Parsing DateTime serialized from signalR

Question

Using the very nice signalR library, I have a broadcast message that sends an object of type ChangeDetail to the client browsers. The object sent includes a DateTime property:

var change = new ChangeDetail();
change.TimeOfChange = DateTime.Now();

When I send this to the clients, SignalR takes care of the serializing of the objects to JSON, but in the client javascript code when I inspect the object, it looks like this:

console.log (change.TimeOfChange); --> "/Date(1327332563969)/"

How I get that back into a js Date object? I could write a regex to get the number, and the Date.parse with that number, but that seems a little cumbersome...?

score 3 · Accepted Answer · answered Jan 23 '12 at 16:34

3

I have typically added the following prototype extension to String.

String.prototype.toDate = function () {
  "use strict";

  var match = /\/Date\((\d{13})\)\//.exec(this);

  return match === null ? null : new Date(parseInt(match[1], 10));
};

Basically you can go change.TimeOfChange.toDate() to get back an actual date object

answered Jan 23 '12 at 16:34

Chris Baxter

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Cool, adding it to a string extension is a good idea. What does "use strict" do? – Matt Roberts Jan 23 '12 at 20:42
@Matt - see http://stackoverflow.com/questions/1335851/what-does-use-strict-do-in-javascript-and-what-is-the-reasoning-behind-it – Chris Baxter Jan 23 '12 at 21:03

Parsing DateTime serialized from signalR

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