validate textbox

[Daniel]

Hallo,
I am begginer in C#. I would like to know how to validate data in
TextBox. So exactly I have to check if the value is a correct double
value. Can you give me some advice?
Maybe a link? Should I use a regular expression? or is there a simple
method?



Regards,
Daniel

 

[Marc Gravell]

double value;
if(double.TryParse(textbox1.Text, out value)) {
// is a legal double, with the value now in "value"
}

Marc

 

[Daniel]

dear Marc,
Thanks for help but it does not work under C# for Pocket PC ;-(

It works for normal windows Applications ;-)

Maybe you know how to it on pocket pc ??

Please help,


Regards,
Daniel



Marc Gravell napisal(a):

 

[Marc Gravell]

Something like:

try {
double value = double.Parse(textbox1.Text);
} catch { // specifically FormatException and OverflowException
// illegal, do something funky
}

?

Marc

 

[Marc Gravell]

Additionally; just to avoid replies that don't help you, it is usually
worth mentioning (like you did with your later "hide application"
question) details like "Pocket PC", "1.1 only", "no 3rd party
components" etc... it doesn't cause any real problems, but just takes
longer to get to an appropriate answer ;-p

Marc

 

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

Daniel,


It seems you are developing apps for the PPC , if this is true you will find
more targeted answers in the CF NG