Question

例如我有一个开关盒，我输入＆＃34; 1＆＃34;然后它会提示用户输入特定的口袋，如果我输入＆＃34; ClientLoginRequest＆＃34;在客户端消息包内，它应该输出一个字符串，其值为＆＃34; CLIENTPC_LOGIN_RESPONSE＆＃34;我怎么做？我的代码只能输出某个节点及其元素，例如它输出程序定义的ConnectionPackets，因此输出为

以下是代码......

        using System;
        using System.Collections.Generic;
        using System.Linq;
        using System.Text;
        using System.Xml;
        using System.Threading.Tasks;
        using System.IO;
        using System.Xml.Linq;

        namespace Packets
        {
            class Program
            {
                static void Main(string[] args)
                {
                    string result = "C:\\Users\\Ivan.Apungan\\Documents\\PacketTypes.xml";


                    using (var stream = new StringReader(result))
                    {
                        XDocument xmlfile = XDocument.Load(result);

                        var query = from c in xmlfile.Descendants("ConnectionPackets") select c;

                        foreach (var item in query)
                        {
                            Console.WriteLine(item.ToString());
                        }


                    }
                    Console.ReadLine();
                }
            }
        }

这是xml文件。

    <? xml version="1.0" encoding="utf-8" ?>

    <Packets>

      <ConnectionPackets>
        <PacketType name = "Handshake" > HANDSHAKE </ PacketType >
        < PacketType name="HandshakeAcknowledgement">HANDSHAKE_ACKNOWLEDGEMENT</PacketType>
      </ConnectionPackets>

      <ClientMessagePackets>
        <PacketType name = "ClientLoginRequest" > CLIENTPC_LOGIN_REQUEST </ PacketType >
        < PacketType name="ClientLoginResponse">CLIENTPC_LOGIN_RESPONSE</PacketType>
      </ClientMessagePackets>

    </Packets>

例如我有一个开关盒，我输入＆＃34; 1＆＃34;然后它会提示用户输入特定的口袋，如果我输入＆＃34; ClientLoginRequest＆＃34;在客户端消息包内，它应该输出一个字符串，其值为＆＃34; CLIENTPC_LOGIN_RESPONSE＆＃34;我怎么做？我的代码只能输出某个节点及其元素，例如它输出程序定义的ConnectionPackets，因此输出为

  <ConnectionPackets>
    <PacketType name = "Handshake" > HANDSHAKE </ PacketType >
    < PacketType name="HandshakeAcknowledgement">HANDSHAKE_ACKNOWLEDGEMENT</PacketType>
  </ConnectionPackets>

Answer 1

使用System.Xml.Linq扩展来查询xml文档非常简单。如果误解了你的问题，请告诉我。

class Program
{
    static void Main(string[] args)
    {
        string command = string.Empty;

        while (command != "exit")
        {
            XDocument xml = XDocument.Parse(xmlString);

            Console.WriteLine("Find packet: ");
            command = Console.ReadLine();

            var element = xml
                  .Descendants()
                  .FirstOrDefault(x => x.Attribute("name")?.Value == command);

            if (element == null)
            {
                Console.WriteLine("Not found");
            }
            else
            {
                Console.WriteLine(element.Value);
            }

            Console.WriteLine(new string('-', 20));

        }
    }

    static string xmlString = @"<?xml version=""1.0"" encoding=""utf-8"" ?>
                            <Packets>
                              <ConnectionPackets>
                                <PacketType name=""Handshake""> HANDSHAKE </PacketType >
                                <PacketType name=""HandshakeAcknowledgement"">HANDSHAKE_ACKNOWLEDGEMENT</PacketType>
                              </ConnectionPackets>

                              <ClientMessagePackets>
                                <PacketType name=""ClientLoginRequest"" > CLIENTPC_LOGIN_REQUEST </PacketType >
                                <PacketType name=""ClientLoginResponse"">CLIENTPC_LOGIN_RESPONSE</PacketType>
                              </ClientMessagePackets>

                            </Packets>";

}

C＃XML reader搜索特定的数据包和返回标识符

1 个答案: