使用 XMLDocument VB.NET 构建 SOAP 消息
我在 VB.NET 中使用 XMLDocument 构建格式正确的 SOAP 消息时遇到一些问题（尽管 C# 答案很好）。
我使用以下代码手动创建我的 SOAP 消息，发生的情况是 soap:Header 和 soap:Body 的命名空间前缀> 在输出 XML 中被剥离：
Dim soapEnvelope As XmlElement = _xmlRequest.CreateElement("soap", "Envelope", "http://schemas.xmlsoap.org/soap/envelope/")
soapEnvelope.SetAttribute("xmlns:xsd", "http://www.w3.org/2001/XMLSchema")
soapEnvelope.SetAttribute("xmlns:xsi", "http://www.w3.org/2001/XMLSchema-instance")
_xmlRequest.AppendChild(soapEnvelope)
Dim soapHeader As XmlElement = _xmlRequest.CreateElement("soap", "Header", String.Empty)
_xmlRequest.DocumentElement.AppendChild(soapHeader)
Dim soapBody As XmlElement = _xmlRequest.CreateElement("soap", "Body", String.Empty)
_xmlRequest.DocumentElement.AppendChild(soapBody)
这会产生以下输出：
<?xml version="1.0" encoding="UTF-8"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<Header>
...
</Header>
<Body>
....
</Body>
</soap:Envelope>
我需要的是：
<?xml version="1.0" encoding="UTF-8"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<soap:Header>
...
</soap:Header>
<soap:Body>
....
</soap:Body>
</soap:Envelope>
注意： 我很欣赏所有的输入，但无论任何关于 SOAP 的参考应该在接收端工作或解析或类似的东西，底线是我需要生成如上所述的 XML。提前致谢！
解决方案： 我解决这个问题的方法与Quartmeister答案非常相似。这个问题实际上与命名空间有关。不过，我没有每次都使用字符串值，而是使用 DocumentElement 的 NamespaceURI 来使用以下解决方案：
Dim soapHeader As XmlElement = _xmlRequest.CreateElement("soap", "Header", _xmlRequest.DocumentElement.NamespaceURI)
Dim soapBody As XmlElement = _xmlRequest.CreateElement("soap", "Body", _xmlRequest.DocumentElement.NamespaceURI)
I am having some problems building a properly formatted SOAP message using XMLDocument in VB.NET(C# answers are fine though).
I am using the following code to manually create my SOAP message, what is happening is that the namespace prefix of the soap:Header and soap:Body are being stripped in the output XML:
Dim soapEnvelope As XmlElement = _xmlRequest.CreateElement("soap", "Envelope", "http://schemas.xmlsoap.org/soap/envelope/")
soapEnvelope.SetAttribute("xmlns:xsd", "http://www.w3.org/2001/XMLSchema")
soapEnvelope.SetAttribute("xmlns:xsi", "http://www.w3.org/2001/XMLSchema-instance")
_xmlRequest.AppendChild(soapEnvelope)
Dim soapHeader As XmlElement = _xmlRequest.CreateElement("soap", "Header", String.Empty)
_xmlRequest.DocumentElement.AppendChild(soapHeader)
Dim soapBody As XmlElement = _xmlRequest.CreateElement("soap", "Body", String.Empty)
_xmlRequest.DocumentElement.AppendChild(soapBody)
This results in the following output:
<?xml version="1.0" encoding="UTF-8"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<Header>
...
</Header>
<Body>
....
</Body>
</soap:Envelope>
What I need is:
<?xml version="1.0" encoding="UTF-8"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<soap:Header>
...
</soap:Header>
<soap:Body>
....
</soap:Body>
</soap:Envelope>
NOTE: I appreciate all input, but regardless of any references to how SOAP should work or be parsed on the receiving side or anything like that, the bottom line is I need to generate the XML as described for. Thanks in advance!
SOLUTION:
Very similar to Quartmeister answer was the way I resolved this. The issue was in fact in relation to namespace. Rather than use the string value every time though, I used the following solution using the NamespaceURI of the DocumentElement:
Dim soapHeader As XmlElement = _xmlRequest.CreateElement("soap", "Header", _xmlRequest.DocumentElement.NamespaceURI)
Dim soapBody As XmlElement = _xmlRequest.CreateElement("soap", "Body", _xmlRequest.DocumentElement.NamespaceURI)
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您需要将 Header 和 Body 元素上的 XML 命名空间设置为soap 命名空间：
You need to set the XML namespace on the Header and Body elements to the soap namespace: