No output to console from a WPF application

Question

I m using Console WriteLine   from a very simple WPF test application  but when I execute the application from the command line  I m seeing nothing being written to the console  Does anyone know what might be going on here  I can reproduce it by creating a WPF application in VS 2008  and simply adding Console WriteLine  quot text quot   anywhere where it gets executed  Any ideas  All I need for right now is something as simple as Console WriteLine    I realize I could use log4net or somet other logging solution  but I really don t need that much functionality for this application  Edit  I should have remembered that Console WriteLine   is for console applications  Oh well  no stupid questions  right   -  I ll just use System Diagnostics Trace WriteLine   and DebugView for now

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It s possible to see output intended for console by using command line redirection   For example   C  src bin Debug Example exe  gt  output txt   will write all the content to output txt file

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You can use   Trace WriteLine  text      This will output to the  Output  window in Visual Studio  when debugging    make sure to have the Diagnostics assembly included   using System Diagnostics

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I ve create a solution  mixed the information of varius post   Its a form  that contains a label and one textbox  The console output is redirected to the textbox   There are too a class called ConsoleView that implements three publics methods  Show    Close    and Release    The last one is for leave open the console and activate the Close button for view results   The forms is called FrmConsole  Here are the XAML and the c  code   The use is very simple   ConsoleView Show  Title of the Console      For open the console  Use   System Console WriteLine  The debug message      For output text to the console   Use   ConsoleView Close      For Close the console   ConsoleView Release      Leaves open the console and enables the Close button  XAML   lt Window x Class  CustomControls FrmConsole      xmlns  http   schemas microsoft com winfx 2006 xaml presentation      xmlns x  http   schemas microsoft com winfx 2006 xaml      xmlns d  http   schemas microsoft com expression blend 2008      xmlns mc  http   schemas openxmlformats org markup-compatibility 2006      xmlns local  clr-namespace CustomControls      mc Ignorable  d      Height  500  Width  600  WindowStyle  None  ResizeMode  NoResize  WindowStartupLocation  CenterScreen  Topmost  True  Icon  Images icoConsole png  gt   lt Grid gt       lt Grid RowDefinitions gt           lt RowDefinition Height  40   gt           lt RowDefinition Height      gt           lt RowDefinition Height  40   gt       lt  Grid RowDefinitions gt       lt Label Grid Row  0  Name  lblTitulo  HorizontalAlignment  Center  HorizontalContentAlignment  Center  VerticalAlignment  Center  VerticalContentAlignment  Center  FontFamily  Arial  FontSize  14  FontWeight  Bold  Content  Titulo   gt       lt Grid Grid Row  1  gt           lt Grid ColumnDefinitions gt               lt ColumnDefinition Width  10   gt               lt ColumnDefinition Width      gt               lt ColumnDefinition Width  10   gt           lt  Grid ColumnDefinitions gt           lt TextBox Grid Column  1  Name  txtInner  FontFamily  Arial  FontSize  10  ScrollViewer CanContentScroll  True  VerticalScrollBarVisibility  Visible  HorizontalScrollBarVisibility  Visible  TextWrapping  Wrap   gt       lt  Grid gt       lt Button Name  btnCerrar  Grid Row  2  Content  Cerrar  Width  100  Height  30  HorizontalAlignment  Center  HorizontalContentAlignment  Center  VerticalAlignment  Center  VerticalContentAlignment  Center   gt   lt  Grid gt      The code of the Window   partial class FrmConsole   Window       private class ControlWriter   TextWriter               private TextBox textbox          public ControlWriter TextBox textbox                        this textbox   textbox                     public override void WriteLine char value                        textbox Dispatcher Invoke new Action      gt                                textbox AppendText value ToString                     textbox AppendText Environment NewLine                   textbox ScrollToEnd                                        public override void WriteLine string value                        textbox Dispatcher Invoke new Action      gt                                textbox AppendText value                   textbox AppendText Environment NewLine                   textbox ScrollToEnd                                        public override void Write char value                        textbox Dispatcher Invoke new Action      gt                                textbox AppendText value ToString                     textbox ScrollToEnd                                        public override void Write string value                        textbox Dispatcher Invoke new Action      gt                                textbox AppendText value                   textbox ScrollToEnd                                        public override Encoding Encoding                       get   return Encoding UTF8                            DEFINICIONES DE LA CLASE      region DEFINICIONES DE LA CLASE       endregion         CONSTRUCTORES DE LA CLASE      region CONSTRUCTORES DE LA CLASE      public FrmConsole string titulo                InitializeComponent            lblTitulo Content   titulo          Clear            btnCerrar Click    new RoutedEventHandler BtnCerrar Click           Console SetOut new ControlWriter txtInner            DesactivarCerrar                endregion         PROPIEDADES      region PROPIEDADES       endregion         DELEGADOS      region DELEGADOS      private void BtnCerrar Click object sender  RoutedEventArgs e                Close                endregion         METODOS Y FUNCIONES      region METODOS Y FUNCIONES      public void ActivarCerrar                 btnCerrar IsEnabled   true             public void Clear                 txtInner Clear               public void DesactivarCerrar                 btnCerrar IsEnabled   false              endregion       the code of ConsoleView class  static public class ConsoleView         DEFINICIONES DE LA CLASE      region DEFINICIONES DE LA CLASE     static FrmConsole console      static Thread StatusThread      static bool isActive   false       endregion        CONSTRUCTORES DE LA CLASE      region CONSTRUCTORES DE LA CLASE       endregion        PROPIEDADES      region PROPIEDADES       endregion        DELEGADOS      region DELEGADOS       endregion        METODOS Y FUNCIONES      region METODOS Y FUNCIONES      public static void Show string label                if  isActive                        return                     isActive   true            create the thread with its ThreadStart method         StatusThread   new Thread      gt                        try                               console   new FrmConsole label                   console ShowDialog                      this call is needed so the thread remains open until the dispatcher is closed                 Dispatcher Run                              catch  Exception                                                     run the thread in STA mode to make it work correctly         StatusThread SetApartmentState ApartmentState STA           StatusThread Priority   ThreadPriority Normal          StatusThread Start                public static void Close                 isActive   false          if  console    null                          need to use the dispatcher to call the Close method  because the window is created in another thread  and this method is called by the main thread             console Dispatcher InvokeShutdown                console   null              StatusThread   null                     console   null             public static void Release                 isActive   false          if  console    null                        console Dispatcher Invoke console ActivarCerrar                         endregion     I hope this result usefull

