DateTime problem with odata and datasource

[Walter]

Hello to everyone, I'm getting trouble with odata and datasource. I've an entity wich has a lot of date time fields wich are exposed by a grid. When I try to make an update i got this error: 

400 Bad Request

 
The field xxxx cannot be converted to DateTime etc etc...... string is not a valid date time value.  
Looking to POST request I've seen that the key /value pairs have this format: 
"Expiry_Date":"/Date(-6847804800000)/" 
I got this exception:
 "type": "System.FormatException", "stacktrace": " in System.DateTimeParse.Parse(String s, DateTimeFormatInfo dtfi, DateTimeStyles styles)\r\n in System.Convert.ToDateTime(String value, IFormatProvider provider)\r\n in System.String.System.IConvertible.ToDateTime(IFormatProvider provider)\r\n in System.Convert.ChangeType(Object value, Type conversionType, IFormatProvider provider)\r\n in System.Data.Services.Serializers.JsonDeserializer.ConvertValues(Object value, String propertyName, Type typeToBeConverted, DataServiceProviderWrapper provider)" 

Below there is the datasource and grid definitions:

var dataSource = new kendo.data.DataSource({

    type: "odata",

    serverPaging: true,

    serverSorting: true,

    serverFiltering: true,

    pageSize: 20,

    batch: false,

    schema: {

        model: {

            id: "No_",

            fields: {

                No_: { type: "string" },

                Customer_WR_Code: { type: "string" },

                Description: { type: "string" },

                State: { type: "string" },

                Creation_Date: { type: "date" },

                Creation_Time: { type: "date" },

                Closing_Date: { type: "date" },

                Closing_Time: { type: "date" },

                Cancelling_Date: { type: "date" },

                Cancelling_Time: { type: "date" },

                Expiry_Date: { type: "date" },

                Appointment_Begin_Date: { type: "date" },

                Appointment_Begin_Time: { type: "date" },

                Appointment_End_Time: { type: "date" },

                Appointment_End_Date: { type: "date" },

                DateTime_Field_1: { type: "date" },

                DateTime_Field_2: { type: "date" },

                Date_Field_1: {type:"date"},

                Date_Field_2: {type:"date"}

 

            }

        }

    },

    transport: {

        read: "WCFDB.svc/View_Work_Request",

        update: {

            url: "WCFDB.svc/View_Work_Request",

            type: "POST",

            dataType: "json"

        }       

    }

 

});

$("#grid").kendoGrid({

             dataSource: dataSource,

             height: 550,

             pageable: {

                 refresh: true,

                 pageSizes: true

             },

             reorderable: true,

             editable: "inline",

             sortable: true,

             filterable: true,

             columnMenu: true,              

             navigatable: false,

             resizable: true,

             toolbar: kendo.template($("#tmplToolBar").html()),

             change: function (e) {

                 var grid = $("#grid").data("kendoGrid");

                 var model = grid.dataItem(grid.select());

                 refreshTab(model);

             },

             dataBound: function (e) { var item = e.sender.dataSource.at(0); refreshTab(item); },

             selectable: "row",

             columns: kendoGridColumns               

         });

Here the service:

[JSONPSupportBehavior]

 public class WCFDB : DataService<WOMContainer>

 {

     // Questo metodo viene chiamato solo una volta per inizializzare i criteri a livello di servizio.

     public static void InitializeService(DataServiceConfiguration config)

     {

         // TODO: impostare regole per indicare i set di entità e le operazioni del servizio visibili, aggiornabili e così via.

         // Esempi:

         config.SetEntitySetPageSize("*", 20);       

         config.SetEntitySetAccessRule("*", EntitySetRights.All);

         config.SetServiceOperationAccessRule("*", ServiceOperationRights.All);

         config.DataServiceBehavior.MaxProtocolVersion = DataServiceProtocolVersion.V2;

         config.UseVerboseErrors = true;   

     }

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[Seminda]

Following links solve your problem.
http://www.kendoui.com/documentation/ui-widgets/grid/configuration.aspx

http://www.kendoui.com/forums/framework/globalization/kendo-fails-to-parse-or-format-utc-dates.aspx