如何通过 uniqueId 预约 EWS

Question

我使用 EWS 创建约会没有问题。我像这样保存uniqueId

Dim rdvEncours As DevisRdv = GetRdv(ConnectedUser,LesDatas) 
Appointment.Save(New FolderId(WellKnownFolderName.Calendar, rdvEncours.Collaborateur.Mail))
rdvEncours.ExchangeId = Appointment.Id.UniqueId
LesDatas.SaveChange();

在我想删除它之后。我有一个基于标题、日期、小时的工作功能，但它并不完全安全。然后我想使用我的 UniqueId 然后我创建这个函数

Public Function FindAppointment(Service As ExchangeService, UnikId As String) As Appointment
    Dim CalendarFolder As CalendarFolder = CalendarFolder.Bind(Service, New FolderId(WellKnownFolderName.Calendar, ml), New PropertySet(BasePropertySet.IdOnly, FolderSchema.TotalCount))

    ' Set the number of items to the smaller of the number of items in the Contacts folder Or 1000.
    Dim numItems As Integer = If(CalendarFolder.TotalCount < 1000, CalendarFolder.TotalCount, 1000)

    ' Instantiate the item view with the number of items to retrieve from the contacts folder.
    ' To keep the request smaller, send only the display name.
    Dim View As ItemView = New ItemView(numItems) With {.PropertySet = New PropertySet(BasePropertySet.IdOnly, AppointmentSchema.Subject, AppointmentSchema.End, AppointmentSchema.Start)}

    ' Create a searchfilter to check the subject of the tasks.
    Dim searchFilter As SearchFilter.SearchFilterCollection = New SearchFilter.SearchFilterCollection From {New SearchFilter.IsEqualTo(ItemSchema.Id, UnikId)}

    ' Retrieve the items in the Calendar folder with the properties you selected.
    Dim taskItems = Service.FindItems(New FolderId(WellKnownFolderName.Calendar, ml), searchFilter, View)

    If taskItems.Count = 1 AndAlso TypeOf taskItems.Items(0) Is Appointment Then
        Return taskItems.Items(0)
        HelperJournal.WriteEntry("Find Rdv by id") 'TODO:A mettre ne commentaire quand vérifier
    Else
        Return Nothing
    End If

End Function

我这样称呼它

Dim FoundTask As Appointment = FindAppointment(ConnectToExchange(), rdvEncours.ExchangeId)
If (FoundTask IsNot Nothing) Then FoundTask.Delete(DeleteMode.HardDelete)

但是 FindAppointment 出现错误

消息：La valeur spécifiée est non valide pour la propriété。 例外：Microsoft.Exchange.WebServices.Data.ServiceResponseException：La valeur spécifiée est non valide pour la propriété。 à Microsoft.Exchange.WebServices.Data.ServiceResponse.InternalThrowIfNecessary() à Microsoft.Exchange.WebServices.Data.ServiceResponse.ThrowIfNecessary() à Microsoft.Exchange.WebServices.Data.MultiResponseServiceRequest1.Execute() à Microsoft.Exchange.WebServices.Data.ExchangeService.FindItems[TItem](IEnumerable1 parentFolderIds, SearchFilter searchFilter, String queryString, ViewBase view, Grouping groupBy, ServiceErrorHandling errorHandlingMode) à Microsoft.Exchange.WebServices.Data.ExchangeService.FindItems(FolderId parentFolderId, SearchFilter searchFilter, ViewBase view) à Maximus.HelperAgenda.FindAppointment(ExchangeService Service, String UnikId) dans XXX\HelperAgenda.vb:ligne 50 à Maximus.VisuDevis.PoseInter(SetDevisRDV MesDonnees) dans XXX\VisuDevis.aspx.vb:ligne 560 Info Supplementaire :Suppression RDV dans calendrier

Answer 1

如果您有 ItemId，那么您可以直接绑定到日历项，实际属性不可搜索，因此无法在 findItems 中使用。但只需使用

Appointment aptItem = Appointment.Bind(service, ItemId);

也就是说，存储和绑定到 Itemid 可能会出现问题，请参阅 https://docs.microsoft.com/en-us/exchange/client-developer/exchange-web-services/ews-identifiers-in-exchange，因为这些 itemId 可以更改。

Answer 2

2020 年 4 月 6 日的 Glen cmets 是正确的回应 这里是总结

 Dim Appointment As New Appointment(service) With {
     .Subject = "MySubject",
     .Start = rdvEncours.DteInter,
     .Body = "MyBody",
     .Importance = Importance.High
 }
 Appointment.End = Appointment.Start.AddHours(1)
 Dim MaClef As String = getRandomString(256)
 Appointment.SetExtendedProperty(GetCustomKeyAppointment, MaClef)

 Appointment.Save(New FolderId(WellKnownFolderName.Calendar, rdvEncours.Collaborateur.Mail))
 rdvEncours.ExchangeId = MaClef
 LesDatas.SaveChanges()

而且，就像您需要在我的模块中为您的新自定义键提供一个参考一样

 ' Get the GUID for the property set.
Private Const MyCustomKeySetId As String = "XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX"

Public Function GetCustomKeyAppointment() As ExtendedPropertyDefinition
    Return New ExtendedPropertyDefinition(New Guid(MyCustomKeySetId), "Mykey", MapiPropertyType.String)
End Function

为了找到你的约会

 Public Function FindAppointment(Service As ExchangeService, UnikId As String) As Appointment
    Dim CalendarFolder As CalendarFolder = CalendarFolder.Bind(Service, New FolderId(WellKnownFolderName.Calendar, ml), New PropertySet(BasePropertySet.IdOnly, FolderSchema.TotalCount))

    ' Set the number of items to the smaller of the number of items in the Contacts folder Or 1000.
    Dim numItems As Integer = If(CalendarFolder.TotalCount < 1000, CalendarFolder.TotalCount, 1000)

    ' Instantiate the item view with the number of items to retrieve from the contacts folder.
    ' To keep the request smaller, send only the display name.
    Dim View As ItemView = New ItemView(numItems) With {.PropertySet = New PropertySet(BasePropertySet.IdOnly, AppointmentSchema.Subject, AppointmentSchema.End, AppointmentSchema.Start)}

    ' Create a searchfilter to check the subject of the tasks.
    Dim searchFilter As SearchFilter = New SearchFilter.IsEqualTo(GetCustomKeyAppointment, UnikId)

    ' Retrieve the items in the Calendar folder with the properties you selected.
    Dim taskItems = Service.FindItems(New FolderId(WellKnownFolderName.Calendar, ml), searchFilter, View)

    If taskItems.Count = 1 AndAlso TypeOf taskItems.Items(0) Is Appointment Then
        Return taskItems.Items(0)

    Else
        Return Nothing
    End If

End Function