堆栈内存溢出
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为什么在映射具有相同名称但不同名称空间的类的对象图时，XmlSerializer无法初始化？

[英]Why is XmlSerializer failing to initialize when mapping the object graph of classes with the same name, but different namespaces?

 原文  2014-04-23 15:29:26  4   1    c#/ xml/ xmlserializer

问题描述

我从没有名称空间的第三方接收XML。 XML模式以简化和混淆的形式显示如下： 

<Root>
    <Address>
        <PostalCode>57373</PostalCode>
    </Address>
    <ReportAReport>
        <Address>
            <Zip>18573</Zip>
        </Address>
    </ReportAReport>
</Root>

请注意，这里有两个不同的Address类。 这些实际上被定义为两个不同的complexType ，每个都在我从第三方收到的spearate XML模式中。 一个模式反映了Root模型，而另一个模式反映了ReportAReport的模型。每个Address类都有不同的属性。

我在命名空间中表示每个，将每个XML模式视为自己的命名空间。 事实上，模式定义了名称空间，但是我从第三方收到的XML响应因某种原因选择省略这些名称空间。

命名空间：MyCompany.MyProject 

namespace MyCompany.MyProject
{
    public class Root
    {
        public Address Address { get; set; }
        public ReportAReport ReportAReport { get; set; }
    }

    public class Address
    {
        public string PostalCode { get; set; }
    }
}

命名空间：MyCompany.MyProject.ReportA 

namespace MyCompany.MyProject.ReportA
{
    public class ReportAReport
    {
        public Address Address { get; set; }
    }

    public class Address
    {
        public string Zip { get; set; }
    }
}

我得到的例外情况如下：

结果消息：无法创建类MyCompany.MyProject.Test.AggregatorTests的实例。 错误：System.TypeInitializationException：'MyCompany.MyProject.Test.AggregatorTests'的类型初始值设定项引发异常。 ---> System.InvalidOperationException：有一个错误反映了'MyCompany.MyProject.Root'类型。 ---> System.InvalidOperationException：反映属性'ReportAReport'时出错。 ---> System.InvalidOperationException：反映出类型为“MyCompany.MyProject.ReportA.ReportAReport”的错误。 ---> System.InvalidOperationException：反映属性'Address'时出错。 ---> System.InvalidOperationException：反映出类型为“MyCompany.MyProject.ReportA.Address”的错误。 ---> System.InvalidOperationException：类型'MyCompany.MyProject.ReportA.Address'和'MyCompany.MyProject.Address'都使用来自命名空间''的XML类型名称'Address'。 使用XML属性为类型指定唯一的XML名称和/或命名空间。

此异常所指的行如下： 

XmlSerializer serializer = new XmlSerializer(typeof(Root));

关于正在发生的事情似乎相当清楚。 该XmlSerializer是没有理解到Address类的属性“地址”映射ReportAReport类。

我无法理解的是为什么它无法理解要映射属性的Address类。 在ReportAReport的类定义中，'Address'属性被声明为MyCompany.MyProject.ReportA.Address类型。

我甚至尝试使用XmlElementAttribute在ReportAReport上指定Type ： 

[XmlElement(Type = typeof(Address))]
public Address Address { get; set; }

虽然，这似乎相当多余......

题

编译器清楚地知道这里的Address是指MyCompany.MyProject.ReportA.Address 。 为什么XmlSerializer无法识别这个？

XmlSerializer不应该知道如果它遇到ReportAReport节点中的Address节点，它是MyCompany.MyProject.ReportA.Address类型而不是MyCompany.MyProject.Address吗？

我在这里错过了什么？

我添加了堆栈跟踪，因为它显示了XmlSerializer初始化进程打嗝的位置。 我实际上从我的真实世界示例中提取了这个堆栈跟踪，其中有几个节点比样本更深，因此堆栈跟踪中可能存在一些级别的递归，这些递归似乎与示例代码不符合我的情况提供。 

