我想使用协议获取XML格式数据。OAI-PMH当我XML第一次使用反序列化时XmlSerializer，没有问题，但是当我尝试通过 a 获取 url 内容resumption token时，尝试反序列化时出现以下错误XML，即使xmlreader正确读取内容：
System.Xml.dll 中出现“System.InvalidOperationException”类型的未处理异常
附加信息：XML 文档中存在错误 (149, 26)。
InnerException：对于无符号字节，值太大或太小。
代码是这样的：
//getting content for the first time
string urlContent = BaseCommons.HttpHandler.getContent(first-time-url-link);
StreamReader OAIStream = new StreamReader(new MemoryStream(
Encoding.UTF8.GetBytes(urlContent)));
var reader = XmlReader.Create(
OAIStream.BaseStream, new XmlReaderSettings() {
ConformanceLevel = ConformanceLevel.Document });
OAI.OAIPMH OAIRes = new XmlSerializer(typeof(OAI.OAIPMH)).Deserialize(
reader) as OAI.OAIPMH;
//getting content for more than once
while (OAIRes.ListRecords.resumptionToken.Value != null &&
OAIRes.ListRecords.resumptionToken.Value.ToString() != "")
{
string nextUrl = BaseCommons.HttpHandler.getContent(second-url-with-resumption +
OAIRes.ListRecords.resumptionToken.Value.ToString());
StreamReader OAIStream1 = new StreamReader(
new MemoryStream(Encoding.UTF8.GetBytes(nextUrl)));
//xmlreader correctly reads content
XmlReader reader1 = XmlReader.Create(OAIStream1.BaseStream, new XmlReaderSettings() { ConformanceLevel = ConformanceLevel.Document });
// the error occured here
OAI.OAIPMH OAIRes1 = new XmlSerializer(typeof(OAI.OAIPMH)).Deserialize(reader1) as OAI.OAIPMH;
}
根据Microsoft Exception 的解释constructor，我在 my中添加了一个默认值OAIPMH partial class，但发生了同样的错误。作为对象类的OAI类xml如下：
public class OAI{
/// <remarks/>
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true, Namespace = "http://www.openarchives.org/OAI/2.0/")]
[System.Xml.Serialization.XmlRootAttribute("OAI-PMH", Namespace="http://www.openarchives.org/OAI/2.0/", IsNullable = false)]
public partial class OAIPMH
{
private System.DateTime responseDateField;
private OAIPMHRequest requestField;
private OAIPMHListRecords listRecordsField;
/// <remarks/>
public OAIPMH() { }
public System.DateTime responseDate
{
get
{
return this.responseDateField;
}
set
{
this.responseDateField = value;
}
}
/// <remarks/>
public OAIPMHRequest request
{
get
{
return this.requestField;
}
set
{
this.requestField = value;
}
}
/// <remarks/>
public OAIPMHListRecords ListRecords
{
get
{
return this.listRecordsField;
}
set
{
this.listRecordsField = value;
}
}
}
/// <remarks/>
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true, Namespace = "http://www.openarchives.org/OAI/2.0/")]
public partial class OAIPMHRequest
{
private string verbField;
private string metadataPrefixField;
private System.DateTime fromField;
private System.DateTime untilField;
private string valueField;
/// <remarks/>
[System.Xml.Serialization.XmlAttributeAttribute()]
public string verb
{
get
{
return this.verbField;
}
set
{
this.verbField = value;
}
}
/// <remarks/>
[System.Xml.Serialization.XmlAttributeAttribute()]
public string metadataPrefix
{
get
{
return this.metadataPrefixField;
}
set
{
this.metadataPrefixField = value;
}
}
/// <remarks/>
[System.Xml.Serialization.XmlAttributeAttribute(DataType = "date")]
public System.DateTime from
{
get
{
return this.fromField;
}
set
{
this.fromField = value;
}
}
/// <remarks/>
[System.Xml.Serialization.XmlAttributeAttribute(DataType = "date")]
public System.DateTime until
{
get
{
return this.untilField;
}
set
{
this.untilField = value;
}
}
/// <remarks/>
[System.Xml.Serialization.XmlTextAttribute()]
public string Value
{
get
{
return this.valueField;
}
set
{
this.valueField = value;
}
}
}
/// <remarks/>
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true, Namespace = "http://www.openarchives.org/OAI/2.0/")]
public partial class OAIPMHListRecords
{
private OAIPMHListRecordsRecord[] recordField;
private OAIPMHListRecordsResumptionToken resumptionTokenField;
/// <remarks/>
[System.Xml.Serialization.XmlElementAttribute("record")]
public OAIPMHListRecordsRecord[] record
{
get
{
return this.recordField;
}
set
{
this.recordField = value;
}
}
/// <remarks/>
public OAIPMHListRecordsResumptionToken resumptionToken
{
get
{
return this.resumptionTokenField;
}
set
{
this.resumptionTokenField = value;
}
}
}
/// <remarks/>
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true, Namespace = "http://www.openarchives.org/OAI/2.0/")]
public partial class OAIPMHListRecordsRecord
{
private OAIPMHListRecordsRecordHeader headerField;
private OAIPMHListRecordsRecordMetadata metadataField;
/// <remarks/>
public OAIPMHListRecordsRecordHeader header
{
get
{
return this.headerField;
