Develop Reference

Converter file section is null

I'm making a BRRES to BFRES converter. For some reason, the MDL0 section seems to be always null when debugging. Here is the code for the Brres file loader:
/// <summary>
/// Represents a set of properties controlling the load of a <see cref="Brres.BrresFile"/>.
/// </summary>
internal class BrresLoaderContext
{
// ---- CONSTRUCTORS -------------------------------------------------------------------------------------------
/// <summary>
/// Initializes a new instance of the <see cref="BrresLoaderContext"/> class for the given <see cref="BrresFile"/>
/// instance using the given <see cref="BinaryDataReader"/>.
/// </summary>
/// <param name="BrresFile">The <see cref="BrresFile"/> instance to load the data in.</param>
/// <param name="reader">The <see cref="BinaryDataReader"/> to use for reading the data.</param>
internal BrresLoaderContext(BrresFile brresFile, BinaryDataReader reader)
{
BrresFile = brresFile;
Reader = reader;
Warnings = new List<string>();
}
// ---- PROPERTIES ---------------------------------------------------------------------------------------------
/// <summary>
/// Gets the <see cref="BrresFile"/> instance which is loaded to.
/// </summary>
internal BrresFile BrresFile
{
get;
private set;
}
/// <summary>
/// Gets the <see cref="BinaryDataReader"/> which is used to read data from the input stream.
/// </summary>
internal BinaryDataReader Reader
{
get;
private set;
}
/// <summary>
/// Gets or sets the warnings raised after loading the Brres file.
/// </summary>
internal List<string> Warnings
{
get;
private set;
}
}
I mostly didn't update comments.
So why is it null?

