C＃绘制框设置光标

Question

I am trying to draw a box in a console but I cant figure out to do it without entering a new line.

I make something like this:

-----
|   |
_____

But the input line comes directly underneath it and removing the upper row of the box.

I tried with Console.setCursorPosition but the last line is already filled thus already a new line created.

How can I prevent the new line from being created?

Thanks in advance

Edit It is possible to use the console window as a canvas? Lets assume a window with the following size

Height : 50 Width : 100

I can place any character on any of the tiles within the above given console size.

Would this be possible if so how?

Answer 1

I think that very similair task have guys in Microsoft. Have a look:

http://msdn.microsoft.com/en-us/library/system.console.setcursorposition.aspx There's something very similair. Hope this helps.

EDIT:

Console.Write("\b\b");

This should remove last '\\r\\n' characters for new line.

Answer 2

It would be helpful if you posted code you wrote to create this box from ASCII chars.

If you use Console.WriteLine() , just use Console.Write() method for the last line instead. So, for the box in your question the code can look like:

...
Console.WriteLine("-----");
Console.WriteLine("|   |");
Console.Write("-----");
...

Let me know if this helps.

I made a test in a sample application and the extra line seems not to be created.

Update

If you want to use the box a border to the Console window, I suppose it would be the easiest solution (if not the only one) not to add the last - character in the bottom line of the box you are drawing.

Update II

You can try to use a simple trick and dynamically change height of the console window before drawing the last line. This will prevent the window from being scrolled.

Try code like this:

int width = Console.WindowWidth;
int height = Console.WindowHeight;
int i, j;
for (i = 0; i < width; ++i)
{
    Console.Write("-");
}

for (j = 0; j < height - 2; ++j)
{
    Console.Write("|");

    for (i = 0; i < width - 2; ++i)
    {
        Console.Write(" ");
    }

    Console.Write("|");
}

//enlarge window in order to prevent it from being scrolled
Console.WindowHeight += 1;

for (i = 0; i < width; ++i)
{
    Console.Write("-");
}
//restore window's original size
Console.WindowHeight -= 1;
//set cursor inside the border
Console.SetCursorPosition(1, 1);

This should allow you to get the whole border visible in the window.

Update III

The suggested solution

Use the code above, but with Console.BufferWidth instead of Console.WindowHeight . It seems to work correctly and does not require to modify window's dimensions.