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Check out this post  was very helpful for myself  Download the code sample   http   www codeproject com Articles 335909 Embedding-a-Console-in-a-C-Application

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Right click on the project   Properties    Application  tab  change  Output Type  to  Console Application   and then it will also have a console

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I use Console WriteLine   for use in the Output window

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You ll have to create a Console window manually before you actually call any Console Write methods  That will init the Console to work properly without changing the project type  which for WPF application won t work    Here s a complete source code example  of how a ConsoleManager class might look like  and how it can be used to enable disable the Console  independently of the project type   With the following class  you just need to write ConsoleManager Show   somewhere before any call to Console Write      SuppressUnmanagedCodeSecurity  public static class ConsoleManager       private const string Kernel32 DllName    kernel32 dll         DllImport Kernel32 DllName       private static extern bool AllocConsole          DllImport Kernel32 DllName       private static extern bool FreeConsole          DllImport Kernel32 DllName       private static extern IntPtr GetConsoleWindow          DllImport Kernel32 DllName       private static extern int GetConsoleOutputCP         public static bool HasConsole               get   return GetConsoleWindow      IntPtr Zero                    lt summary gt          Creates a new console instance if the process is not attached to a console already           lt  summary gt      public static void Show                    if DEBUG         if   HasConsole                        AllocConsole                InvalidateOutAndError                         endif                 lt summary gt          If the process has a console attached to it  it will be detached and no longer visible  Writing to the System Console is still possible  but no output will be shown           lt  summary gt      public static void Hide                    if DEBUG         if  HasConsole                        SetOutAndErrorNull                FreeConsole                         endif            public static void Toggle                 if  HasConsole                        Hide                      else                       Show                         static void InvalidateOutAndError                 Type type   typeof System Console            System Reflection FieldInfo  out   type GetField   out               System Reflection BindingFlags Static   System Reflection BindingFlags NonPublic            System Reflection FieldInfo  error   type GetField   error               System Reflection BindingFlags Static   System Reflection BindingFlags NonPublic            System Reflection MethodInfo  InitializeStdOutError   type GetMethod  InitializeStdOutError               System Reflection BindingFlags Static   System Reflection BindingFlags NonPublic            Debug Assert  out    null           Debug Assert  error    null            Debug Assert  InitializeStdOutError    null             out SetValue null  null            error SetValue null  null             InitializeStdOutError Invoke null  new object     true                static void SetOutAndErrorNull                 Console SetOut TextWriter Null           Console SetError TextWriter Null

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Although John Leidegren keeps shooting down the idea  Brian is correct  I ve just got it working in Visual Studio   To be clear a WPF application does not create a Console window by default   You have to create a WPF Application and then change the OutputType to  Console Application   When you run the project you will see a console window with your WPF window in front of it   It doesn t look very pretty  but I found it helpful as I wanted my app to be run from the command line with feedback in there  and then for certain command options I would display the WPF window

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Old post  but I ran into this so if you re trying to output something to Output in a WPF project in Visual Studio  the contemporary method is   Include this   using System Diagnostics    And then   Debug WriteLine  something

[c#] No output to console from a WPF application?

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