XMLSerializer, customize float serialization

Abra

Hello,
I am using the XmlSerializer clas to serialize/deserialize XML files.
I have a XML file containing elements which have attributes of type
float. If the value of the float attribute in my application is for
example 43.5678, after the serialization I get the value
"43.56779999999 99". Is it any way to control the formatting of the float
type, to limit for example the number of positions after the comma ?
The only solution that I found is to change the attribute type from
float to string, and format the string programmaticall y by myself ... Is
there any better solution available ? I did not found any method to
overload the "ToString() " method for the floats ... And also the
XmlWriterSettin gs class does not offer any interface to control the
float format ...
Thanks in advance for your help.
Regards,
Abra
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Nov 13 '06 #1

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5231

ssamuel

Abra,

The string method isn't a bad solution. Just make sure you either
TryParse (preferrable) or catch NumberFormatExc eption (less preferred)
on deserialization .

Part of the problem is that you don't really want a float. The datum
you're trying to convey in your example is better cast into a decimal
type than a float type. If you were using decimal, you wouldn't have
this problem.
Stephan

Abra wrote:

Hello,
I am using the XmlSerializer clas to serialize/deserialize XML files.
I have a XML file containing elements which have attributes of type
float. If the value of the float attribute in my application is for
example 43.5678, after the serialization I get the value
"43.56779999999 99". Is it any way to control the formatting of the float
type, to limit for example the number of positions after the comma ?
The only solution that I found is to change the attribute type from
float to string, and format the string programmaticall y by myself ... Is
there any better solution available ? I did not found any method to
overload the "ToString() " method for the floats ... And also the
XmlWriterSettin gs class does not offer any interface to control the
float format ...
Thanks in advance for your help.
Regards,
Abra
*** Sent via Developersdex http://www.developersdex.com ***

Nov 13 '06 #2

Shailen Sukul

Read my post at
http://msdn.microsoft.com/newsgroups...99f&sloc=en-us
for information on how to implement custom serialization.
--
Good luck!

Shailen Sukul
Architect
(BSc MCTS, MCSD.Net MCSD MCAD)
Ashlen Consulting Service P/L
(http://www.ashlen.net.au)
"Abra" wrote:

Hello,
I am using the XmlSerializer clas to serialize/deserialize XML files.
I have a XML file containing elements which have attributes of type
float. If the value of the float attribute in my application is for
example 43.5678, after the serialization I get the value
"43.56779999999 99". Is it any way to control the formatting of the float
type, to limit for example the number of positions after the comma ?
The only solution that I found is to change the attribute type from
float to string, and format the string programmaticall y by myself ... Is
there any better solution available ? I did not found any method to
overload the "ToString() " method for the floats ... And also the
XmlWriterSettin gs class does not offer any interface to control the
float format ...
Thanks in advance for your help.
Regards,
Abra
*** Sent via Developersdex http://www.developersdex.com ***

Nov 14 '06 #3

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