通过EWS加载扩展属性 [英] Loading extended properties via EWS

问题描述

我可以在属性集中指定扩展属性，作为finditems查询视图的一部分。但是，当我使用类似的方法来读取EmailMessage的扩展属性时，我已经明确加载了相同的属性，我无法引用它们。

I can read extended properties when specifying them in a property set  as part of the view of  a finditems query. However, when I use a similar approach to read extended properties of an EmailMessage I have explicitly loaded with the same properties I can't refer to them.

正确的加载方式是什么？参考 扩展属性？

What is the correct way to load and reference extended properties?

谢谢

Phil。

 

private 静态 void ProcessEmail（ EmailMessage 邮件）

{

private static void ProcessEmail(EmailMessage mail)

{

 

 

PropertySet ps = new PropertySet （ < span style ="color：＃2b91af; font-size：x-small"> BasePropertySet .FirstClassProperties）;

ps.Add（

PropertySet ps = new PropertySet(BasePropertySet.FirstClassProperties);

ps.Add(

new ExtendedPropertyDefinition （MyPropertySetId， " MyProp" ， MapiPropertyType 。字符串））;

// ...添加一些其他自定义属性

mail.Load（ps）;

mail.Load(ps);

 

string test = mail.ExtendedProperties [0] .PropertyDefinition.Name + " " + mail.ExtendedProperties [0] .Value; 

//在线上方工作，但如果我必须找到每个项目 $，这很乏味b $ b

 

// above line works but tedious if I have to find each item

 

ExtendedPropertyDefinition df = new ExtendedPropertyDefinition （MyPropertySetId， " MyProp" ， MapiPropertyType 。字符串）;

 

ExtendedPropertyDefinition df = new ExtendedPropertyDefinition(MyPropertySetId, "MyProp", MapiPropertyType.String);

 

对象   myPropObj = null ;

mail.TryGetProperty（df，

object myPropObj = null;

mail.TryGetProperty(df,

out myPropObj）; //总是空的???

}

 

推荐答案

我无法重现您的问题。以下代码对我来说很合适：

I cannot reproduce your problem. The following code works just fine for me:

Guid myPropGuid = new Guid("{A71E6D47-619E-45ed-9CEF-23788EB5D057}");
ExtendedPropertyDefinition myProp = new ExtendedPropertyDefinition(
    myPropGuid,
    "MyProp",
    MapiPropertyType.String);

// First create a message with the extended property set
EmailMessage message = new EmailMessage(service);
message.Subject = "Test EP";
message.SetExtendedProperty(myProp, "Test");
message.Save();

// Now verify we can retrieve the extended property
EmailMessage otherMessage = EmailMessage.Bind(
    service,
    message.Id,
    new PropertySet(myProp));

// First with the indexer
try
{
    Console.WriteLine("Using the indexer: " + otherMessage[myProp].ToString());
}
catch
{
    Console.WriteLine("Unable to get the property value with the indexer.");
}

// Then with TryGetPropertyValue
object propValue;

if (otherMessage.TryGetProperty(myProp, out propValue))
{
    Console.WriteLine("Using TryGetProperty: " + propValue.ToString());
}
else
{
    Console.WriteLine("Unable to get the property value with TryGetProperty.");
}

Console.ReadLine();

 

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