我正在使用Linq-to-Xml创建两个IEnumerables，但我想将第二个列表的结果与第一个列表结合起来。当我使用.Concat()时，我收到以下错误：
'的IQueryable＆LT;＆GT;'不包含'Concat'的定义和最佳扩展方法重载'ParallelEnumerable.Concat＆lt;＆gt;（ParallelQuery＆lt;＆gt;，IEnumerable＆lt;＆gt;）'需要类型为'ParallelQuery＆lt;＆gt;'的接收器
我正在尝试.Concat()的两个列表在这里：
var findingDetails = from f in element.Elements(ns + "Group")
select new
{
testID = (string)f.Attribute("id").Value,
title = (string)f.Element(ns + "title"),
idrefFD = (string)f.Element(ns + "Rule").Attribute("id").Value,
severity = (string)f.Element(ns + "Rule").Attribute("severity").Value,
description = (string)f.Element(ns + "Rule").Element(ns + "description"),
fixText = (string)f.Element(ns + "Rule").Element(ns + "fixtext")
};
var getStatus = from gs in element.Descendants(ns + "rule-result")
select new
{
idrefStatus = (string)gs.Attribute("idref").Value,
result = (string)gs.Element(ns + "result"),
dateTime = (string)gs.Attribute("time")
};
此处的findingDetails用法生成错误：
var combined = findingDetails.Concat(getStatus);
我想要得到的是var，其中包含来自findingDetails + getStatus.result和getStatus.dateTime的所有内容。这就是为什么我只需迭代一个foreach()循环来访问所有值而不是使用嵌套的foreach()循环。
示例XML文档：
<?xml version="1.0" encoding="UTF-8"?>
<cdf:Benchmark style="SCAP_1.1" resolved="1" id="RHEL_6_STIG" xsi:schemaLocation="http://checklists.nist.gov/xccdf/1.1 http://nvd.nist.gov/schema/xccdf-1.1.4.xsd http://cpe.mitre.org/dictionary/2.0 http://scap.nist.gov/schema/cpe/2.2/cpe-dictionary_2.2.xsd" xmlns:cdf="http://checklists.nist.gov/xccdf/1.1" xmlns:cpe="http://cpe.mitre.org/dictionary/2.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dsig="http://www.w3.org/2000/09/xmldsig#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:xhtml="http://www.w3.org/1999/xhtml">
<cdf:status date="2016-04-22">accepted</cdf:status>
<cdf:title>Red Hat Enterprise Linux 6 Security Technical Implementation Guide</cdf:title>
<cdf:description>The Red Hat Enterprise Linux 6 Security Technical Implementation Guide (STIG) is published as a tool to improve the security of Department of Defense (DoD) information systems. Comments or proposed revisions to this document should be sent via e-mail to the following address: disa.stig_spt@mail.mil.</cdf:description>
<cdf:notice id="terms-of-use"></cdf:notice>
<cdf:reference href="http://iase.disa.mil">
<dc:publisher>DISA</dc:publisher>
<dc:source>STIG.DOD.MIL</dc:source>
</cdf:reference>
<cdf:plain-text id="release-info">Release: 11 Benchmark Date: 22 Apr 2016</cdf:plain-text>
<cdf:platform idref="cpe:/o:redhat:enterprise_linux:6"></cdf:platform>
<cdf:version>1</cdf:version>
<cdf:Profile id="MAC-1_Classified">
<cdf:title>I - Mission Critical Classified</cdf:title>
</cdf:Profile>
<cdf:Value id="var_umask_for_daemons">
<cdf:title>daemon umask</cdf:title>
<cdf:description>Enter umask for daemons</cdf:description>
<cdf:value>022</cdf:value>
<cdf:value selector="022">022</cdf:value>
<cdf:value selector="027">027</cdf:value>
</cdf:Value>
<cdf:Group id="V-7055">
<cdf:title>APPNET0031 No Strong Name Verification</cdf:title>
<cdf:description><GroupDescription></GroupDescription></cdf:description>
<cdf:Rule weight="10.0" id="SV-7438r2_rule" severity="medium">