Result StackTrace:  
at System.Xml.Serialization.XmlReflectionImporter.GetTypeMapping(String typeName, String ns, TypeDesc typeDesc, NameTable typeLib, Type type)
   at System.Xml.Serialization.XmlReflectionImporter.ImportStructLikeMapping(StructModel model, String ns, Boolean openModel, XmlAttributes a, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.ImportTypeMapping(TypeModel model, String ns, ImportContext context, String dataType, XmlAttributes a, Boolean repeats, Boolean openModel, RecursionLimiter limiter)
 --- End of inner exception stack trace ---
    at System.Xml.Serialization.XmlReflectionImporter.ImportTypeMapping(TypeModel model, String ns, ImportContext context, String dataType, XmlAttributes a, Boolean repeats, Boolean openModel, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.ImportAccessorMapping(MemberMapping accessor, FieldModel model, XmlAttributes a, String ns, Type choiceIdentifierType, Boolean rpc, Boolean openModel, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.ImportFieldMapping(StructModel parent, FieldModel model, XmlAttributes a, String ns, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.InitializeStructMembers(StructMapping mapping, StructModel model, Boolean openModel, String typeName, RecursionLimiter limiter)
 --- End of inner exception stack trace ---
    at System.Xml.Serialization.XmlReflectionImporter.InitializeStructMembers(StructMapping mapping, StructModel model, Boolean openModel, String typeName, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.ImportStructLikeMapping(StructModel model, String ns, Boolean openModel, XmlAttributes a, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.ImportTypeMapping(TypeModel model, String ns, ImportContext context, String dataType, XmlAttributes a, Boolean repeats, Boolean openModel, RecursionLimiter limiter)
 --- End of inner exception stack trace ---
    at System.Xml.Serialization.XmlReflectionImporter.ImportTypeMapping(TypeModel model, String ns, ImportContext context, String dataType, XmlAttributes a, Boolean repeats, Boolean openModel, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.ImportAccessorMapping(MemberMapping accessor, FieldModel model, XmlAttributes a, String ns, Type choiceIdentifierType, Boolean rpc, Boolean openModel, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.ImportFieldMapping(StructModel parent, FieldModel model, XmlAttributes a, String ns, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.InitializeStructMembers(StructMapping mapping, StructModel model, Boolean openModel, String typeName, RecursionLimiter limiter)
 --- End of inner exception stack trace ---
    at System.Xml.Serialization.XmlReflectionImporter.InitializeStructMembers(StructMapping mapping, StructModel model, Boolean openModel, String typeName, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.ImportStructLikeMapping(StructModel model, String ns, Boolean openModel, XmlAttributes a, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.ImportTypeMapping(TypeModel model, String ns, ImportContext context, String dataType, XmlAttributes a, Boolean repeats, Boolean openModel, RecursionLimiter limiter)
 --- End of inner exception stack trace ---
    at System.Xml.Serialization.XmlReflectionImporter.ImportTypeMapping(TypeModel model, String ns, ImportContext context, String dataType, XmlAttributes a, Boolean repeats, Boolean openModel, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.CreateArrayElementsFromAttributes(ArrayMapping arrayMapping, XmlArrayItemAttributes attributes, Type arrayElementType, String arrayElementNs, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.ImportArrayLikeMapping(ArrayModel model, String ns, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.ImportAccessorMapping(MemberMapping accessor, FieldModel model, XmlAttributes a, String ns, Type choiceIdentifierType, Boolean rpc, Boolean openModel, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.ImportFieldMapping(StructModel parent, FieldModel model, XmlAttributes a, String ns, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.InitializeStructMembers(StructMapping mapping, StructModel model, Boolean openModel, String typeName, RecursionLimiter limiter)
 --- End of inner exception stack trace ---
    at System.Xml.Serialization.XmlReflectionImporter.InitializeStructMembers(StructMapping mapping, StructModel model, Boolean openModel, String typeName, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.ImportStructLikeMapping(StructModel model, String ns, Boolean openModel, XmlAttributes a, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.ImportTypeMapping(TypeModel model, String ns, ImportContext context, String dataType, XmlAttributes a, Boolean repeats, Boolean openModel, RecursionLimiter limiter)
 --- End of inner exception stack trace ---
    at System.Xml.Serialization.XmlReflectionImporter.ImportTypeMapping(TypeModel model, String ns, ImportContext context, String dataType, XmlAttributes a, Boolean repeats, Boolean openModel, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.ImportAccessorMapping(MemberMapping accessor, FieldModel model, XmlAttributes a, String ns, Type choiceIdentifierType, Boolean rpc, Boolean openModel, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.ImportFieldMapping(StructModel parent, FieldModel model, XmlAttributes a, String ns, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.InitializeStructMembers(StructMapping mapping, StructModel model, Boolean openModel, String typeName, RecursionLimiter limiter)
 --- End of inner exception stack trace ---
