Using the xsd.exe tool, class are generate from a xsd file.
I would like to change the name of a root element put I can not since the XmlRootElementAttribute can not be duplicate. So idealy I would like that the xsd tool generate a partial classe like this:
...
[System.Xml.Serialization.XmlRootAttribute(ElementName="Request", IsNullable=false)]
public partial class SendMessage { ... }
But I have no clue how to change the ElementName propertie.
Thanks
I take your XSD defines an element SendMessage, and you want the annotation to be something else, Request in your case.
Short answer is no, it cannot be done with XSD.exe alone; the tool doesn't allow a syntax where one can customize the name of the generated classes.
Which brings in the long version of the answer... The annotations always reflect what the XML is. If you change the ElementName value, then your generated XML will be different. If you want the XML different, then you should change the schema file instead.
This is the kind of question that needs a lot of explaining as to why would one want this... in order to get a positive answer, as in "yes, this is how achieve the why".
Related
I have a myXML.xml file.
I used xsd.exe to generate and myXMLClass.cs class files which contains many partial classes.
Now, I want to use this myXMLClass.cs class and retrieve all the nodes/attributes/values/data using my original myXML.XML file. But, how can I do this because of myXMLClass.cs has so many partial classes?
eg. I want to do deserializing using TypeOf myXMLClass like like this. But, myXMLClass contains many partial classes.
XmlSerializer serializer = new XmlSerializer(typeof(myXMLClass??));
Thank you
Update:
Also, I am having problem with obtaining the "code" and "description" of this tag that has this kind of setup.
<HitCode code="4" description="CONSUMER DECLARATION" />
Again, my goal is to retrieve "code" and "description" of this tage.
I ended up ditching the XSD.EXE generated .CS class.
I decided to make my own object class which resemble the XML schema and it works.
#Seminda Thank you for the suggestion.
I'm trying to deserialize an XML with the following element with .NET XmlSerializer :
<SomeElement Foo_x003a_Bar="123"/>
In the target class, there's the following declaration:
class SomeElement
{
//...
[XmlAttribute("Foo_x003a_Bar")]
public string Foo_Bar;
}
The attribute is not being read from XML. In the UnknownAttribute event handler, I see that Foo_x003a_Bar is not recognized, and the list of valid attributes (Args.ExpectedAttributes) instead includes Foo_x005F_x003a_Bar.
What's the deal here, please? 0x5F is the code for the undescore character. Other attributes in the same element/class with names that contain _x0020_ deserialize properly. Why does _x003a_ get some kind of a special treatment?
EDIT: dirty hackery in the form of search/replacing in the XML string before it's parsed helps. But still.
EDIT2: the functions that implement this kind of encoding are XmlConvert:EncodeName, XmlConvert:EncodeLocalName. The latter handles colons, the former doesn't. Looks like they're calling EncodeName...
EDIT3: filed a bug report with Microsoft. Please navigate there and click "I can too" if you can, too :)
Looks like you are right about the treatment for _x<char-code>_ element names (described here), which uses XmlConvert.EncodeLocalName.
Given that you've instantiated your XmlSerializer using the only the type argument, the namespace is assumed to be empty.
What should work in your case is to simply use the decoded element names in your XmlAttributeAttribute settings:
class SomeElement
{
//...
[XmlAttribute("Foo:Bar")]
public string Foo_Bar;
}
One important factor here is casing, the XML node needs to have <Foo_x003A_Bar>, with a capital A.
The encoded node name needs to be consistent with XmlConvert.EncodeLocalName:
XmlConvert.EncodeLocalName("Foo:Bar")
// Foo_x003A_Bar
I know this is pretty silly but just wondered if anyone had a link or knows exactly what this code is doing on my page?
namespace com.gvinet.EblAdapter.ebl
{
[Serializable]
[DesignerCategory("code")]
[GeneratedCode("System.Xml", "4.0.30319.225")]
[DebuggerStepThrough]
[XmlType(Namespace = "http://addresshere")]
public class TSAPassenger
{
then here is all of the strings for the form like name, address and such
I am thinking it is trying to grab the XML file that was created from the Database but just want to make sure.
It is not. These are all just metadata attributes.
Serializeable - Use the standard XmlSerializer to take public properties and fields and convert to XML for transport using no customization to the format (like ISerializable would). It is usually only used when going out of process (remoting, Web Services, WCF, etc)
DesignerCategory - This can be used a number of ways. This one tends to be used by the property grid in visual studio as a way to organize sections.
GeneratedCode - The application generated it for you, utilizing the System.Xml namespace in version 4.0.
DebuggerStepThrough - If you are stepping through code (F11), by default, skip over anything here (don't step into a property getting for example).
XmlType - Part of the serializer that allows you to provide a specific namespace that is generated in the output.
The items here do not actually get anything, just describe certain aspects of how something may be loaded/handled.
Hope that makes sense.
The Serializable and XmlType attributes are instructing the XML serializer that the class can be serialized and the schema to use when doing so.
XmlType Attribute
Serializable Attribute
DesignerCategory("code") Attribute
DebuggerStepThrough Attribute
These are attributes - used for declarative programming - you can find more about declarative programming online. But here is the link to .net attribute hierarchy page to get you started: http://msdn.microsoft.com/en-us/library/aa311259(VS.71).aspx
Also, these pages may be helpful:
What are attributes: What are attributes in .NET?
Attributes in C#: http://www.codeproject.com/Articles/2933/Attributes-in-C
Hello I am working on an project in which I should serialize and deserialize my objects to Xml and back to objects. I use the XmlSerializer class in order to achieve this. So my problem is that I can't figure out how to prevent the serialization if the attribute value of an element is invalid. For example I have an element with name person which contain 1 attribute (name)
I would like to prevent the user to put other names than (Alex, Nick,..) in this attribute I need something like xsd restriction (pattern) in this case but for my model. How can I solve this problem?
If you just want conditional serialisation, you can do this with the ShouldSerialize* pattern. So if you have a property Name (for example), you can add:
public bool ShouldSerializeName() {
/* validate; return true to serialize, false to skip */
}
The method needs to be public for XmlSerializer, although the same pattern works in other places (System.ComponentModel, for example) even if no-public.
I'm not sure weather it is a good idea to ignore some data in certain circumstances, but if you really wanna do this, take a look at the IXmlSerializable Interface. I think implementing this interface manually will be the only way to fulfill your requirements.
The Xml response I receive is as follows:
<response>
<item xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="java:com.someDomain.item">
<name>some name</disc-name>
<description>some description</disc-desc>
</item>
<item xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="java:com.someDomain.item">
<name>some name</disc-name>
<description>some description</disc-desc>
</item>
<otherValue>12.1</otherValue>
</response>
My class is decorated as such:
[XmlElement("item")]
public Item[] Items{get;set;}
[XmlElement("otherValue")
public string OtherValue{get;set;}
When I attempt to deserialize the above Xml to the class described, I receive an error of "Namespace prefix 'java' is not defined". Adding the "namespace" attribute to the class resolves the parsing error(however, the xml is then distorted from the original).
ie
[XmlElement(ElementName="item",Namespace="java")]
How should I be decorating a given property to match up with a new namespace? Or, how do I correctly define the namespace?
I'm not 100% on using a stock array for my enumerable section either, but I think the namespace issue takes precident at the moment. Any insight or thoughts are greatly appreciated!
UPDATE:
I think the question is better rephrased now that I've gone back and forth a bit:
How do you use an XmlElementAttribute(or other attribute) to have a class that can serialize into the item snippet above, including the xsi tags?
As for my particular problem, I've realized since the Xml response is out of my control, I don't need the xsi attributes to begin with. To workaround the serialization issue, I'm simply doing the following(XmlElement element contains the original document above):
foreach(XmlNode node in element)
node.Attributes.RemoveAll();
I'm only noting my personal workaround as this is not actually a solution.
You were right the first time. "java" is not a namespace. It's a namespace prefix. That's an abbreviation of the namespace, for use in the XML. Otherwise, the actual namespace would need to be repeated wherever you currently see "java:".
You can use List<Item> instead of Item[].
Unfortunately this is valid XML, and completely conforms to the XML Standard.
It validates, it's correct and it's complete.
The problem you're having is in the deserialization, which is not a part of the XML Standard and is related to how .NET maps declared XML types to internal CLR types.
The xsi:type is a namespace reference and is intended to allow XML documents to substitute a derived type from another namespace for the declared type in the schema.
I know from my own experience that coders tend to react in shock that this sort of thing is even legal, much less correct XML. It basically hijacks your schema.
You do not need even need to include the foreign namespace in order for this to be considered correct.
(see this article for more ranting on this subject: http://norman.walsh.name/2004/01/29/trainwreck)
Now, as to how to handle your stated problem: deserialize this mess.
1) process the xml text and remove the xsi-types declaration and hope there are no fields declared that extend the base type.
2) declare a type that derives from your base type in the schema.
This looks like the following:
// note this "XmlIncludeAttribute" references the derived type.
// note that in .NET they are in the same namespace, but in XML they are in different namespaces.
[System.Xml.Serialization.XmlIncludeAttribute(typeof(DerivedType))]
[System.SerializableAttribute()]
[System.Xml.Serialization.XmlTypeAttribute(Namespace="http://BaseNameSpace")]
[System.Xml.Serialization.XmlRootAttribute(Namespace="http://BaseNameSpace", IsNullable=true)]
public partial class MyBaseType : object
{
...
}
/// <remarks/>
[System.SerializableAttribute()]
[System.Xml.Serialization.XmlTypeAttribute(Namespace="http://DerivedNameSpace")]
[System.Xml.Serialization.XmlRootAttribute(Namespace="http://DerivedNameSpace", IsNullable=true)]
public partial class DerivedType: MyBaseType
{
...
}
This is only a rough outline, hopefully enough to get you started. Note that this is not an easy problem to solve progmatically because it's always possible for someone to feed you XML and it will validate but not deserialize properly.