I am deserializing a xml file with an attribute and a xml text. The problem is that those elements have the same attributes. So I am always getting the error that I must not have two identical TypeNames in XmlType.
My xml:
<group_id xsi:type="xsd:int">1</group_id>
<name xsi:type="xsd:int">myNameView</name>
And my C#:
[XmlType(AnonymousType = true, Namespace = "http://www.w3.org/2001/XMLSchema", TypeName = "int")]
[XmlRoot(ElementName = "group_id")]
public class Group_id
{
[XmlAttribute(AttributeName = "type", Namespace = "http://www.w3.org/2001/XMLSchema-instance")]
public string Type { get; set; }
[XmlText]
public string Text { get; set; }
}
[XmlType(AnonymousType = true, Namespace = "http://www.w3.org/2001/XMLSchema", TypeName = "int")]
[XmlRoot(ElementName = "name")]
public class Name
{
[XmlAttribute(AttributeName = "type", Namespace = "http://www.w3.org/2001/XMLSchema-instance")]
public string Type { get; set; }
[XmlText]
public string Text { get; set; }
}
The problem is the TypeName in XmlType Attribute. If I name only one element with a TypeName it is correctly deserialized.
XmlSerializer handles types for you, based on the xsi:type attribute. By trying to handle these yourself, you're causing it some grief.
If you declare your elements as object, then the serializer will use the type attributes to determine how to deserialize the values. Note as your example is just a fragment, I've assumed root element called root:
[XmlRoot("root")]
public class Root
{
[XmlElement("group_id")]
public object GroupId { get; set; }
[XmlElement("name")]
public object Name { get; set; }
}
Now when you deserialize your example, you'd actually get an exception (as myNameView isn't an integer). You can fix by either changing the type to xsd:string or changing the value to a valid integer.
In the event the XML was valid, you'd see that the types deserialized map directly to the type attributes. See this fiddle for a working demo.
Related
I am working on deserializing the following XML document into a C# class:
<Station>
<station_id>KMSP</station_id>
<wmo_id>72658</wmo_id>
<latitude>44.88</latitude>
<longitude>-93.23</longitude>
<elevation_m>255.0</elevation_m>
<site>MINNEAPOLIS</site>
<state>MN</state>
<country>US</country>
<site_type>
<METAR />
<TAF />
</site_type>
</Station>
This is the class that it is being deserialized into:
public class Station
{
[XmlElement(ElementName ="station_id")]
public string StationId { get; set; }
[XmlElement(ElementName = "wmo_id")]
public string WmoId { get; set; }
[XmlElement(ElementName ="latitude")]
public double Latitude { get; set; }
[XmlElement(ElementName = "longtitude")]
public double Longtitude { get; set; }
[XmlElement(ElementName="site")]
public string Site { get; set; }
[XmlElement(ElementName ="state")]
public string State { get; set; }
[XmlElement(ElementName ="country")]
public string Country { get; set; }
[XmlElement(ElementName = "site_type")]
public string[] SiteType { get; set; }
}
Everything seems to be deserializng correctly, except for the <site_type> tag. The contents of this tag will vary from Station to Station, but will always contain one or more items of a specific value - essentially from an enum. These tags are always self closing and do not ever contain attributes. They are strictly in the <METAR /> format. When I attempt to deserialize this XML, I get a ReadElementContentAs() error, and I am 99% sure it's that tag that is causing the issue. Would anyone happen to know where I went wrong on this, or have any advice on how to deserialize that kind of element?
Thank you!
Taking your comment on this answer into account
For clarifcation, these type tags in the SiteType will never contain any data like the other tags. If the tag is present, it means that this weather station produces that type of report (METAR, TAF, SIGMENTS, etc)
That SiteType isn't an array of strings, but an array of types, with a different one per report type. All share the same base class.
public abstract class SiteType
{ }
public class Metar : SiteType
{ }
public class Taf : SiteType
{ }
That SiteType property then looks like below
[XmlArray(ElementName = "site_type")]
[XmlArrayItem(typeof(Metar), ElementName ="METAR")]
[XmlArrayItem(typeof(Taf), ElementName = "TAF")]
public SiteType[] SiteType { get; set; }
To check whether a certain report type is supported for a station, you check for the presence of the corresponding type within that SiteType array.
var hasMetar = p.SiteType.Any(o => o.GetType() == typeof(Metar));
You can declare a property as follows:
[XmlAnyElement(Name = "site_type")]
public XmlElement SiteType { get; set; }
After deserialization, there will be a collection of nodes in the property.
foreach(XmlNode node in station.SiteType.ChildNodes)
Console.WriteLine(node.Name);
I cant get the following XML deserialized because of the "type" attribute.