Nullable Types as Generics

I'm trying to create a linked list for my personal library that can handle EVERYTHING. I'm trying to write it so that it can 'equally' easily hand int, null,DateTime or Class and I wanted it to be easily extendable, so that if I wanted to quickly make stack out of it, I can just write push, pop, and peek methods and so forth.
Currently, my code looks like this. Note that I use 'Base' as my generic type.
namespace ClassLibrary1
{
public class LinkedList<Base> where Base : class
{
public class Node
{
private Node next;
private Node prev;
private Base value;
/// <summary>
/// Constructor for Nodes of Circular Linked List class.
/// Calls overloaded constructor for no previous or next provided.
/// O(1)
/// </summary>
/// <param name="value">The value to be stored. Can use tuple for associations</param>
public Node(Base value)
{
new Node(null, null, value);
}
/// <summary>
/// Constructor for nodes of Circular Linked List class.
/// O(1)
/// </summary>
/// <param name="prev">The previous node in the linked list</param>
/// <param name="next">The next node in the linked list</param>
/// <param name="value">The value to be stored</param>
public Node(Node prev, Node next, Base value)
{
this.prev = prev;
this.next = next;
this.value = value;
}
/// <summary>
/// Sets the 'next' attribute of the node to the passed value.
/// O(1)
/// Chainable
/// </summary>
/// <param name="next">The new value of the 'next' attribute.</param>
/// <returns>Chainable(Node, this)</returns>
public Node setNext(Node next)
{
this.next = next;
return this;
}
/// <summary>
/// Sets the 'prev' attribute of the node to the passed value
/// O(1)
/// Chainable
/// </summary>
/// <param name="prev">The new value of the 'prev' attribute to denote the previous node</param>
/// <returns>Chainable(Node, this)</returns>
public Node setPrev(Node prev)
{
this.prev = prev;
return this;
}
/// <summary>
/// Changes the stored value of type Base to the passed value.
/// O(1)
/// Chainable
/// </summary>
/// <param name="value">The new value to be stored with the node</param>
/// <returns>Chainable(Node, this)</returns>
public Node setVal(Base value)
{
this.value = value;
return this;
}
/// <summary>
/// Returns the next node in the linked list.
/// O(1)
/// </summary>
/// <returns>The next node in the linked list.(Node)</returns>
public Node getNext()
{
return this.next;
}
/// <summary>
/// Returns the previous node in the linked list.
/// O(1)
/// </summary>
/// <returns>The previous node in the linked list.(Node)</returns>
public Node getPrev()
{
return this.prev;
}
/// <summary>
/// Returns the value stored at this node.
/// O(1)
/// </summary>
/// <returns>The value stored at this node.(Base)</returns>
public Base getVal()
{
return this.value;
}
}
public Node head;
public bool duplicates;
public bool hasNullValues;
public bool throwNullError;
/// <summary>
/// Constructor for the LinkedList. Creates a null head node.
/// Duplication defaulted to false
/// O(1)
/// </summary>
public LinkedList()
{
this.head = new Node(null);
this.head.setNext(this.head).setPrev(this.head);
this.duplicates = false;
this.hasNullValues = false;
this.throwNullError = false;
}
/// <summary>
/// Allows duplication for the linked list.
/// O(1)
/// Chainable attribute.
/// </summary>
/// <returns>Chainable.(LinkedList<Base>, this)</returns>
public LinkedList<Base> hasDuplicates()
{
this.duplicates = true;
return this;
}
/// <summary>
/// Allows the structure to store null values in nodes.
/// O(1)
/// Chainable.
/// </summary>
/// <returns>Chainable.(LinkedList<Base>, this)</returns>
public LinkedList<Base> hasNulls()
{
this.hasNullValues = true;
return this;
}
/// <summary>
/// Causes the structure to throw a null error when a null value is inserted.
/// If hasNulls is off, turns it on.
/// O(1)
/// Chainable.
/// </summary>
/// <returns>Chainable.(LinkedList<Base>, this)</returns>
public LinkedList<Base> throwsNulls()
{
if (!this.hasNullValues)
{
this.hasNullValues = true;
}
this.throwNullError = true;
return this;
}
/// <summary>
/// Iff duplicates not allowed, searches for value in list. Throws error if duplicate found.
/// Creates a new node at the end of the list, then links it to the head node.
/// O(length) [if hasDuplicates()]
/// O(1) [if else]
/// Chainable
/// </summary>
/// <param name="value">Value stored at the new node in the list</param>
/// <returns>Chainable.(LinkedList<Base>, this)</returns>
public LinkedList<Base> add(Base value)
{
if (!duplicates)
{
if (search(value) != null)
{
throw new Exception("Value already exists in the linked list.");
}
}
if (!this.hasNullValues && value != null)
{
if (this.throwNullError)
{
throw new Exception("Cannot insert null values");
}
else
{
return this;
}
}
Node newNode = new Node(value);
this.head.getPrev().setNext(newNode);
this.head.setPrev(newNode);
return this;
}
/// <summary>
/// Iterates through the list until first such node for with a matching value is found.
/// Returns null if no matches found.
/// Use searchAll to find duplicates.
/// O(length)
/// </summary>
/// <param name="value">The value to be searched for.</param>
/// <returns>First node with the desired value(Node?)</returns>
public Node search(Base value)
{
Node temp = this.head.getNext();
while (!temp.getVal().Equals(value))
{
if (temp.Equals(this.head))
{
return null;
}
temp = temp.getNext();
}
return temp;
}
/// <summary>
/// If value doesn't exist in the list, throws an exception.
/// Deletes the first node found with the chosen value.
/// Use DeleteAll to delete all instances.
/// Chainable.
/// O(length)
/// </summary>
/// <param name="value">Value to be removed from the list.</param>
/// <returns>Chainable.(LinkedList<Base>, this)</returns>
public LinkedList<Base> delete(Base value)
{
try{
return delete(search(value));
}
catch(Exception e){
throw new Exception("Node to be deleted not found");
}
}
/// <summary>
/// Removes all pointers to the passed node.
/// O(1)
/// </summary>
/// <param name="tbd">The node to be deleted.</param>
/// <returns>Chainable.(LinkedList<Base>, this)</returns>
public LinkedList<Base> delete(Node tbd)
{
if (tbd.Equals(this.head))
{
throw new Exception("Cannot delete head node");
}
else
{
tbd.getPrev().setNext(tbd.getNext());
tbd.getNext().setPrev(tbd.getPrev());
}
return this;
}
/// <summary>
/// Returns a LinkedList of all nodes containing the desired value.
/// O(length)
/// </summary>
/// <param name="value">The value to be found.</param>
/// <returns>A LinkedList of Nodes with matching values.(LinkedList<Node>)</returns>
public LinkedList<Node> searchAll(Base value)
{
LinkedList<Node> returnList = new LinkedList<Node>();
Node temp = this.head.getNext();
while (!temp.Equals(this.head))
{
if (temp.getVal().Equals(value))
{
returnList.add(temp);
}
temp = temp.getNext();
}
return returnList;
}
/// <summary>
/// Returns the first Node in the Linked List.
/// O()
/// </summary>
/// <returns>First non-head node in the list.(Node)</returns>
public Node firstOrDefault()
{
return this.head.getNext();
}
/// <summary>
/// Returns the value of the first node in the list.
/// O(1)
/// </summary>
/// <returns>FIrst non-head </returns>
public Base firstVal()
{
return this.head.getNext().getVal();
}
/// <summary>
/// Gets the last node in the linked list.
/// O(1)
/// </summary>
/// <returns>The last node in the linked list.(Node)</returns>
public Node tail()
{
return this.head.getPrev();
}
/// <summary>
/// Returns the value of the last node in the linked list.
/// O(1)
/// </summary>
/// <returns>VThe value of the tail node.(Base)</returns>
public Base tailVal()
{
return this.head.getPrev().getVal();
}
public static void Main()
{
LinkedLis t<Int32> mine = new LinkedList<Int32>();
}
}
}
However, it gives Red Text under the Int32, saying "The type 'int' must be a reference type in order to use it as a parameter 'Base' in the generic type or method ---this---.
Tell me if you would like me to remove the comments, I'm not sure if that makes it harder or easier to solve.

