ICalendar link generator

ICalendar.razor

@using Ical.Net
@using Ical.Net.Serialization
@* requires Ical.Net library from NUGET *@
@if(Calendar != null)
{
    <a href=@dataUrl download=@Filename >@ChildContent</a>
}
@code
{
    [Parameter] public Calendar Calendar { get; set; }

    [Parameter] public RenderFragment ChildContent {get;set;}

    [Parameter] public string Filename { get; set; } = "Calendar.ics";

    string dataUrl => GetDataUrl();

    string GetDataUrl()
    {
        var serializer = new CalendarSerializer();
        var text = serializer.SerializeToString(Calendar);
        var data = System.Text.Encoding.UTF8.GetBytes(text);
        var base64 = Convert.ToBase64String(data);
        return $"data:text/calendar;base64,{base64}";
    }
}

Usage:

1. import the Ical.Net library - this provides the ICalendar classes and logic.
2. create the ICalendar.razor as shown in the snippet.
3. add <ICalendar Calendar=@myCalendar Filename="test.ics">Add to Calendar</ICalendar> to a page
4. when the myCalendar value is set the link will be valid.

Example

<ICalendar Calendar=@calendar File="example.ics">Add to Calendar</ICalendar>

C# code..

@code {

   Calendar calendar;

   protected override void OnInitialized()
   {
        var start = DateTime.Now.AddHours(1);
        var end = start.AddHours(1);

        var e = new CalendarEvent
        {
            Start = new CalDateTime(start),
            End = new CalDateTime(end),
            Description = "appointment details"
        };

        calendar= new Calendar();
        calendar.Events.Add(e);
   }
}

I've updated the gist to use base64 encoding rather than using URL encoding, as it does not corrupt the description or summary, etc.