HL7 2.6解析转XML(C#版)
项目中需要解析HL7，所以在网上找到解析代码，但错误很多，所以我修改了一下，测试好用。
using System;
using System.Collections.Generic;
using System.Text;
using System.Xml;
using System.Text.RegularExpressions;
namespace PT.Common
{
/// <summary>
/// HL7解析器
/// </summary>
public static class HL7ToXmlConverter
{
private static XmlDocument _xmlDoc;
/// <summary>
/// 把HL7信息转成XML形式
/// 分隔顺序 \n,|,~,^,&
/// </summary>
/// <param name="sHL7">HL7字符串</param>
/// <returns></returns>
public static string ConvertToXml(string sHL7)
{
_xmlDoc = ConvertToXmlObject(sHL7);
return _xmlDoc.OuterXml;
}
/// <summary>
/// 通过|分隔
/// </summary>
/// <param name="s"></param>
/// <returns></returns>
private static string[] GetMessgeFields(string s)
{
return s.Split('|');
}
/// <summary>
/// 通过^分隔
/// </summary>
/// <param name="s"></param>
/// <returns></returns>
private static string[] GetComponents(string s)
{
return s.Split('^');
}
/// <summary>
/// 通过某连接符分隔
/// </summary>
/// <param name="s"></param>
/// <returns></returns>
private static string[] GetSubComponents(string s)
{
return s.Split('&');
}
/// <summary>
/// 通过~分隔 重复
/// </summary>
/// <param name="s"></param>
/// <returns></returns>
private static string[] GetRepetitions(string s)
{
return s.Split('~');
}
/// <summary>
/// 创建XML对象
/// </summary>
/// <returns></returns>
private static XmlDocument CreateXmlDoc()
{
XmlDocument output = new XmlDocument();
XmlElement rootNode = output.CreateElement("HL7Message");
output.AppendChild(rootNode);
return output;
}
/// <summary>
/// 读取XML某节点值
/// </summary>
/// <param name="xmlObject"></param>
/// <param name="path"></param>
/// <returns></returns>
public static string GetText(XmlDocument xmlObject, string path)
{
XmlNode node = xmlObject.DocumentElement.SelectSingleNode(path);
if (node != null)
{
return node.InnerText;
}
else
{
return null;
}
}
/// <summary>
/// 读取XML某节点组的第index项
/// </summary>
/// <param name="xmlObject"></param>
/// <param name="path"></param>
/// <param name="index"></param>
/// <returns></returns>
public static string GetText(XmlDocument xmlObject, string path, int index)
{
XmlNodeList nodes = xmlObject.DocumentElement.SelectNodes(path);
if (index <= nodes.Count)
{
return nodes[index].InnerText;
}
else
{
return null;
}
}
/// <summary>
/// 读取XML某节点组
/// </summary>
/// <param name="xmlObject"></param>
/// <param name="path"></param>
/// <returns></returns>
public static String[] GetTexts(XmlDocument xmlObject, string path)
{
XmlNodeList nodes = xmlObject.DocumentElement.SelectNodes(path);
String[] arr = new String[nodes.Count];
int index = 0;
foreach (XmlNode node in nodes)
{
arr[index++] = node.InnerText;
}
return arr;
}
/// <summary>
/// HL7字符串转XML
/// </summary>
/// <param name="sHL7"></param>
/// <returns></returns>
public static XmlDocument ConvertToXmlObject(string sHL7)
{
_xmlDoc = CreateXmlDoc();
//把HL7分成段
string[] sHL7Lines = sHL7.Split('\r');//经过测试，TCP方式接收的用\r分隔，webService方式接收的用\n分隔
//过滤一些字符
//for (int i = 0; i < sHL7Lines.Length; i++)
//{
// sHL7Lines[i] = Regex.Replace(sHL7Lines[i], @"[^ -~]", "");
//}
//遍历每一段
for (int i = 0; i < sHL7Lines.Length; i++)
{
// 判断是否空行
if (sHL7Lines[i] != string.Empty)
{
string sHL7Line = sHL7Lines[i];//某一段
//通过“|”分隔
string[] sFields = HL7ToXmlConverter.GetMessgeFields(sHL7Line);
// 为段（一行）创建第一级节点
XmlElement el = _xmlDoc.CreateElement(sFields[0]);
