ComUdtElement Class

 

Represents a User Defined Type (UDT) that is to be included in the service contract. This class cannot be inherited.

Namespace:   System.ServiceModel.Configuration
Assembly:  System.ServiceModel (in System.ServiceModel.dll)

System.Object
  System.Configuration.ConfigurationElement
    System.ServiceModel.Configuration.ComUdtElement

public sealed class ComUdtElement : ConfigurationElement

NameDescription
System_CAPS_pubmethodComUdtElement()

Initializes a new instance of the ComUdtElement class.

System_CAPS_pubmethodComUdtElement(String)

Initializes a new instance of the ComUdtElement class with the specified GUID string.

NameDescription
System_CAPS_pubpropertyCurrentConfiguration

Gets a reference to the top-level Configuration instance that represents the configuration hierarchy that the current ConfigurationElement instance belongs to.(Inherited from ConfigurationElement.)

System_CAPS_pubpropertyElementInformation

Gets an ElementInformation object that contains the non-customizable information and functionality of the ConfigurationElement object. (Inherited from ConfigurationElement.)

System_CAPS_protpropertyElementProperty

Gets the ConfigurationElementProperty object that represents the ConfigurationElement object itself.(Inherited from ConfigurationElement.)

System_CAPS_protpropertyItem[ConfigurationProperty]

Gets or sets a property or attribute of this configuration element.(Inherited from ConfigurationElement.)

System_CAPS_protpropertyItem[String]

Gets or sets a property, attribute, or child element of this configuration element.(Inherited from ConfigurationElement.)

System_CAPS_pubpropertyLockAllAttributesExcept

Gets the collection of locked attributes.(Inherited from ConfigurationElement.)

System_CAPS_pubpropertyLockAllElementsExcept

Gets the collection of locked elements.(Inherited from ConfigurationElement.)

System_CAPS_pubpropertyLockAttributes

Gets the collection of locked attributes (Inherited from ConfigurationElement.)

System_CAPS_pubpropertyLockElements

Gets the collection of locked elements.(Inherited from ConfigurationElement.)

System_CAPS_pubpropertyLockItem

Gets or sets a value indicating whether the element is locked.(Inherited from ConfigurationElement.)

System_CAPS_pubpropertyName

Gets or sets the readable type name.

System_CAPS_protpropertyProperties

Gets the collection of properties.(Inherited from ConfigurationElement.)

System_CAPS_pubpropertyTypeDefID

Gets or sets a GUID string that identifies the specific UDT type within the registered type library.

System_CAPS_pubpropertyTypeLibID

Gets or sets a GUID string that identifies the registered type library that defines the type.

System_CAPS_pubpropertyTypeLibVersion

Gets or sets a string that identifies the type library version that defines the type.

NameDescription
System_CAPS_protmethodDeserializeElement(XmlReader, Boolean)

Reads XML from the configuration file.(Inherited from ConfigurationElement.)

System_CAPS_pubmethodEquals(Object)

Compares the current ConfigurationElement instance to the specified object.(Inherited from ConfigurationElement.)

System_CAPS_pubmethodGetHashCode()

Gets a unique value representing the current ConfigurationElement instance.(Inherited from ConfigurationElement.)

System_CAPS_pubmethodGetType()

Gets the Type of the current instance.(Inherited from Object.)

System_CAPS_protmethodInit()

Sets the ConfigurationElement object to its initial state.(Inherited from ConfigurationElement.)

System_CAPS_protmethodInitializeDefault()

Used to initialize a default set of values for the ConfigurationElement object.(Inherited from ConfigurationElement.)

System_CAPS_protmethodIsModified()

Indicates whether this configuration element has been modified since it was last saved or loaded, when implemented in a derived class.(Inherited from ConfigurationElement.)

System_CAPS_pubmethodIsReadOnly()

Gets a value indicating whether the ConfigurationElement object is read-only.(Inherited from ConfigurationElement.)

System_CAPS_protmethodReset(ConfigurationElement)

Resets the internal state of the ConfigurationElement object, including the locks and the properties collections.(Inherited from ConfigurationElement.)

System_CAPS_protmethodResetModified()

Resets the value of the IsModified method to false when implemented in a derived class.(Inherited from ConfigurationElement.)

System_CAPS_protmethodSerializeElement(XmlWriter, Boolean)

Writes the contents of this configuration element to the configuration file when implemented in a derived class.(Inherited from ConfigurationElement.)

System_CAPS_protmethodSerializeToXmlElement(XmlWriter, String)

Writes the outer tags of this configuration element to the configuration file when implemented in a derived class.(Inherited from ConfigurationElement.)

System_CAPS_protmethodSetReadOnly()

Sets the IsReadOnly property for the ConfigurationElement object and all subelements.(Inherited from ConfigurationElement.)

System_CAPS_pubmethodToString()

Returns a string that represents the current object.(Inherited from Object.)

System_CAPS_protmethodUnmerge(ConfigurationElement, ConfigurationElement, ConfigurationSaveMode)

Modifies the ConfigurationElement object to remove all values that should not be saved. (Inherited from ConfigurationElement.)

The COM+ integration runtime creates services by inspecting the type library. When a COM+ component contains methods that pass a VARIANT, the system cannot determine the actual types to be passed prior to runtime. Therefore, when you attempt to pass a User Defined Type (UDT) within a VARIANT, it fails because it is not a known type for serialization.

To circumvent this problem, you can add the UDTs to the configuration file so that they can be included as known types on the appropriate service contract. In order to do so, you have to uniquely identify the UDT and the contract(s), that is, the original COM interface(s) that uses it.

The following example demonstrates adding two specific UDTs to the <userDefinedTypes> section of the configuration file for this purpose.

The attributes of the <userDefinedType> element are defined as follows:

  • typeName: an optional attribute that provides the readable type name. This is not used by the runtime but helps a reader to distinguish the types.

  • typeLibID: a GUID string that specifies the registered type library that defines the type.

  • typeLibVersion: a string that specifies the type library version that defines the type.

  • typeDefID: a GUID string that specifies the specific UDT type within the registered type library.

When the service is initialized, the COM+ integration runtime looks up the specified types and adds them to the known types collection for the specified contracts.

The following example demonstrates adding two specific UDTs to the <userDefinedTypes> section of the configuration file for this purpose.

.NET Framework
Available since 3.0

Any public static ( Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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