从XML文档C＃中读取数据 [英] Read data from XML document C#

问题描述

我的代码在下面提到我将数据加载到xml文档中。



XmlDocument doc = new XmlDocument（）;

string xml = Encoding.UTF8.GetString（resty.Data）;

doc.LoadXml（xml）;



innser xml包含：

my code is mentioned below where i load the data into xml document.

XmlDocument doc = new XmlDocument();
string xml = Encoding.UTF8.GetString(resty.Data);
doc.LoadXml(xml);

innser xml contains:

<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/"><s:Body><VerifyFingerPrintsResponse xmlns="http://NADRA.Biometric.Verification"><VerifyFingerPrintsResult><?xml version="1.0" encoding="utf-16"?>

<BIOMETRIC_VERIFICATION xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">

  <RESPONSE_DATA>

    <RESPONSE_STATUS>

      <CODE>175</CODE>

      <MESSAGE>transaction id already exist</MESSAGE>

    </RESPONSE_STATUS>

    <SESSION_ID>12313</SESSION_ID>

    <CITIZEN_NUMBER>4220106957335</CITIZEN_NUMBER>

  </RESPONSE_DATA>

</BIOMETRIC_VERIFICATION></VerifyFingerPrintsResult></VerifyFingerPrintsResponse></s:Body></s:Envelope>

内文：

inner text :

<?xml version="1.0" encoding="utf-16"?>

<BIOMETRIC_VERIFICATION xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">

  <RESPONSE_DATA>

    <RESPONSE_STATUS>

      <CODE>175</CODE>

      <MESSAGE>transaction id already exist</MESSAGE>

    </RESPONSE_STATUS>

    <SESSION_ID>12313</SESSION_ID>

    <CITIZEN_NUMBER>4220106957335</CITIZEN_NUMBER>

  </RESPONSE_DATA>

</BIOMETRIC_VERIFICATION>

我尝试过：

What I have tried:

i want to retrieve data from above xml kindly  help me please

我将如何从上面的xml

how i will retrieve data from above xml

推荐答案

首先，您需要用于存储Xml数据的类。我找到 Xml2CSharp.com [ ^ ]有帮助。从Xml数据生成以下类：

First, you need classes to store the Xml data. I find Xml2CSharp.com[^] helps. Generates the following classes from your Xml data:

using System;
using System.Xml.Serialization;
using System.Collections.Generic;

namespace Xml2CSharp
{
	[XmlRoot(ElementName="RESPONSE_STATUS")]
	public class RESPONSE_STATUS {
		[XmlElement(ElementName="CODE")]
		public string CODE { get; set; }
		[XmlElement(ElementName="MESSAGE")]
		public string MESSAGE { get; set; }
	}

	[XmlRoot(ElementName="RESPONSE_DATA")]
	public class RESPONSE_DATA {
		[XmlElement(ElementName="RESPONSE_STATUS")]
		public RESPONSE_STATUS RESPONSE_STATUS { get; set; }
		[XmlElement(ElementName="SESSION_ID")]
		public string SESSION_ID { get; set; }
		[XmlElement(ElementName="CITIZEN_NUMBER")]
		public string CITIZEN_NUMBER { get; set; }
	}

	[XmlRoot(ElementName="BIOMETRIC_VERIFICATION")]
	public class BIOMETRIC_VERIFICATION {
		[XmlElement(ElementName="RESPONSE_DATA")]
		public RESPONSE_DATA RESPONSE_DATA { get; set; }
		[XmlAttribute(AttributeName="xsi", Namespace="http://www.w3.org/2000/xmlns/")]
		public string Xsi { get; set; }
		[XmlAttribute(AttributeName="xsd", Namespace="http://www.w3.org/2000/xmlns/")]
		public string Xsd { get; set; }
	}

}

接下来是将类映射到Xml数据：

Next is to map the classes to the Xml data:

using System;
using System.Collections.Generic;
using System.IO;
using System.Xml;
using System.Xml.Serialization;

namespace Xml2CSharp
{
    public static class XmlConverter
    {
        public static T ToClass<T>(string data)
        {
            var response = default(T);

            if (!string.IsNullOrEmpty(data))
            {
                var settings = new XmlReaderSettings() { IgnoreWhitespace = true };
                var serializer = XmlSerializerFactoryNoThrow.Create(typeof(T));
                var reader = XmlReader.Create(new StringReader(data), settings);
                response = (T)Convert.ChangeType(serializer.Deserialize(reader), typeof(T));
            }
            return response;
        }
    }

    // ref: http://stackoverflow.com/questions/1127431/xmlserializer-giving-filenotfoundexception-at-constructor/39642834#39642834
    public static class XmlSerializerFactoryNoThrow
    {
        public static Dictionary<Type, XmlSerializer> cache = new Dictionary<Type, XmlSerializer>();

        private static object SyncRootCache = new object();

        public static XmlSerializer Create(Type type)
        {
            XmlSerializer serializer;

            lock (SyncRootCache)
                if (cache.TryGetValue(type, out serializer))
                    return serializer;

            lock (type) //multiple variable of type of one type is same instance
            {
                //constructor XmlSerializer.FromTypes does not throw the first chance exception           
                serializer = XmlSerializer.FromTypes(new[] { type })[0];
                //serializer = XmlSerializerFactoryNoThrow.Create(type);
            }

            lock (SyncRootCache) cache[type] = serializer;
            return serializer;
        }
    }
}

使用：

var data = XmlConverter.ToClass<BIOMETRIC_VERIFICATION>(xml);

注意：我没有运行此代码但应该可以工作。

Note: I have not run this code but should work.

查看此页面上的示例：



XmlDocument Class（System.Xml） [ ^ ]

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