Console App Question

Question

I want to ignore pressing enter key while taking inpur from user. i.e. user just enter a value either it is thousands( or double varible lenght digit) or hundreds program just identify,save the value in a variable and move on next line to proceed. basically it is a calculator app. and i wnat to ignore pressing enter key again and agin. could anyone please help me doing this?

Željko Perić · Answer

Hello umair mohsin Solution is very simple. Here is part of my program with class Move and method string GetPlayerMove(), that returns as result keyboard input from user. While user types in his move, program controls weather those letters are allowed to be typed in, and prevents more than five letters to be typed in. With some simple changes of code below, the above problem is solved. using System; namespace Linkage_CA { /// /// Description of PlayerMove. /// /// Controls input from keyboard. /// /// Takes player's move from the keyboard, /// preventing that entered word lenght /// is not greater than five letters, /// and that letters entered /// are only from the list of possible letters. /// /// public class Move { public string GetPlayerMove() { // // // const string possible_letters = "1234567ABCDEFGSKIPabcdefgskipRGBYrgby" ; string word = "" ; string letter = "" ; string player_move = "" ; int lenght = 0; int x = Console.CursorLeft; // current column cursor position int y = Console.CursorTop; // current row cursor position bool move_ok = false ; while ( move_ok == false ) { ConsoleKeyInfo key = new ConsoleKeyInfo(); while ( ( key.Key != ConsoleKey.Enter || lenght ( key.Key != ConsoleKey.Escape ) ) { key = Console.ReadKey(); if ( key.Key == ConsoleKey.Backspace || key.Key == ConsoleKey.Delete ) { lenght--; if ( lenght { lenght = 0; } word = word.Substring( 0, lenght ); Console.SetCursorPosition( x, y ); Console.Write( " " ); Console.SetCursorPosition( x, y ); Console.Write( word ); } else { letter = key.KeyChar.ToString(); if ( possible_letters.Contains( letter ) ) { lenght++; if ( lenght { word = word + letter; } else { lenght = 5; Console.SetCursorPosition( x, y ); Console.Write( " " ); Console.SetCursorPosition( x, y ); Console.Write( word ); } } else if ( !possible_letters.Contains( letter ) ) { Console.SetCursorPosition( x, y ); Console.Write( " " ); Console.SetCursorPosition( x, y ); Console.Write( word ); } } } // // If word lenght is four letters, // Check if the player typed in 'Skip' as move. // if ( key.Key == ConsoleKey.Enter ) { player_move = word.ToUpper(); if ( lenght==4 && player_move != "SKIP" ) { move_ok = false ; } else if ( lenght==4 && player_move == "SKIP" ) { move_ok = true ; } else { move_ok = true ; } } else if ( key.Key == ConsoleKey.Escape ) { // // If player has typed in 'Escape' key , // game ends and Bot wins game. // Player has surrendered the game. // player_move = "Escape" ; move_ok = true ; } } // // Return selected player move // return player_move; } } } // // Last revision Date 08.01.2013. Time 21:00 // // coments finished Or here is another one : private static int GetValue( int cursor_x , int cursor_y) { // // Description of GetValue(int cursor_x , int cursor_y). // // Controls input from keyboard on specified console position. // Gets word from keyboard , preventing that entered word length // is greater then two letters , and securing that letters entered // are only from the list of possible letters. // // // declaration of variables // const string possible_letters = "1234567890" ; // list of possible letters string word = "" ; // entered word from keyboard string letter = "" ; // last typed letter on keyboard int length = 0; // length of word int number = 0; // converted word to double value bool IsNumber = false ; // number relevance switch // // get new word from keyboard , // repeat until user has entered correct int value // while (IsNumber == false || number 20) { word = "" ; letter = "" ; length = 0; number = 0; Console.SetCursorPosition(cursor_x, cursor_y); Console.Write( " " ); Console.SetCursorPosition(cursor_x, cursor_y); // // get new letter from keyboard until pressed key is 'Enter' // if typed key is 'Delete' or 'Backspace' delete last letter from word // ConsoleKeyInfo key = new ConsoleKeyInfo(); while (key.Key != ConsoleKey.Enter) { key = Console.ReadKey(); if (key.Key == ConsoleKey.Backspace || key.Key == ConsoleKey.Delete) { length--; if (length { length = 0; } word = word.Substring(0, length); Console.SetCursorPosition(cursor_x, cursor_y); Console.Write( " " ); Console.SetCursorPosition(cursor_x, cursor_y); Console.Write(word); } else { letter = key.KeyChar.ToString(); if (possible_letters.Contains(letter )) { length++; if (length { word = word + letter; } else { length = 2; Console.SetCursorPosition(cursor_x, cursor_y); Console.Write( " " ); Console.SetCursorPosition(cursor_x, cursor_y); Console.Write(word); } } else if (!possible_letters.Contains( letter )) { Console.SetCursorPosition( cursor_x, cursor_y ); Console.Write( " " ); Console.SetCursorPosition( cursor_x, cursor_y ); Console.Write(word); } } } // // check does entered word represents positive int number greater then zero // if not , write error message and ask for new entry // IsNumber = int .TryParse(word.ToString(), out number); if (!IsNumber) { Console.Beep(); Console.SetCursorPosition(0,31 ); Console.WriteLine( " ?????? ??? ????? ???????? !" ); Console.WriteLine(); Console.Write( " ?????????? ???? ???? ?????? ?? ???????? ..." ); Console.ReadKey( true ); Console.SetCursorPosition(0,31); Console.WriteLine( " " ); Console.WriteLine( " " ); Console.WriteLine( " " ); } } // // return entered number // return number; } All the best, Željko Peric