What I've tried so far:
The XML I want to deserialize:
<foundEntities>
<staticGroup xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="ns1:StaticGroupType">
<number>10000</number>
<name>Gruppe A</name>
</staticGroup>
</foundEntities>
The Class:
[XmlRootAttribute(Namespace = "", IsNullable = false, ElementName = "foundEntities")]
public class FoundEntities
{
[XmlElement(ElementName = "staticGroup", Namespace = "")]
public StaticGroup staticGroup { get; set; }
}
[XmlRoot(ElementName = "staticGroup")]
[XmlInclude(typeof(StaticGroupType))]
public class StaticGroup
{
[XmlElement(ElementName = "number")]
public string number { get; set; }
[XmlElement(ElementName = "name")]
public string name { get; set; }
}
public class StaticGroupType : StaticGroup
{
}
Probably I am blind but what do I miss here? Any hint is highly appreciated.
I have generated the classes using https://xmltocsharp.azurewebsites.net/ and it gave me the following output:
[XmlRoot(ElementName = "staticGroup")]
public class FoundStaticGroup
{
[XmlElement(ElementName = "number")]
public string Number { get; set; }
[XmlElement(ElementName = "name")]
public string Name { get; set; }
[XmlAttribute(AttributeName = "xsi", Namespace = "http://www.w3.org/2000/xmlns/")]
public string Xsi { get; set; }
[XmlAttribute(AttributeName = "type", Namespace = "http://www.w3.org/2001/XMLSchema-instance")]
public string Type { get; set; }
}
[XmlRoot(ElementName = "foundEntities")]
public class FoundGroupEntities
{
[XmlElement(ElementName = "staticGroup")]
public StaticGroup StaticGroup { get; set; }
}
But what I get now is an error as already had a few times before:
"The specified type was not recognized: name='StaticGroupType', namespace='http://com.f24.soap.fwi.schema', at ."
I have posted a working solution here:
DotNetFiddle Link
I'm not sure if there are external schemas but I had to remove xsi:type="ns1:StaticGroupType" to get it to work. Your XML won't parse in most readers unless there is a definition for that namespace in the XML or a schema. Not knowing what your backend service is, I can't recommend how to resolve this.
The biggest issue is you had both your classes marked with the XmlRootAtribute code attribute. Only one class can represent the root in your example. I also removed unnecessary attributes like Namespace that don't have any impact since you are using the default namespace.
Update
The issue here is with the incoming XML it is not complete, it needs a schema reference to be able to resolve the StaticGroup type. You will have to contact the people on the backend to fix this, or strip that part of the XML manually. Correct XML would be as shown below:
<foundEntities
xsi:schemaLocation="http://com.f24.soap.fwi.schema (url to back-end schema here)">
<staticGroup xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="ns1:StaticGroupType">
<number>10000</number>
<name>Gruppe A</name>
</staticGroup>
</foundEntities>
Below I have the following objects:
[XmlRoot("ExampleObject")]
public class ExampleObject
{
[XmlElement("element1")]
public long element1{ get; set; }
[XmlElement("element2")]
public string element2{ get; set; }
[XmlElement("element3")]
public string element3{ get; set; }
[XmlElement("element4")]
public ExampleObject2 element4{ get; set; }
}
[Serializable()]
public class ExampleObject2
{
[XmlText]
public string Value { get; set; }
[XmlAttribute]
public string Id { get; set; }
[XmlAttribute]
public string Ref { get; set; }
}
and the following XML:
<c:ExampleObject>
<c:element1>
...
</c:element1>
<c:element2>
...
</c:element2>
<c:element3>
...
</c:element3>
<c:element4 z:Ref="953" i:nil="true"/> <!--- or this <c:Status z:Id="953">...</c:element4> -->
</ExampleObject>
I am able to get my object perfectly fine, except for element4 where inside ExampleObject2 my Id and Ref are null while Value has the correct value inside.
