如何在机器上打开 Outlook 时从 Outlook 互操作获取定期约会运行代码？

Question

我浪费了很多时间试图弄清楚为什么我会收到异常“您更改了该项目的一个重复项，并且该实例不再存在。关闭所有打开的项目并重试。”当运行以下代码时：

if(appointmentItem.IsRecurring)
{                        
    RecurrencePattern recurrencePattern = appointmentItem.GetRecurrencePattern();
    DateTime first =
        new DateTime(
            start.Year,
            start.Month,
            start.Day,
            appointmentItem.Start.Hour,
            appointmentItem.Start.Minute,
            0
        );
    DateTime last = end.AddDays(1).Date.AddSeconds(-1);
    AppointmentItem recurringAppointment;
    for (DateTime date = first; date <= last; date = date.AddDays(1))
    {
        try
        {
            //  https://docs.microsoft.com/en-us/dotnet/api/microsoft.office.interop.outlook.recurrencepattern.getoccurrence?view=outlook-pia#microsoft-office-interop-outlook-recurrencepattern-getoccurrence(system-datetime)
            //  The GetOccurrence method generates an error if no appointment of that series exists on the specified date.                                
            recurringAppointment = recurrencePattern.GetOccurrence(date);
            dataRow =
                CreateDataRowFromAppointmentItem(
                    recurringAppointment
                );
            appointments.Rows.Add(dataRow);
        }
        catch (System.Exception)
        {
            //  Exception is thrown if no 
            continue;
        }
    }
}

我终于意识到，如果 Outlook 未在计算机上打开，代码运行就可以工作！

如果用户在运行使用此代码的同一台计算机上打开 Outlook，您应该如何获得定期约会？

注意：当异常发生时，它发生在对 recurrencePattern.GetRecurrence(data)

的调用中

Answer 1

我更新了我的代码以获取这样的应用程序，现在一切正常：

private Result<Application> GetOutlookApplication()
{
    try
    {
        Application outlookApplication =
            Marshal.GetActiveObject(
                "Outlook.Application"
            ) as Application;
        if (outlookApplication != null)
            return new Result<Application>(
                outlookApplication
            );
    }
    catch
    {
    }

    try
    {
        Application outlookApplication = new Application();
        //
        //  Microsoft says this will automatically initialize the session
        //      for the default profile if it isn't already initialized and 
        //      to avoid calling Logon.
        //      https://docs.microsoft.com/en-us/dotnet/api/microsoft.office.interop.outlook._namespace.logon?view=outlook-pia
        
        return new Result<Application>(outlookApplication);
    }
    catch (System.Exception ex)
    {
        return new Result<Application>()
            .WithException(ex);
    }
}

获取现有实例运行（如果可用）就可以了。以前我每次都创建一个新的应用程序对象。

如何在机器上打开 Outlook 时从 Outlook 互操作获取定期约会运行代码？

How to get recurring appointments from Outlook interop when Outlook is open on the machine running the code?

c#

outlook

office-automation

office-interop

如何在机器上打开 Outlook 时从 Outlook 互操作获取定期约会 运行 代码？

How to get recurring appointments from Outlook interop when Outlook is open on the machine running the code?

c#

outlook

office-automation

office-interop

如何在机器上打开 Outlook 时从 Outlook 互操作获取定期约会运行代码？