我正在尝试解析一些xml文件（使用LINQ）以使用该数据存储在DB中。以下是其中一个服务的格式，其中有几个更多，每个都有不同的节点模式和结构。
有没有办法概括这种方法，以便我可以通过单个方法/代码行迭代所有这些服务？没有被childNodes的安排困扰？
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<deviceState>
<id>203948-2908093-203984902-29348020-290lk</id>
<device>Mirron</device>
<variable>
<id>Plug - Meter.VI</id>
<text>
<textValue>
<value>0.000000</value>
</textValue>
</text>
</variable>
<variable>
<id>AEB</id>
<text>
<textStr>-</textStr>
</text>
</variable>
<variable>
<id>DESCRIPTION</id>
<text>
<textStr />
</text>
</variable>
<variable>
<id>VDTTM</id>
<text>
<textDate>
<date>01042016103658</date>
</textDate>
</text>
</variable>
<variable>
<id>STATUS</id>
<text>
<textValue>
<value>1.000000</value>
</textValue>
</text>
</variable>
</deviceState>
我想实现一个功能，我可以通过指定搜索过滤器来访问每个变量id的值，然后直接访问它的值，而不会被以下无意义的标记所困扰。
<text><textValue> or <text><textDate> or <text><textStr/> or <text>
<textvalue><value>
new devices {a.id=node("id"), a.value=node("valu")}。
目前我正在使用以下代码来实现这一技巧，但它的速度和可管理性都不高效。
XDocument x = XDocument.Parse(_back);
string back = "";
string xvalue, yvalue;
foreach (XElement xe in x.Descendants().Take(1))
{
var s = xe.Value.IndexOf("Plug - Meter.VI");
var val = xe.Value.Substring(s, 25);
back= val.Substring(val.LastIndexOf("I")+1, 10);
break;
}
任何指导都将受到高度赞赏。感谢
根据Monty的反馈，这就是我正在使用的。
public protoDCM_CornerL08UMS_View()
{
InitializeComponent();
synchronizationContext = SynchronizationContext.Current;
StartingMeter();
}
private async void StartingMeter()
{
string val="0";
max = min = 0;
await Task.Run(() =>
{
do
{
UpdateUI(val,max,min);
val = fetchData();
Double temp =0;
if (Double.TryParse(val,out temp))
{
if(min==0&&max==0)
{
min = max = temp;
}
if(temp>max)
{
max = temp;
}
if(temp<min)
{
min = temp;
}
}
val = temp.ToString();
}
while (true);
});
}
private void UpdateUI(string value, Double _max , Double _min)
{
var timeNow = DateTime.Now;
if ((DateTime.Now - previousTime).Milliseconds <= 50) return;
synchronizationContext.Post(new SendOrPostCallback(o =>
{
lblInstant.Text= (string)o;
}), value);
synchronizationContext.Post(new SendOrPostCallback(o =>
{
lblMax.Text = (string)o;
}), _max.ToString());
synchronizationContext.Post(new SendOrPostCallback(o =>
{
lblMin.Text = (string)o;
}), _min.ToString());
previousTime = timeNow;
}
public Stream GenerateStreamFromString(string s)
{
MemoryStream stream = new MemoryStream();
StreamWriter writer = new StreamWriter(stream);
writer.Write(s);
writer.Flush();
stream.Position = 0;
return stream;
}
private string fetchData()
{
String _back = HttpGet("http://xxx.xxx.xxx"+Global.Node.Current.Device.Address+"/services/devices/deviceState.xml?id=D83AE139-E0C9-4B15-B2A9-6E0B57B28ED1?type=ALL");
//_back = FormatXML(Response);
try
{
DeviceState deserializedXML = new DeviceState();
XmlSerializer serializer = new XmlSerializer(typeof(DeviceState));
using (Stream stream = GenerateStreamFromString(_back))
{
deserializedXML = (DeviceState)serializer.Deserialize(stream);
var x = (from z in deserializedXML.Variable
where z.Id == "Plug - Meter.VI"
select new
{
Id = z.Id,
value= (z.Text.TextDate == null?
(z.Text.TextStr == null
? (z.Text.TextValue == null
? "No Text Value!" : z.Text.TextValue.Value.ToString()) : z.Text.TextStr.ToString()) : z.Text.TextDate.Date.ToString()) }).FirstOrDefault();
return x.value;
}
}
catch (Exception w)
{
MessageBox.Show(w.ToString());
return "0.0";
}
}
public static string HttpGet(string URI)
{
try
{
System.Net.WebRequest req = System.Net.WebRequest.Create(URI);
req.Method = "GET";
System.Net.WebResponse resp = req.GetResponse();
System.IO.StreamReader sr = new System.IO.StreamReader(resp.GetResponseStream());
return sr.ReadToEnd().Trim();
}
catch (Exception sl)
{
return sl.ToString();
}
}
答案 0 :(得分：1)
试试这个......
Usings
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Xml.Serialization;
类
[XmlRoot(ElementName = "textValue")]
public class TextValue
{
[XmlElement(ElementName = "value")]
public string Value { get; set; }
}
[XmlRoot(ElementName = "text")]
public class Text
{
[XmlElement(ElementName = "textValue")]
public TextValue TextValue { get; set; }
[XmlElement(ElementName = "textStr")]
public string TextStr { get; set; }
[XmlElement(ElementName = "textDate")]
public TextDate TextDate { get; set; }
}
[XmlRoot(ElementName = "variable")]
public class Variable
{
[XmlElement(ElementName = "id")]
public string Id { get; set; }
[XmlElement(ElementName = "text")]
public Text Text { get; set; }
}
[XmlRoot(ElementName = "textDate")]
public class TextDate
{
[XmlElement(ElementName = "date")]
public string Date { get; set; }
}
[XmlRoot(ElementName = "deviceState")]
public class DeviceState
{
[XmlElement(ElementName = "id")]
public string Id { get; set; }
[XmlElement(ElementName = "device")]
public string Device { get; set; }
[XmlElement(ElementName = "variable")]
public List<Variable> Variable { get; set; }
}
码
try
{
DeviceState deserializedXML = new DeviceState();
// Deserialize to object
XmlSerializer serializer = new XmlSerializer(typeof(DeviceState));
using (FileStream stream = File.OpenRead(@"xml.xml"))
{
deserializedXML = (DeviceState)serializer.Deserialize(stream);
// Now get all your IDs
List<string> IDs = (from xml in deserializedXML.Variable select xml.Id).ToList();
} // Put a break-point here, then mouse-over IDs and you will see all your IDs... deserializedXML contains the entire object if you want anythin else ....
}
catch (Exception)
{
throw;
}
我从应用程序* .exe文件夹中的文件（xml.xml）中读取XML，您需要根据具体要求调整此解决方案....
这是你需要的吗？....
try
{
XmlSerializer DeserializerPlaces = new XmlSerializer(typeof(DeviceState));
string html = string.Empty;
string url = @"https://<Your URL>";
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
//request.AutomaticDecompression = DecompressionMethods.GZip;
using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
using (Stream stream = response.GetResponseStream())
using (StreamReader reader = new StreamReader(stream))
{
DeviceState dezerializedXML = (DeviceState)DeserializerPlaces.Deserialize(reader);
//html = reader.ReadToEnd();
}
//Console.WriteLine(html);
}
catch (System.Exception)
{
throw;
}
您可以每隔5秒调用一次并更新您的UI（来自dezerializedXML属性）