# 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](https://www.telerik.com/products/aspnet-ajax/documentation/controls/scheduler/data-binding/overview).

2. Add a [custom template](https://www.telerik.com/products/aspnet-ajax/documentation/controls/scheduler/appearance-and-styling/templates) 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
   ```

> note The `ExportToICalendar` method sets the *Location* of the .ics event to the value of the *Location* attribute of the exported appointment.

## See Also

* [AppointmentCommand](https://www.telerik.com/products/aspnet-ajax/documentation/controls/scheduler/server-side-programming/server-events/appointmentcommand)

* [Scheduler - iCalendar Export demo](https://demos.telerik.com/aspnet-ajax/scheduler/examples/export/defaultcs.aspx)