Because you declared a constraint on a Base type to be a class (a reference type):
public class LinkedList<Base> where Base : class
It exactly forbids using Int32, because it's a value type and is different from a required reference type.
new LinkedList<Int32>()
So, to fix this particular problem, you would need to to create a wrapper class for your integer values.
Before you do this though, check your intentions to store any type in your linked list. Doing so you will strip you off all advantages of C# as a strongly typed language.
And as it was mentioned before, unless you write this code as a pure academic exercise, you should use an existing .NET LinkedList and possibly extend/inherit it, if you need more functionality.
Update: I assumed it went without saying, but to make it crystal clear don't forget that Nullable is a struct, not a class, so you cannot use "cheats" like int?.

Required validation attribute and custom validators order

I have 3 entities.
Let's say I have Event entity, and 2 "derived" entities: Accident, Repair.
They provide some additional fields over Event entity.
Event have StartDate and EndDate which are always required so I mark them with [Required] attribute. That's ok. But I have some additional validation logic that checks if the Event is Repair, then some other Event fields are also required. For this I provide custom validator.
The problem is that the properties marked with [Required] attribute are always checked before other validators.
What I want achieve:
If Event is Accident I want to make Event.SomeField required.
Validation summary should show now contain 3 validation errors at the very first validation attempt.
How it behaves now:
If Event is Accident first validation attempt shows 2 errors of 2 properties marked as [Required]. Only after I fill those, on the next validation attempt fires my custom validator which also states that 3rd Event.SomeField is also required.
I want all the required fields to validate at the same time.
Is this possible? How to achieve this?