}
set
{
this.headerField = value;
}
}
/// <remarks/>
public OAIPMHListRecordsRecordMetadata metadata
{
get
{
return this.metadataField;
}
set
{
this.metadataField = value;
}
}
}
/// <remarks/>
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true, Namespace = "http://www.openarchives.org/OAI/2.0/")]
public partial class OAIPMHListRecordsRecordHeader
{
private string identifierField;
private System.DateTime datestampField;
private string setSpecField;
private string statusField;
/// <remarks/>
public string identifier
{
get
{
return this.identifierField;
}
set
{
this.identifierField = value;
}
}
/// <remarks/>
public System.DateTime datestamp
{
get
{
return this.datestampField;
}
set
{
this.datestampField = value;
}
}
/// <remarks/>
public string setSpec
{
get
{
return this.setSpecField;
}
set
{
this.setSpecField = value;
}
}
/// <remarks/>
[System.Xml.Serialization.XmlAttributeAttribute()]
public string status
{
get
{
return this.statusField;
}
set
{
this.statusField = value;
}
}
}
/// <remarks/>
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true, Namespace = "http://www.openarchives.org/OAI/2.0/")]
public partial class OAIPMHListRecordsRecordMetadata
{
private mods modsField;
/// <remarks/>
[System.Xml.Serialization.XmlElementAttribute(Namespace = "http://www.loc.gov/mods/v3")]
public mods mods
{
get
{
return this.modsField;
}
set
{
this.modsField = value;
}
}
}
/// <remarks/>
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true, Namespace = "http://www.loc.gov/mods/v3")]
[System.Xml.Serialization.XmlRootAttribute(Namespace = "http://www.loc.gov/mods/v3", IsNullable = false)]
public partial class mods
{
private modsTitleInfo titleInfoField;
private modsName[] nameField;
private string typeOfResourceField;
private string genreField;
private modsOriginInfo originInfoField;
private modsLanguage languageField;
private modsAbstract[] abstractField;
private modsSubject subjectField;
private modsRelatedItem relatedItemField;
/// <remarks/>
public modsTitleInfo titleInfo
{
get
{
return this.titleInfoField;
}
set
{
this.titleInfoField = value;
}
}
/// <remarks/>
[System.Xml.Serialization.XmlElementAttribute("name")]
public modsName[] name
{
get
{
return this.nameField;
}
set
{
this.nameField = value;
}
}
/// <remarks/>
public string typeOfResource
{
get
{
return this.typeOfResourceField;
}
set
{
this.typeOfResourceField = value;
}
}
/// <remarks/>
public string genre
{
get
{
return this.genreField;
}
set
{
this.genreField = value;
}
}
/// <remarks/>
public modsOriginInfo originInfo
{
get
{
return this.originInfoField;
}
set
{
this.originInfoField = value;
}
}
/// <remarks/>
public modsLanguage language
{
get
{
return this.languageField;
}
set
{
this.languageField = value;
}
}
/// <remarks/>
[System.Xml.Serialization.XmlElementAttribute("abstract")]
public modsAbstract[] @abstract
{
get
{
return this.abstractField;
}
set
{
this.abstractField = value;
}
}
/// <remarks/>
public modsSubject subject
{
get
{
return this.subjectField;
}
set
{
this.subjectField = value;
}
}
/// <remarks/>
public modsRelatedItem relatedItem
{
get
{
return this.relatedItemField;
}
set
{
this.relatedItemField = value;
}
}
}
/// <remarks/>
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true, Namespace = "http://www.loc.gov/mods/v3")]
public partial class modsTitleInfo
{
private string titleField;
/// <remarks/>
public string title
{
get
{
return this.titleField;
}
set
{
this.titleField = value;
}
}
}
/// <remarks/>
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true, Namespace = "http://www.loc.gov/mods/v3")]
public partial class modsName
{
private string namePartField;
private string typeField;
/// <remarks/>
public string namePart
{
get
{
return this.namePartField;
}
set
{
this.namePartField = value;
}
}
/// <remarks/>
[System.Xml.Serialization.XmlAttributeAttribute()]
public string type
{
get
{
return this.typeField;
}
set
{
this.typeField = value;
}
}
}
/// <remarks/>
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true, Namespace = "http://www.loc.gov/mods/v3")]
public partial class modsOriginInfo
{
private string dateIssuedField;
/// <remarks/>
public string dateIssued
{
get
{
return this.dateIssuedField;
}
set
{
this.dateIssuedField = value;
}
}
}
/// <remarks/>
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true, Namespace = "http://www.loc.gov/mods/v3")]
public partial class modsLanguage
{
private string languageTermField;
/// <remarks/>
