Passing an Int64 from .net service to Javascript using BigInt

Asked Apr 10 '19 at 11:05

Active Jan 25 '22 at 11:46

Viewed 154 times

I am trying to pass an Int64 number from a .Net service into javascript while maintain the precision using BigInt.

It seems however that Javascript is rounding this number before I can cast it as a BigInt.

In the service, I am returning the Int64 number 636904216084035679.

The following Javascript calls this service, and logs both a BigInt and JS number. The results are 636904216084035712n and 636904216084035700 respectively.

Services.ClientService.GetClientToken(function (clientToken)
{
  console.log(BigInt(clientToken));
  console.log(clientToken);
  resolve(BigInt(clientToken));
}, function ()
  {
    reject();
  });

Clearly the 'clientToken' variable is being incorrectly set as a number type when the function is called which is losing the accuracy required. Any thoughts on how to pass Int64 numbers from a service?

edited Jan 25 '22 at 11:46

Paritosh

11,144
5
56
74

asked Apr 10 '19 at 11:05

Radderz

2,770
4
28
40

3

You could send `clientToken` as a string and then `BigInt(clientToken)` – adiga Apr 10 '19 at 11:08
1

@adiga Good point, should have thought of that! – Radderz Apr 10 '19 at 11:09

Passing an Int64 from .net service to Javascript using BigInt

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