Application is not available ошибка

i have the standard code for Program.cs:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;

namespace cellap
{
    static class Program
    {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form1());
        }
    }
}
  1. i created a new project
  2. i imported an existing form1 into it and replaced the existing form1

  3. when i run the app, i get an error on the mentioned line:

    Error 1 The type or namespace name ‘Form1’ could not be found (are you missing a using directive or an assembly reference?) C:\Users\alexluvsdanielle\AppData\Local\Temporary Projects\cellap\Program.cs 18 33 cellap

does anyone know what the problem is?

asked Jul 5, 2010 at 23:29

Alex Gordon's user avatar

Alex GordonAlex Gordon

57.6k289 gold badges671 silver badges1066 bronze badges

2

Check your namespace. The existing Form1 is more than likely in a different namespace than cellap. Check the Form1.designer.cs class too.

answered Jul 5, 2010 at 23:49

Dennis's user avatar

DennisDennis

20.3k4 gold badges64 silver badges80 bronze badges

When you copied the Form did you change it’s namespace so the Program.cs can actually see it?

answered Jul 5, 2010 at 23:49

Jesper Fyhr Knudsen's user avatar

using ProjectName.folder

Then create an object for the Form1() class like this.

Form1 form1 = new Form1();
Application.Run(form1);

Also, make sure you actually have a Form1.cs

Servy's user avatar

Servy

202k27 gold badges334 silver badges450 bronze badges

answered Aug 22, 2016 at 18:51

Raymond Dumalaog's user avatar

Источник
  • Remove From My Forums

  • Question

  • Trying to run the code here:

    http://msdn.microsoft.com/en-us/library/x0tz73t0.aspx

    Under Form1.cs, I get a squiggle line under here:

    [STAThread]

    public
    static void Main()

    Also, under Program.cs, I get a squiggle line under here:

    Application.Run(new
    Form1());

    The only way I can get rid of those error is to comment out those sections of code. 
    If I comment out the code and hit F5, the project doesn’t do anything at all. 
    What am I missing here?

Answers

  • The compiler doesn’t look for a Program.cs file. The Main method can be in any class.

    My guess is that the OP didn’t copy all the code at the linked page. A «using System» may be missing, and the linked page has «Application.Run(new TicTacToe())».

    • Proposed as answer by

      Thursday, December 16, 2010 4:42 PM

    • Marked as answer by
      Rudedog2
      Saturday, December 18, 2010 1:32 PM

  • It is time for a «do over».

    Create a new Windows Forms application.  Add a new class file, and name it «TicTacToe.cs».  Paste the sample class at your link into this file.  Observe the namespace names.  Copy and paste just the content of the class.

    You should now get an error that there are more than one Main method if you try to build the application.  Open up your Program.cs file and comment out the Main method inside of it.  This should clear the error about more than one Main method. 

    The new class contains a Main method.  It can be seen near the bottom of the class.  The samples in the MSDN library are not designed to work exclusively inside of the Visual Studio IDE.  Most are designed to work from a command line
    build.

    Actually, you may comment out either Main method that you wish.  Most people would prefer to comment out the Main method within the form class, TicTacToe.  Doing so would require that you modify the Main method in the Program.cs file to start TicTacToe,
    instead of Form1.  See code posted above.

    Hope this helps.

    Rudy   =8^D

    Mark the best replies as answers. «Fooling computers since 1971.»

    http://rudedog2.spaces.live.com/default.aspx

    • Marked as answer by
      ryguy72
      Friday, December 17, 2010 2:37 AM
    • Edited by
      Rudedog2
      Friday, December 17, 2010 11:49 AM

Источник

Problem Description:

i have the standard code for Program.cs:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;

namespace cellap
{
    static class Program
    {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form1());
        }
    }
}
  1. i created a new project
  2. i imported an existing form1 into it and replaced the existing form1

  3. when i run the app, i get an error on the mentioned line:

    Error 1 The type or namespace name ‘Form1’ could not be found (are you missing a using directive or an assembly reference?) C:UsersalexluvsdanielleAppDataLocalTemporary ProjectscellapProgram.cs 18 33 cellap

does anyone know what the problem is?

Solution – 1

Check your namespace. The existing Form1 is more than likely in a different namespace than cellap. Check the Form1.designer.cs class too.

Solution – 2

When you copied the Form did you change it’s namespace so the Program.cs can actually see it?

Solution – 3

using ProjectName.folder

Then create an object for the Form1() class like this.

Form1 form1 = new Form1();
Application.Run(form1);

Also, make sure you actually have a Form1.cs

Источник

У меня есть стандартный код для Program.cs:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;

namespace cellap
{
    static class Program
    {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form1());
        }
    }
}
  1. я создал новый проект
  2. я импортировал существующую форму1 и заменил существующую форму1

  3. когда я запускаю приложение, я получаю сообщение об ошибке в указанной строке:

    Ошибка 1 Не удалось найти тип или имя пространства имен «Form1» (отсутствует директива using или ссылка на сборку?) C:\Users\alexluvsdanielle\AppData\Local\Temporary Projects\cellap\Program.cs 18 33 cellap

кто-нибудь знает в чем проблема?

2010-07-05 23:29

3
ответа

Решение

using ProjectName.folder

Затем создайте объект для класса Form1() следующим образом.

Form1 form1 = new Form1();
Application.Run(form1);

Кроме того, убедитесь, что у вас есть Form1.cs

2016-08-22 18:51

Проверьте ваше пространство имен. Существующий Form1 более чем вероятно в другом пространстве имен, чем cellap, Проверить Form1.designer.cs класс тоже.


user73025

05 июл ’10 в 23:49
2010-07-05 23:49

2010-07-05 23:49

Когда вы скопировали форму, вы изменили ее пространство имен, чтобы Program.cs мог ее увидеть?


user80449

05 июл ’10 в 23:49
2010-07-05 23:49

2010-07-05 23:49

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