【发布时间】：2016-10-06 20:00:33
【问题描述】：
我一直在挖掘我能找到的与 Xpath 和 XML 解析相关的每个示例。我找不到一个足够接近我必须处理的 XML 的示例，这对我来说是有意义的。我在特别是围绕 Xpath 以及更一般意义上的 XML 解析方面遇到了极其困难的时间。我正在处理的文件的复杂性并没有让它更容易理解。
我有一个来自我无法控制的远程源的 XML 文件。 文件是：
<AssetWarrantyDTO xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.datacontract.org/2004/07/Dell.Support.AssetsExternalAPI.Web.Models.V1.Response">
<AdditionalInformation i:nil="true"/>
<AssetWarrantyResponse>
<AssetWarrantyResponse>
<AssetEntitlementData>
<AssetEntitlement>
<EndDate>2010-12-20T23:59:59</EndDate>
<EntitlementType>EXTENDED</EntitlementType>
<ItemNumber>983-4252</ItemNumber>
<ServiceLevelCode>ND</ServiceLevelCode>
<ServiceLevelDescription>Next Business Day Onsite</ServiceLevelDescription>
<ServiceLevelGroup>5</ServiceLevelGroup>
<ServiceProvider>UNY</ServiceProvider>
<StartDate>2008-12-21T00:00:00</StartDate>
</AssetEntitlement>
<AssetEntitlement>
<EndDate>2010-12-20T23:59:59</EndDate>
<EntitlementType>EXTENDED</EntitlementType>
<ItemNumber>987-1139</ItemNumber>
<ServiceLevelCode>TS</ServiceLevelCode>
<ServiceLevelDescription>ProSupport</ServiceLevelDescription>
<ServiceLevelGroup>8</ServiceLevelGroup>
<ServiceProvider>DELL</ServiceProvider>
<StartDate>2008-12-21T00:00:00</StartDate>
</AssetEntitlement>
<AssetEntitlement>
<EndDate>2008-12-20T23:59:59</EndDate>
<EntitlementType>INITIAL</EntitlementType>
<ItemNumber>984-0210</ItemNumber>
<ServiceLevelCode>ND</ServiceLevelCode>
<ServiceLevelDescription>Next Business Day Onsite</ServiceLevelDescription>
<ServiceLevelGroup>5</ServiceLevelGroup>
<ServiceProvider>UNY</ServiceProvider>
<StartDate>2007-12-20T00:00:00</StartDate>
</AssetEntitlement>
<AssetEntitlement>
<EndDate>2008-12-20T23:59:59</EndDate>
<EntitlementType>INITIAL</EntitlementType>
<ItemNumber>987-1308</ItemNumber>
<ServiceLevelCode>TS</ServiceLevelCode>
<ServiceLevelDescription>ProSupport</ServiceLevelDescription>
<ServiceLevelGroup>8</ServiceLevelGroup>
<ServiceProvider>DELL</ServiceProvider>
<StartDate>2007-12-20T00:00:00</StartDate>
</AssetEntitlement>
</AssetEntitlementData>
<AssetHeaderData>
<BUID>11</BUID>
<CountryLookupCode>US</CountryLookupCode>
<CustomerNumber>64724056</CustomerNumber>
<IsDuplicate>false</IsDuplicate>
<ItemClassCode>`U060</ItemClassCode>
<LocalChannel>17</LocalChannel>
<MachineDescription>Precision T3400</MachineDescription>
<OrderNumber>979857987</OrderNumber>
<ParentServiceTag i:nil="true"/>
<ServiceTag>7P3VBU1</ServiceTag>
<ShipDate>2007-12-20T00:00:00</ShipDate>
</AssetHeaderData>
<ProductHeaderData>
<LOB>Dell Precision WorkStation</LOB>
<LOBFriendlyName>Precision WorkStation</LOBFriendlyName>
<ProductFamily>Desktops & All-in-Ones</ProductFamily>
<ProductId>precision-t3400</ProductId>
<SystemDescription>Precision T3400</SystemDescription>
</ProductHeaderData>
</AssetWarrantyResponse>
</AssetWarrantyResponse>
<ExcessTags>
<BadAssets xmlns:d3p1="http://schemas.microsoft.com/2003/10/Serialization/Arrays"/>
</ExcessTags>
<InvalidBILAssets>
<BadAssets xmlns:d3p1="http://schemas.microsoft.com/2003/10/Serialization/Arrays"/>
</InvalidBILAssets>
<InvalidFormatAssets>
<BadAssets xmlns:d3p1="http://schemas.microsoft.com/2003/10/Serialization/Arrays"/>
</InvalidFormatAssets>
</AssetWarrantyDTO>
这是最终代码，不包括 API URL 的 URI 变量设置。
protected void Unnamed1_Click(object sender, EventArgs e)
