从 C# 中的 SOAP 消息中获取字符串

Question

如何解析 SOAP 消息中的特定部分并获取它们的值？

例如，如果soap响应消息是这样的：

      <?xml version="1.0" encoding="utf-8"?>
 <soap12:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
 xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
 xmlns:soap12="http://www.w3.org/2003/05/soap-envelope">
   <soap12:Body>
     <GetCountryListResponse xmlns="http://example.org/">
       <GetCountryListResult>
         <string>string</string>
         <string>string</string>
       </GetCountryListResult>
     </GetCountryListResponse>
   </soap12:Body>
 </soap12:Envelope>

我想获取 GetCountryListResult 值并将其保存到字符串变量中。

我在 Java 中找到了一个很好的答案：

Get Strings from SOAP Message in Java

Answer 1

此示例将从文件中读取您的 xml 并构建找到的字符串列表，但您可以了解并了解如何解析它。

using (FileStream fs = new FileStream(@"c:\temp\soap.xml", FileMode.Open))
{
    var sr = new StreamReader(fs);
    var str = sr.ReadToEnd();
    XmlDocument document = new XmlDocument();
    document.LoadXml(str);

    XmlNamespaceManager manager = new XmlNamespaceManager(document.NameTable);
    manager.AddNamespace("soap12", "http://www.w3.org/2003/05/soap-envelope");
    manager.AddNamespace("", "http://example.org/");
    XmlNodeList xnList = document.SelectNodes("//soap12:Envelope/soap12:Body/GetCountryListResponse/GetCountryListResult", manager);
    if (xnList.Count == 0) return;

    XmlNode countryListResult = xnList[0];
    List<string> result = new List<string>();
    foreach (XmlNode childNode in countryListResult.ChildNodes)
    {
        result.Add(childNode.FirstChild.Value);
    }
}

您还需要添加错误处理。

Answer 2

var service = new WebService(); var result = service.Invoke(soapAction, 方法, 参数);

XNamespace nsSoap = "http://www.w3.org/2003/05/soap-envelope";
XNamespace ns = "link-to-namespace";

// Look for the "Fault" element in the response. If present, there was an error.
var fault = result.Root.Element("{" + nsSoap + "}Body").Element("{" + ns_soap + "}Fault");
if (error != null)
{
    var codeWithNs = error.Element("{" + nsSoap + "}Code").Element("{" + ns_soap + "}Value").Value;
    var codeSplit = codeWithNs.Split(':');
    var code = codeSplit.Length == 2 ? codeSplit[1] : codeSplit[0];
    if (code == "InvalidUsernameOrPassword")
    {
        throw new InvalidUsernameOrPasswordException();
    }
    else
    {
        throw new Exception("Something went wrong.");
    }
}