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POAttaching overrides to a C# class
primarykey
Id
5848745
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AcceptedAnswerId
5849522
AnswerCount
5
ClosedDate
CommentCount
11
CommunityOwnedDate
CreationDate
2011-05-01T13:42:45.547
FavoriteCount
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LastActivityDate
2011-05-01T16:01:07.387
LastEditDate
2011-05-01T14:08:34.333
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1
Score
2
ViewCount
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LastEditorDisplayName
text
Body
I have a class with functions: <pre><code>class MyClass { public List<Attachment> Attachments; public void A() { // Do something } public void B() { // Do something } } class AttachmentA : Attachment { public void A() { // Do something else RealA(); } } class AttachmentB : Attachment { public void B() { // Do something else // RealB(); // No need to call base function here } } </code></pre> I need in my code when I attach <code>AttachmentA</code> to <code>MyClass</code> that all the functions in <code>MyClass</code> that are also present in <code>AttachmentA</code> to be overridden by the functions in <code>AttachmentA</code> and also give access to the original functions in <code>MyClass</code>. For example, I create <code>MyClass</code> and then attach <code>AttachmentA</code> instance to it. calling <code>MyClass.A()</code> will actually call <code>AttachmentA.A()</code> and the <code>AttachmentA.RealA()</code> will call the base function that was overridden. I know this can be somehow done with something like using event handlers lists to handle overrides but is there an easy way to implement this? Edit: I have no problem with long code that uses reflection as long as its present once and doesn't have to be even mentioned in any of the functions - maybe only when attaching attachement. Edit: you wanted an example: <pre><code>class MyClass { public List<Attachment> Attachments; public MyClass() { Attachments = new List<Attachment>(); } public void Attach(Attachment attachment) { Attachments.Add(attachment); // Do some magic here } public void A() { Console.WriteLine("MyClass.A"); } public void B() { Console.WriteLine("MyClass.B"); } } class AttachmentA : Attachment { public void A() { Console.WriteLine("AttachmentA.A"); RealA(); } } class AttachmentB : Attachment { public void B() { Console.WriteLine("AttachmentB.B"); } } public class Program { public static void Main(string[] Args) { MyClass aaa = new MyClass(); aaa.A(); // should print MyClass.A aaa.B(); // should print MyClass.B aaa.Attach(new AttachmentA()); aaa.Attach(new AttachmentB()); aaa.A(); // should print AttachmentA.A <newline> MyClass.A aaa.B(); // should print AttachmentB.B } } </code></pre> Edit: What I want to achieve here is like unit with attributes( = attachments). When the unit get an attachment of <code>RandomSpeed</code>, <code>RandomSpeed</code> will override the unit's <code>GetSpeed</code> and return random value. when it will get an attachment of evasion, it will override that units <code>ReduceHP</code> function and sometimes based on random value will not call the base function. Edit: What will really solve this mess is to somehow use reflection to change virtual method tables, I'm gonna make a followup on a separate question. I keep this question here incase someone find a better way to do this.
Tags
<c#><override><aop>
Title
Attaching overrides to a C# class
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PostAcceptedAnswerId
1. PO
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1. PTQuestion
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1. USDani
UserOwnerUserId
1. USDani
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1. PO
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2. PO
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3. PO
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 POAttaching overrides to a C# class
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2. VO
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