Exchange Web 服务 (EWS) C# - 获取类别列表

Question

我可以使用 item.Categories、

为邮箱的每个项目获取一个类别

有谁知道是否可以在我的邮箱中获取唯一的类别列表？

我认为这可能是不可能的，但如果有人以前做到过，我将不胜感激。

Answer 1

类别列表作为隐藏对象存储在默认日历文件夹中。您可以使用配置名称 "CategoryList"（其 XML 属性）的 GetUserConfiguration 请求来请求它。这在 Exchange 2010 及更高版本上对我有用。

抱歉，我无法提供任何代码示例，但我不懂 C#。

Answer 2

由于@frangge 建议使用以下代码，我最近有同样的要求找到了我正在寻找的东西，包括解决一个奇怪的错误，在某些响应中有一些不可预测的前导字符。

using Flurl;
using Microsoft.Exchange.WebServices.Data;

...

        public Categories GetCategories()
        {
            System.Net.ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls; 
            string ewsUrl = RootUrl.AppendPathSegment("EWS/Exchange.asmx");

            ExchangeService ewsservice = new Microsoft.Exchange.WebServices.Data.ExchangeService
            {
                Credentials = new System.Net.NetworkCredential(Username, Password),
                Url = new Uri(ewsUrl)
            };
            UserConfiguration usrConfig = UserConfiguration.Bind(ewsservice,
                                                                     "CategoryList",
                                                                     WellKnownFolderName.Calendar,
                                                                     UserConfigurationProperties.All);
            byte[] xmlData = usrConfig.XmlData;
            //found some nasty leading chars in XmlData which was breaking deserialization
            //it looked something like ï»À<?xml version... o worse an unprintable char
            if (usrConfig.XmlData[0].Equals(239) && usrConfig.XmlData[1].Equals(187) && usrConfig.XmlData[2].Equals(191))
            {
                xmlData = usrConfig.XmlData.Skip(3).ToArray();
            }
            string xml = Encoding.UTF8.GetString(xmlData);
            XmlSerializer serializer = new XmlSerializer(typeof(Categories));
            using (StringReader reader = new StringReader(xml))
            {
                var categories = (Categories)serializer.Deserialize(reader);
                return categories;
            }
        }

类别定义为

    [XmlRoot(ElementName = "categories", Namespace = "CategoryList.xsd")]
    public class Categories
    {
        [XmlElement(ElementName = "category")]
        public List<Category> Category { get; set; }

        [XmlAttribute(AttributeName = "default")]
        public string Default { get; set; }

        [XmlAttribute(AttributeName = "lastSavedSession")]
        public int LastSavedSession { get; set; }

        [XmlAttribute(AttributeName = "lastSavedTime")]
        public DateTime LastSavedTime { get; set; }

        [XmlAttribute(AttributeName = "xmlns")]
        public string Xmlns { get; set; }
    }

Exchange Web 服务 (EWS) C# - 获取类别列表

Exchange Web Services (EWS) C# - Get list of categories

c#

email

categories

exchangewebservices