I want it so that ExampleObject2 always has a Value, it is either null or the value it is supposed to has. I want Id and Ref to be the value of the attribute inside element4 depending on if element4 has that attribute or not.
I was wondering if there's something I am missing?
I have also tried to add specific names for the XMLElement tags like this [XmlAttribute("Id")] but that doesn't seem to do anything. I have also tried including the namespace like this [XmlAttribute("z:Id")] but that causes an error.
I have also tried putting IsNullable within the element4 XMLElement tag but for the XML elements that have nil="true" but it makes the entire ExampleObject2 null which isn't exactly what I am looking for.
I've already looked at the following question and have come to the same issue.
how to deserialize an xml node with a value and an attribute using asp.net serialization
Thank you
I ended up fixing it with the Nil property like #GeorgeBirbilis said and used it with #dbc's solution to manually naming the namespaces the z: and c: are from. I was only doing one or the other, not both combined. Thank you guys for the help.
[XmlAttribute(Namespace = "http://schemas.microsoft.com/2003/10/Serialization/")]
public int Id { get; set; }
[XmlAttribute(Namespace = "http://schemas.microsoft.com/2003/10/Serialization/")]
public int Ref { get; set; }
private bool _nil;
[XmlAttribute("nil", Namespace = "http://www.w3.org/2001/XMLSchema-instance")]
public bool Nil
{
get
{
return _nil;
}
set
{
_nil = value;
}
}
I'm using the .NET XmlSerializer class to deserialize some XML document. In that document, I have an element that looks like that:
<MyElement attr1="xxx" attr2="yyy">VALUE</MyElement>
This is a part of a bigger XML. I need to deserialize this string into an object, so I wrote:
public class MyElement
{
[XmlAttribute(AttributeName = "attr1")]
public string attr1 { get; set; }
[XmlAttribute(AttributeName = "attr2")]
public string attr2 { get; set; }
[??????????????]
public string value { get; set; }
}
And I can't figure out what to put instead of the question marks in order to get the value of the element into the value.
XmlTextAttribute:
By default, the XmlSerializer serializes a class member as an XML element. However, if you apply the XmlTextAttribute to a member, the XmlSerializer translates its value into XML text. This means that the value is encoded into the content of an XML element.
[XmlText]
public string Value { get; set; }
If the XmlTextAttribute does not work, you could use the XmlElementAttribute
[XmlElement( DataType = "string", ElementName = "value" )]
public string value { get; set; }
I have the following XML snippet:
<dmFiles>
−
<dmFile dmUpFileGuid="" dmFileDescr="testcase01.pdf" dmFileMetaType="main" dmFileGuid="" dmMimeType="pdf" dmFormat="">
If I create a strongly typed C# class with string properties for the dmFile attributes (eg: dmFileDescr), how can I ensure these attributes will serialize to properties in my c# class?
By using Xml attributes on your class member. Use [XmlAttribute("name")].
Your implementation would look like this:
[XmlRoot("dmFile")]
public class DmFile
{
[XmlAttribute("dmUpFileGuid")]
public String UpFileGuid { get;set; }
...
}
Try this:
[Serializable]
[XmlRoot(ElementName="dmFile")]
public class File
{
[XmlAttribute(AttributeName="dmUpFileGuid")]
public string UploadGuid { get; set; }
[XmlAttribute(AttributeName = "dmFileDescr")]
public string Description { get; set; }
[XmlAttribute(AttributeName = "dmFileMetaType")]
public string MetaType { get; set; }
[XmlAttribute(AttributeName = "dmFileGuid")]
public string FileGuid { get; set; }
[XmlAttribute(AttributeName = "dmMimeType")]
public string MimeType { get; set; }
[XmlAttribute(AttributeName = "dmFormat")]
public string Format { get; set; }
}
And deserialize your XML as follow:
XmlSerializer s = new XmlSerializer(typeof(File));
File file = s.Deserialize(new StringReader(#"<dmFile ... />")) as File;
You can (de)serialize from/to XML with the XmlSerializer and marking up the target class with Attributes provided for Xml-Serialization.
Mark your public properties with the correct attribute. It should be XmlAttributeAttribute.
The enclosing class must map on the dmFile-Element (XmlRootAttribute)
If the property is called differently, or the class is called differently than the XML element, you need to specify the XML-Element/Attribute name.