Find the line number of console application?

Question

I have a program that uses Console.WriteLine(); to output to the user in many different locations in the program. Is there a way to get what line the last printed line of output is in the console application? Without incrementing a counter every Console.WriteLine();. For example, in the following code "Bar Foo" would have printed as line 4. Here would be an example program:

Console.WriteLine("Foo");
Console.WriteLine("Foo Bar");
Console.WriteLine("Bar");
Console.WriteLine("Bar Foo");

output:

Foo

Foo Bar

Bar

Bar Foo

Very cood technique posted here: [How to get current line number - for example use at messagebox.show](http://stackoverflow.com/questions/12556767/how-to-get-current-line-number-for-example-use-at-messagebox-show) — Jonathan Wood, Oct 07 '14 at 01:49

score 1 · Answer 1 · answered Oct 07 '14 at 01:45

1

No you need something custom to keep track of it. However you can internalize it and make your own class that wraps Console.WriteLine to avoid repeated counter logic.

answered Oct 07 '14 at 01:45

TGH

38,769
12
102
135

Hossein · Accepted Answer · 2014-10-07T02:32:29.843

You can use CallerLineNumber which is introduce in .Net 4.5.
You may have something like this:

static void WriteLine(string message, [CallerLineNumber] int lineNumber = 0)
{
    Console.WriteLine(lineNumber + ": " + message);
}

And in your sourcecode you can simply call it like :

WriteLine("Foo");
WriteLine("Foo Bar");
WriteLine("Bar");
WriteLine("Bar Foo");

If you must use a lower version of .Net you can use :

static void WriteLine(string message)
{
    StackFrame callStack = new StackFrame(1, true);
    var lineNumber = callStack.GetFileLineNumber();
    Console.WriteLine(lineNumber + ": " + message);
}

And again you just need to call it :

WriteLine("Foo");
WriteLine("Foo Bar");
WriteLine("Bar");
WriteLine("Bar Foo");

Tyress · Answer 3 · 2014-10-07T03:03:31.527

0

Actually, every time you do a Console.WriteLine(), the cursor moves as well. So you can use the position of the cursor as a 0-based index of the line number:

        Console.WriteLine("Foo" + (Console.CursorTop+1));
        Console.WriteLine("Foo Bar" + (Console.CursorTop + 1));
        Console.WriteLine("Bar" + (Console.CursorTop + 1));
        Console.WriteLine("Bar Foo" + (Console.CursorTop + 1));

edited Oct 07 '14 at 03:03

answered Oct 07 '14 at 02:56

Tyress

3,573
2
22
45

Find the line number of console application?

3 Answers3