Convert from double to string

[Marty]

Hi,

If I don't know that my (or any) windows 2k regional setting for the
decimal symbol is the dot (".") and I want to do this:

1- Dim dblOutput As Double
2- Dim strInput As String
3- strInput = "123,8"
4- dblOutput = Convert.ToDoubl e(strInput)

How can I avoid an error at line four ? And get it converted to double
to have this output : 123.8

Thanks a lot!

Marty

[Hermit Dave]

replace , with a .

ie strInput = "123.8"

and you could also use double.Parse(st rInput)

--

Regards,

Hermit Dave
(http://hdave.blogspot.com)
"Marty" <re***@to.forum > wrote in message
news:ycIZc.8717 9$X12.24242@edt nps84...

Hi,

If I don't know that my (or any) windows 2k regional setting for the
decimal symbol is the dot (".") and I want to do this:

1- Dim dblOutput As Double
2- Dim strInput As String
3- strInput = "123,8"
4- dblOutput = Convert.ToDoubl e(strInput)

How can I avoid an error at line four ? And get it converted to double to
have this output : 123.8

Thanks a lot!

Marty

[Cor Ligthert]

Marty,

Maybe you can use this,

If
System.Globaliz ation.CultureIn fo.CurrentUICul ture.NumberForm at.CurrencyDeci m
alSeparator = "," Then
I hope this helps?

Cor

If I don't know that my (or any) windows 2k regional setting for the
decimal symbol is the dot (".") and I want to do this:

1- Dim dblOutput As Double
2- Dim strInput As String
3- strInput = "123,8"
4- dblOutput = Convert.ToDoubl e(strInput)

How can I avoid an error at line four ? And get it converted to double
to have this output : 123.8

Thanks a lot!

Marty

[Marty]

This is exactly what I was looking for,

Thanks a lot!

Cor Ligthert wrote:

Marty,

Maybe you can use this,

If
System.Globaliz ation.CultureIn fo.CurrentUICul ture.NumberForm at.CurrencyDeci m
alSeparator = "," Then
I hope this helps?

Cor

If I don't know that my (or any) windows 2k regional setting for the
decimal symbol is the dot (".") and I want to do this:

1- Dim dblOutput As Double
2- Dim strInput As String
3- strInput = "123,8"
4- dblOutput = Convert.ToDoubl e(strInput)

How can I avoid an error at line four ? And get it converted to double
to have this output : 123.8

Thanks a lot!

Marty

[Herfried K. Wagner [MVP]]

* Marty <re***@to.forum > scripsit:

If I don't know that my (or any) windows 2k regional setting for the
decimal symbol is the dot (".") and I want to do this:
1- Dim dblOutput As Double
2- Dim strInput As String
3- strInput = "123,8"
4- dblOutput = Convert.ToDoubl e(strInput)

How can I avoid an error at line four ? And get it converted to
double to have this output : 123.8

I suggest to store the values formatted in the invariant culture (this
culture uses "." instead of ",") and then parse the number using this
culture:

\\\
Dim d As Double = 22.34234
Dim s As String = d.ToString(Syst em.Globalizatio n.CultureInfo.I nvariantCulture )
MsgBox(s)
d = Double.Parse(s, System.Globaliz ation.CultureIn fo.InvariantCul ture)
MsgBox(d.ToStri ng())
///

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

[Marty]

Does it mean that if the user write in the textbox "123,8", this
invariant culture could replace the "," by a "." ?

Marty
Herfried K. Wagner [MVP] wrote:

* Marty <re***@to.forum > scripsit:

If I don't know that my (or any) windows 2k regional setting for the
decimal symbol is the dot (".") and I want to do this:
1- Dim dblOutput As Double
2- Dim strInput As String
3- strInput = "123,8"
4- dblOutput = Convert.ToDoubl e(strInput)

How can I avoid an error at line four ? And get it converted to
double to have this output : 123.8

I suggest to store the values formatted in the invariant culture (this
culture uses "." instead of ",") and then parse the number using this
culture:

\\\
Dim d As Double = 22.34234
Dim s As String = d.ToString(Syst em.Globalizatio n.CultureInfo.I nvariantCulture )
MsgBox(s)
d = Double.Parse(s, System.Globaliz ation.CultureIn fo.InvariantCul ture)
MsgBox(d.ToStri ng())
///

[Herfried K. Wagner [MVP]]

* Marty <re***@to.forum > scripsit:

Does it mean that if the user write in the textbox "123,8", this
invariant culture could replace the "," by a "." ?

No. I was referring to values that are stored in a file, for example.
If the user types in "12,123", on an en-US system 'Double.Parse' will
return 12,123.0 whereas on an de-DE system it would return 12.123.

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