New events can be created by selecting time cells using drag and drop. This will fire the onTimeRangeSelected event.
JavaScript
Simple Prompt
    // event creation
    dp.onTimeRangeSelected = function (args) {
        var name = prompt("New event name:", "Event");
        if (!name) return;
        var e = new DayPilot.Event({
            start: args.start,
            end: args.end,
            id: DayPilot.guid(),
            text: name
        });
        dp.events.add(e);
        dp.clearSelection();
        dp.message("Created");
    };
See also:
ASP.NET. MVC
Modal Dialog
@Html.DayPilotMonth("dpm", new DayPilotMonthConfig {
  BackendUrl = ResolveUrl("~/Month/Backend"),
  ...
  TimeRangeSelectedHandling = TimeRangeSelectedHandlingType.JavaScript,
  TimeRangeSelectedJavaScript = "timeRangeSelected(start, end)"
})
The timeRangeSelected() function will open a modal dialog using DayPilot.Modal.
<script type="text/javascript">
function timeRangeSelected(start, end, resource) { var modal = new DayPilot.Modal(); modal.top = 60; modal.width = 300; modal.opacity = 70; modal.border = "10px solid #d0d0d0"; modal.closed = function() { if(this.result == "OK") { dpm.commandCallBack('refresh'); } dpm.clearSelection(); }; modal.showUrl("New?start=" + start.toStringSortable() + "&end=" + end.toStringSortable()); }
</script>
After creating the new event in the database (in New which is a standalone page/view) the .closed event handler is called and the events in Scheduler are refreshed using .commandCallBack().
protected override void OnCommand(CommandArgs e)
{
  switch (e.Command)
  {
    case "refresh":
      UpdateWithMessage("Refreshed");
      break;
  }
}
protected override void OnFinish()
{
  // only load the data if an update was requested by an Update() call
  if (UpdateType == CallBackUpdateType.None)
  {
      return;
  }
  Events = new EventManager(Controller).FilteredData(VisibleStart, VisibleEnd).AsEnumerable();  // your data-loading method
  DataStartField = "start";
  DataEndField = "end";
  DataTextField = "text";
  DataIdField = "id";
}
  ASP.NET WebForms
 Modal Dialog
<DayPilot:DayPilotMonth ID="DayPilotMonth1" runat="server" ... ClientObjectName="dpm" TimeRangeSelectedHandling="JavaScript" TimeRangeSelectedJavaScript="timeRangeSelected(start, end)" OnCommand="DayPilotMonth1_Command" />
The timeRangeSelected() function will open a modal dialog using DayPilot.Modal.
<script type="text/javascript">
function timeRangeSelected(start, end, resource) { var modal = new DayPilot.Modal(); modal.top = 60; modal.width = 300; modal.opacity = 70; modal.border = "10px solid #d0d0d0"; modal.closed = function() { if(this.result == "OK") { dpm.commandCallBack('refresh'); } dpm.clearSelection(); }; modal.showUrl("New.aspx?start=" + start.toStringSortable() + "&end=" + end.toStringSortable()); }
</script>
After creating the new event in the database (in New.aspx which is a standalone page) the .closed event handler is called and the events in Scheduler are refreshed using .commandCallBack().
protected void DayPilotMonth1_Command(object sender, DayPilot.Web.Ui.Events.CommandEventArgs e)
{
  switch (e.Command)
  {
    case "refresh":
      DayPilotMonth1.DataSource = loadData(); // your method
      DayPilotMonth1.DataBind();
      DayPilotMonth1.Update();
      break;
  }
}
 DayPilot
DayPilot