I am trying to self teach myself C# and wondering if anyone can help me with what seems to be a basic C# question. I created a C# file with this code, started debugging but don’t see “Hello World” anywhere.
using System;
class Hello
{
static void Main() {
Console.WriteLine("hello, world");
}
}
http://msdn.microsoft.com/en-us/library/aa664628(v=vs.71).aspx
So I guess my question is this. Where should I expect to see “Hello World”? I have checked the Console and the Browser. Is there some setup that needs to be done to properly debug C# files. I am probably missing the big picture as to how C# works. I am use to PHP where I can just do something like this...
<?php
include 'my file';
echo 'my file included';
?>
Any help would be much appreciated. Thanks.
EDIT:
Thanks everybody for all of the help. You have all helped me understand and realize a number of things about C# / .NET. After extensive troubleshooting it is evident that the problem is not a mater of the debugging working, but the fact that my C# file doesn't appear to be properly hooked/included (not sure what its called in .NET terms) to the rest of the project. Anyways I am accepting keyboardP's answer as he answered first and technically gave me all the right answers. Also thanks to dasblinkenlight who was also extra helpful.
Additional Solution:
After insight from SO users. This article helped point me in the right direction.
http://www.asp.net/mvc/tutorials/getting-started-with-aspnet-mvc3/cs/intro-to-aspnet-mvc-3
I'm guessing it's because the command prompt window is immediately closing. You can avoid this by adding Console.ReadLine(); after your WriteLine statement. This will wait for you to press return before closing the prompt window.
Alternatively, assuming you're using Visual Studio, you can run the build without a debugger attached by pressing CTRL + F5.
Edit - Based on the extra information added that you're using ASP.NET and not a console application.
Firstly, what are you trying to achieve? If you want to output debug information, then you can Debug.WriteLine instead of Console.WriteLine
System.Diagnostics.Debug.WriteLine("Hello World");
This will output the text to the "Output" window at the bottom of Visual Studio (by default).
Edit 2 Since you just want to write random text to the page, you can use
HttpContext.Current.Response.Write("Hello World");
There are sometimes issues with Response.Write but it should be okay for what you want to do here.
Use breakpoints. Set a breakpoint at the end of your method by clicking in the "gutter" area. A red circle will appear that looks like this:
Now run your program in debug mode by clicking the button with the green triangle or pressing F5. The program will run, producing the output in the console (a separate window). Once it hits your breakpoint, you can examine the console for the output, like this:
You are reading a tutorial for Console Application, however you are trying to create a ASP.NET application. I would reccomend reading a tutorial for ASP.NET
Like many before said: it goes by too fast, so either use breakpoints, or use a Read...
You can also write to your Visual Studio output window with System.Diagnostics.Debug.Write
you need to put break point over the line which you want to debug
short cut to placing break point is ctrl D,n
then you can step over or step into the code with f10 and f11 function keys
Related
I'm debugging a C# console application using Visual Studio for the Mac. I'm using frequent Console.WriteLine() statements.
Is there anyway to clear the output of the Terminal - macOS pad where the Console output is displayed every time I run / debug the program? I've tried calls to Console.Clear() to no effect. I have seen suggestions to use Cmd-K but that doesn't work. Other suggestions are all for VSCode, not Visual Studio.
Surely I can't be the only one who finds seeing the old output distracting when debugging?
You aren't alone. I was just wondering why it didn't clear the screen either. There is an option to use Terminal, instead of the built in terminal. Check under Preferences > Terminal, then remove the check mark next to "Enable Integrated Terminal" and it will just pop up in a normal terminal which doesn't seem to have that issue. If you figure something else out let me know though.
You may deactivate and reactivate the integrated terminal in : preferences\terminal options\uncheck\check. You may have to close VSFM between the uncheck\check process in order to clear the entre data. That way, it does clear the terminal data, but I would prefer some fast “clear” kind of short-cut options instead.
Have a good one.
Prog
Close the terminal window, then the next run will open an empty one.
I call Console.Clear() at first line each time Run project
I came here looking for the solution as I couldn't figure it out for the life of me, tried 'cmd + k' and it worked.
I could have sworn I'd tried it in the past with no success.
Maybe a few points that will help:
Have the terminal selected.
The terminal line has to empty.
New to coding, first stack overflow comment, hope this has some value.
So I am starting to learn how to program and picked up a c# book and downloaded Xamarin Studio on my Mac to get started. The book I am using inevitably uses Visual Studio but I figured it would be essentially the same, but I have already come across a few issues:
When I first create a new console application, it automatically starts up with a hello world template. Is there any way to make the IDE start without this line, as I'm sure it can become somewhat of an annoyance down the road:
Console.WriteLine("Hello World!");
In other words, can I modify the template that Xamarin Studio starts up in?
