C # examples of delegation in advanced programming.

Using system;

Using system. Collections. Generic;

Using system. LINQ;

Using system. text;

 

Namespace consoleapplication1

{

Public class currency

{

Public uint dollars;

Public ushort cents;

 

Public currency ()

{

 

}

Public currency (uint dollars, ushort cents)

{

This. Dollars = dollars;

This. cents = cents;

 

}

Public override string tostring ()

{

Return string. Format ("{0: c}. {1,-2: 00}", dollars, cents );

}

Public static string getcurrencyuint ()

{

Return "RMB ";

}

Public static explicit operator currency (float value)

{

Checked

{

Uint dollars = (uint) value;

Ushort cents = (ushort) (value-dollars) * 100 );

Return new currency (dollars, cents );

}

}

Public Static Implicit operator float (currency value)

{

Return Value. dollars + value. cents/100366f;

 

}

Public Static Implicit operator currency (uint value)

{

Return new currency (value, 0 );

}

Public Static Implicit operator uint (currency value)

{

Return Value. dollars;

}

}

Delegate string getastring ();

Class Program

{

Static void main (string [] ARGs)

{

Int x = 40;

Getastring firststringmethod = x. tostring;

Console. writeline ("string is {0}", firststringmethod ());

 

Currency balance = new currency (34, 50 );

 

Firststringmethod = balance. tostring;

 

Console. writeline ("string is {0}", firststringmethod ());

 

Firststringmethod = new getastring (currency. getcurrencyuint );

Console. writeline ("string is {0}", firststringmethod ());

}

}

}

 

//

/// * The following is the running result. String is 40 string is ￥34.50 string is RMB. Press any key to continue ...*/