{
string Serial = TextBox1.Text.ToUpper();
URI = String.Format(URI, Serial);
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(URI);
request.UserAgent = "Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3";
request.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
CookieContainer aCookie = new CookieContainer();
request.CookieContainer = aCookie;
WebResponse pageResponse = request.GetResponse();
Stream responseStream = pageResponse.GetResponseStream();
string xml = string.Empty;
using (StreamReader streamRead = new StreamReader(responseStream))
{
xml = streamRead.ReadToEnd();
}
XmlDocument doc1 = new XmlDocument();
doc1.LoadXml(xml);
string _byteOrderMarkUtf8 = Encoding.UTF8.GetString(Encoding.UTF8.GetPreamble());
if (xml.StartsWith(_byteOrderMarkUtf8))
{
var lastIndexOfUtf8 = _byteOrderMarkUtf8.Length - 1;
xml = xml.Remove(0, lastIndexOfUtf8);
//Label2.Text = "BOM found.";
}
XmlNamespaceManager nsmgr = new XmlNamespaceManager(doc1.NameTable);
nsmgr.AddNamespace("j", "http://schemas.datacontract.org/2004/07/Dell.Support.AssetsExternalAPI.Web.Models.V1.Response");
XmlNodeList nodes = doc1.SelectNodes(".//j:AssetWarrantyResponse/j:AssetWarrantyResponse/j:AssetEntitlementData", nsmgr);
//Make a list to hold the start dates
System.Collections.ArrayList startDates = new System.Collections.ArrayList();
//Make a list to hold the end dates
System.Collections.ArrayList endDates = new System.Collections.ArrayList();
//Create a regex for finding just the date and discarding the time value which can alter tha date if the time is 24:00 (euro standard)
Regex r = new Regex(@"\d{4}-\d{1,2}-\d{1,2}", RegexOptions.IgnoreCase);
//Set the culture to format the date as US region
CultureInfo dtFormat = new CultureInfo("en-US", false);
foreach (XmlNode node in nodes)
{
foreach (XmlNode childNode in node.ChildNodes)
{
string startDate = childNode["StartDate"].InnerText;
if (startDate != null)
{
MatchCollection mcl1 = r.Matches(startDate);
startDates.Add(DateTime.Parse(mcl1[0].ToString(), dtFormat));
}
string endDate = childNode["EndDate"].InnerText;
if (endDate != null)
{
MatchCollection mcl2 = r.Matches(endDate);
endDates.Add(DateTime.Parse(mcl2[0].ToString(), dtFormat));
}
}
startDates.Sort();
endDates.Sort();
DateTime wStartDate = new DateTime();
DateTime wEndDate = new DateTime();
//if (dates.Count > 1) wStartDate = (DateTime)dates[dates.Count - 1];
if (startDates.Count >= 1) wStartDate = (DateTime)startDates[0];
Label1.Text = wStartDate.ToString("MM/dd/yyyy");
if (endDates.Count >= 1) wEndDate = (DateTime)endDates[endDates.Count - 1];
Label2.Text = wEndDate.ToString("MM/dd/yyyy");
//Label2.Text = tempc;
//Label3.Text = feels;
}
nodes = doc1.SelectNodes(".//j:AssetWarrantyResponse/j:AssetWarrantyResponse/j:AssetHeaderData", nsmgr);
foreach (XmlNode node in nodes)
{
try
{
string custNumber = node["CustomerNumber"].InnerText;
string model = node["MachineDescription"].InnerText;
string orderNumber = node["OrderNumber"].InnerText;
string serialNumber = node["ServiceTag"].InnerText;
Label3.Text = custNumber;
Label4.Text = model;
Label5.Text = orderNumber;
Label6.Text = serialNumber;
}
catch (Exception ex)
{
dbgLabel.Text = ex.Message;
}
}
}
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