When I click on Run ---> Start Debugging with the program below, I get the same result as when I run the program without debugging. In both cases, the application fully works as expected, but in my book the author mentions the screen should flash for a split second, unless you include Console.ReadKey();
Is there anything I am missing? And when I include that extra line, I get the expected result of having to push a key twice to end the program regardless of whether I run with or without debugging.
Here is the exact source code:
using System;
namespace test
{
class MainClass
{
public static void Main(string[] args)
{
Console.WriteLine("Hello World!");
}
}
}
When I first create a new console application, it automatically starts up with a hello world template. Is there any way to make the IDE start without this line, as I'm sure it can become somewhat of an annoyance down the road
Thats interesting thought but as the template itself suggests that its black console app, it should have some code which runs successfully.
When I click on Run ---> Start Debugging with the program below, I get the same result as when I run the program without debugging. In both cases, the application fully works as expected, but in my book the author mentions the screen should flash for a split second, unless you include Console.ReadKey(); Is there anything I am missing? And when I include that extra line, I get the expected result of having to push a key twice to end the program regardless of whether I run with or without debugging.
Well, this is just how Xamarin Studio works. The answer to your question lies in how Xamarin Studio is configured. By default Xamarin studio handles some things, there is an option which paused the console by default. If you want to see Console.ReadKey() in action, just right click on your project and go to options -> Run -> General -> Uncheck (Pause Console Output).
But as there is no Console built in Xamarin Studio the external Console (by default Terminal) is used you wont be able to see the flash effect.
Hope this helps. Thanks and happy coding :)
How do you print or output text in Monogame?
I googled how to display text in monogame and was led to this:
Debug.WriteLine
Which says: "By default, the output is written to an instance of DefaultTraceListener."(and that page just confused me more).
So, if someone could direct me to a method of displaying DefaultTraceListener, or another method of outputting text in monogame, I would appreciate it.
I found it!
Using Debug.WriteLine writes to the debugger, which is in the output window in Visual Studio(by default at the bottom). It appears when you close the program(press F5 to start, Esc to close) by default in an OpenGL project.
If you like, you can use Console.WriteLine like you would in a normal C# console application, assuming you're developing a desktop application. There are a couple of steps.
Open the Properties for your MonoGame project
Select the Application tab
Change the Output Type to Console Application.
Your application should run as normal, only a console window should appear when you start the game.
Alternatively, you can use Debug.WriteLine, which will write to the output window in Visual Studio (it should appear when you start debugging your game).
If you use the standard Debug.WriteLine or Trace.WriteLine, then output goes to the default trace listener which can be viewed in the Visual Studio output window. Outside of Visual Studio, you can use programs such as DebugView (SysInternals) or LogFusion (Binary Fortress) to display the output. DebugView even has a feature for viewing debug output from a remote machine.
There are other trace listeners that can send output to a file, or to the Windows event log, or you can write your own trace listeners fairly easily.
You could also consider using a ready-made logging framework such as NLog, which would give you a great deal of flexibility. I have found in practice that using NLog turns out to be a lot easier than the built in stuff in .NET, because of the way it lets you easily reconfigure things and control/filter the output in a much more flexible way.
I know this has been answered, but if anyone else stumbles upon this, you can also use Console.Write(thing in here); or Console.WriteLine(thing in here); to write to the console window. WriteLine adds a line ending and Write does not.
I'm new to Visual Studio, I just started using it for my programming class. I downloaded C# 2010 from the website, and every time I try to debug the code the form window doesn't show up as the black box with the output, rather it displays a blank gray box. I have no clue how to check my code, I haven't been able to find anyone else with this problem, someone please help!
As you are assuming a black box - mean you want to start with a Console Application
and your are getting a gray box - mean you had chosen the Windows Form Application.
So What to do you is :
Select a Console Application.
Like File -> New -> Project -> Console Application.
Put breakpoints on your code. and press F5 to run your application in debug mode.
Put a debug point in the code on the left side where you have a empty column.. Then click F5 to run the code with debugging.. It will stop when the break point is hit..
Check this tutorial
Are you sure you have the solution configuration set to Debug ? Or is it Release? Read this for details.
I am developing some projects in C# and Silverlight.
I am trying to print lines of code in order to debug, but Console.Write() doesn't seem to work.
I've created a Silverlight Application, not a Console Application where Console.Write() did work. How can I print in a console or in the output window in a Silverlight Application project?
Use System.Diagnostics.Debug.Write to print in the debug output window.
See http://msdn.microsoft.com/en-us/library/system.diagnostics.debug.write.aspx
Using System.Diagnostics.Debug.WriteLine(); like Fox32 and VoodooChild mentioned did not work for me initially. Apparently my debugging wasn't working at all (breakpoints did not hit for example).
I was able to fix the debugging by using IE instead of FireFox (see Debugging Silverlight not hitting breakpoints)
As soon as that was fixed, the System.Diagnostics.Debug.WriteLine(); worked perfectly :)