Difference between Cint and Convert.ToInt32 ?

21 Jul 2006 9:14 PM

Rich

Hello

txtID.Text contains a 6 digit Integer number with no decimals, no chars...

Dim j As Integer = Cint(txtID.Text)

or

Dim j As Integer = Convert.ToInt32(txtID.Text)

Is there any difference between these 2 statements? Is one statement more
correct than the other?

Thanks,
Rich

21 Jul 2006 10:23 PM

Branco Medeiros

Rich wrote:
<snip>

> txtID.Text contains a 6 digit Integer number with no decimals, no chars...
>
> Dim j As Integer = Cint(txtID.Text)
>
> or
>
> Dim j As Integer = Convert.ToInt32(txtID.Text)
>
> Is there any difference between these 2 statements? Is one statement more
> correct than the other?

<snip>

Well, there *is* a difference:

any the following literals would raise an exception if Convert.ToInt32
was used instead of CInt:

? CInt("123.456")
? CInt("123,456")
? CInt("&h123")

In other words, CInt (when passed a string) performs more work than
Convert.ToInt32.

Regards,

Branco

21 Jul 2006 11:34 PM

Rich

Thanks. I guess I will stay with Convert.ToInt32.

Rich

Show quoteHide quote

"Branco Medeiros" wrote:

>
> Rich wrote:
> <snip>
> > txtID.Text contains a 6 digit Integer number with no decimals, no chars...
> >
> > Dim j As Integer = Cint(txtID.Text)
> >
> > or
> >
> > Dim j As Integer = Convert.ToInt32(txtID.Text)
> >
> > Is there any difference between these 2 statements? Is one statement more
> > correct than the other?
> <snip>
>
> Well, there *is* a difference:
>
> any the following literals would raise an exception if Convert.ToInt32
> was used instead of CInt:
>
> ? CInt("123.456")
> ? CInt("123,456")
> ? CInt("&h123")
>
> In other words, CInt (when passed a string) performs more work than
> Convert.ToInt32.
>
> Regards,
>
> Branco
>
>

22 Jul 2006 12:22 AM

Herfried K. Wagner [MVP]

"Rich" <R***@discussions.microsoft.com> schrieb:
> txtID.Text contains a 6 digit Integer number with no decimals, no chars...
>
> Dim j As Integer = Cint(txtID.Text)
>
> or
>
> Dim j As Integer = Convert.ToInt32(txtID.Text)
>
> Is there any difference between these 2 statements? Is one statement more
> correct than the other?

Not really. I'd try to avoid 'Convert.ToInt32' and use 'CInt' or
'Integer.Parse' instead.

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://classicvb.org/petition/>

22 Jul 2006 4:50 AM

Cor Ligthert [MVP]

Rich,

Yes there are,
Convert.ToInt32 is longer and it converts to Int32
CInt converts to Integer what should be represent the best internal format
to use by the computer. Unlucky enough has a big lobby changed the last for
the 64bit version and are there extra instructions needed now (they are fast
but still take time).

Cor

Show quoteHide quote

"Rich" <R***@discussions.microsoft.com> schreef in bericht
news:8BE53B5A-DA04-4844-B911-DC42E14797C0@microsoft.com...
> Hello
>
> txtID.Text contains a 6 digit Integer number with no decimals, no chars...
>
> Dim j As Integer = Cint(txtID.Text)
>
> or
>
> Dim j As Integer = Convert.ToInt32(txtID.Text)
>
> Is there any difference between these 2 statements? Is one statement more
> correct than the other?
>
> Thanks,
> Rich