为什么 Console.Writeline、Console.Write 在 Visual Studio Express 中不起作用？

Question

I just open a console application and I type

Console.WriteLine("Test");

But the output window doesn't show this. I go to the output window with Ctrl + W , O .

But nothing shows up when I run my program. Am I nuts or is this not supported in Visual Studio 2010 Express ?

Answer 1

Console.WriteLine将您的输出写入由您的应用程序打开的控制台窗口（想想当您打开命令提示符时出现的带有白色文本的黑色窗口。）改为尝试System.Diagnostics.Debug.WriteLine 。

Answer 2

No satisfactory answers provided.

System.Diagnostics.Debug.WriteLine() will write messages to the Output:debug window, but so much crap is constantly dumped into that window by every process under the sun, it is like finding a needle in a haystack to find YOUR messages.

Console.WriteLine() does not write to any window in Visual Studio. I guess it will only write to the application console if your application creates a console in the first place, ie if it is a Console application.

Why is the tooling making the simple task of having your web application server side code .cs code write some debug messages into a window which is swamped with crap making it almost impossible to find your information?

Answer 3

Go to properties in you own project in Solution Explorer window and choose application type and look for Output Type and change it's value to Console Application . This will make console screen besides your form. If you close console screen, your form will be closed too.

Good luck.

Answer 4

Perhaps the console is clearing. Try:

Console.WriteLine("Test");
Console.ReadLine();

And it will hopefully stay there until you press enter.

Answer 5

或者您可以通过CTRL+F5进行调试，这将在执行最后一行后打开 ConsoleWindow 等待，直到您按下键。

Answer 6

It's more than likely because you've used Console in the namespace. For example like this:

namespace XYZApplication.Console
{
    class Program
    {
        static void Main(string[] args)
       {
            //Some code;             
       }
    }
}

Try removing it from the namespace or use the full namespace instead ie

   System.Console.Writeline("abc");

Answer 7

Try ctrl+F5, it will hold your Screen until you press any key. Regards

Answer 8

In Winforms app, both methods:

System.Diagnostics.Debug.WriteLine("my string")

and

System.Console.WriteLine("my string")

write to the output window.

In AspNetCore app, only System.Diagnostics.Debug.WriteLine("my string") writes to the output window.

Answer 9

The output window isn't the console. Try the methods in System.Diagnostics.Debug

Answer 10

Right click on the project in solution-explorer and click "clean".

Now run F5

Make sure the code is as below:

Console.WriteLine("TEST");
Console.ReadLine();

Answer 11

I run into a similar problem while running a Unit Test. Console.WriteLine() did not write anything into the VS Output Window.

Using System.Diagnostics.Debug.WriteLine() solved the problem.

Answer 12

If you use Ctrl-F5 (start without debugging) it will leave the console window open with a message "Press any key to continue". That's the easiest way to keep the console window from closing so you can see the console output.

Answer 13

转到调试菜单并选择选项并取消选中“将所有输出窗口文本重定向到立即窗口”

Answer 14

如果您正在开发命令行应用程序，您还可以在代码末尾使用Console.ReadLine()以在关闭控制台窗口之前等待“Enter”按键，以便您可以读取输出。

Answer 15

using System.Diagnostics;


Trace.WriteLine("This line will show on Output window"); 
Trace.Flush();

This works on Microsoft Team Explorer for Visual Studio 2013

Refer to microsoft.com

Answer 16

Workaround I found:

Press Ctrl + Alt + I or navigate to "Debug Tab" ---> "Windows" ---> "Immediate".

In your code write:

Trace.WriteLine("This is one of the workaround");

Answer 17

Visual Studio 2017 的输出窗口有一个名为Show output from的菜单，在我的情况下， ASP.NET Core Web Server是选择以查看打印输出的选项，因为我将它设置为Build所以我遇到了这个问题我在运行时没有看到打印出来的行。

Answer 18

There are 2 possible problems are:

• Firstly, you have not used the using System which should be before writing code that uses "System class", as Console.WriteLine()
• Secondly, you have not coded what happens after the Console displays "Test"

The possible solution will be:

using System;

namespace Test
{
    public static Main()
    {
        //Print to the console
        Console.WriteLine("Test");

        //Allow user to read output
        Console.ReadKey();
    }
}

It is also strategic to code Console.Write("Press any key to exit..."); on the line that precedes the Console.ReadKey(); to make the user aware that the program is ending, he/she must press any key to exit.

Answer 19

None of the answers here worked for me!! Most of these people here are stuck in Windows Desktop Application Consoleland . If you are a web developer using ASP.NET in Visual Studio and do not see any console or debug text, here is how to fix that:

1. Paste the following two tests into your code so it runs both lines. These are tests for the output window:

   System.Console.WriteLine($"hello console!");

   System.Diagnostics.Debug.WriteLine($"hello debugger!");

2. In Visual Studio choose VIEW > OUTPUT. You will see the results above in this output window after changing two settings below.

3. When NOT DEBUGGING, in the OUTPUT window at the top under "Show Output From" choose: " YourProjectName - ASP.NET CORE Web Server ". Run your code. You should see the "Console" text above.

4. When DEBUGGING, in the OUTPUT window at the top under "Show Output From" choose: " Debugger ". Run your code in debug mode. You should see the "Debug" text above.

Answer 20

Change the execution mode to "Self Hosted". In this case, the execution console will appear and all the messages will be displayed.

Answer 21

Console.Writeline()显示在调试输出中（调试 => Windows => 输出）。