c# - Decimal out of range exception -


in c# application, trying save decimal price sql server table. columns type decimal no total digits defined.

without discount calculations, works fine.

but when run calculations, final value of 21800, , following error when trying save it.

"parameter value '218000/00000000000000' out of range."

i don't understand zeros come from! thing know myvalue.tostring() 218000/00000000000000, too!

i understand digits after floating point caused calculations. whatever do, value 21800 when watching it. why trying save 218000/00000000000000? why care @ zeros?

any ideas why happens , how fix it?

there 2 ways store decimal numbers:

  • fixed-point: have defined in sql server project. defined decimal (19,4), means 19 digits total , 4 digits after decimal point. if define such type, every number always has 4 digits after decimal point; , also, cannot store number more 4 digits after decimal point. and note, there no equivalent fixed point in c#!

  • floating point: these types float, double , decimal in c#, , type float(n)in sql server. in floating point, names says, can vary number of digits before , behind decimal point. (technically, have fixed number of digits, so-called mantissa, , can move decimal point around 2nd number, exponent)

so project: in database, use fixed point, while in c#, have floating point. therefore, when calculate in c#, , want store in database, converted floating point fixed point. however, if number in c# not fit decimal numbers in database, out of range error.


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