DOUBT IN CONSOLE APPLICATION.

Question

HOW TO CLEAR THE SCREEN IN WHILE DOING C# PROGRAMS ON CONSOLE APPLICATION?IN CWE 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.