Tuesday, June 18, 2013

Passing Date parametere from Javascript to WCF

Having a service method that accepts two parameters will look like this:

public class ServiceRequest
    Nullable<DateTime> DateTimeFrom { get; set; }
    Nullable<DateTime> DateTimeTo { get; set; }

public interface IService
    [WebInvoke(UriTemplate = "getServiceCall", Method = "POST")]
    ServResponse GetBusinessObjects(ServiceRequest filter);
Now, To start calling this method we need to construct a Json data representing the parameters.
      var fromDate = new Date(2013, 06, 18);
      var toDate = new Date();

      var datavar = {
            DateTimeFrom: fromDate.toMSJSON(),
            DateTimeTo: toDate.toMSJSON()
      var parameters = JSON.stringify(datavar); 

But, before calling the toMSJSON on date object we need to define it as follows:

// Let Date type be compatible for Microsoft WCF
Date.prototype.toMSJSON = function () {
/// <summary>Let Date type be compatible for Microsoft WCF.</summary>
var date = '/Date(' + this.getTime()  + '-0000)/';

Getting DateTime from WCF

// convert WCF date to Javascript
String.prototype.DateWCF = function () {
    /// <summary>convert string into Date</summary>
    var matches = this.match(/\/Date\(([0-9]+)(?:.*)\)\//);
    if (matches)
        return new Date(parseInt(matches[1]));
Notice that when you use a date in javascript it is representing your local date based on the settings on your systemn and browser. As a result you might pass different notation to WCF. For example, my broweser has an timezone offset of -120 minutes. So when I ask to convert 06/20/2013 02:10:04 I see 2013-06-20T00:10:04.000Z which is perfectly normal because that represents the same exact time as I meant on my browser. Thus WCF will get the correct date aswell.