解析来自TCP / IP连接的XML字符串

Question

I need to parse standard XML structures coming from a TCP/IP connection. The data is kept as a string variable. This means that in any given time the data in my hand can be incomplete (an incomplete XML structure), or a complete XML structure with incomplete leftover (the beginning of the next XML structure).

Most of the structures are not 'empty':

<Message>
  <Param1 value = "val1"/>
  <Param2 value = "val2"/>
</Message>

But there are also 'empty' ones:

<Message status="ack" />

So just searching for </Message> and making a split there is not good enough.

How can I part the complete structure from the next partial structure? Is there a cleaner solution other than creating my own state-machine for this and checking byte by byte?

Answer 1

You can use a dictionary for each message

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
using System.Xml.Linq;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            string input =
                "<Message>" +
                  "<Param1 value = \"val1\"/>" +
                  "<Param2 value = \"val2\"/>" +
                "</Message>" +
                "<Message>" +
                  "<Param1 value = \"val1\"/>" +
                  "<Param2 value = \"val2\"/>" +
                "</Message>";


            XElement message = 
                new XElement("Root", input);

            var results = message.Elements("Message")
                .Where(x => x.HasElements)
                .Select(x => x.Elements()
                    .GroupBy(y => y.Name.LocalName, z => z)
                    .ToDictionary(y => y.Key, z => (string)z.FirstOrDefault()
                        .Attribute("value")))
                .ToList();
        }
    }
}