google calendar api asp.net c# 删除事件答案

【问题标题】：google calendar api asp.net c# delete eventgoogle calendar api asp.net c# 删除事件
【发布时间】：2013-03-01 16:03:34
【问题描述】：

我有这个功能

 private static void DeleteEvent(CalendarService service, string pTitle,DateTime pDate)
    {
        FeedQuery query = new FeedQuery();
        query.Uri = new Uri("http://www.google.com/calendar/feeds/default/private/full");
        AtomFeed calFeed = service.Query(query);
        foreach (AtomEntry entry in calFeed.Entries)
        {
            if (pTitle.Equals(entry.Title.Text))
            {
                entry.Delete(); break;
            }
        }
    }

如何按标题和日期删除事件？

【问题讨论】：

标签： c# asp.net

【解决方案1】：

这些可能会有所帮助：

http://code.google.com/apis/calendar/data/2.0/developers_guide_dotnet.html#DeletingEvents
http://code.google.com/apis/calendar/data/2.0/developers_guide_dotnet.html#RetrievingEvents

我猜类似下面的方法可能会起作用：

EventQuery query = new EventQuery("https://www.google.com/calendar/feeds/default/private/full");  
query.StartDate = ...;
query.EndDate = ...;
EventFeed feed = service.Query(query);
foreach (var entry in feed.Entries)
{
    if (pTitle.Equals(entry.Title.Text))
    {
        entry.Delete(); break;
    }
}

【讨论】：

【解决方案2】：

虽然上述解决方案可行，但我会建议另一种方法。与其每次遍历所有事件并在找到时删除，不如让 Google 为您查找特定事件。可以通过以下方法使用ExtendedProperty 来完成

为您添加的每个事件分配一个 ID（与您在数据库中设置的相同）。
删除时，您将 ID 传递给删除并使用 Query 为您获取它
删除特定事件

Google.GData.Calendar.EventEntry Entry = new Google.GData.Calendar.EventEntry();

//create the ExtendedProperty and add the EventID in the new event object, 
//so it can be deleted / updated later
ExtendedProperty oExtendedProperty = new ExtendedProperty();
oExtendedProperty.Name = "EventID";
oExtendedProperty.Value = GoogleAppointmentObj.EventID;
Entry.ExtensionElements.Add(oExtendedProperty);

string ThisFeedUri = "http://www.google.com/calendar/feeds/" + CalendarID 
+ "/private/full";
Uri postUri = new Uri(ThisFeedUri);

//create an event query object and attach the EventID to it in Extraparameters
EventQuery Query = new EventQuery(ThisFeedUri);
Query.ExtraParameters = "extq=[EventID:" + GoogleAppointmentObj.EventID + "]";
Query.Uri = postUri;

//Find the event with the specific ID
EventFeed calFeed = CalService.Query(Query);

//if search contains result then delete
if (calFeed != null && calFeed.Entries.Count > 0)
{
   foreach (EventEntry SearchedEntry in calFeed.Entries)
   {
      SearchedEntry.Delete();
      break;
   }

}

【讨论】：