For the case that a property is required based on a certain condition, i use a custom attribute, that was initially provided by Jeff Handley in his blog.
Here´s the code of the Attribute:
[AttributeUsage(AttributeTargets.Property | AttributeTargets.Field | AttributeTargets.Parameter, AllowMultiple = true)]
public class ConditionallyRequiredAttribute : RequiredAttribute {
private MemberInfo _member;
/// <summary>
/// The name of the member that will return the state that indicates
/// whether or not the validated member is required.
/// </summary>
public string ConditionMember { get; private set; }
/// <summary>
/// The condition value under which this validator treats
/// the affected member as required.
/// </summary>
public object RequiredCondition { get; private set; }
/// <summary>
/// Comma-separated list of additional members to
/// add to validation errors. By default, the
/// <see cref="ConditionMember"/> is added.
/// </summary>
public string ErrorMembers { get; set; }
/// <summary>
/// Conditionally require a value, only when the specified
/// <paramref name="conditionMember"/> is <c>true</c>.
/// </summary>
/// <param name="conditionMember">
/// The member that must be <c>true</c> to require a value.
/// </param>
public ConditionallyRequiredAttribute(string conditionMember)
: this(conditionMember, true) { }
/// <summary>
/// Conditionally require a value, only when the specified
/// <paramref name="conditionMember"/> has a value that
/// exactly matches the <paramref name="requiredCondition"/>.
/// </summary>
/// <param name="conditionMember">
/// The member that will be evaluated to require a value.
/// </param>
/// <param name="requiredCondition">
/// The value the <paramref name="conditionMember"/> must
/// hold to require a value.
/// </param>
public ConditionallyRequiredAttribute(string conditionMember, object requiredCondition) {
this.ConditionMember = conditionMember;
this.RequiredCondition = requiredCondition;
this.ErrorMembers = this.ConditionMember;
}
/// <summary>
/// Override the base validation to only perform validation when the required
/// condition has been met. In the case of validation failure, augment the
/// validation result with the <see cref="ErrorMembers"/> as an additional
/// member names, as needed.
/// </summary>
/// <param name="value">The value being validated.</param>
/// <param name="validationContext">The validation context being used.</param>
/// <returns>
/// <see cref="ValidationResult.Success"/> if not currently required or if satisfied,
/// or a <see cref="ValidationResult"/> in the case of failure.
/// </returns>
protected override ValidationResult IsValid(object value, ValidationContext validationContext) {
if (this.DiscoverMember(validationContext.ObjectType)) {
object state = this.InvokeMember(validationContext.ObjectInstance);
// We are only required if the current state
// matches the specified condition.
if (Object.Equals(state, this.RequiredCondition)) {
ValidationResult result = base.IsValid(value, validationContext);
if (result != ValidationResult.Success && this.ErrorMembers != null && this.ErrorMembers.Any()) {
result = new ValidationResult(result.ErrorMessage,
result.MemberNames.Union(this.ErrorMembers.Split(',').Select(s => s.Trim())));
}
return result;
}
return ValidationResult.Success;
}
throw new InvalidOperationException(
"ConditionallyRequiredAttribute could not discover member: " + this.ConditionMember);
}
/// <summary>
/// Discover the member that we will evaluate for checking our condition.
/// </summary>
/// <param name="objectType"></param>
/// <returns></returns>
private bool DiscoverMember(Type objectType) {
if (this._member == null) {
this._member = (from member in objectType.GetMember(this.ConditionMember).Cast<MemberInfo>()
where IsSupportedProperty(member) || IsSupportedMethod(member)
select member).SingleOrDefault();
}
// If we didn't find 1 exact match, indicate that we could not discover the member
return this._member != null;
}
/// <summary>
/// Determine if a <paramref name="member"/> is a
/// method that accepts no parameters.
/// </summary>
/// <param name="member">The member to check.</param>
/// <returns>
/// <c>true</c> if the member is a parameterless method.
/// Otherwise, <c>false</c>.
/// </returns>
private bool IsSupportedMethod(MemberInfo member) {
if (member.MemberType != MemberTypes.Method) {
return false;
}
MethodInfo method = (MethodInfo)member;
return method.GetParameters().Length == 0
&& method.GetGenericArguments().Length == 0
&& method.ReturnType != typeof(void);
}
/// <summary>
/// Determine if a <paramref name="member"/> is a
/// property that has no indexer.
/// </summary>
/// <param name="member">The member to check.</param>
/// <returns>
/// <c>true</c> if the member is a non-indexed property.
/// Otherwise, <c>false</c>.
/// </returns>
private bool IsSupportedProperty(MemberInfo member) {
if (member.MemberType != MemberTypes.Property) {
return false;
}
PropertyInfo property = (PropertyInfo)member;
return property.GetIndexParameters().Length == 0;
}
/// <summary>
/// Invoke the member and return its value.
/// </summary>
/// <param name="objectInstance">The object to invoke against.</param>
/// <returns>The member's return value.</returns>
private object InvokeMember(object objectInstance) {
if (this._member.MemberType == MemberTypes.Method) {
MethodInfo method = (MethodInfo)this._member;
return method.Invoke(objectInstance, null);
}
PropertyInfo property = (PropertyInfo)this._member;
return property.GetValue(objectInstance, null);
}
#if !SILVERLIGHT
/// <summary>
/// The desktop framework has this property and it must be
/// overridden when allowing multiple attributes, so that
/// attribute instances can be disambiguated based on
/// field values.
/// </summary>
public override object TypeId {
get { return this; }
}
#endif
}
Here´s an example:
public class Dummy{
public bool IsCondition {get; set;}
[ConditionallyRequired("IsCondition", true)]
public string SometimesRequired {get; set;}
}