    at System.Xml.Serialization.XmlReflectionImporter.InitializeStructMembers(StructMapping mapping, StructModel model, Boolean openModel, String typeName, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.ImportStructLikeMapping(StructModel model, String ns, Boolean openModel, XmlAttributes a, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.ImportTypeMapping(TypeModel model, String ns, ImportContext context, String dataType, XmlAttributes a, Boolean repeats, Boolean openModel, RecursionLimiter limiter)
 --- End of inner exception stack trace ---
    at System.Xml.Serialization.XmlReflectionImporter.ImportTypeMapping(TypeModel model, String ns, ImportContext context, String dataType, XmlAttributes a, Boolean repeats, Boolean openModel, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.ImportAccessorMapping(MemberMapping accessor, FieldModel model, XmlAttributes a, String ns, Type choiceIdentifierType, Boolean rpc, Boolean openModel, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.ImportFieldMapping(StructModel parent, FieldModel model, XmlAttributes a, String ns, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.InitializeStructMembers(StructMapping mapping, StructModel model, Boolean openModel, String typeName, RecursionLimiter limiter)
 --- End of inner exception stack trace ---
    at System.Xml.Serialization.XmlReflectionImporter.InitializeStructMembers(StructMapping mapping, StructModel model, Boolean openModel, String typeName, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.ImportStructLikeMapping(StructModel model, String ns, Boolean openModel, XmlAttributes a, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.ImportTypeMapping(TypeModel model, String ns, ImportContext context, String dataType, XmlAttributes a, Boolean repeats, Boolean openModel, RecursionLimiter limiter)
 --- End of inner exception stack trace ---
    at System.Xml.Serialization.XmlReflectionImporter.ImportTypeMapping(TypeModel model, String ns, ImportContext context, String dataType, XmlAttributes a, Boolean repeats, Boolean openModel, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.ImportAccessorMapping(MemberMapping accessor, FieldModel model, XmlAttributes a, String ns, Type choiceIdentifierType, Boolean rpc, Boolean openModel, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.ImportFieldMapping(StructModel parent, FieldModel model, XmlAttributes a, String ns, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.InitializeStructMembers(StructMapping mapping, StructModel model, Boolean openModel, String typeName, RecursionLimiter limiter)
 --- End of inner exception stack trace ---
    at System.Xml.Serialization.XmlReflectionImporter.InitializeStructMembers(StructMapping mapping, StructModel model, Boolean openModel, String typeName, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.ImportStructLikeMapping(StructModel model, String ns, Boolean openModel, XmlAttributes a, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.ImportTypeMapping(TypeModel model, String ns, ImportContext context, String dataType, XmlAttributes a, Boolean repeats, Boolean openModel, RecursionLimiter limiter)
 --- End of inner exception stack trace ---
    at System.Xml.Serialization.XmlReflectionImporter.ImportTypeMapping(TypeModel model, String ns, ImportContext context, String dataType, XmlAttributes a, Boolean repeats, Boolean openModel, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.CreateArrayElementsFromAttributes(ArrayMapping arrayMapping, XmlArrayItemAttributes attributes, Type arrayElementType, String arrayElementNs, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.ImportArrayLikeMapping(ArrayModel model, String ns, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.ImportAccessorMapping(MemberMapping accessor, FieldModel model, XmlAttributes a, String ns, Type choiceIdentifierType, Boolean rpc, Boolean openModel, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.ImportFieldMapping(StructModel parent, FieldModel model, XmlAttributes a, String ns, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.InitializeStructMembers(StructMapping mapping, StructModel model, Boolean openModel, String typeName, RecursionLimiter limiter)
 --- End of inner exception stack trace ---
    at System.Xml.Serialization.XmlReflectionImporter.InitializeStructMembers(StructMapping mapping, StructModel model, Boolean openModel, String typeName, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.ImportStructLikeMapping(StructModel model, String ns, Boolean openModel, XmlAttributes a, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.ImportTypeMapping(TypeModel model, String ns, ImportContext context, String dataType, XmlAttributes a, Boolean repeats, Boolean openModel, RecursionLimiter limiter)
 --- End of inner exception stack trace ---
    at System.Xml.Serialization.XmlReflectionImporter.ImportTypeMapping(TypeModel model, String ns, ImportContext context, String dataType, XmlAttributes a, Boolean repeats, Boolean openModel, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.ImportElement(TypeModel model, XmlRootAttribute root, String defaultNamespace, RecursionLimiter limiter)
   at System.Xml.Serialization.XmlReflectionImporter.ImportTypeMapping(Type type, XmlRootAttribute root, String defaultNamespace)
   at System.Xml.Serialization.XmlSerializer..ctor(Type type, String defaultNamespace)
   at System.Xml.Serialization.XmlSerializer..ctor(Type type)
   at MyCompany.MyProject.Test.AggregatorTests..cctor() in c:\Users\crush\Documents\Visual Studio 2012\Projects\MyCompany.MyProject\Test\MyCompany.MyProject.Test\AggregatorTests.cs:line 16
 --- End of inner exception stack trace ---
    at MyCompany.MyProject.Test.AggregatorTests..ctor()

