【发布时间】：2012-01-11 11:03:24
【问题描述】：
背景：我正在用 C# (.NET 3.5) 编写一个应用程序，它查看多个用户的 Outlook 2003 日历（使用 COM 对象），获取约会并为这些约会插入数据进入数据库。
问题：在第一个用户日历之后，后续日历上的任何重复项目将始终具有该项目第一次出现的开始和结束时间。我在用户之间释放 COM 对象（以及在此期间，如果用户有很多项目），并且项目集合被正确限制（由于只插入了少数重复任务（尽管错误的开始/结束）而不是“无结束”任务的无限）。正确的开始/结束时间是要求的一部分，具有可用于此应用程序或其他应用程序的信息，以计算出用户在给定日期范围和工作时间有多少空闲时间。
代码：（变量声明省略，它们在相关函数的顶部）
遍历用户（在 Main() 中）：
foreach (DataRow drUserCalendar in dtCalendars.Rows)
{
//for each calendar we're looking at, export their calendar data and put it in the database
try
{
appOutlook = new Outlook.Application();
ExportCalendar(drUserCalendar);
Marshal.FinalReleaseComObject(appOutlook);
GC.Collect();
}
catch (Exception ex)
{
//report error
}
}
从日历中提取信息
static void ExportCalendar(DataRow drUser)
{
strDisplayName = drUser["DisplayName"].ToString();
strUserID = drUser["ID"].ToString();
int.TryParse(drUser["PreviousDays"].ToString(), out intPrevious);
int.TryParse(drUser["FutureDays"].ToString(), out intFuture);
dtmAllowedPreviousStart = DateTime.Now.AddDays(-intPrevious);
dtmAllowedFutureStart = DateTime.Now.AddDays(intFuture);
nsOne = appOutlook.GetNamespace("MAPI");
nsOne.Logon(null, null, false, false);
rcpOne = nsOne.CreateRecipient(strDisplayName);
intCount = 0;
if (rcpOne.Resolve())
{
fldOne = nsOne.GetSharedDefaultFolder(rcpOne, Outlook.OlDefaultFolders.olFolderCalendar);
strRestrict = "[Start] > '" + MIN_START_DATE.ToString("g") + "' And [End] < '" + MAX_START_DATE.ToString("g") + "'";
itms = fldOne.Items;
itms.Sort("[Start]", Type.Missing);
itms.IncludeRecurrences = true;
itmsRestricted = itms.Restrict(strRestrict);
itmsRestricted.Sort("[Start]", Type.Missing);
itmsRestricted.IncludeRecurrences = true;
blnIsRecurring = false;
dicRecurringTaskTracker = new Dictionary<string, int>();
foreach (object objOne in itmsRestricted)
{
if (intCount >= 100 || blnIsRecurring)
{
//release COM objects. Outlook doesn't like you having more than 250 ish items without cleaning up.
Marshal.FinalReleaseComObject(appOutlook);
appOutlook = new Outlook.Application();
GC.Collect();
intCount = 0;
}
if (objOne is Outlook.AppointmentItem)
{
appItem = (Outlook.AppointmentItem)objOne;
blnException = false;
//get data from the item
strEntryID = appItem.EntryID;
strSubject = appItem.Subject;
strBody = appItem.Body;
dtmStart = appItem.Start;
dtmEnd = appItem.End;
blnException = EXCEPTIONS.Contains(strSubject);
//if the item is an exception we're done with it.
if (!blnException)
{
strRecurrenceInterval = "";
strRecurrenceType = "";
strRecurrenceInfo = "";
//check if it's a recurring task.
blnIsRecurring = appItem.IsRecurring;
if (blnIsRecurring)
{
//check to see if we've already had a task from this series
if (!dicRecurringTaskTracker.Keys.Contains(strEntryID))
{
//Start at 0 so the first (this) task
//is number 1.
dicRecurringTaskTracker.Add(strEntryID, 0);
}
//update number
dicRecurringTaskTracker[strEntryID] += 1;
//change the subject to add the count on the end
strEntryID = strEntryID + '-' + dicRecurringTaskTracker[strEntryID].ToString();
//it's a recurring task, so we need to find out when/how often.
rpTaskRecurrence = appItem.GetRecurrencePattern();
rtTaskRecurrenceType = rpTaskRecurrence.RecurrenceType;
strRecurrenceType = rtTaskRecurrenceType.ToString();
strRecurrenceInterval = rpTaskRecurrence.Interval.ToString();
switch (strRecurrenceType)
{
case "olRecursDaily":
case "olRecursMonthNth":
case "olRecursWeekly":
strRecurrenceInfo = rpTaskRecurrence.DayOfWeekMask.ToString();
break;
case "olRecursMonthly":
strRecurrenceInfo = rpTaskRecurrence.DayOfMonth.ToString();
break;
}
}
if (strEntryID != null && strSubject != null && dtmStart != null && dtmEnd != null
&& (intPrevious == 0 || (dtmStart > dtmAllowedPreviousStart)) && (intFuture == 0 || (dtmStart < dtmAllowedFutureStart)))
{
//build up the SQL
strSQL = "EXEC UpdateCalendarEntry ";
strSQL += "@EntryID='" + strEntryID + "', ";
strSQL += "@Subject='" + strSubject.Replace("'", "''") + "', ";
strSQL += "@Body='" + strSubject.Replace("'", "''") + "', ";
strSQL += "@StartDate='" + dtmStart.ToString("dd-MMM-yyyy HH:mm:ss") + "', ";
strSQL += "@EndDate='" + dtmEnd.ToString("dd-MMM-yyyy HH:mm:ss") + "', ";
strSQL += "@UserCalendarID=" + strUserID + ",";
strSQL += "@Recurring = " + blnIsRecurring.ToString() + ",";
strSQL += "@RecurrenceType = '" + strRecurrenceType + "',";
strSQL += "@RecurrenceInterval = '" + strRecurrenceInterval + "',";
strSQL += "@RecurrenceInfo = '" + strRecurrenceInfo + "';";
try
{
//Execute SQL
}
catch (Exception ex)
{
//Print error message
MessageBox.Show(ex.ToString());
}
}
}
Marshal.FinalReleaseComObject(appItem);
GC.Collect();
}
strEntryID = null;
strSubject = null;
strBody = null;
intCount++;
}
//finished looping, do some clean up.
Marshal.FinalReleaseComObject(nsOne);
Marshal.FinalReleaseComObject(rcpOne);
Marshal.FinalReleaseComObject(fldOne);
Marshal.FinalReleaseComObject(itms);
Marshal.FinalReleaseComObject(itmsRestricted);
GC.Collect();
}
else
{
throw new Exception("Could not resolve name");
}
}
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