XML反序列化为C#类遇字段为空及额外字段适配问题求助

问题背景 #

给定Salesforce Webhook的Sample XML，使用现有C#类反序列化时，<sf:Id>字段值为空，同时需要适配Form_ID__c、Ticket_Id__c、Status这几个自定义字段。

修正后的C#类定义 #

using System.Xml.Serialization;

[XmlRoot(ElementName = "Envelope", Namespace = "http://schemas.xmlsoap.org/soap/envelope/")]
public class WebhookModelRequestBody
{
    [XmlElement(ElementName = "Body", Namespace = "http://schemas.xmlsoap.org/soap/envelope/")]
    public Body Body { get; set; }
}

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

[XmlRoot(ElementName = "notifications", Namespace = "http://soap.sforce.com/2005/09/outbound")]
public class Notifications
{
    [XmlElement(ElementName = "OrganizationId")]
    public string OrganizationId { get; set; }

    [XmlElement(ElementName = "ActionId")]
    public string ActionId { get; set; }

    [XmlElement(ElementName = "SessionId")]
    public string SessionId { get; set; }

    [XmlElement(ElementName = "EnterpriseUrl")]
    public string EnterpriseUrl { get; set; }

    [XmlElement(ElementName = "PartnerUrl")]
    public string PartnerUrl { get; set; }

    [XmlElement(ElementName = "Notification")]
    public Notification Notification { get; set; }
}

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

    [XmlElement(ElementName = "sObject", Namespace = "urn:sobject.enterprise.soap.sforce.com")]
    public SObject SObject { get; set; }
}

[XmlRoot(ElementName = "sObject", Namespace = "urn:sobject.enterprise.soap.sforce.com")]
public class SObject
{
    [XmlElement(ElementName = "Id", Namespace = "urn:sobject.enterprise.soap.sforce.com")]
    public string Id { get; set; }

    [XmlElement(ElementName = "Form_ID__c", Namespace = "urn:sobject.enterprise.soap.sforce.com")]
    public string Form_ID__c { get; set; }

    [XmlElement(ElementName = "Ticket_Id__c", Namespace = "urn:sobject.enterprise.soap.sforce.com")]
    public string Ticket_Id__c { get; set; }

    [XmlElement(ElementName = "Status", Namespace = "urn:sobject.enterprise.soap.sforce.com")]
    public string Status { get; set; }

    [XmlAttribute(AttributeName = "type", Namespace = "http://www.w3.org/2001/XMLSchema-instance")]
    public string Type { get; set; }
}

关键修正说明 #

1. SessionId类型修正：原代码中SessionId类仅用于处理nil属性，但Sample XML里的<SessionId>是普通字符串值，因此直接将Notifications类中的SessionId属性改为string类型，删除多余的SessionId类定义。
2. SObject字段命名空间匹配：<sf:Id>等字段属于urn:sobject.enterprise.soap.sforce.com命名空间，需为每个字段显式指定Namespace属性，确保反序列化时能正确匹配XML元素。
3. 添加自定义字段：在SObject类中新增Form_ID__c、Ticket_Id__c、Status属性，并指定对应的命名空间。
4. 保留xsi:type属性：为SObject类添加Type属性映射XML中的xsi:type，完整保留元数据信息。
5. 移除冗余属性：删除Notifications类中多余的Xmlns属性，该命名空间已通过XmlRoot和XmlElement的Namespace属性声明。

反序列化示例代码 #

using System.IO;
using System.Xml.Serialization;

public static WebhookModelRequestBody DeserializeXml(string xmlContent)
{
    var serializer = new XmlSerializer(typeof(WebhookModelRequestBody));
    using (var reader = new StringReader(xmlContent))
    {
        return (WebhookModelRequestBody)serializer.Deserialize(reader);
    }
}

内容的提问来源于stack exchange，提问作者Prajwal Gunjal