更新：在我意识到我对我收到的异常的初步评估完全不正确之后，我完全重写了这个问题。 我疏忽地认为反序列化是我收到的异常的原因，事实上，有人明确指出XmlSerializer初始化是个问题。 这个问题已被编辑，以说明这一事实，我正在说话时我正在擦掉蛋糕。 我向任何误导最初错误和不完整信息的人道歉。

1 个解决方案

解决方案1
 0  2014-06-07 03:47:10

尝试使用此模型进行反序列化。 您可以实例化任一类型的新地址，并从反序列化模型中设置值。 您可以使用AutoMapper来完成对象的复制 

    /// <remarks/>
    [System.SerializableAttribute()]
    [System.ComponentModel.DesignerCategoryAttribute("code")]
    [System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true)]
    [System.Xml.Serialization.XmlRootAttribute(Namespace = "", IsNullable = false)]
    public partial class Root
    {

        private RootAddress addressField;

        private RootReportAReport reportAReportField;

        /// <remarks/>
        public RootAddress Address
        {
            get
            {
                return this.addressField;
            }
            set
            {
                this.addressField = value;
            }
        }

        /// <remarks/>
        public RootReportAReport ReportAReport
        {
            get
            {
                return this.reportAReportField;
            }
            set
            {
                this.reportAReportField = value;
            }
        }
    }

    /// <remarks/>
    [System.SerializableAttribute()]
    [System.ComponentModel.DesignerCategoryAttribute("code")]
    [System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true)]
    public partial class RootAddress
    {

        private ushort postalCodeField;

        /// <remarks/>
        public ushort PostalCode
        {
            get
            {
                return this.postalCodeField;
            }
            set
            {
                this.postalCodeField = value;
            }
        }
    }

    /// <remarks/>
    [System.SerializableAttribute()]
    [System.ComponentModel.DesignerCategoryAttribute("code")]
    [System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true)]
    public partial class RootReportAReport
    {

        private RootReportAReportAddress addressField;

        /// <remarks/>
        public RootReportAReportAddress Address
        {
            get
            {
                return this.addressField;
            }
            set
            {
                this.addressField = value;
            }
        }
    }

    /// <remarks/>
    [System.SerializableAttribute()]
    [System.ComponentModel.DesignerCategoryAttribute("code")]
    [System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true)]
    public partial class RootReportAReportAddress
    {

        private ushort zipField;

        /// <remarks/>
        public ushort Zip
        {
            get
            {
                return this.zipField;
            }
            set
            {
                this.zipField = value;
            }
        }
    }

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