Xamarin.Forms - Debug.WriteLine() - where does the output go?

Question

I have a simple Xamarin.Forms project that I'm running in Visual Studio, using an iphone emulator. I have the following code in App.cs:

protected override void OnStart()
{
    Debug.WriteLine("---------- OnStart called!");
}

Where exactly is that supposed to output to? I don't see it in any of the Visual Studio output windows (Build, Build Order, Debug, Xamarin, Xamarin Diagnostics).

Perhaps it's changed now, but I see it in the "Debug" output window when debugging Xamarin Forms on Android — BlueRaja - Danny Pflughoeft, Mar 27 '21 at 00:16

score 12 · Answer 1 · answered Feb 09 '17 at 13:25

12

Using Console.WriteLine() works with Device Log. Also you can filter out all device log with mono-stdout tag.

answered Feb 09 '17 at 13:25

Winzipas

176
2
6

The name `Console` does not exist in the current context though. – Paul May 02 '19 at 20:49
Then just start `using System;` – Max Jun 17 '20 at 05:00
Is it possible to use it's own Tag? How? – testing Nov 29 '21 at 19:34

score 2 · Answer 2 · answered Aug 11 '20 at 19:16

2

Rider has a plugin called Logcat, when I write

Console.WriteLine("**** Hi mate");

, then I can filter the Logcat window for **** and it will show the Console.WriteLine's

This is in Xamarin Forms, for both iOS and Android

answered Aug 11 '20 at 19:16

Atif Rehman

417
6
6

score 1 · Answer 3 · answered Mar 07 '16 at 16:01

1

It should be on the device log, for example on Android you can use the Android Device Monitor to see the message, You can always use Console.Writeline() to see those messages on the debug console.

answered Mar 07 '16 at 16:01

Mario Galván

3,964
6
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Hmm, ok - what library do I need to include ("using xyz...") to use Console? – jbyrd Mar 07 '16 at 18:24
`Console.WriteLine("True!");` I think is `using System;` – Mario Galván Mar 07 '16 at 18:28
I thought so, but I have using System - but Console still is not recognized for some reason. – jbyrd Mar 07 '16 at 18:41
Are you using PCL or Shared project? – Mario Galván Mar 07 '16 at 19:05
1

Oooh, then you must use Debug.WriteLine, and it will pop up inside Application Output. – Mario Galván Mar 07 '16 at 19:12
I see - where is Application Output? That option does not show up in the list in the output window ("Show output from:") - only Build, Build Order, Debug, Xamarin, and Xamarin Diagnostics. – jbyrd Mar 07 '16 at 19:16
Debug is not showing anything? it should print 2 lines on the console. – Mario Galván Mar 07 '16 at 19:39
2

Silly me, I figured it out - I was running the application without debug (Ctrl+F5) instead of with debug (F5). Doh! – jbyrd Mar 07 '16 at 21:34

score 1 · Answer 4 · answered May 11 '18 at 06:23

1

It will be coming in application output window. if it is not open automatically, you can go to view -> Pads -> Application Output. This was about mac visual studio. i am not sure about windows.

answered May 11 '18 at 06:23

shivanju0801

131
2
14

Xamarin.Forms - Debug.WriteLine() - where does the output go?

4 Answers4

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