DOUBT IN CONSOLE APPLICATION.

Question

HOW TO CLEAR THE SCREEN IN WHILE DOING C# PROGRAMS ON CONSOLE APPLICATION?IN C,WE WE USING clrscr() FUNCTION.HOW TO IMPLEMENT THE SAME IN C#?

tim dinh · Answer

gezzz.... the DOS console has a command called "cls" to clear the screen. Why not use System.Diagnostics.Process to execute the cls command to clear the screen.

csharphelp · Answer

try this using System; using nsClearConsole; namespace ConsoleApplication1 { /// /// Summary description for Class1. /// class Class1 { /// /// The main entry point for the application. /// [STAThread] static void Main(string[] args) { ClearConsole ClearMyConsole = new ClearConsole(); Console.WriteLine("THIS IS FIRST LINE"); // Some text Console.WriteLine("THIS IS SECOND LINE"); // Some text Console.WriteLine("THIS IS THIRD LINE"); // Some text Console.WriteLine("THIS IS FOURTH LINE"); // Some text Console.WriteLine("THIS IS FIFTH LINE"); // Some text Console.WriteLine("Hit Enter to Clear"); // Some text Console.ReadLine(); // Wait for user input ClearMyConsole.Clear(); // Clear the screen Console.WriteLine("THE CONSOLE WAS CLEARED"); // Some text to clear console Console.WriteLine("Hit Enter to Terminate"); //Some text Console.ReadLine(); // Wait for user input } } } and this is the class that contain the nsClearConsole namespace :: using System; using System.Runtime.InteropServices; namespace nsClearConsole { /// /// Summary description for ClearConsole. /// public class ClearConsole { private const int STD_OUTPUT_HANDLE = -11; private const byte EMPTY = 32; [StructLayout(LayoutKind.Sequential)] struct COORD { public short x; public short y; } [StructLayout(LayoutKind.Sequential)] struct SMALL_RECT { public short Left; public short Top; public short Right; public short Bottom; } [StructLayout(LayoutKind.Sequential)] struct CONSOLE_SCREEN_BUFFER_INFO { public COORD dwSize; public COORD dwCursorPosition; public int wAttributes; public SMALL_RECT srWindow; public COORD dwMaximumWindowSize; } [DllImport("kernel32.dll", EntryPoint="GetStdHandle", SetLastError=true, CharSet=CharSet.Auto, CallingConvention=CallingConvention.StdCall)] private static extern int GetStdHandle(int nStdHandle); [DllImport("kernel32.dll", EntryPoint="FillConsoleOutputCharacter", SetLastError=true, CharSet=CharSet.Auto, CallingConvention=CallingConvention.StdCall)] private static extern int FillConsoleOutputCharacter(int hConsoleOutput, byte cCharacter, int nLength, COORD dwWriteCoord, ref int lpNumberOfCharsWritten); [DllImport("kernel32.dll", EntryPoint="GetConsoleScreenBufferInfo", SetLastError=true, CharSet=CharSet.Auto, CallingConvention=CallingConvention.StdCall)] private static extern int GetConsoleScreenBufferInfo(int hConsoleOutput, ref CONSOLE_SCREEN_BUFFER_INFO lpConsoleScreenBufferInfo); [DllImport("kernel32.dll", EntryPoint="SetConsoleCursorPosition", SetLastError=true, CharSet=CharSet.Auto, CallingConvention=CallingConvention.StdCall)] private static extern int SetConsoleCursorPosition(int hConsoleOutput, COORD dwCursorPosition); private int hConsoleHandle; public ClearConsole() { // // TODO: Add constructor logic here. // hConsoleHandle = GetStdHandle(STD_OUTPUT_HANDLE); } public void Clear() { int hWrittenChars = 0; CONSOLE_SCREEN_BUFFER_INFO strConsoleInfo = new CONSOLE_SCREEN_BUFFER_INFO(); COORD Home; Home.x = Home.y = 0; GetConsoleScreenBufferInfo(hConsoleHandle, ref strConsoleInfo); FillConsoleOutputCharacter(hConsoleHandle, EMPTY, strConsoleInfo.dwSize.x * strConsoleInfo.dwSize.y, Home, ref hWrittenChars); SetConsoleCursorPosition(hConsoleHandle, Home); } } }

Solitaire · Answer

It's not possible at all in VS 2003. They promised to add that capability to VS 2005, but don't know if they did.

DOUBT IN CONSOLE APPLICATION.

Answers (3)