谁能解释为什么 ChildNodes.FindNode('') ( 1 ) 失败但 ChildNodes[''] ( 2 ) 成功?==>
代码:
const
cNodeSOAPEnvelope = 's:Envelope';
cNodeSOAPBody = 's:Body';
cNodeSOAPBodyFault = 's:Fault';
cNodeSOAPHeader = 's:Header';
cNodeFaultCode = 'faultcode';
cNodeFaultString = 'faultstring';
procedure TFrmXMLParsingTests.BtnTestClick(Sender: TObject);
var
SoapBodyNode,
SoapBodyFaultNode,
SoapHeaderNode,
FaultCodeNode,
FaultTextNode,
RootNode: IXmlNode;
begin
RootNode := XMLDoc.DocumentElement;
Assert(RootNode.NodeName = cNodeSOAPEnvelope,'Root node is not SOAP envelope');
SoapBodyNode := RootNode.ChildNodes[cNodeSOAPBody];
SoapBodyFaultNode := SoapBodyNode.ChildNodes[cNodeSOAPBodyFault];
if SoapBodyFaultNode <> nil then
begin
// FaultCodeNode := SoapBodyFaultNode.ChildNodes.FindNode(cNodeFaultCode); (*1*)
// FaultTextNode := SoapBodyFaultNode.ChildNodes.FindNode(cNodeFaultString); (*1*)
FaultCodeNode := SoapBodyFaultNode.ChildNodes[cNodeFaultCode]; (*2*)
FaultTextNode := SoapBodyFaultNode.ChildNodes[cNodeFaultString]; (*2*)
Exit; // Nothing more to do
end; { fault in body }
SoapHeaderNode := RootNode.ChildNodes.FindNode(cNodeSOAPHeader);
Assert(SoapHeaderNode <> nil,'SOAP Header not found');
end;
XML:
<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
<s:Body>
<s:Fault>
<faultcode xmlns:a="http://schemas.microsoft.com/exchange/services/2006/types">a:ErrorSchemaValidation</faultcode>
<faultstring xml:lang="nl-NL">The [snip] value.</faultstring>
<detail>
<e:ResponseCode xmlns:e="http://schemas.microsoft.com/exchange/services/2006/errors">ErrorSchemaValidation</e:ResponseCode>
<e:Message xmlns:e="http://schemas.microsoft.com/exchange/services/2006/errors">The request failed schema validation.</e:Message>
<t:MessageXml xmlns:t="http://schemas.microsoft.com/exchange/services/2006/types">
<t:LineNumber>10</t:LineNumber>
<t:LinePosition>30</t:LinePosition>
<t:Violation>The [snip] value.</t:Violation>
</t:MessageXml>
</detail>
</s:Fault>
</s:Body>
</s:Envelope>
谢谢
简