A simple delegate example : delegate « Language Basics « C# / C Sharp

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C# / C Sharp » Language Basics » delegateScreenshots 
A simple delegate example
A simple delegate example

/*
C#: The Complete Reference 
by Herbert Schildt 

Publisher: Osborne/McGraw-Hill (March 8, 2002)
ISBN: 0072134852
*/


// A simple delegate example.  
  
using System; 
 
// Declare a delegate.  
delegate string strMod(string str)
 
public class DelegateTest 
  // Replaces spaces with hyphens. 
  static string replaceSpaces(string a) { 
    Console.WriteLine("Replaces spaces with hyphens.")
    return a.Replace(' ''-')
  }  
 
  // Remove spaces. 
  static string removeSpaces(string a) { 
    string temp = ""
    int i; 
 
    Console.WriteLine("Removing spaces.")
    for(i=0; i < a.Length; i++
      if(a[i!= ' 'temp += a[i]
 
    return temp; 
  }  
 
  // Reverse a string. 
  static string reverse(string a) { 
    string temp = ""
    int i, j; 
 
    Console.WriteLine("Reversing string.")
    for(j=0, i=a.Length-1; i >= 0; i--, j++
      temp += a[i]
 
    return temp; 
  
     
  public static void Main() {  
    // Construct a delegate. 
    strMod strOp = new strMod(replaceSpaces)
    string str; 
 
    // Call methods through the delegate. 
    str = strOp("This is a test.")
    Console.WriteLine("Resulting string: " + str)
    Console.WriteLine()
      
    strOp = new strMod(removeSpaces)
    str = strOp("This is a test.")
    Console.WriteLine("Resulting string: " + str)
    Console.WriteLine()
 
    strOp = new strMod(reverse)
    str = strOp("This is a test.")
    Console.WriteLine("Resulting string: " + str)
  
}


           
       
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