Linq to xml .net3.5 查询失败
0
悬赏园豆：20
[已解决问题]
解决于 2010-09-14 17:46
xml：
<?xml version="1.0" encoding="utf-8" ?><EntityDescriptor xmlns="urn:oasis:names:tc:SAML:2.0:metadata"
xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion"
xmlns:ds="http://www.w3.org/2000/09/xmldsig#"
entityID="http://10.162.1.220:8082/bspcore">
<IDPSSODescriptor WantAuthnRequestsSigned="true"
protocolSupportEnumeration="urn:oasis:names:tc:SAML:2.0:protocol"> <SingleSignOnService isDefault="true" index="0"
Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST"
Location="http://10.162.1.220:8082/bspcore/SAML2/POST/SSO" /> <SingleSignOnServiceBinding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect"Location="http://10.162.1.220:8082/bspcore/SAML2/REDIRECT/SSO" /> <ArtifactResolutionServiceBinding="urn:oasis:names:tc:SAML:2.0:bindings:SOAP"
Location="http://10.162.1.220:8082/bspcore/SAML2/Artifact" /> <SingleLogoutServiceBinding="urn:oasis:names:tc:SAML:2.0:bindings:SOAP"
Location="http://10.162.1.220:8082/bspcore/SAML2/SLO/SOAP" /> <SingleLogoutServiceBinding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect"Location="http://10.162.1.220:8082/bspcore/SAML2/SLO/REDIRECT"
ResponseLocation="http://10.162.1.220:8082/bspcore/SAML2/SLO/Response" /> <NameIDFormat> urn:oasis:names:tc:SAML:1.1:nameid-format:X509SubjectName </NameIDFormat> <NameIDFormat> urn:oasis:names:tc:SAML:2.0:nameid-format:persistent </NameIDFormat> <NameIDFormat> urn:oasis:names:tc:SAML:2.0:nameid-format:transient </NameIDFormat> </IDPSSODescriptor></EntityDescriptor>
代码：
XElement idpdoc = XElement.Load(new StreamReader("E:\\IDP.xml"));
var test = idpdoc.Descendants("NameIDFormat");
var NameIdFormats = (from ni in idpdoc.Descendants() where ni.Name=="NameIDFormat" select ni.Value).ToList<String>();
结果：
test.Count()=0;
NameIdFormats .Count()=0;
最佳答案
0
你的XML好像格式不太正确，建议你格式化下，我格式化后的XML：
<?xml version="1.0" encoding="utf-8" ?>
<EntityDescriptor xmlns="urn:oasis:names:tc:SAML:2.0:metadata"
xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion"
xmlns:ds="http://www.w3.org/2000/09/xmldsig#"
entityID="http://10.162.1.220:8082/bspcore">
<IDPSSODescriptor WantAuthnRequestsSigned="true"
protocolSupportEnumeration="urn:oasis:names:tc:SAML:2.0:protocol">
<SingleSignOnService isDefault="true" index="0"
Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST"
Location="http://10.162.1.220:8082/bspcore/SAML2/POST/SSO" />
<SingleSignOnServiceBinding xmlns="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect"
Location="http://10.162.1.220:8082/bspcore/SAML2/REDIRECT/SSO" />
<ArtifactResolutionServiceBinding Location="http://10.162.1.220:8082/bspcore/SAML2/Artifact" />
<SingleLogoutServiceBinding Location="http://10.162.1.220:8082/bspcore/SAML2/SLO/SOAP" />
<SingleLogoutServiceBinding xmlns="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect"
Location="http://10.162.1.220:8082/bspcore/SAML2/SLO/REDIRECT"
ResponseLocation="http://10.162.1.220:8082/bspcore/SAML2/SLO/Response" />
<NameIDFormat> urn:oasis:names:tc:SAML:1.1:nameid-format:X509SubjectName </NameIDFormat>
<NameIDFormat> urn:oasis:names:tc:SAML:2.0:nameid-format:persistent </NameIDFormat>
<NameIDFormat> urn:oasis:names:tc:SAML:2.0:nameid-format:transient </NameIDFormat>
</IDPSSODescriptor>
</EntityDescriptor>
至于为什么会出现这样的问题，你可以将下面代码执行并打印就可以发现了：
var NameIdFormats = from ni in idpdoc.Descendants()
select ni.Name;
打印出来的代码是，包含了具体的命名空间：
{urn:oasis:names:tc:SAML:2.0:metadata}IDPSSODescriptor
{urn:oasis:names:tc:SAML:2.0:metadata}SingleSignOnService
{urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect}SingleSignOnServiceBinding
{urn:oasis:names:tc:SAML:2.0:metadata}ArtifactResolutionServiceBinding
{urn:oasis:names:tc:SAML:2.0:metadata}SingleLogoutServiceBinding
{urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect}SingleLogoutServiceBinding
{urn:oasis:names:tc:SAML:2.0:metadata}NameIDFormat
{urn:oasis:names:tc:SAML:2.0:metadata}NameIDFormat
{urn:oasis:names:tc:SAML:2.0:metadata}NameIDFormat
所以你传NameIDFormat是匹配不到的。
你可以试下这个方法:
var NameIdFormats = from ni in idpdoc.Elements()
let ni2 = ni.Elements()
from ni3 in ni2
where ni3.Name == ni3.GetDefaultNamespace() + "NameIDFormat"
select ni3.Value;
收获园豆：20
//Querying XML containing namespaces with LINQ to XML
//Fully expanded query using an XNamespace and XName
XElement rss = XElement.Load("http://iqueryable.com/rss.aspx");
XNamespace dc = "http://purl.org/dc/elements/1.1/";
XNamespace slash = "http://purl.org/rss/1.0/modules/slash/";
XNamespace wfw = "http://wellformedweb.org/CommentAPI/"; IEnumerable<XElement> comments = rss.Descendants(slash + "comments"); foreach(XElement comment in comments)
{ Console.WriteLine((int)comment); }
//Query using only a local name
IEnumerable<XElement> titles = rss.Descendants("title");
foreach(XElement title in titles)
{ Console.WriteLine((string)title); }
<?xml-stylesheet href=http://iqueryable.com/friendly-rss.xsl type="text/xsl" media="screen"?> <rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/" xmlns:wfw="http://wellformedweb.org/CommentAPI/"> <channel> <title>Steve Eichert</title> <link>http://iqueryable.com/</link> <generator>ActiveType CMS v0.1</generator> <dc:language>en-US</dc:language> <description /> <item> <dc:creator>Steve Eichert</dc:creator> <title>Parsing WordML using LINQ to XML</title> <link>http://iqueryable.com/LINQ/ParsingWordMLusingLINQ to XML</link> <pubDate>Wed, 02 Aug 2006 15:52:44 GMT</pubDate> <guid>http://iqueryable.com/LINQ/ParsingWordMLusingLINQ to XML</guid> <comments> http://iqueryable.com/LINQ/ParsingWordMLusingLINQ to XML#comments </comments> <wfw:commentRss> http://iqueryable.com/LINQ/ParsingWordMLusingLINQ to XML/commentRss.aspx </wfw:commentRss> <slash:comments>1</slash:comments> <description>Foo…</description> </item> </channel>
或者直接说明下不指定命名空间的查找方式，带命名空间太麻烦
@镜涛:我用了个不是办法的办法，你看看
