问题描述
我正在寻找一种将xml流转换为csv的方法,但是我只找到1个集合的解决方案,即我的xml看起来像这样:
<?xml version="1.0" encoding="UTF-8"?>
<CompactData>
<Header>
<ID>id_ofç=_file</ID>
<Test>false</Test>
</Header>
<data:DataSet>
<data:Series FREQ="M" item="item1" unit="unit1">
<data:Obs TIME_PERIOD="2015-01" OBS_VALUE="5.47" />
<data:Obs TIME_PERIOD="2015-02" OBS_VALUE="5.01" />
<data:Obs TIME_PERIOD="2015-03" OBS_VALUE="5.39" />
</data:Series>
<data:Series FREQ="M" item="item2" unit="unit2">
<data:Obs TIME_PERIOD="2015-01" OBS_VALUE="5.47" />
<data:Obs TIME_PERIOD="2015-02" OBS_VALUE="5.01" />
<data:Obs TIME_PERIOD="2015-03" OBS_VALUE="5.39" />
</data:Series>
</data:DataSet>
</CompactData>
在这里,我要使用以下格式的csv:
FREQ,item,unit,TIME_PERIOD,OBS_VALUE
什么是最好的方法? 谢谢!
解决方法
尝试以下操作:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Xml;
using System.Xml.Linq;
using System.IO;
namespace ConsoleApplication166
{
class Program
{
const string XML_FILENAME = @"c:\temp\test.xml";
const string CSV_FILENAME = @"c:\temp\test.csv";
static void Main(string[] args)
{
StreamWriter writer = new StreamWriter(CSV_FILENAME);
writer.WriteLine(string.Join(",",new string[] {"FREQ","item","unit","TIME_PERIOD","OBS_VALUE"}));
XDocument doc = XDocument.Load(XML_FILENAME);
XElement dataSet = doc.Descendants().Where(x => x.Name.LocalName == "DataSet").FirstOrDefault();
XNamespace nsData = dataSet.GetNamespaceOfPrefix("data");
foreach (XElement series in dataSet.Elements(nsData + "Series"))
{
string freq = (string)series.Attribute("FREQ");
string item = (string)series.Attribute("item");
string unit = (string)series.Attribute("unit");
foreach (XElement obs in series.Elements(nsData + "Obs"))
{
DateTime time = DateTime.ParseExact((string)obs.Attribute("TIME_PERIOD"),"yyyy-MM",System.Globalization.CultureInfo.InvariantCulture);
double value = (double)obs.Attribute("OBS_VALUE");
writer.WriteLine(string.Join(",new string[] {freq,item,unit,time.ToString(),value.ToString()}));
}
}
writer.Flush();
writer.Close();
}
}
}