Hello Stanislas,

Thank you for using our community.

I have investigated your case and manages to pass the editors values when submitting and the values are accurate. Here is how I accomplished that:

@(Html.Infragistics()

    .DateTimeEditorFor(m => m.StartDate)

    .ID("dateInfo")

    .Width(100)

    .DateDisplayFormat("time")

    .NullText("Enter Date")

    .DateInputFormat("hh:mm:ss")

    .Render()

)  

@(Html.Infragistics()

    .DateTimeEditorFor(m => m.EndDate)

    .ID("dateTermino")

    .Width(100)

    .DateDisplayFormat("time")

    .NullText("Enter Date")

    .DateInputFormat("hh:mm:ss")

    .Render()

)

<input id="btn" type="button" title="Submit" value="Submit"/>

    $("#btn").click(function submitHandler() {

        var startValue = $("#dateTermino").igEditor("option", "value");

        var startTime = startValue.getHours() + ":" + startValue.getMinutes() + ":" + startValue.getSeconds();

        var endValue = $("#dateInfo").igEditor("option", "value");

        var endTime = endValue.getHours() + ":" + endValue.getMinutes() + ":" + endValue.getSeconds();

        $.ajax({

            type: "POST",

            data: { newEndTime: endTime, newStartTime: startTime },

            url:"@Url.Action("SaveTime")",

            success:function successHandler() {

                aler("time");

            }

        })

    });

public ActionResult SaveTime(DateTime? newEndTime, DateTime? newStartTime)

{  …

}

Please take a look at the code I provided you and let me know how it works for you.