Oczywiście ta odpowiedź jest zbyt późno! Ale może przydatne dla innych programistów ;-). Użyłem relaksu do rozwiązania tego problemu, ponieważ musiał on być zautomatyzowany.
Należy wywołać metodę statyczną CreateMessageType. musi być serializowaną klasą NIE zawierającą właściwości schemaLocation. Ta metoda zwraca nowy typ za pomocą elementu nadrzędnego (o nazwie Dynamiczny), ale dodaje właściwości schemaLocation i ustawia właściwość ElementName na wartość XmlRootAttribute.
Po utworzeniu typu należy ponownie użyć odbicia, aby utworzyć obiekt i ustawić jego właściwości.
Kod wygląda na dość bolesny w xxx, ale działa jak urok!
Zobacz kodowanie poniżej:
/// <summary>Copying the attributes of a type to a new type</summary>
private static void copyAttributes<TMessage>(TypeBuilder dynamictype)
{
try
{
//Iterate over all attributes of the TMessage class and copy these to the new type
IList<CustomAttributeData> attributes = CustomAttributeData.GetCustomAttributes(typeof(TMessage));
if (attributes != null)
{
foreach (CustomAttributeData attribute in attributes)
{
List<object> constructorarguments = new List<object>();
if (attribute.ConstructorArguments != null)
{
foreach (CustomAttributeTypedArgument argument in attribute.ConstructorArguments)
{
constructorarguments.Add(argument.Value);
}
}
List<FieldInfo> namedfields = new List<FieldInfo>();
List<object> namedfieldarguments = new List<object>();
List<PropertyInfo> namedproperties = new List<PropertyInfo>();
List<object> namedpropertyarguments = new List<object>();
if (attribute.NamedArguments != null)
{
//Iterate over all named arguments
foreach (CustomAttributeNamedArgument argument in attribute.NamedArguments)
{
//Check which type of argument is found
if (argument.MemberInfo is FieldInfo)
{
FieldInfo field = argument.MemberInfo as FieldInfo;
namedfields.Add(field);
namedfieldarguments.Add(argument.TypedValue.Value);
}
else if (argument.MemberInfo is PropertyInfo)
{
PropertyInfo property = argument.MemberInfo as PropertyInfo;
namedproperties.Add(property);
namedpropertyarguments.Add(argument.TypedValue.Value);
}
}
}
//Check if the current attribute is of type XmlRoot.
//In this case the ElementName or TypeName property must also be set
if (attribute.Constructor.DeclaringType.Equals(typeof(XmlRootAttribute)))
{
namedproperties.Add(typeof(XmlRootAttribute).GetProperty("ElementName"));
namedpropertyarguments.Add(typeof(TMessage).Name);
}
//Build the copy of the parent attribute
CustomAttributeBuilder copyattributebuilder = new CustomAttributeBuilder(
attribute.Constructor,
constructorarguments.ToArray(),
namedproperties.ToArray(),
namedpropertyarguments.ToArray(),
namedfields.ToArray(),
namedfieldarguments.ToArray());
//Add the attribute to the dynamic type
dynamictype.SetCustomAttribute(copyattributebuilder);
}
}
}
catch (Exception exception)
{
throw new ApplicationException("Unable to copy attribute from parent type", exception);
}
}
/// <summary>Create dynamic type for an operation message which includes the types for serialization</summary>
/// <returns>Returns dynamic type</returns>
public static Type CreateMessageType<TMessage>()
{
try
{
AssemblyBuilder assemblybuilder = AppDomain.CurrentDomain.DefineDynamicAssembly(new AssemblyName(Guid.NewGuid().ToString()), AssemblyBuilderAccess.Run);
ModuleBuilder modulebuilder = assemblybuilder.DefineDynamicModule(Guid.NewGuid().ToString(), false);
//Create type based on an unique so that it does not conflict with the OperationMessage classname
TypeBuilder typebuilder = modulebuilder.DefineType(typeof(TMessage).Name + "Dynamic", TypeAttributes.Public | TypeAttributes.Class);
//Set original message type as parent of the new dynamic type
typebuilder.SetParent(typeof(TMessage));
//Copy attributes from TMessage paren type to the dynamic type
WMQXMLMessageTypeFactory.copyAttributes<TMessage>(typebuilder);
//Create the xsi:schemaLocation property
CustomAttributeBuilder attributebuilder = new CustomAttributeBuilder(
typeof(XmlAttributeAttribute).GetConstructor(new Type[] { typeof(string) }),
new object[] { "schemaLocation" },
new PropertyInfo[] { typeof(XmlAttributeAttribute).GetProperty("Namespace") },
new object[] { XmlSchema.InstanceNamespace });
FieldBuilder schemalocationfieldbuilder = typebuilder.DefineField("SchemaLocation", typeof(string), FieldAttributes.Public);
schemalocationfieldbuilder.SetCustomAttribute(attributebuilder);
return typebuilder.CreateType();
}
catch (Exception exception)
{
throw new ApplicationException("Unable to create XML message type", exception);
}
}
Poniższy kod użyłem do utworzenia obiektu
Type type = WMQXMLMessageTypeFactory.CreateMessageType<TenantRequest>();
MetaData metadata = new MetaData();
metadata.ID = Guid.NewGuid().ToString();
metadata.Created = DateTime.Now;
metadata.Application = new schemasdev.local.tenant.Application();
metadata.Application.Name = "Publish Tenant";
metadata.Application.Core = ApplicationCore.PropertySystem;
NewOperation newoperation = new NewOperation();
newoperation.Tenant = new Tenant();
newoperation.Tenant.Code = "001";
newoperation.Tenant.Name = "Mister X";
object request = type.GetConstructor(new Type[0]).Invoke(new object[0]);
(request as TenantRequest).MetaData = metadata;
(request as TenantRequest).New = newoperation;
//Setting the schema location property
type.InvokeMember("SchemaLocation", System.Reflection.BindingFlags.SetField, null, request, new object[] { "http://schemasdev.local/2012-01/Tenant/1.0/Tenant.xsd" });
System.Xml.Serialization.XmlSerializer serializer = new System.Xml.Serialization.XmlSerializer(type);
stream = new System.IO.MemoryStream();
serializer.Serialize(stream, request);
Console.WriteLine(UTF8Encoding.UTF8.GetString(stream.ToArray()));
i ostatecznie idealnym wyjściowego:
<?xml version="1.0"?>
<TenantRequest xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xsi:schemaLocation="http://schemasdev.local/2012-01/Tenant/1.0/Tenant.xsd" xmlns="http://schemasdev.local/2012-01/Tenant/1.0">
<MetaData xmlns="http://schemasdev.local/2012-01/Messaging/1.0">
<ID>b59938fd-8e68-4927-87da-6d92c609f159</ID>
<Application>
<Name>Publish Tenant</Name>
<Core>PropertySystem</Core>
</Application>
<Created>2012-02-20T10:07:54.645424+01:00</Created>
</MetaData>
<New>
<Tenant>
<Code>001</Code>
<Name>Mister X</Name>
</Tenant>
</New>
</TenantRequest>
Doskonałe dzięki! –
Co by to ustawić w schemaLocation? Lokalizacja, z której XSD.EXE go użył, prawdopodobnie nie będzie dostępna w Internecie, gdzie użytkownik 'xsi: schemaLocation' musiałby go znaleźć. –
@John: Może istnieje opcja określenia wartości w pliku xsd? – dtb