WCF 从 XML 接收空模型

Question

我们有一个定义类的 WCF 服务（类是使用 http://xmltocsharp.azurewebsites.net/ 从 XML 自动生成的）：

namespace CRMtoQLM.DAL
{
    [Serializable]
    [DataContract(Namespace = "http://schemas.xmlsoap.org/soap/envelope/")]
    public class Envelope
    {
    [XmlElement(ElementName = "Body", Namespace = "http://schemas.xmlsoap.org/soap/envelope/")]
    [DataMember]
    public Body Body { get; set; }
    [XmlAttribute(AttributeName = "soapenv", Namespace = "http://www.w3.org/2000/xmlns/")]
    [DataMember]
    public string Soapenv { get; set; }
    [XmlAttribute(AttributeName = "xsd", Namespace = "http://www.w3.org/2000/xmlns/")]
    [DataMember]
    public string Xsd { get; set; }
    [XmlAttribute(AttributeName = "xsi", Namespace = "http://www.w3.org/2000/xmlns/")]
    [DataMember]
    public string Xsi { get; set; }
}

//[Serializable]
[XmlRoot(ElementName = "Body", Namespace = "http://schemas.xmlsoap.org/soap/envelope/")]
[DataContract(Namespace = "http://schemas.xmlsoap.org/soap/envelope/")]
public class Body
{
    [XmlElement(ElementName = "notifications", Namespace = "http://soap.sforce.com/2005/09/outbound")]
    [DataMember]
    public Notifications Notifications { get; set; }
}

//[Serializable]
[XmlRoot(ElementName = "notifications", Namespace = "http://soap.sforce.com/2005/09/outbound")]
[DataContract(Namespace = "http://soap.sforce.com/2005/09/outbound")]
public class Notifications
{
    [XmlElement(ElementName = "OrganizationId", Namespace = "http://soap.sforce.com/2005/09/outbound")]
    [DataMember]
    public string OrganizationId { get; set; }
    [XmlElement(ElementName = "ActionId", Namespace = "http://soap.sforce.com/2005/09/outbound")]
    [DataMember]
    public string ActionId { get; set; }
    [XmlElement(ElementName = "SessionId", Namespace = "http://soap.sforce.com/2005/09/outbound")]
    [DataMember]
    public string SessionId { get; set; }
    [XmlElement(ElementName = "EnterpriseUrl", Namespace = "http://soap.sforce.com/2005/09/outbound")]
    [DataMember]
    public string EnterpriseUrl { get; set; }
    [XmlElement(ElementName = "PartnerUrl", Namespace = "http://soap.sforce.com/2005/09/outbound")]
    [DataMember]
    public string PartnerUrl { get; set; }
    [XmlElement(ElementName = "Notification", Namespace = "http://soap.sforce.com/2005/09/outbound")]
    [DataMember]
    public Notification Notification { get; set; }
    [XmlAttribute(AttributeName = "xmlns")]
    [DataMember]
    public string Xmlns { get; set; }
}

//[Serializable]
[XmlRoot(ElementName = "Notification", Namespace = "http://soap.sforce.com/2005/09/outbound")]
[DataContract(Namespace = "http://soap.sforce.com/2005/09/outbound")]
public class Notification
{
    [XmlElement(ElementName = "Id", Namespace = "http://soap.sforce.com/2005/09/outbound")]
    [DataMember]
    public string Id { get; set; }
    [XmlElement(ElementName = "sObject", Namespace = "http://soap.sforce.com/2005/09/outbound")]
    [DataMember]
    public SObject SObject { get; set; }
}

//[Serializable]
[XmlRoot(ElementName = "sObject", Namespace = "http://soap.sforce.com/2005/09/outbound")]
[DataContract(Namespace = "http://soap.sforce.com/2005/09/outbound")]
public class SObject
{
    [XmlElement(ElementName = "Id", Namespace = "urn:sobject.enterprise.soap.sforce.com")]
    [DataMember]
    public string Id { get; set; }
    [XmlElement(ElementName = "Asset_Account_City__c", Namespace = "urn:sobject.enterprise.soap.sforce.com")]
    [DataMember]
    public string Asset_Account_City__c { get; set; }
    [XmlElement(ElementName = "Asset_Account_Country__c", Namespace = "urn:sobject.enterprise.soap.sforce.com")]
    [DataMember]
    public string Asset_Account_Country__c { get; set; }
    [XmlElement(ElementName = "Asset_Account_Name__c", Namespace = "urn:sobject.enterprise.soap.sforce.com")]
    [DataMember]
    public string Asset_Account_Name__c { get; set; }
    [XmlElement(ElementName = "Asset_Customer_ID__c", Namespace = "urn:sobject.enterprise.soap.sforce.com")]
    [DataMember]
    public string Asset_Customer_ID__c { get; set; }
    [XmlElement(ElementName = "Expiration_Date__c", Namespace = "urn:sobject.enterprise.soap.sforce.com")]
    [DataMember]
    public string Expiration_Date__c { get; set; }
    [XmlElement(ElementName = "License__c", Namespace = "urn:sobject.enterprise.soap.sforce.com")]
    [DataMember]
    public string License__c { get; set; }
    [XmlElement(ElementName = "Reader_Code__c", Namespace = "urn:sobject.enterprise.soap.sforce.com")]
    [DataMember]
    public string Reader_Code__c { get; set; }
    [XmlElement(ElementName = "Reader_Quantity__c", Namespace = "urn:sobject.enterprise.soap.sforce.com")]
    [DataMember]
    public string Reader_Quantity__c { get; set; }
    [XmlAttribute(AttributeName = "type", Namespace = "http://www.w3.org/2001/XMLSchema-instance")]
    [DataMember]
    public string Type { get; set; }
    [XmlAttribute(AttributeName = "sf", Namespace = "http://www.w3.org/2000/xmlns/")]
    [DataMember]
    public string Sf { get; set; }
}
}