<cdf:version>APPNET0031</cdf:version>
<cdf:title>Digital signatures assigned to strongly named assemblies must be verified.</cdf:title>
<cdf:description><VulnDiscussion>A strong name consists of the assembly's identity, simple text name, version number, and culture information (if provided)—plus a public key and a digital signature. Strong names serve to identify the author of the code. If digital signatures used to sign strong name assemblies are not verified, any self signed code can be impersonated. This can lead to a loss of system integrity. </VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility>System Administrator</Responsibility><IAControls>DCSL-1</IAControls></cdf:description>
<cdf:reference>
<dc:publisher>DISA</dc:publisher>
<dc:identifier>2030</dc:identifier>
<dc:type>DPMS Target</dc:type>
</cdf:reference>
<cdf:fixtext fixref="F-12596r7_fix">Use regedit to remove the values stored in Windows registry key hKLM\Software\Microsoft\StrongName\Verification. There should be no assemblies or hash values listed under this registry key. All assemblies must require strong name verification in a production environment. Strong name assemblies that do not require verification in a development or test environment must have documented approvals from the IAO.</cdf:fixtext>
<cdf:fix id="F-12596r7_fix"></cdf:fix>
<cdf:check system="http://oval.mitre.org/XMLSchema/oval-definitions-5">
<cdf:check-content-ref href="U_Microsoft_DotNet_Framework_4_V1R4_STIG_SCAP_1-1_Benchmark-oval.xml" name="oval:mil.disa.fso.dotnet:def:2"></cdf:check-content-ref>
</cdf:check>
</cdf:Rule>
</cdf:Group>
<cdf:TestResult start-time="2016-07-20T11:59:59" version="1" test-system="cpe:/a:spawar:scc:4.1" end-time="2016-07-20T12:00:50" id="U_Microsoft_DotNet_Framework_4_V1R4_STIG_SCAP_1-1_Benchmark-xccdf.xml---MAC-2_Classified-1">
<cdf:benchmark href="U_Microsoft_DotNet_Framework_4_V1R4_STIG_SCAP_1-1_Benchmark-xccdf.xml"></cdf:benchmark>
<cdf:organization>SPAWAR Systems Center Atlantic</cdf:organization>
<cdf:identity privileged="true" authenticated="true">CCSAdmin</cdf:identity>
<cdf:profile idref="MAC-2_Classified"></cdf:profile>
<cdf:target>hostname</cdf:target>
<cdf:target-address>192.168.1.000</cdf:target-address>
<cdf:target-facts>
<cdf:fact name="urn:scap:fact:asset:identifier:host_name" type="string">hostname</cdf:fact>
<cdf:fact name="urn:scap:fact:asset:identifier:domain" type="string">.net</cdf:fact>
<cdf:fact name="urn:scap:fact:asset:identifier:fqdn" type="string">hostname.net</cdf:fact>
<cdf:fact name="urn:scap:fact:asset:identifier:os_name" type="string">Windows 7 Enterprise</cdf:fact>
<cdf:fact name="urn:scap:fact:asset:identifier:os_service_pack" type="string">Service Pack 1</cdf:fact>
<cdf:fact name="urn:scap:fact:asset:identifier:ipv4" type="string">192.168.1.000</cdf:fact>
</cdf:target-facts>
<cdf:platform idref="cpe:/a:microsoft:.net_framework:4.0"></cdf:platform>
<cdf:rule-result version="APPNET0031" time="2016-07-20T11:59:59" idref="SV-7438r2_rule" weight="10.0" severity="medium">
<cdf:result>pass</cdf:result>
<cdf:check system="http://oval.mitre.org/XMLSchema/oval-definitions-5">
