使用EWS创建扩展属性并从Outlook加载项访问它 [英] Creating extended property using EWS and access it from Outlook Add-in
问题描述
我目前正在EWS上进行一些公司应用程序与Exchange 2010的集成.但是最近我尝试在创建约会时添加一些自定义/扩展属性，以下是我添加扩展属性的代码.
I am currently working on EWS to have some integration of our company application with Exchange 2010. I am using EWS to create appoinment to Exchange 2010 and it works fine; but recently I tried to add some custom/extended property when creating the appointment, below is my code to add the extended property.
Dim customField As New ExtendedPropertyDefinition(DefaultExtendedPropertySet.PublicStrings, "MyCustomField", MapiPropertyType.String)
appointment.SetExtendedProperty(customField, "CustomFieldValue")
以上代码能够创建约会的自定义字段.
The above codes able to create the custom field to the appointment.
现在这是我的问题.当我在创建的Outlook中打开约会并转到开发人员>设计此表单"，然后转到所有字段"选项卡时，我只看到在文件夹中的用户定义字段"中创建的自定义字段，而在此项目中的用户定义字段".
Now here is my problem. When I open up the appointment in Outlook that I created and go to "Developer > Design This Form", then "All Fields" tab, I only see the custom field I created in the "User-defined field in folder" but not in "User-defined field in this item".
当用户在Outlook中打开约会时，当我尝试查找自定义字段时，我也制作了一个Outlook加载项以响应我使用EWS创建的自定义字段，找不到自定义字段，因为自定义字段是在文件夹中的用户定义的字段"中创建的，而不是在此项目中的用户定义的字段"中创建的.
I also making an Outlook Add-in to react to the custom field that I created using the EWS when user opens up the appointment in Outlook, when I tried to look for the custom field, couldn't find the custom field, because the custom field is created in "User-defined field in folder" but not in "User-defined field in this item".
这是Outlook加载项中的代码，将在用户在Outlook中打开一个约会时执行.但是由于自定义字段不在此项目中"，因此.Find()返回Nothing.
This is the codes in the Outlook Add-in and will execute when user opens an apointment in Outlook. But because the custom field is not in "in this item", the .Find() returns Nothing.
Dim appt As Outlook.AppointmentItem
appt = TryCast(inspector.CurrentItem, Outlook.AppointmentItem)
If appt.UserProperties.Find("MyCustomField") Is Nothing Then
'Some action
Else
'Some action
End If
我想要实现的是使用EWS使用自定义字段(扩展属性)创建约会，然后在用户在Outlook中打开约会时读取Outlook加载项中的自定义字段(扩展属性).
What I want to achieve is to create an appointment with the custom field (extended property) using EWS, and then read the custom field (extended property) in Outlook Add-in when user open the appointment in Outlook.
我使用EWS分配给自定义字段的值显示在文件夹中的用户定义的字段"中.如何从Outlook加载项中检索值?也许我可以检索该值，然后将自定义字段添加到该项目中并添加该值?
The value that I assigned to the custom field using EWS is shown in the "User-defined field in folder". How do I retrieve the value from my Outlook Add-in? Maybe I can retrieve the value and add the custom field to the item and with the value?
谢谢.
推荐答案
无法使用用户属性访问EWS创建的扩展属性.但是可以使用PropertyAccessor进行访问.
Can't access the extended property created by EWS using UserProperties. But can access using PropertyAccessor.
outlookItem.PropertyAccessor.GetProperty("http://schemas.microsoft.com/mapi/string/{00020329-0000-0000-C000-000000000046}/yourProp")
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