IService.cs 定义如下：

    [OperationContract]
    [WebInvoke(Method = "POST",
    UriTemplate = "Test",
    RequestFormat = WebMessageFormat.Xml)]
    //[XmlSerializerFormat]
    string Test(Envelope parameter);

和实施：

    public string Test(Envelope parameter)
    {
        return "";
    }

但 Test 函数中的“参数”包含 NULL 对象。我知道 XML 反序列化存在问题，但不知道具体在哪里。

编辑：这是我通过 Postman 发送的请求

<?xml version="1.0" encoding="UTF-8"?>
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" 
xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<soapenv:Body>
<notifications xmlns="http://soap.sforce.com/2005/09/outbound">
<OrganizationId>123456</OrganizationId>
<ActionId>123456</ActionId>
<SessionId>123456</SessionId>
<EnterpriseUrl>https://eu8.salesforce.com/</EnterpriseUrl>
<PartnerUrl>https://eu8.salesforce.com/</PartnerUrl>
<Notification>
<Id>123456</Id>
<sObject xsi:type="sf:Asset" xmlns:sf="urn:sobject.enterprise.soap.sforce.com">
 <sf:Id>123456</sf:Id>
 <sf:Asset_Account_City__c>123456</sf:Asset_Account_City__c>
 <sf:Asset_Account_Country__c>123456</sf:Asset_Account_Country__c>
 <sf:Asset_Account_Name__c>123456</sf:Asset_Account_Name__c>
 <sf:Asset_Customer_ID__c>123456</sf:Asset_Customer_ID__c>
 <sf:Expiration_Date__c>123456</sf:Expiration_Date__c>
 <sf:License__c>123456</sf:License__c>
 <sf:Reader_Code__c>123456</sf:Reader_Code__c>
 <sf:Reader_Quantity__c>123456</sf:Reader_Quantity__c>
</sObject>
</Notification>
</notifications>
</soapenv:Body>
</soapenv:Envelope>

Answer 1

基于 SOAP 的绑定为您解包 SOAP 信封，因此您不需要定义 SOAP 信封类型。您说您正在使用的 WebHttpBinding 对 SOAP 一无所知，它期望合同类型（您的服务方法 IService.Test 的参数）将匹配整个 HTTP 正文，所以我看到了什么的逻辑你正在做，但是我认为没有必要像这样反对框架。

要解决这种情况，请做几件事：

• 修改您的 IService.Test 实现以采用 Notifications 类型的参数
  • string Test(Notifications notifications)
• 修改服务配置以指定基于 HTTP 的 SOAP 绑定，可能是 BasicHttpBinding
  • <endpoint address="/relativeaddress/" binding="basicHttpBinding" ... />
• 我认为 SOAP 绑定可能会忽略 WebInvokeAttribute，但为了安全起见，请将其删除。这对于 SOAP 绑定来说是多余的，因为 SOAP 始终是 POST。

我认为您不需要删除 Envelope 和 Body 类型，但如果它们没有被引用，它们将不会做任何事情，这正是您想要的。 WCF 绑定本身就理解 SOAP 信封，不需要指定它，它是 SOAP Body 元素的内容，需要为其提供类型。

您的 XML 示例在 Notifications 下包含一个 Notification 实例，但名称暗示此子元素可能会重复 - 如果是，我认为生成的类不适用于您，因为 @987654331 @class 有一个单一的 Notification 属性-您链接到的生成器无法知道这一点，因此我不会以任何方式对其进行故障排除。我添加了Notification 元素的副本作为兄弟元素并再次运行它 - 这次它生成了一个列表成员：

[XmlElement(ElementName="Notification", Namespace="http://soap.sforce.com/2005/09/outbound")]
public List<Notification> Notification { get; set; }

您可以使用 Visual Studio 提供的 xsd.exe 工具（我认为）生成类 - 请参阅 the documentation。如果该网络工具在幕后推动这一点，我不会感到惊讶，但我相信 xsd.exe 会生成最符合 WCF 期望的类。