<cdf:check-content-ref href="U_Microsoft_DotNet_Framework_4_V1R4_STIG_SCAP_1-1_Benchmark-oval.xml" name="oval:mil.disa.fso.dotnet:def:2"></cdf:check-content-ref>
</cdf:check>
</cdf:rule-result>
<cdf:rule-result version="APPNET0046" time="2016-07-20T11:59:59" idref="SV-7444r3_rule" weight="10.0" severity="medium">
<cdf:result>fail</cdf:result>
<cdf:fix id="F-12602r12_fix"></cdf:fix>
<cdf:check system="http://oval.mitre.org/XMLSchema/oval-definitions-5">
<cdf:check-content-ref href="U_Microsoft_DotNet_Framework_4_V1R4_STIG_SCAP_1-1_Benchmark-oval.xml" name="oval:mil.disa.fso.dotnet:def:15"></cdf:check-content-ref>
</cdf:check>
</cdf:rule-result>
</cdf:TestResult>
</cdf:Benchmark>
我更改了查询，现在看起来像这样：
var findingDetails = from f in element.Elements(ns + "Group")
select new
{
idrefStatus = (string)"",
result = (string)"",
dateTime = (string)"",
testID = (string)f.Attribute("id").Value,
title = (string)f.Element(ns + "title"),
idref = (string)f.Element(ns + "Rule").Attribute("id").Value,
severity = (string)f.Element(ns + "Rule").Attribute("severity").Value,
description = (string)f.Element(ns + "Rule").Element(ns + "description"),
fixText = (string)f.Element(ns + "Rule").Element(ns + "fixtext")
};
var getStatus = from gs in element.Descendants(ns + "rule-result")
select new
{
idrefStatus = (string)gs.Attribute("idref").Value,
result = (string)gs.Element(ns + "result"),
dateTime = (string)gs.Attribute("time"),
testID = (string)"",
title = (string)"",
idref = (string)"",
severity = (string)"",
description = (string)"",
fixText = (string)""
};
var combined = findingDetails.Concat(getStatus);
但现在输出看起来像这样
foreach (var cf in combined)
{
Console.WriteLine(cf.idref + ", " + cf.result);
}
SV-7438r2_rule,
SV-7444r3_rule,
SV-40966r1_rule,
SV-41075r1_rule,
, pass
, fail
, pass
, pass
然而，我正试图得到这样的东西：
SV-7438r2_rule, pass
SV-7444r3_rule, fail
SV-40966r1_rule, pass
SV-41075r1_rule, pass
答案 0 :(得分：0)
如果声明具有完全相同的属性，则可以连接两个匿名类型。
你不能连接两种不同的类型，但你可以将它们转换为object然后连续：
List<int> ints = new List<int>() { 1, 2, 3 };
List<string> strings = new List<string> { "a", "b", "c" };
ints.Cast<object>().Concat( strings.Cast<object>() );
答案 1 :(得分：0)
从您的预期输出（“然而，我试图得到这样的东西：......”）和您添加的数据看起来像您正在寻找的是{{1而不是join列表（concat会给你n * m条记录）
这就是你正在寻找的东西：
concat如果您的 XNamespace ns = "http://checklists.nist.gov/xccdf/1.1";
var findingDetails = (from f in XDocument.Load("data.xml").Descendants(ns + "Group")
let rule = f.Element(ns + "Rule")
select new
{
testID = (string)f.Attribute("id").Value,
title = (string)f.Element(ns + "title"),
idref = (string)rule.Attribute("id").Value,
severity = (string)rule.Attribute("severity").Value,
description = (string)rule.Element(ns + "description"),
fixText = (string)rule.Element(ns + "fixtext")
}).ToList();
var getStatus = (from gs in XDocument.Load("data.xml").Descendants(ns + "rule-result")
select new
{
idrefStatus = (string)gs.Attribute("idref").Value,
result = (string)gs.Element(ns + "result"),
dateTime = (string)gs.Attribute("time"),
}).ToList();
var result = (from d in findingDetails
join f in getStatus on d.idref equals f.idrefStatus
select new { d, f }).ToList();
可能没有匹配Group，请改用<{1}}