Creating dynamic keyvalue pairs within a config section

I'm writing a class to describe a config section and I'm looking for a possible method to cater to the following scenario:
<plugins>
<add name="resize" maxheight="500px" maxwidth="500px"/>
<add name="watermark" font="arial"/>
</plugins>
Where each item in the list can contain different properties as well as the required name property. Setting up the default section is simple enough but I'm now stuck as how to add the dynamic key/value pairs. Any ideas?
/// <summary>
/// Represents a PluginElementCollection collection configuration element
/// within the configuration.
/// </summary>
public class PluginElementCollection : ConfigurationElementCollection
{
/// <summary>
/// Represents a PluginConfig configuration element within the
/// configuration.
/// </summary>
public class PluginElement : ConfigurationElement
{
/// <summary>
/// Gets or sets the token of the plugin file.
/// </summary>
/// <value>The name of the plugin.</value>
[ConfigurationProperty("name", DefaultValue = "", IsRequired = true)]
public string Name
{
get { return (string)this["name"]; }
set { this["name"] = value; }
}
// TODO: What goes here to create a series of dynamic
// key/value pairs.
}
/// <summary>
/// Creates a new PluginConfig configuration element.
/// </summary>
/// <returns>
/// A new PluginConfig configuration element.
/// </returns>
protected override ConfigurationElement CreateNewElement()
{
return new PluginElement();
}
/// <summary>
/// Gets the element key for a specified PluginElement
/// configuration element.
/// </summary>
/// <param name="element">
/// The <see cref="T:System.Configuration.ConfigurationElement"/>
/// to return the key for.
/// </param>
/// <returns>
/// The element key for a specified PluginElement configuration element.
/// </returns>
protected override object GetElementKey(ConfigurationElement element)
{
return ((PluginElement)element).Name;
}
}

In your ConfigurationElement you can override OnDeserializeUnrecognizedAttribute() and then store the extra attributes somewhere, in a Dictionary for example:
public class PluginElement : ConfigurationElement
{
public IDictionary<string, string> Attributes { get; private set; }
public PluginElement ()
{
Attributes = new Dictionary<string, string>();
}
protected override bool OnDeserializeUnrecognizedAttribute(string name, string value)
{
Attributes.Add(name, value);
return true;
}
}
Returning true from OnDeserializeUnrecognizedAttribute indicates that you've handled the unrecongnized attribute, and prevents the ConfigurationElement base class from throwing an exception, which it normally does when you haven't declared a [ConfigurationProperty] for every attribute in the config xml.

WCF Known Type from System.Object in Config

I'm trying to specify a known type in my config, but I'm having problems with the fact that it derives from Object. I can make it work specifying the known type via attribute. But in this case I need to make it work from the config.
Here's an example. The following works fine:
[ServiceContract]
[ServiceKnownType(typeof(MyData))]
public interface IContract
{
[OperationContract]
void Send(object data);
}
[DataContract]
public class MyData
{
[DataMember]
public string Message { get; set; }
}
But if I remove the ServiceKnownType attribute and put the following in the config:
<system.runtime.serialization>
<dataContractSerializer>
<declaredTypes>
<add type="System.Object, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
<knownType type="WpfApplication1.MyData, WpfApplication1, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null"/>
</add>
</declaredTypes>
</dataContractSerializer>
</system.runtime.serialization>
I get a ConfigurationErrorsException with the message "The value for the property 'type' is not valid. The error is: The type System.Object cannot be used as a declared type in config."
Is there anyway to make this work via config?

