How to: Use a Faster Loading Appointment Editing Form
To reduce this response time, you can use a fast loading modification of the appointment editing form - the AppointmentFormEx web template. It renders the Recurrence form separately from the main Appointment editing form and even then only when it is needed, resulting in a 30% performance gain.
This form is included into the ASPxScheduler Suite and can be located in the DevExpress/ASPxSchedulerForms folder of the website. To copy templates to your project site, use the ASPxScheduler control's Smart Tag as shown in the Dialog Forms article. To use the AppointmentFormEx form, set the ASPxSchedulerOptionsForms.AppointmentFormTemplateUrl property as follows.
ASPxScheduler1.OptionsForms.AppointmentFormTemplateUrl = "~/DevExpress/ASPxSchedulerForms/AppointmentFormEx.ascx";
You can also create your own form using only standard Windows controls. This will reduce load times.