Demonstrates a simple form of a delegate : delegate « Language Basics « C# / C Sharp

Home
C# / C Sharp
1.2D Graphics
2.Class Interface
3.Collections Data Structure
4.Components
5.Data Types
6.Database ADO.net
7.Date Time
8.Design Patterns
9.Development Class
10.Event
11.File Stream
12.Generics
13.GUI Windows Form
14.Internationalization I18N
15.Language Basics
16.LINQ
17.Network
18.Office
19.Reflection
20.Regular Expressions
21.Security
22.Services Event
23.Thread
24.Web Services
25.Windows
26.Windows Presentation Foundation
27.XML
28.XML LINQ
C# / C Sharp » Language Basics » delegateScreenshots 
Demonstrates a simple form of a delegate
Demonstrates a simple form of a delegate


/*
C# Programming Tips & Techniques
by Charles Wright, Kris Jamsa

Publisher: Osborne/McGraw-Hill (December 28, 2001)
ISBN: 0072193794
*/
// SimpDlgt.cs -- Demonstrates a simple form of a delegate
//
//                Compile this program using the following command line:
//                    C:>csc SimpDlgt.cs
using System;

namespace nsDelegate
{
// Declare the delegate. This actually creates a new class definition.
    delegate double MathOp (double value);

    public class SimpDlgt
    {
        static public void Main ()
        {
// Declare an object of the delegate type.
            MathOp DoMath;
// Create the delgate object using a method name.
            DoMath = new MathOp (GetSquare);
// Execute the delegate. This actually calls the Invoke() method.
            double result = DoMath (3.14159);
// Show the result.
            Console.WriteLine (result);
// Assign another method to the delegate object
            DoMath = new MathOp (GetSquareRoot);
// Call the delegate again.
            result = DoMath (3.14159);
// Show the result.
            Console.WriteLine (result);
        }
// Return the square of the argument.
        static double GetSquare (double val)
        {
            return (val * val);
        }
// Return the square root of the argument.
        static double GetSquareRoot (double val)
        {
            return (Math.Sqrt (val));
        }
    }
}
 



           
       
Related examples in the same category
1.Define your own delegateDefine your own delegate
2.Late Binding Delegates: A delegate is a repository of type-safe function pointers.
3.illustrates the use of a delegate 2illustrates the use of a delegate 2
4.illustrates the use of a multicast delegateillustrates the use of a multicast delegate
5.illustrates the use of a delegate that calls object methodsillustrates the use of a delegate that calls object methods
6.Demonstrates combining and removing delegates to create new delegatesDemonstrates combining and removing delegates to create new delegates
7.Demonstrate getting and printing the invocation list for a delegateDemonstrate getting and printing the invocation list for a delegate
8.Demonstrates adding multiple methods to a delegateDemonstrates adding multiple methods to a delegate
9.Using a delegate with a container class to sort the collection and return a sorted array using different sort criteriaUsing a delegate with a container class 
       to sort the collection and return a sorted array using different 
       sort criteria
10.Demonstrate using a static delegate without declaring an instance of the classDemonstrate using a static delegate without declaring an instance of the class
11.A simple delegate exampleA simple delegate example
12.Delegates can refer to instance methods, tooDelegates can refer to instance methods, too
13.Two delegates
14.The minimum implementation of a delegateThe minimum implementation of a delegate
15.Delegates:Using Delegates
16.Delegates to Instance MembersDelegates to Instance Members
17.Delegates:MulticastingDelegates:Multicasting
18.Arrays of Delegates
19.To remove delegates from a multicast delegate, use the Remove method, the minus operator (-), or the -= assignment operator.
20.the syntax of the GetInvocationList method: delegate [] GetInvocationList()
21.The publisher/subscriber relationship is a one-to-many relationship.
22.Lifetime of outer variables is aligned with the delegate
23.Combining delegates Multiple delegates are combined using the Combine method, the plus operator (+), or the += assignment operator.
24.CreateDelegate and DynamicInvoke
java2s.com  | Contact Us | Privacy Policy
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.