The answer turns out to be it's not possible to do what I want to do in the config file alone. The config above corresponds to the [KnownType] attribute used on DataContracts. There appears to be no way to implement [ServiceKnownType] in the config.
An alternate approach is to use [ServiceKnownType(methodName, type)] attribute with a custom configuration section. The new config looks like this:
<configuration>
<configSections>
<section
name="serviceKnownTypes"
type="WpfApplication1.ServiceKnownTypesSection, WpfApplication1, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null"/>
</configSections>
<serviceKnownTypes>
<declaredServices>
<serviceContract type="WpfApplication1.IContract, WpfApplication1, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null">
<knownTypes>
<knownType type="WpfApplication1.MyData, WpfApplication1, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null"/>
</knownTypes>
</serviceContract>
</declaredServices>
</serviceKnownTypes>
</configuration>
The contracts:
[ServiceContract]
[ServiceKnownType("GetServiceKnownTypes", typeof(KnownTypeHelper))]
public interface IContract
{
[OperationContract]
void Send(object data);
}
[DataContract]
public class MyData
{
[DataMember]
public string Message { get; set; }
}
The helper class that contains the callback that returns the list of known types
public static class KnownTypeHelper
{
public static IEnumerable<Type> GetServiceKnownTypes(ICustomAttributeProvider provider)
{
List<Type> result = new List<Type>();
ServiceKnownTypesSection serviceKnownTypes = (ServiceKnownTypesSection)ConfigurationManager.GetSection("serviceKnownTypes");
DeclaredServiceElement service = serviceKnownTypes.Services[((Type)(provider)).AssemblyQualifiedName];
foreach (ServiceKnownTypeElement knownType in service.KnownTypes)
{
result.Add(knownType.Type);
}
return result;
}
}
Information on creating custom config sections can be found here:
http://msdn.microsoft.com/en-us/library/2tw134k3.aspx
http://msdn.microsoft.com/en-us/library/system.configuration.configurationcollectionattribute.aspx

