Export to ICalendar

RadScheduler allows you to export appointments in the industry-standard ICalendar format.

1. Add a RadScheduler control to your Web page and bind it to a data source.

2. Add a custom template to the scheduler so that each appointment has an export button:

   ASP.NET

     <AppointmentTemplate>
     <%# Eval("Subject") %>
     <div style="text-align: right;">
    	<span style="cursor: pointer; cursor: hand;">
    	  <asp:ImageButton runat="server" ID="Button1" ImageUrl="Outlook.gif" AlternateText="Export to iCalendar"
    	  CommandName="Export" OnClientClick="Export(this, event); return false;" />
    	</span>
     </div>
    </AppointmentTemplate>

3. On the codebehind page for your Web page, add a private helper method to your Page class that can write the ICalendar strings youto the HTTP response:

   C#

    private void WriteCalendar(string data)
    {
    	HttpResponse response = Page.Response;
    	response.Clear();
    	response.Buffer = true;
    	response.ContentType = "text/calendar";
    	response.ContentEncoding = Encoding.UTF8;
    	response.Charset = "utf-8";
    	response.AddHeader("Content-Disposition", "attachment;filename=\"RadSchedulerExport.ics\"");
    	response.Write(data);
    	response.End();
    } 

   VB

    Private Sub WriteCalendar(ByVal data As String)
    	Dim response As HttpResponse = Page.Response
    	response.Clear()
    	response.Buffer = True
    	response.ContentType = "text/calendar"
    	response.ContentEncoding = Encoding.UTF8
    	response.Charset = "utf-8"
    	response.AddHeader("Content-Disposition", _
    			  "attachment;filename=""RadSchedulerExport.ics""")
    	response.Write(data)
    	response.[End]()
    End Sub
    	

4. Give the scheduler an AppointmentCommand event handler to respond when the user clicks the new button in the template.This event handler uses the RadScheduler's static ExportToICalendar method that takes a single appointment as first parameter and converts it into the ICalendar format. Its second parameter hasTimeZones is indicating whether time zone support is enabled.

   C#

    protected void RadScheduler1_AppointmentCommand(object sender, AppointmentCommandEventArgs e)
    {
    	if (e.CommandName == "Export")
    	{
    		//exporting a single appointment that supports time zones
    		WriteCalendar(RadScheduler.ExportToICalendar(e.Container.Appointment, true));
    	}
    }  

   VB

    Protected Sub RadScheduler1_AppointmentCommand(ByVal sender As Object,
    ByVal e As AppointmentCommandEventArgs) Handles RadScheduler1.AppointmentCommand
    	If e.CommandName = "Export" Then
    		'exporting a single appointment that supports time zones
    		WriteCalendar(RadScheduler.ExportToICalendar(e.Container.Appointment, True))
    	End If
    End Sub

5. Add ImageButton control with the same image as the one in the appointment template. On its Click event,add an event handler to export all of the appointments in the scheduler. This event handler calls the RadScheduler's static ExportToICalendar method to convert a collection of appointments to the ICalendar format:

   C#

    protected void Button1_Click(object sender, ImageClickEventArgs e)
    {
    	//exporting a collection of appointments that do not support time zones
    	WriteCalendar(RadScheduler.ExportToICalendar(RadScheduler1.Appointments, false));
    }

   VB

    Protected Sub Button1_Click(ByVal sender As Object,
     ByVal e As ImageClickEventArgs) Handles Button1.Click
        'exporting a collection of appointments that do not support time zones
        WriteCalendar(RadScheduler.ExportToICalendar(RadScheduler1.Appointments, False))
    End Sub

The ExportToICalendar method sets the Location of the .ics event to the value of the Location attribute of the exported appointment.

See Also

• AppointmentCommand

• Scheduler - iCalendar Export demo

• Code Library Project: Import ICalendar Data