C#隐藏控制台键盘输入的方法

本文实例讲述了C#隐藏控制台键盘输入的方法。分享给大家供大家参考。具体如下：

using System;
namespace RobvanderWoude
{
 class HideInput
 {
  static int Main( string[] args )
  {
   try
   {
    bool clearscreen = false;
    if ( args.Length > 1 )
    {
     return WriteError( "Too many command line arguments" );
    }
    if ( args.Length == 1 )
    {
     switch ( args[0].ToUpper( ) )
     {
      case "/C":
       clearscreen = true;
       break;
      case "/?":
       return WriteError( );
      default:
       return WriteError( "Invalid command line argument \"" + args[0] + "\"" );
     }
    }
    // Set console foreground color to background color to hide what's being typed
    ConsoleColor color = Console.ForegroundColor;
    Console.ForegroundColor = Console.BackgroundColor;
    // Read 1 line of input from the console
    string input = Console.ReadLine( );
    // Restore the original console foreground color
    Console.ForegroundColor = color;
    // Clear the screen id specified on the command line
    if ( clearscreen )
    {
     Console.Clear( );
    }
    // Display the input - which should be redirected for this program to be of any use
    Console.WriteLine( input );
    // Returncode 0 for success, or 1 if the input was empty or whitespace only
    if ( string.IsNullOrWhiteSpace( input ) )
    {
     return 1;
    }
    else
    {
     return 0;
    }
   }
   catch ( Exception e )
   {
    return WriteError( e.Message );
   }
  }
  public static int WriteError( string errorMessage = "" )
  {
   Console.ResetColor( );
   if ( string.IsNullOrEmpty( errorMessage ) == false )
   {
    Console.Error.WriteLine( );
    Console.ForegroundColor = ConsoleColor.Red;
    Console.Error.Write( "ERROR: " );
    Console.ForegroundColor = ConsoleColor.White;
    Console.Error.WriteLine( errorMessage );
    Console.ResetColor( );
   }
   Console.Error.WriteLine( );
   Console.Error.WriteLine( "HideInput, Version 1.10" );
   Console.Error.WriteLine( "Batch utility to read 1 line of input while hiding what's being typed, by" );
   Console.Error.WriteLine( "temporarily setting the console foreground color equal to its background color" );
   Console.Error.WriteLine( );
   Console.Error.Write( "Usage: FOR /F \"tokens=*\" %%A IN ('" );
   Console.ForegroundColor = ConsoleColor.White;
   Console.Error.Write( "HIDEINPUT" );
   Console.ResetColor( );
   Console.Error.WriteLine( "') DO SET password=%%A" );
   Console.Error.Write( "  or: FOR /F \"tokens=*\" %%A IN ('" );
   Console.ForegroundColor = ConsoleColor.White;
   Console.Error.Write( "HIDEINPUT /C" );
   Console.ResetColor( );
   Console.Error.WriteLine( "') DO SET password=%%A" );
   Console.Error.WriteLine( );
   Console.Error.Write( "Where: " );
   Console.ForegroundColor = ConsoleColor.White;
   Console.Error.Write( "/C" );
   Console.ResetColor( );
   Console.Error.WriteLine( " clears the screen to remove what's typed from the screen buffer" );
   Console.Error.WriteLine( );
   Console.Error.WriteLine( "Written by Rob van der Woude" );
   return 1;
  }
 }
}

希望本文所述对大家的C#程序设计有所帮助。

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