SOAP信封xmlelement directcast无法正常工作 [英] SOAP envelope xmlelement directcast not working

问题描述

我成功使用了Web服务SOAP信封XML响应。我在底部加了一个缩短的版本。



（＃1）当我使用时：

I'm successfully consuming a web-service SOAP envelope XML response. I've included a shortened version at the bottom.

(#1) when I use:

Dim totalcost1 As String = cfnroot.SelectNodes("GetRateQuoteResponse/GetRateQuoteResult/TotalCharges").Item(0).InnerText

我得到的值是2597.01这是正确的。

（＃2）当我使用：

I'm getting a value of 2597.01 which is correct.
(#2) When I use:

im totalcost As XmlElement = DirectCast(CFLxmldoc.SelectSingleNode("df:GetRateQuoteResponse/df:GetRateQuoteResult/df:TotalCharges", mgr), XmlElement)

我根本没有得到任何值。

我更喜欢使用＃2的语法并且总是使用它。我无法弄清楚为什么我没有从＃2获得任何价值。我发现测试空值或不存在的节点更容易。这是我第一次使用SOAP XML信封。通常使用REST / URL。

I'm not getting a value at all.
I prefer to use #2's syntax and always have used it. I can't figure out why i'm not getting any value from #2. I find it easier to test for empty values or nodes that aren't present. This is my first time using a SOAP XML envelope. Normally use REST/URL.

<?xml version="1.0"?>
<SOAP-ENV:Body xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
  <GetRateQuoteResponse	xmlns="">
    <GetRateQuoteResult>
      <Date>03/22/2019</Date>
      <Time>12:06:22</Time>
      <DeficitAmount>152.84</DeficitAmount>
      <TotalCharges>2597.01</TotalCharges>
      <NetCharges>918.91</NetCharges>
     </GetRateQuoteResult>
  </GetRateQuoteResponse>
</SOAP-ENV:Body>

我的尝试：

What I have tried:

Dim CFLresponse = CFLService.GetRateQuoteXml(CFLRaterequest)
Dim ResponseXML As String = CFLresponse.InnerXml
Dim CFLxmldoc As XmlDocument = New XmlDocument
CFLxmldoc.LoadXml(ResponseXML)

    Dim mgr As New XmlNamespaceManager(CFLxmldoc.NameTable)
mgr.AddNamespace("df", CFLxmldoc.DocumentElement.NamespaceURI)
Dim cfnroot As XmlElement = CFLxmldoc.DocumentElement

Dim totalcost As XmlElement = DirectCast(CFLxmldoc.SelectSingleNode("df:GetRateQuoteResponse/df:GetRateQuoteResult/df:TotalCharges", mgr), XmlElement)

Dim totalcost1 As String = cfnroot.SelectNodes("GetRateQuoteResponse/GetRateQuoteResult/TotalCharges").Item(0).InnerText

推荐答案

两个问题：



1）您的 SelectSingleNode 调用从文档开始，而你的 Sel ectNodes 从根节点开始呼叫。



2）您的 SelectSingleNode 呼叫是在http://schemas.xmlsoap.org/soap/envelope/命名空间中查找节点，而您的 SelectNodes call正在寻找没有命名空间的节点。



尝试：

Two problems:

1) Your SelectSingleNode call starts from the document, whereas your SelectNodes call starts from the root node.

2) Your SelectSingleNode call is looking for nodes in the "http://schemas.xmlsoap.org/soap/envelope/" namespace, whereas your SelectNodes call is looking for nodes with no namespace.

Try:

Dim totalcost As XmlElement = DirectCast(cfnroot.SelectSingleNode("GetRateQuoteResponse/GetRateQuoteResult/TotalCharges"), XmlElement)

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