Conversion

[JJ]

Hello all,

Convert.ToDouble(this.comboBox2.Text.Substring(0,1 0));

This can result in an error, but sometimes, it doesn't, because
this.comboBox2.Text.Substring(0,10) is a value that CAN be converted to a
double. Is there a way to check for this possibility, and only convert when
the value CAN be converted?

Thanks in advance,

Vincent

[Jon Skeet [C# MVP]]

JJ <ge***************@lycos.nl> wrote:

Convert.ToDouble(this.comboBox2.Text.Substring(0,1 0));

This can result in an error, but sometimes, it doesn't, because
this.comboBox2.Text.Substring(0,10) is a value that CAN be converted to a
double. Is there a way to check for this possibility, and only convert when
the value CAN be converted?

The simplest way is just to use try/catch and catch the exception. You
could provide a hard-coded check to catch most of the error cases, but
you'll still want to use a try/catch for any that the simple test
doesn't reject but which still can't be converted (out of range etc).

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too

[Ignacio Machin \( .NET/ C# MVP \)]

Hi ,

You can try Double.TryParse( )

Cheers,

--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation

"JJ" <ge***************@lycos.nl> wrote in message
news:OL**************@TK2MSFTNGP09.phx.gbl...

Hello all,

Convert.ToDouble(this.comboBox2.Text.Substring(0,1 0));

This can result in an error, but sometimes, it doesn't, because
this.comboBox2.Text.Substring(0,10) is a value that CAN be converted to a
double. Is there a way to check for this possibility, and only convert when the value CAN be converted?

Thanks in advance,

Vincent

[Jon Skeet [C# MVP]]

<"Ignacio Machin \( .NET/ C# MVP \)" <ignacio.machin AT
dot.state.fl.us>> wrote:

You can try Double.TryParse( )

Doh - it shows how sleepy I am today that I'd forgotten double.TryParse
:(

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too