Verification Code Generation 3: A four-character and digital verification code is randomly generated using the ascee code.

Using system;
Using system. Data;
Using system. configuration;
Using system. Web;
Using system. Web. Security;
Using system. Web. UI;
Using system. Web. UI. webcontrols;
Using system. Web. UI. webcontrols. webparts;
Using system. Web. UI. htmlcontrols;
Using system. text;

/// <Summary>
/// Summary of validatecode
/// </Summary>
Public class validatecode
{
Public validatecode ()
{
}

// A four-character string consisting of a Verification code is randomly generated using the ascee code.
Public String validatecode ()
{
//
Byte [] bytes = new byte [1, 100];
Random randobj = new random ();
Int code;
For (INT I = 0; I <4; I ++)
{
Code = randobj. Next (44,122 );
Bytes [I] = convert. tobyte (CODE );
}
Asciiencoding ASCII = new asciiencoding ();
String validatecode = ASCII. getstring (bytes, 0, 4 );
Return validatecode. tostring ();
}
}