_xmlDoc.DocumentElement.AppendChild(el);
//遍历每个“|”与“|”间的内容
for (int a = 0; a < sFields.Length; a++)
{
// 为字段创建第二级节点
XmlElement fieldEl = _xmlDoc.CreateElement(sFields[0] + "." + a.ToString());
//是否包括HL7的连接符
if (sFields[a] != @"^~\&")//0:如果这一行有任何分隔符，继续分隔。如果没有任何分隔符，可以直接写节点值。
{
//通过"~"分隔
string[] sComponents = HL7ToXmlConverter.GetRepetitions(sFields[a]);
if (1==1)//1:如果可以用“~”分隔，继续分隔；如果没有“~”符，开始用“~”分隔。不管有没有"~"符，都循环分隔
{
for (int b = 0; b < sComponents.Length; b++)
{
XmlElement componentEl = _xmlDoc.CreateElement(sFields[0] + "." + a.ToString() + "." + b.ToString());
//通过"^"分隔
string[] subComponents = GetComponents(sComponents[b]);
if (subComponents.Length > 1)//2.如果有字组，大部分是没有的
{
for (int c = 0; c < subComponents.Length; c++)
{
//修改了一个错误
string[] subComponentRepetitions = GetSubComponents(subComponents[c]);
if (subComponentRepetitions.Length > 1)
{
for (int d = 0; d < subComponentRepetitions.Length; d++)
{
XmlElement subComponentRepEl = _xmlDoc.CreateElement(sFields[0] + "." + a.ToString() + "." + b.ToString() + "." + c.ToString() + "." + d.ToString());
subComponentRepEl.InnerText = subComponentRepetitions[d];
componentEl.AppendChild(subComponentRepEl);
}
}
else
{
XmlElement subComponentEl = _xmlDoc.CreateElement(sFields[0] + "." + a.ToString() + "." + b.ToString() + "." + c.ToString());
subComponentEl.InnerText = subComponents[c];
componentEl.AppendChild(subComponentEl);
}
}
fieldEl.AppendChild(componentEl);
}
else //2.如果没有字组了，大部分是没有
{
string[] sRepetitions = HL7ToXmlConverter.GetSubComponents(sComponents[b]);
if (sRepetitions.Length > 1)
{
XmlElement repetitionEl = null;
for (int c = 0; c < sRepetitions.Length; c++)
{
repetitionEl = _xmlDoc.CreateElement(sFields[0] + "." + a.ToString() + "." + b.ToString() + "." + c.ToString());
repetitionEl.InnerText = sRepetitions[c];
componentEl.AppendChild(repetitionEl);
}
fieldEl.AppendChild(componentEl);
el.AppendChild(fieldEl);
}
else
{
componentEl.InnerText = sComponents[b];
fieldEl.AppendChild(componentEl);
el.AppendChild(fieldEl);
}
}
}
el.AppendChild(fieldEl);
}
}
else
{
//0:如果不可以分隔，可以直接写节点值了。
fieldEl.InnerText = sFields[a];
el.AppendChild(fieldEl);
}
}
}
}
return _xmlDoc;
}
//测试方法转XML
//string sHL7asXml = PT.Common.HL7ToXmlConverter.ConvertToXml(hl7Data);
//ThreadUPtextBoxMsg(textBoxMsgAppendText, "\r\n[解析HL7消息]" + sHL7asXml);
XmlDocument xmlObject = PT.Common.HL7ToXmlConverter.ConvertToXmlObject(hl7Data);
String chuang1 = PT.Common.HL7ToXmlConverter.GetText(xmlObject, "PV1/PV1.6/PV1.6.0/PV1.6.0.2", 0);
String chuang2 = PT.Common.HL7ToXmlConverter.GetText(xmlObject, "PV1/PV1.3/PV1.3.0/PV1.3.0.2", 0);
ThreadUPtextBoxMsg(textBoxMsgAppendText, "\r\n[解析HL7消息为XML]" + name + "从" + chuang1 + "床换到" + chuang2 + "床");
}
}
解析后的XML，可读性比较差。
C#格式化XML的代码：
/// <summary>
/// 格式化XML(C#版)
/// </summary>
/// <param name="sUnformattedXml"></param>
/// <returns></returns>
public static string FormatXml(string sUnformattedXml)
{
XmlDocument xd = new XmlDocument();
xd.LoadXml(sUnformattedXml);
StringBuilder sb = new StringBuilder();
StringWriter sw = new StringWriter(sb);
XmlTextWriter xtw = null;
try
{
xtw = new XmlTextWriter(sw);
xtw.Formatting = Formatting.Indented;
xtw.Indentation = 1;
xtw.IndentChar = '\t';
xd.WriteTo(xtw);
}
finally
{
if (xtw != null)
xtw.Close();
}
return sb.ToString();
}