I'm not sure if it is by design, but the KnownTypeHelper below won't throw an error if you've not declared a service contract with known types. (i.e. its optional to add known types to service contracts).
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Reflection;
/// <summary>
/// Helper for finding the known types for Wcf Services from a configuration file.
/// </summary>
public static class KnownTypeHelper
{
/// <summary>
/// Gets the known types for the service from a configuration file.
/// </summary>
/// <param name="provider">
/// The provider.
/// </param>
/// <returns>
/// The known types for the service from a configuration file.
/// </returns>
public static IEnumerable<Type> GetServiceKnownTypes(ICustomAttributeProvider provider)
{
var result = new List<Type>();
var serviceKnownTypes = (ServiceKnownTypesSection)ConfigurationManager.GetSection("serviceKnownTypes");
if (serviceKnownTypes != null)
{
var service = serviceKnownTypes.Services[((Type)provider).AssemblyQualifiedName];
if (service != null)
{
foreach (ServiceKnownTypeElement knownType in service.KnownTypes)
{
result.Add(knownType.Type);
}
}
}
return result;
}
}
To save someone else the trouble of creating the configuration classes,
Note: There is no validation of the assembly qualified type names. If someone wants to add the appropiate attributes to do this, please do.
using System.Configuration;
/// <summary>
/// Section for configuration known types for services.
/// </summary>
public class ServiceKnownTypesSection : ConfigurationSection
{
/// <summary>
/// Gets services.
/// </summary>
[ConfigurationProperty("declaredServices", IsDefaultCollection = false)]
[ConfigurationCollection(typeof(DeclaredServiceElement), AddItemName = "serviceContract", CollectionType = ConfigurationElementCollectionType.AddRemoveClearMap)]
public DeclaredServiceElementCollection Services
{
get
{
return (DeclaredServiceElementCollection)base["declaredServices"];
}
}
}
/// <summary>
/// Collection of declared service elements.
/// </summary>
public class DeclaredServiceElementCollection : ConfigurationElementCollection
{
/// <summary>
/// Gets the service for which known types have been declared for.
/// </summary>
/// <param name="key">
/// The key of the service.
/// </param>
public new DeclaredServiceElement this[string key]
{
get
{
return (DeclaredServiceElement)BaseGet(key);
}
set
{
var element = BaseGet(key);
var index = this.BaseIndexOf(element);
if (BaseGet(index) != null)
{
BaseRemoveAt(index);
}
BaseAdd(index, value);
}
}
/// <summary>
/// When overridden in a derived class, creates a new <see cref="T:System.Configuration.ConfigurationElement"/>.
/// </summary>
/// <returns>
/// A new <see cref="T:System.Configuration.ConfigurationElement"/>.
/// </returns>
protected override ConfigurationElement CreateNewElement()
{
return new DeclaredServiceElement();
}
/// <summary>
/// Gets the element key for a specified configuration element when overridden in a derived class.
/// </summary>
/// <returns>
/// An <see cref="T:System.Object"/> that acts as the key for the specified <see cref="T:System.Configuration.ConfigurationElement"/>.
/// </returns>
/// <param name="element">
/// The <see cref="T:System.Configuration.ConfigurationElement"/> to return the key for.
/// </param>
protected override object GetElementKey(ConfigurationElement element)
{
return ((DeclaredServiceElement)element).Type;
}
}
/// <summary>
/// The service for which known types are being declared for.
/// </summary>
public class DeclaredServiceElement : ConfigurationElement
{
/// <summary>
/// Gets or sets Type.
/// </summary>
[ConfigurationProperty("type", IsRequired = true, IsKey = true)]
public string Type
{
get
{
return (string) this["type"];
}
set
{
this["type"] = value;
}
}
/// <summary>
/// Gets KnownTypes.
/// </summary>
[ConfigurationProperty("knownTypes", IsDefaultCollection = false)]
[ConfigurationCollection(typeof(DeclaredServiceElement), AddItemName = "knownType", CollectionType = ConfigurationElementCollectionType.AddRemoveClearMap)]
public ServiceKnownTypeElementCollection KnownTypes
{
get
{
return (ServiceKnownTypeElementCollection)base["knownTypes"];
}
}
}
/// <summary>
/// A collection of known type elements.
/// </summary>
public class ServiceKnownTypeElementCollection : ConfigurationElementCollection
{
/// <summary>
/// Gets an known type with the specified key.
/// </summary>
/// <param name="key">
/// The key of the known type.
/// </param>
public new ServiceKnownTypeElement this[string key]
{
get
{
return (ServiceKnownTypeElement)BaseGet(key);
}
set
{
var element = BaseGet(key);
var index = this.BaseIndexOf(element);
if (BaseGet(index) != null)
{
BaseRemoveAt(index);
}
BaseAdd(index, value);
}
}
/// <summary>
/// When overridden in a derived class, creates a new <see cref="T:System.Configuration.ConfigurationElement"/>.
/// </summary>
/// <returns>
/// A new <see cref="T:System.Configuration.ConfigurationElement"/>.
/// </returns>
protected override ConfigurationElement CreateNewElement()
{
return new ServiceKnownTypeElement();
}
/// <summary>
/// Gets the element key for a specified configuration element when overridden in a derived class.
/// </summary>
/// <returns>
/// An <see cref="T:System.Object"/> that acts as the key for the specified <see cref="T:System.Configuration.ConfigurationElement"/>.
/// </returns>
/// <param name="element">
/// The <see cref="T:System.Configuration.ConfigurationElement"/> to return the key for.
/// </param>
protected override object GetElementKey(ConfigurationElement element)
{
return ((ServiceKnownTypeElement)element).Type;
}
}
/// <summary>
/// Configuration element for a known type to associate with a service.
/// </summary>
public class ServiceKnownTypeElement : ConfigurationElement
{
/// <summary>
/// Gets or sets TypeString.
/// </summary>
[ConfigurationProperty("type", IsRequired = true, IsKey = true)]
public string TypeString
{
get
{
return (string)this["type"];
}
set
{
this["type"] = value;
}
}
/// <summary>
/// Gets or sets Type.
/// </summary>
public Type Type
{
get
{
return Type.GetType(this.TypeString);
}
set
{
this["type"] = value.AssemblyQualifiedName;
}
}
}