Question

我使用 EventLogWatcher 来跟踪日志中的事件。程序停止/启动后，我需要保存/恢复书签事件。事件的书签由 EventBookmark 类https://docs.microsoft.com/en-us/dotnet/api/system.diagnostics.eventing.reader.eventbookmark?view=netframework-4.8表示，并且继承自ISerializable接口。但是我不能序列化该类的对象。因为它没有默认的ctor，所以ctor没有参数。我对 C＃不太熟悉，因为我一周使用一次。您能帮我理解为什么无法从该类的对象序列化为什么该类从ISerializable接口继承吗？对于我来说，这很奇怪，因为我听不懂什么，但我想知道。此外建设者 EventBookmark（SerializationInfo，StreamingContext）和 GetObjectData（SerializationInfo，StreamingContext）受保护。

那么，如何序列化和反序列化 EventBookmark 类的对象？

已更新（工作代码），谢谢jdweng的帮助

namespace ConsoleApp
{
    using System;

    public class Program
    {
        static void Main(string[] args)
        {
            string logName = "Application";
            string filter = "*";
            System.Diagnostics.Eventing.Reader.EventLogQuery eventQuery = new System.Diagnostics.Eventing.Reader.EventLogQuery(
                logName,
                System.Diagnostics.Eventing.Reader.PathType.LogName,
                filter
            );
            System.Diagnostics.Eventing.Reader.EventLogReader eventLogReader = new System.Diagnostics.Eventing.Reader.EventLogReader(eventQuery);
            System.Diagnostics.Eventing.Reader.EventRecord eventRecord = eventLogReader.ReadEvent();
            System.Diagnostics.Eventing.Reader.EventBookmark eventBookmark = eventRecord.Bookmark;
            if (eventBookmark != null)
            {
                System.Runtime.Serialization.IFormatter formatter = new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter();
                System.IO.Stream stream = new System.IO.MemoryStream();
                formatter.Serialize(stream, eventBookmark);
                stream.Position = 0;
                System.IO.StreamReader reader = new System.IO.StreamReader(stream);
                string result = reader.ReadToEnd();
                Console.WriteLine("event bookmark: {0}", result);
                stream.Position = 0;
                System.Diagnostics.Eventing.Reader.EventBookmark newEventBookmark = (System.Diagnostics.Eventing.Reader.EventBookmark)formatter.Deserialize(stream);
                if (newEventBookmark != null/* && eventBookmark.Equals(newEventBookmark)*/)
                {
                    Console.WriteLine("Deserialization successfully passed");
                }
                else
                {
                    Console.WriteLine("Deserialization failed");
                }
            }
            else
            {
                Console.WriteLine("cannot read event bookmark");
            }
            Console.ReadKey();
        }
    }
}

C＃：如何序列化/反序列化EventBookmark类的对象

0 个答案: