Is there a way to make a serialized member to serialize as an attribute:
<Serializable>
Public Class Person
Public Property Name As String
End Class
I want than when this class is xml-serialized, it should produce:
<Person Name="John Doe" />
And what I mean is that instead of the Name property should be serialized as an element, it should be serialized as an xml attribute.
I think you're looking for the XmlAttribute attribute:
<Serializable()>
Public Class Person
<Xml.Serialization.XmlAttribute()>
Public Property Name() As String
End Class
See more details and Xml-serialization attributes here.
Related
Here is my entity class:
public class User {
#Id
UserIdentifier userIdentifier;
String name;
}
public class UserIdentifier {
String ssn;
String id;
}
Here is what I am trying to do:
public interface UserRepository extends MongoRepository<User, UserIdentifier>
{
User findBySsn(String ssn);
}
I get an exception message (runtime) saying:
No property ssn found on User!
How can I implement/declare such a query?
According to Spring Data Repositories reference:
Property expressions can refer only to a direct property of the managed entity, as shown in the preceding example. At query creation time you already make sure that the parsed property is a property of the managed domain class. However, you can also define constraints by traversing nested properties.
So, instead of
User findBySsn(String ssn);
the following worked (in my example):
User findByUserIdentifierSsn(String ssn);
I am using XmlSerializer instead of DataContractSerializer in my ASP.NET Web API project and have a return object defined as
Response Object
public class MyResponse
{
public string Name {get;set;}
public CustomField<string> Username {get;set;}
public CustomField<float?> Score {get;set;}
}
Custom Field
public class CustomField<T>
{
public T Value {get;set;}
public long LastModified {get;set;}
}
I want to generate an XML response as
<MyResponse>
<FirstName>ABC</FirstName>
<Username lastModified="1234">XYZ</Username>
<Score lastModified="45678">12002</Score>
</MyResponse>
ASP.NET Web API returns a JSON object (I am aware that this happens when XmlSerialization does not work correctly) when I decorate the CustomField class as
public class CustomField<T>
{
[XmlText]
public T Value {get;set;}
[XmlAttribute]
public long LastModified {get;set;}
}
How can I get the desired XML response ?
Alright, I think I know what's going on.
If you try to run
new XmlSerializer(typeof(MyResponse))
you'll get this error:
System.InvalidOperationException: Cannot serialize member 'Value' of type System.Nullable`1[System.Single]. XmlAttribute/XmlText cannot be used to encode complex types.
So the issue is that you have a field of type 'float?' as an [XmlText]. [XmlText] can only be applied to primitives, and it doesn't look like XmlSerializer recognizes 'float?' as a primitive. If you use 'float' instead of 'float?', everything looks to be working right. If you want to indicate that sometimes there is no Score, you may want to set the Score to null instead of the Score's value to null.
Hope that helps.
I have an enum property. I want the serialized XML for this property to be the splitted camel-case string of the enum and vice versa.
I have two functions, one is ConcatCamelCase and the other is SplitCamelCase, I want the serializer to use them accordingly, is this possible by just decorating the field with an attribute?
If no, what are the other option without having to mess with all the other fields?
You'll have to do something like this:
public class SomeClass {
[XmlIgnore]
public MyEnum MyRealProperty {get;set;}
[XmlElement("MyRealProperty")]
[EditorBrowsable(EditorBrowsableState.Never), Browsable(false)]
public string MyProxyProperty
{
get {return SplitCamelCase(MyRealProperty);}
set {MyRealProperty = ConcatCamelCase(value);}
}
}
You can explicitly set the name of everything that is serialized using the XMlSerialization attributes.
[XmlRoot("theNameYouWant")]
[XmlElement("theNameYouWant")]
As far as I am aware, for the property to be saved in the database it cannot be ReadOnly.
IIdentity properties: AuthenticationType, IsAuthenticated and Name are all ReadOnly.
Is making the wrapper to the properties that need to be saved the only solution or there are better ones?
EDIT:
I might not have explained my question that well. Here is the sample code for one of the ReadOnly properties, I have added UserName property for the Entity Framework:
Public Property UserName As String
Get
Return _userName
End Get
Private Set(value As String)
userName = value
End Set
Public ReadOnly Property Name As String Implements System.Security.Principal.IIdentity.Name
Get
Return UserName
End Get
End Property
What I wanted to ask is if there is any better way of doing it.
IIdentity properties are read only but the implementation can have setters. If you are using EDMX for mapping you don't have to expose these setters as public.
Edit:
This is possible in C# so hopefully you can use similar approach with VB.NET (I can only read VB code, not write):
public interface ITest {
string Name { get; }
}
public class Test : ITest {
public string Name { get; set; }
}
The class offers setter even the interface didn't define it.
The EF persists objects, not interfaces. Your object can have whatever properties you would like it to have. You cannot add an interface to your entity model, but you can add an object type which implements that interface.
I have a stored procedure in my Entity Framework Model. I've added a Function Import and mapped the results to a Complex Type.
I want to add an extra property to this Complex type, that I'll populate in my Domain Service, not coming back from the stored procedure. I added a myClass.shared.cs file and implemented added the property like so:
//myClass.shared.cs
public partial class myClass
{
public string myProperty {get;set;}
}
I populate this in my domain service when I return the object, e.g.:
public myClass GetMyClass(int myClassID)
{
myClass theClass= this.ObjectContext.StoredProc(myClassID).FirstOrDefault();
class.myProperty = 12345;
return theClass;
}
When I get the return values of this method on the client side theClass.myProperty is always null but all values from the stored procedure are populated, am I missing something?
I've tried decorating the myProperty with the [DataMember] attribute but this throws the error:
"The type 'myClass' already contains a
definition for 'myProperty'"
How can I get this to return the value set in the Domain Service to the client?
There was no need to put this in the shared.cs class. The shared.cs class copies the actual code over to the client side and is useful for adding methods etc. but to add a new property, all I had to do was add a partial class (NOT in myClass.shared.cs) and decorate it with DataMember.
public partial class myClass
{
[DataMember]
public string myProperty {get;set;}
}