB the 'types' had values (like Integer =3, Long = 4, etc). Is

there
something similar in .NET?

TIA
--

Alphonse Giambrone
Email: a-giam at customdatasolutions dot us


Nov 18 '05 #5
Thanks Justin,

That is the type of statement I am looking for, but it does not work.
Error is, System.Type.GetType is undefined.

--

Alphonse Giambrone
Email: a-giam at customdatasolutions dot us
"S. Justin Gengo" <sj*****@aboutfortunate.com> wrote in message
news:ud**************@tk2msftngp13.phx.gbl...
Alphonse,

You could do this:

Dim i As Integer = CType("1000", System.Type.GetType("System.Int32"))

Where:
System.Type.GetType([Type Name As String])

--
Sincerely,

S. Justin Gengo, MCP
Web Developer / Programmer

Free code library at:
www.aboutfortunate.com

"Out of chaos comes order."
Nietzche
"Alphonse Giambrone" <NO**********@example.invalid> wrote in message
news:u%****************@TK2MSFTNGP11.phx.gbl...
How can I convert a string to a different type based on another string or other variable?

For instance, instead of
Dim i as Integer

i = ctype("1000", Integer)

I would like to do

Dim i as Integer

i = ctype("1000","Integer")

In other words the type conversion would be done programmatically, rather than specified in the code.

In old VB the 'types' had values (like Integer =3, Long = 4, etc). Is

there
something similar in .NET?

TIA
--

Alphonse Giambrone
Email: a-giam at customdatasolutions dot us


Nov 18 '05 #6
Sorry for the confusion, Kevin.
I know there are other ways to do this, but it is bugging me now.
Simplistically, I want to have a database table with 3 fields.
ItemField (text)
ValueField (text)
TypeField (could be integer, text or whatever is necessary)

ItemField would contain the description of a value to lookup (for example
"LastDatabaseCompact").
ValueField would contain the associated value as a string (for example
"1/4/2004").
TypeField would indicate the type of data in ValueField.

I would then have a function that could look up the value in ValueField for
the requested ItemField and return the result as the appropriate type. In
this example a date.
Skipping all the db connectivity, etc.
It would be something like
Return Ctype(ValueField, TypeField) '(this obviously would not work as
is).

--

Alphonse Giambrone
Email: a-giam at customdatasolutions dot us
"Kevin Spencer" <ke***@takempis.com> wrote in message
news:eS**************@TK2MSFTNGP09.phx.gbl...
Your question doesn't make sense as stated. What exactly are you trying to
accomplish? What is your requirement?

--
HTH,
Kevin Spencer
.Net Developer
Microsoft MVP
Big things are made up
of lots of little things.

"Alphonse Giambrone" <NO**********@example.invalid> wrote in message
news:u#**************@TK2MSFTNGP11.phx.gbl...
How can I convert a string to a different type based on another string or other variable?

For instance, instead of
Dim i as Integer

i = ctype("1000", Integer)

I would like to do

Dim i as Integer

i = ctype("1000","Integer")

In other words the type conversion would be done programmatically, rather than specified in the code.

In old VB the 'types' had values (like Integer =3, Long = 4, etc). Is

there
something similar in .NET?

TIA
--

Alphonse Giambrone
Email: a-giam at customdatasolutions dot us


Nov 18 '05 #7
Hi Alphonse,

You are getting an object is undefined error because CType does not allow
variables or calculations within the type parameter. The Visual Basic
Language Reference - CType Function documentation shows this:

typename
Any expression that is legal within an As clause in a Dim statement, that
is, the name of any data type, object, structure, class, or interface.

We are not allowed to dim a variable as type System.Type.GetType(...). The
same thing applies to the type parameter of the CType function.

I think you need to use a Select Case statement, as mentioned earlier.

Thank you, Mike
Microsoft, ASP.NET Support Professional

Microsoft highly recommends to all of our customers that they visit the
http://www.microsoft.com/protect site and perform the three straightforward
steps listed to improve your computers security.

This posting is provided "AS IS", with no warranties, and confers no rights.
--------------------
Reply-To: "Alphonse Giambrone" <NO**********@example.invalid>
From: "Alphonse Giambrone" <NO**********@example.invalid>
References: <u#**************@TK2MSFTNGP11.phx.gbl> <ud**************@tk2msftngp13.phx.gbl> Subject: Re: Type Conversion
Date: Mon, 5 Jan 2004 16:00:14 -0500
Lines: 72
X-Priority: 3
X-MSMail-Priority: Normal
X-Newsreader: Microsoft Outlook Express 6.00.2800.1158
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165
Message-ID: <eJ**************@TK2MSFTNGP11.phx.gbl>
Newsgroups: microsoft.public.dotnet.framework.aspnet
NNTP-Posting-Host: ool-4352027f.dyn.optonline.net 67.82.2.127
Path: cpmsftngxa07.phx.gbl!cpmsftngxa06.phx.gbl!cpmsftng xa09.phx.gbl!TK2MSFTNGP08.
phx.gbl!TK2MSFTNGP11.phx.gbl Xref: cpmsftngxa07.phx.gbl microsoft.public.dotnet.framework.aspnet:199830
X-Tomcat-NG: microsoft.public.dotnet.framework.aspnet

Thanks Justin,

That is the type of statement I am looking for, but it does not work.
Error is, System.Type.GetType is undefined.

--

Alphonse Giambrone
Email: a-giam at customdatasolutions dot us
"S. Justin Gengo" <sj*****@aboutfortunate.com> wrote in message
news:ud**************@tk2msftngp13.phx.gbl...
Alphonse,

You could do this:

Dim i As Integer = CType("1000", System.Type.GetType("System.Int32"))

Where:
System.Type.GetType([Type Name As String])

--
Sincerely,

S. Justin Gengo, MCP
Web Developer / Programmer

Free code library at:
www.aboutfortunate.com

"Out of chaos comes order."
Nietzche
"Alphonse Giambrone" <NO**********@example.invalid> wrote in message
news:u%****************@TK2MSFTNGP11.phx.gbl...
How can I convert a string to a different type based on another string or other variable?

For instance, instead of
Dim i as Integer

i = ctype("1000", Integer)

I would like to do

Dim i as Integer

i = ctype("1000","Integer")

In other words the type conversion would be done programmatically, rather than specified in the code.

In old VB the 'types' had values (like Integer =3, Long = 4, etc). Is

there
something similar in .NET?

TIA
--

Alphonse Giambrone
Email: a-giam at customdatasolutions dot us




Nov 18 '05 #8

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