在 Xamarin.Android 中生成 XML 的 Web 服务错误

Question

我正在尝试将一组自定义对象发送到 Web 方法 (.asmx)，但它引发了序列化错误。从 Web 项目调用 Web 方法时工作正常，但 Xamarin 正在苦苦挣扎，当我单击“显示详细信息”时，xamarin 会抛出自己的错误，即“路径中的非法字符”，这对我没有帮助调试工作。

据我所知，自定义对象的属性中没有“非法字符”；它们都是基本类型，例如 int、string 等。

有没有人遇到过这个问题，或者知道我该如何调试？

完整的错误信息：

 System.InvalidOperationException has been thrown
    There was an error generating the XML document.

出现在这段代码 sn-p 处（来自网络参考生成的 Reference.cs）：

        public void InsertClockEntries(ClockentryPublicInfo[] entries) {
            this.Invoke("InsertClockEntries", new object[] {
                        entries});
        }

编辑：这是来自 Android 日志的堆栈跟踪：

E/mono-rt ( 6638): [ERROR] FATAL UNHANDLED EXCEPTION: System.InvalidOperationException: There was an error generating the XML document. ---> System.InvalidOperationException: '10' is not a valid value for MobileTimeClock.secure.timedock.com.v2.ClockingAction.

E/mono-rt ( 6638):   at System.Xml.Serialization.EnumMap.GetXmlName (System.String typeName, System.Object enumValue) [0x00000] in <filename unknown>:0 

E/mono-rt ( 6638):   at System.Xml.Serialization.XmlSerializationWriterInterpreter.GetEnumXmlValue (System.Xml.Serialization.XmlTypeMapping typeMap, System.Object ob) [0x00000] in <filename unknown>:0 

E/mono-rt ( 6638):   at System.Xml.Serialization.XmlSerializationWriterInterpreter.GetStringValue (System.Xml.Serialization.XmlTypeMapping typeMap, System.Xml.Serialization.TypeData type, System.Object value) [0x00000] in <filename unknown>:0 

E/mono-rt ( 6638):   at System.Xml.Serialization.XmlSerializationWriterInterpreter.WritePrimitiveValueLiteral (System.Object memberValue, System.String name, System.String ns, System.Xml.Serialization.XmlTypeMapping mappedType, System.Xml.Serialization.TypeData typeData, Boolean wrapped, Boolean isNullable) [0x00000] in <filename unknown>:0 

E/mono-rt ( 6638):   at System.Xml.Serialization.XmlSerializationWriterInterpreter.WriteMemberElement (System.Xml.Serialization.XmlTypeMapElementInfo elem, System.Object memberValue) [0x00000] in <filename unknown>:0 

E/mono-rt ( 6638):   at System.Xml.Serialization.XmlSerializationWriterInterpreter.WriteElementMembers (System.Xml.Serialization.ClassMap map, System.Object ob, Boolean isValueList) [0x00000] in <filename unknown>:0 

E/mono-rt ( 6638):   at System.Xml.Serialization.XmlSerializationWriterInterpreter.WriteObjectElementElements (System.Xml.Serialization.XmlTypeMapping typeMap, System.Object ob) [0x00000] in <filename unknown>:0 

E/mono-rt ( 6638):   at System.Xml.Serialization.XmlSerializationWriterInterpreter.WriteObjectElement (System.Xml.Serialization.XmlTypeMapping typeMap, System.Object ob, System.String element, System.String namesp) [0x00000] in <filename unknown>:0 

E/mono-rt ( 6638):   at System.Xml.Serialization.XmlSerializationWriterInterpreter.WriteObject (System.Xml.Serialization.XmlTypeMapping typeMap, System.Object ob, System.String element, System.String namesp, Boolean isNullable, Boolean needType, Boolean writeWrappingElem) [0x00000] in <filename unknown>:0 

E/mono-rt ( 6638):   at System.Xml.Serialization.XmlSerializationWriterInterpreter.WriteMemberElement (System.Xml.Serialization.XmlTypeMapElementInfo elem, System.Object memberValue) [0x00000] in <filename unknown>:0 

E/mono-rt ( 6638):   at System.Xml.Serialization.XmlSerializationWriterInterpreter.WriteListContent (System.Object container, System.Xml.Serialization.TypeData listType, System.Xml.Serialization.ListMap map, System.Object ob, System.Text.StringBuilder targetString) [0x00000] in <filename unknown>:0 

E/mono-rt ( 6638):   at System.Xml.Serialization.XmlSerializationWriterInterpreter.WriteMemberElement (System.Xml.Serialization.XmlTypeMapElementInfo elem, System.Object memberValue) [0x00000] in <filename unknown>:0 

E/mono-rt ( 6638):   at System.Xml.Serialization.XmlSerializationWriterInterpreter.WriteElementMembers (System.Xml.Serialization.ClassMap map, System.Object ob, Boolean isValueList) [0x00000] in <filename unknown>:0 

E/mono-rt ( 6638):   at System.Xml.Serialization.XmlSerializationWriterInterpreter.WriteMembers (System.Xml.Serialization.ClassMap map, System.Object ob, Boolean isValueList) [0x00000] in <filename unknown>:0 

E/mono-rt ( 6638):   at System.Xml.Serialization.XmlSerializationWriterInterpreter.WriteMessage (System.Xml.Serialization.XmlMembersMapping membersMap, System.Object[] parameters) [0x00000] in <filename unknown>:0 

E/mono-rt ( 6638):   at System.Xml.Serialization.XmlSerializationWriterInterpreter.WriteRoot (System.Object ob) [0x00000] in <filename unknown>:0 

E/mono-rt ( 6638):   at System.Xml.Serialization.XmlSerializer.Serialize (System.Object o, System.Xml.Serialization.XmlSerializationWriter writer) [0x00000] in <filename unknown>:0 

E/mono-rt ( 6638):   at System.Xml.Serialization.XmlSerializer.Serialize (System.Xml.XmlWriter xmlWriter, System.Object o, System.Xml.Serialization.XmlSerializerNamespaces namespaces) [0x00000] in <filename unknown>:0 

E/mono-rt ( 6638):   --- End of inner exception stack trace ---

E/mono-rt ( 6638):   at System.Xml.Serialization.XmlSerializer.Se

Answer 1

原来它是由具有整数值的可枚举引起的。这些值不会通过 Web 服务公开。

SO answer with link to explain how enumerables lose their value in web services

所以一个像这样的枚举：

Public Enum ClockAction
   IN = 10
   OUT = 20
End Enum 

将作为没有值的枚举公开，如下所示：

Public Enum ClockAction
   IN
   OUT
End Enum

我们将值作为整数存储在 SQLite 数据库中，并在为我们的 Web 服务序列化对象时尝试将它们转换回 ClockAction 枚举。这就是它失败的原因。