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Console.Clear Method

Note: This method is new in the .NET Framework version 2.0.

Clears the console buffer and corresponding console window of display information.

Namespace: System
Assembly: mscorlib (in mscorlib.dll)

public static void Clear ()
public static void Clear ()
public static function Clear ()

Exception typeCondition

IOException

An I/O error occurred.

Using the Clear method is equivalent invoking the MS-DOS cls command in the command prompt window. When the Clear method is called, the cursor automatically scrolls to the top-left corner of the window and the contents of the screen buffer are set to blanks using the current foreground background colors.

This example demonstrates the CursorLeft and CursorTop properties, and the SetCursorPosition and Clear methods. The example positions the cursor, which determines where the next write will occur, to draw a 5 character by 5 character rectangle using a combination of "+", "|", and "-" strings. Note that the rectangle could be drawn with fewer steps using a combination of other strings.

// This example demonstrates the 
//     Console.CursorLeft and 
//     Console.CursorTop properties, and the
//     Console.SetCursorPosition and 
//     Console.Clear methods.
using System;

class Sample 
{
    protected static int origRow;
    protected static int origCol;

    protected static void WriteAt(string s, int x, int y)
    {
    try
        {
        Console.SetCursorPosition(origCol+x, origRow+y);
        Console.Write(s);
        }
    catch (ArgumentOutOfRangeException e)
        {
        Console.Clear();
        Console.WriteLine(e.Message);
        }
    }

    public static void Main() 
    {
// Clear the screen, then save the top and left coordinates.
    Console.Clear();
    origRow = Console.CursorTop;
    origCol = Console.CursorLeft;

// Draw the left side of a 5x5 rectangle, from top to bottom.
    WriteAt("+", 0, 0);
    WriteAt("|", 0, 1);
    WriteAt("|", 0, 2);
    WriteAt("|", 0, 3);
    WriteAt("+", 0, 4);

// Draw the bottom side, from left to right.
    WriteAt("-", 1, 4); // shortcut: WriteAt("---", 1, 4)
    WriteAt("-", 2, 4); // ...
    WriteAt("-", 3, 4); // ...
    WriteAt("+", 4, 4);

// Draw the right side, from bottom to top.
    WriteAt("|", 4, 3);
    WriteAt("|", 4, 2);
    WriteAt("|", 4, 1);
    WriteAt("+", 4, 0);

// Draw the top side, from right to left.
    WriteAt("-", 3, 0); // shortcut: WriteAt("---", 1, 0)
    WriteAt("-", 2, 0); // ...
    WriteAt("-", 1, 0); // ...
//
    WriteAt("All done!", 0, 6);
    Console.WriteLine();
    }
}
/*
This example produces the following results:

+---+
|   |
|   |
|   |
+---+

All done!

*/

// This example demonstrates the 
//     Console.CursorLeft and 
//     Console.CursorTop properties, and the
//     Console.SetCursorPosition and 
//     Console.Clear methods.

import System.*;

class Sample
{
    protected static int origRow;
    protected static int origCol;

    protected static void WriteAt(String s, int x, int y) 
    {
        try {
            Console.SetCursorPosition(origCol + x, origRow + y);
            Console.Write(s);
        }
        catch (ArgumentOutOfRangeException e) {
            Console.Clear();
            Console.WriteLine(e.get_Message());
        }
    } //WriteAt

    public static void main(String[] args)
    {
        // Clear the screen, then save the top and left coordinates.
        Console.Clear();
        origRow = Console.get_CursorTop();
        origCol = Console.get_CursorLeft();
        // Draw the left side of a 5x5 rectangle, from top to bottom.
        WriteAt("+", 0, 0);
        WriteAt("|", 0, 1);
        WriteAt("|", 0, 2);
        WriteAt("|", 0, 3);
        WriteAt("+", 0, 4);
        // Draw the bottom side, from left to right.
        WriteAt("-", 1, 4); // shortcut: WriteAt("---", 1, 4)
        WriteAt("-", 2, 4); // ...
        WriteAt("-", 3, 4); // ...
        WriteAt("+", 4, 4);
        // Draw the right side, from bottom to top.
        WriteAt("|", 4, 3);
        WriteAt("|", 4, 2);
        WriteAt("|", 4, 1);
        WriteAt("+", 4, 0);
        // Draw the top side, from right to left.
        WriteAt("-", 3, 0); // shortcut: WriteAt("---", 1, 0)
        WriteAt("-", 2, 0); // ...
        WriteAt("-", 1, 0); // ...
        //
        WriteAt("All done!", 0, 6);
        Console.WriteLine();
    } //main
} //Sample
/*
This example produces the following results:

+---+
|   |
|   |
|   |
+---+

All done!

*/

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0
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