Parsing decimal value issue

Question

I am passing the exact Id (i.e. 123456789123456.99) from controller in JSONResult, but when I get the value in AJAX response I get Id (i.e. 123456789123456.98).

I have observed a weird behavior in JavaScript while parsing data. Please look into the below image. Can anyone please help me here to get the same Id after parsing through JSON.

Answer 1

The Id value is too big. JavaScript uses double-precision floats for numbers, and they have about 15 digits of precision. The highest integer that JavaScript can reliably save is something like 2^51. That is why the value get rounded when you parse.

However, you can work around this limitation by sending the number as a string like so:

var res = '{"Id":"123456789123456.99"}';