RowHeaderColumn change after EventResize

It should update properly if you force a full refresh by calling Update():

Public Sub dpCalendar_EventResize(sender As Object, e As DayPilot.Web.Ui.Events.EventResizeEventArgs) Handles dpCalendar.EventResize 
  Me.dpCalendar.Resources.FindById(e.Resource).Columns(0).Html = 20 
  Me.dpCalendar.Update(CallBackUpdateType.Full);
End Sub

Let me know if it didn't help.

Hi!
It works thanks!!!! The RowHeaderColumn is update correctly. But now, after resize event all cells are empty!
The column is updated but I lose all data. What I'm doing wrong?

By default, events are not stored anywhere so you need to reload them (use DataSource and DataBind just like in Page_Load):

Public Sub dpCalendar_EventResize(sender As Object, e As DayPilot.Web.Ui.Events.EventResizeEventArgs) Handles dpCalendar.EventResize 
  Me.dpCalendar.Resources.FindById(e.Resource).Columns(0).Html = 20 
  Me.dpCalendar.DataSource = ' ....
  Me.dpCalendar.DataBind()
  Me.dpCalendar.Update(CallBackUpdateType.Full);
End Sub

You can also store the events in the ViewState but it's not recommended because it's much slower (StoreEventsInViewState property). In that case the data binding wouldn't be necessary.

Wow!
It works well!

Thank you.
Davide