I am writing a program where the user inputs currency in US dollars. I want
the program to only accept valid currency input, converting the string into
the proper type of variable (double?), and to make sure there are no illegal
characters entered so that it doesn't make an error. I basically want it to
strip out any characters that aren't numbers, in case the user enters
something like "$34.23".
So far, in my hours of research today I have turned up some evidence that
this involves 'parse,' but I can't figure out the exact way to use it.
I am lost, but this is as far as I have made it so far. It doesn't work
("name 'numberstyles' not declared")
something like this?
Dim strUserInput As Double = Double.Parse(Te xtBox1.Text,
NumberStyles.Cu rrency) 3 4628
Josh,
Normally all should be done by the globalization in dotnet and especially by
the very strong conversion methods which are in VBNet as extra part to the
standard DotNet. This are full methods from the framework.
therefore
\\\
mydouble as double = cdbl(textbox1.t ext)
//
Should do the job for you.
When you set that in a try catch block as this
\\\
try
mydouble as double = cdbl(textbox1.t ext)
catch ex as message
messagebox.show ("there should be enterend something strange " &
ex.tostring
end try
////
You will see that you catch almost every error.
(However I would take the decimal)
mydecimal as decimal = cdec(textbox1.t ext)
Here a link to those conversion functions. http://msdn.microsoft.com/library/de...conversion.asp
I hope this helps?
Cor
"Josh" <jo*****@hotmai l.com>
.. I am writing a program where the user inputs currency in US dollars. I want the program to only accept valid currency input, converting the string into the proper type of variable (double?), and to make sure there are no illegal characters entered so that it doesn't make an error. I basically want it to strip out any characters that aren't numbers, in case the user enters something like "$34.23".
So far, in my hours of research today I have turned up some evidence that this involves 'parse,' but I can't figure out the exact way to use it.
I am lost, but this is as far as I have made it so far. It doesn't work ("name 'numberstyles' not declared")
something like this?
Dim strUserInput As Double = Double.Parse(Te xtBox1.Text, NumberStyles.Cu rrency)
"Josh" <jo*****@hotmai l.com> schrieb: I am lost, but this is as far as I have made it so far. It doesn't work ("name 'numberstyles' not declared")
something like this?
Dim strUserInput As Double = Double.Parse(Te xtBox1.Text, NumberStyles.Cu rrency)
Your code is OK. Add a 'Imports System.Globaliz ation' in the imports
section of your file...
--
Herfried K. Wagner [MVP]
<URL:http://dotnet.mvps.org/>
Josh,
If you are processing currency I would suggest using Decimal to avoid
precision loss and strange rounding problems. A sample code snipped would
be:
Decimal.Parse(T extBox1.Text, System.Globaliz ation.NumberSty les.Currency)
Ron Allen
"Josh" <jo*****@hotmai l.com> wrote in message
news:10******** *****@news20.fo rteinc.com... I am writing a program where the user inputs currency in US dollars. I want the program to only accept valid currency input, converting the string into the proper type of variable (double?), and to make sure there are no illegal characters entered so that it doesn't make an error. I basically want it to strip out any characters that aren't numbers, in case the user enters something like "$34.23".
So far, in my hours of research today I have turned up some evidence that this involves 'parse,' but I can't figure out the exact way to use it.
I am lost, but this is as far as I have made it so far. It doesn't work ("name 'numberstyles' not declared")
something like this?
Dim strUserInput As Double = Double.Parse(Te xtBox1.Text, NumberStyles.Cu rrency) This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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