public string languageTerm
{
get
{
return this.languageTermField;
}
set
{
this.languageTermField = value;
}
}
}
/// <remarks/>
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true, Namespace = "http://www.loc.gov/mods/v3")]
public partial class modsAbstract
{
private string langField;
private string typeField;
private string valueField;
/// <remarks/>
[System.Xml.Serialization.XmlAttributeAttribute(Form = System.Xml.Schema.XmlSchemaForm.Qualified, Namespace = "http://www.w3.org/XML/1998/namespace")]
public string lang
{
get
{
return this.langField;
}
set
{
this.langField = value;
}
}
/// <remarks/>
[System.Xml.Serialization.XmlAttributeAttribute()]
public string type
{
get
{
return this.typeField;
}
set
{
this.typeField = value;
}
}
/// <remarks/>
[System.Xml.Serialization.XmlTextAttribute()]
public string Value
{
get
{
return this.valueField;
}
set
{
this.valueField = value;
}
}
}
/// <remarks/>
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true, Namespace = "http://www.loc.gov/mods/v3")]
public partial class modsSubject
{
private string topicField;
private string geographicField;
/// <remarks/>
public string topic
{
get
{
return this.topicField;
}
set
{
this.topicField = value;
}
}
/// <remarks/>
public string geographic
{
get
{
return this.geographicField;
}
set
{
this.geographicField = value;
}
}
}
/// <remarks/>
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true, Namespace = "http://www.loc.gov/mods/v3")]
public partial class modsRelatedItem
{
private modsRelatedItemTitleInfo titleInfoField;
private modsRelatedItemPart partField;
private string typeField;
/// <remarks/>
public modsRelatedItemTitleInfo titleInfo
{
get
{
return this.titleInfoField;
}
set
{
this.titleInfoField = value;
}
}
/// <remarks/>
public modsRelatedItemPart part
{
get
{
return this.partField;
}
set
{
this.partField = value;
}
}
/// <remarks/>
[System.Xml.Serialization.XmlAttributeAttribute()]
public string type
{
get
{
return this.typeField;
}
set
{
this.typeField = value;
}
}
}
/// <remarks/>
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true, Namespace = "http://www.loc.gov/mods/v3")]
public partial class modsRelatedItemTitleInfo
{
private string titleField;
/// <remarks/>
public string title
{
get
{
return this.titleField;
}
set
{
this.titleField = value;
}
}
}
/// <remarks/>
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true, Namespace = "http://www.loc.gov/mods/v3")]
public partial class modsRelatedItemPart
{
private modsRelatedItemPartDetail[] detailField;
private string dateField;
/// <remarks/>
[System.Xml.Serialization.XmlElementAttribute("detail")]
public modsRelatedItemPartDetail[] detail
{
get
{
return this.detailField;
}
set
{
this.detailField = value;
}
}
/// <remarks/>
public string date
{
get
{
return this.dateField;
}
set
{
this.dateField = value;
}
}
}
/// <remarks/>
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true, Namespace = "http://www.loc.gov/mods/v3")]
public partial class modsRelatedItemPartDetail
{
private byte numberField;
private string captionField;
private string typeField;
/// <remarks/>
public byte number
{
get
{
return this.numberField;
}
set
{
this.numberField = value;
}
}
/// <remarks/>
public string caption
{
get
{
return this.captionField;
}
set
{
this.captionField = value;
}
}
/// <remarks/>
[System.Xml.Serialization.XmlAttributeAttribute()]
public string type
{
get
{
return this.typeField;
}
set
{
this.typeField = value;
}
}
}
/// <remarks/>
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true, Namespace = "http://www.openarchives.org/OAI/2.0/")]
public partial class OAIPMHListRecordsResumptionToken
{
private System.DateTime expirationDateField;
private ushort completeListSizeField;
private byte cursorField;
private string valueField;
/// <remarks/>
[System.Xml.Serialization.XmlAttributeAttribute()]
public System.DateTime expirationDate
{
get
{
return this.expirationDateField;
}
set
{
this.expirationDateField = value;
}
}
/// <remarks/>
[System.Xml.Serialization.XmlAttributeAttribute()]
public ushort completeListSize
{
get
{
return this.completeListSizeField;
}
set
{
this.completeListSizeField = value;
}
}
/// <remarks/>
[System.Xml.Serialization.XmlAttributeAttribute()]
public byte cursor
{
get
{
return this.cursorField;
}
set
{
this.cursorField = value;
}
}
/// <remarks/>
[System.Xml.Serialization.XmlTextAttribute()]
public string Value
{
get
{
return this.valueField;
}
set
{
this.valueField = value;
}
}
}
}
我怎样才能xml多次反序列化？