.NET XML序列化错误（反映类型有错误）
是的，我知道非常通用的标题，但我现在要解释。
鉴于下面的类定义，有人可以解释为什么我在调用Serialize（）方法时会得到此exception。
{“有一个错误反映了’FNM.MISMO_3_0.FOREIGN_OBJECT’类型。”}
{“选择标识符’ItemsElementName’的类型与’Items’的类型不一致。请使用System.Collections.Generic.List`1 [[MISMO_3_0.ItemsChoiceType，MISMO_3_0，Version = 1.0.0.0，Culture = neutral，PublicKeyToken]的数组= NULL]]。“}
谢谢你，斯蒂芬
[System.CodeDom.Compiler.GeneratedCodeAttribute("System.Xml", "4.0.30319.225")] [System.SerializableAttribute()] [System.Diagnostics.DebuggerStepThroughAttribute()] [System.ComponentModel.DesignerCategoryAttribute("code")] [System.Xml.Serialization.XmlTypeAttribute(Namespace = "http://www.mismo.org/residential/2009/schemas")] [System.Xml.Serialization.XmlRootAttribute(Namespace = "http://www.mismo.org/residential/2009/schemas", IsNullable = true)] public partial class FOREIGN_OBJECT { private List itemsField; private List itemsElementNameField; private MISMOresourceLink typeField; private bool typeFieldSpecified; private string roleField; private string titleField; private string labelField; private string sequenceNumberField; private static System.Xml.Serialization.XmlSerializer serializer; public FOREIGN_OBJECT() { this.itemsElementNameField = new List(); this.itemsField = new List(); } [System.Xml.Serialization.XmlElementAttribute("CharacterEncodingSetType", typeof(CharacterEncodingSetEnum), Order = 0)] [System.Xml.Serialization.XmlElementAttribute("CharacterEncodingSetTypeOtherDescription", typeof(MISMOString), Order = 0)] [System.Xml.Serialization.XmlElementAttribute("EXTENSION", typeof(EXTENSION), Order = 0)] [System.Xml.Serialization.XmlElementAttribute("EmbeddedContentXML", typeof(MISMOXML), Order = 0)] [System.Xml.Serialization.XmlElementAttribute("MIMETypeIdentifier", typeof(MISMOIdentifier), Order = 0)] [System.Xml.Serialization.XmlElementAttribute("ObjectCreatedDatetime", typeof(MISMODatetime), Order = 0)] [System.Xml.Serialization.XmlElementAttribute("ObjectDescription", typeof(MISMOString), Order = 0)] [System.Xml.Serialization.XmlElementAttribute("ObjectEncodingType", typeof(ObjectEncodingEnum), Order = 0)] [System.Xml.Serialization.XmlElementAttribute("ObjectEncodingTypeOtherDescription", typeof(MISMOString), Order = 0)] [System.Xml.Serialization.XmlElementAttribute("ObjectName", typeof(MISMOString), Order = 0)] [System.Xml.Serialization.XmlElementAttribute("ObjectURI", typeof(string), DataType = "anyURI", Order = 0)] [System.Xml.Serialization.XmlElementAttribute("OriginalCreatorDigestValue", typeof(MISMOValue), Order = 0)] [System.Xml.Serialization.XmlElementAttribute("REFERENCE", typeof(REFERENCE), Order = 0)] [System.Xml.Serialization.XmlChoiceIdentifierAttribute("ItemsElementName")] public List Items { get { return this.itemsField; } set { this.itemsField = value; } } [System.Xml.Serialization.XmlElementAttribute("ItemsElementName", Order = 1)] [System.Xml.Serialization.XmlIgnoreAttribute()] public List ItemsElementName { get { return this.itemsElementNameField; } set { this.itemsElementNameField = value; } } [System.Xml.Serialization.XmlAttributeAttribute(Form = System.Xml.Schema.XmlSchemaForm.Qualified, Namespace = "http://www.w3.org/1999/xlink")] public MISMOresourceLink type { get { return this.typeField; } set { this.typeField = value; } } [System.Xml.Serialization.XmlIgnoreAttribute()] public bool typeSpecified { get { return this.typeFieldSpecified; } set { this.typeFieldSpecified = value; } } [System.Xml.Serialization.XmlAttributeAttribute(Form = System.Xml.Schema.XmlSchemaForm.Qualified, Namespace = "http://www.w3.org/1999/xlink")] public string role { get { return this.roleField; } set { this.roleField = value; } } [System.Xml.Serialization.XmlAttributeAttribute(Form = System.Xml.Schema.XmlSchemaForm.Qualified, Namespace = "http://www.w3.org/1999/xlink")] public string title { get { return this.titleField; } set { this.titleField = value; } } [System.Xml.Serialization.XmlAttributeAttribute(Form = System.Xml.Schema.XmlSchemaForm.Qualified, Namespace = "http://www.w3.org/1999/xlink", DataType = "NMTOKEN")] public string label { get { return this.labelField; } set { this.labelField = value; } } [System.Xml.Serialization.XmlAttributeAttribute(DataType = "integer")] public string SequenceNumber { get { return this.sequenceNumberField; } set { this.sequenceNumberField = value; } } private static System.Xml.Serialization.XmlSerializer Serializer { get { if ((serializer == null)) { serializer = new System.Xml.Serialization.XmlSerializer(typeof(FOREIGN_OBJECT)); } return serializer; } } #region Serialize/Deserialize /// /// Serializes current FOREIGN_OBJECT object into an XML document /// /// string XML value public virtual string Serialize(System.Text.Encoding encoding) { System.IO.StreamReader streamReader = null; System.IO.MemoryStream memoryStream = null; try { memoryStream = new System.IO.MemoryStream(); System.Xml.XmlWriterSettings xmlWriterSettings = new System.Xml.XmlWriterSettings(); xmlWriterSettings.Encoding = encoding; System.Xml.XmlWriter xmlWriter = XmlWriter.Create(memoryStream, xmlWriterSettings); Serializer.Serialize(xmlWriter, this); memoryStream.Seek(0, System.IO.SeekOrigin.Begin); streamReader = new System.IO.StreamReader(memoryStream); return streamReader.ReadToEnd(); } finally { if ((streamReader != null)) { streamReader.Dispose(); } if ((memoryStream != null)) { memoryStream.Dispose(); } } } public virtual string Serialize() { return Serialize(Encoding.UTF8); } /// /// Deserializes workflow markup into an FOREIGN_OBJECT object /// /// string workflow markup to deserialize /// Output FOREIGN_OBJECT object /// output Exception value if deserialize failed /// true if this XmlSerializer can deserialize the object; otherwise, false public static bool Deserialize(string xml, out FOREIGN_OBJECT obj, out System.Exception exception) { exception = null; obj = default(FOREIGN_OBJECT); try { obj = Deserialize(xml); return true; } catch (System.Exception ex) { exception = ex; return false; } } public static bool Deserialize(string xml, out FOREIGN_OBJECT obj) { System.Exception exception = null; return Deserialize(xml, out obj, out exception); } public static FOREIGN_OBJECT Deserialize(string xml) { System.IO.StringReader stringReader = null; try { stringReader = new System.IO.StringReader(xml); return ((FOREIGN_OBJECT)(Serializer.Deserialize(System.Xml.XmlReader.Create(stringReader)))); } finally { if ((stringReader != null)) { stringReader.Dispose(); } } } /// /// Serializes current FOREIGN_OBJECT object into file /// /// full path of outupt xml file /// output Exception value if failed /// true if can serialize and save into file; otherwise, false public virtual bool SaveToFile(string fileName, System.Text.Encoding encoding, out System.Exception exception) { exception = null; try { SaveToFile(fileName, encoding); return true; } catch (System.Exception e) { exception = e; return false; } } public virtual bool SaveToFile(string fileName, out System.Exception exception) { return SaveToFile(fileName, Encoding.UTF8, out exception); } public virtual void SaveToFile(string fileName) { SaveToFile(fileName, Encoding.UTF8); } public virtual void SaveToFile(string fileName, System.Text.Encoding encoding) { System.IO.StreamWriter streamWriter = null; try { string xmlString = Serialize(encoding); streamWriter = new System.IO.StreamWriter(fileName, false, Encoding.UTF8); streamWriter.WriteLine(xmlString); streamWriter.Close(); } finally { if ((streamWriter != null)) { streamWriter.Dispose(); } } } /// /// Deserializes xml markup from file into an FOREIGN_OBJECT object /// /// string xml file to load and deserialize /// Output FOREIGN_OBJECT object /// output Exception value if deserialize failed /// true if this XmlSerializer can deserialize the object; otherwise, false public static bool LoadFromFile(string fileName, System.Text.Encoding encoding, out FOREIGN_OBJECT obj, out System.Exception exception) { exception = null; obj = default(FOREIGN_OBJECT); try { obj = LoadFromFile(fileName, encoding); return true; } catch (System.Exception ex) { exception = ex; return false; } } public static bool LoadFromFile(string fileName, out FOREIGN_OBJECT obj, out System.Exception exception) { return LoadFromFile(fileName, Encoding.UTF8, out obj, out exception); } public static bool LoadFromFile(string fileName, out FOREIGN_OBJECT obj) { System.Exception exception = null; return LoadFromFile(fileName, out obj, out exception); } public static FOREIGN_OBJECT LoadFromFile(string fileName) { return LoadFromFile(fileName, Encoding.UTF8); } public static FOREIGN_OBJECT LoadFromFile(string fileName, System.Text.Encoding encoding) { System.IO.FileStream file = null; System.IO.StreamReader sr = null; try { file = new System.IO.FileStream(fileName, FileMode.Open, FileAccess.Read); sr = new System.IO.StreamReader(file, encoding); string xmlString = sr.ReadToEnd(); sr.Close(); file.Close(); return Deserialize(xmlString); } finally { if ((file != null)) { file.Dispose(); } if ((sr != null)) { sr.Dispose(); } } } #endregion #region Clone method /// /// Create a clone of this FOREIGN_OBJECT object /// public virtual FOREIGN_OBJECT Clone() { return ((FOREIGN_OBJECT)(this.MemberwiseClone())); } #endregion } 仅当ChoiceIdentifier是数组而不是通用列表时，才支持XmlChoiceIdentifierAttribute的多个元素。
[System.Xml.Serialization.XmlElementAttribute("ItemsElementName", Order = 1)] [System.Xml.Serialization.XmlIgnoreAttribute()] public ItemsChoiceType[] ItemsElementName { // ... }
该错误令人困惑，因为它假设Items是类似数组（A列表）并且您的选择标识符不是数组，您在选择标识符的类型之前错过了数组限定符。 但事实并非如此，所以这个建议完全是误导性的。
注意：理论上看代码（来自微软源服务器）项目不需要是一个数组……实际上，临时序列化类的生成完全爆炸，因为List.Length不是公共的（它是显式实现的）