Ошибка компилятора cs0120

asked Jan 31, 2009 at 6:22

For this case, where you want to get a Control of a Form and are receiving this error, then I have a little bypass for you.

Go to your Program.cs and change

Application.Run(new Form1());

to

public static Form1 form1 = new Form1(); // Place this var out of the constructor
Application.Run(form1);

Now you can access a control with

Program.form1.<Your control>

Also: Don’t forget to set your Control-Access-Level to Public.

And yes I know, this answer does not fit to the question caller, but it fits to googlers who have this specific issue with controls.

answered Jan 7, 2017 at 20:28

You start a thread which runs the static method SumData. However, SumData calls SetTextboxText which isn’t static. Thus you need an instance of your form to call SetTextboxText.

Credit to @COOLGAMETUBE for tipping me off to what ended up working for me. His idea was good but I had a problem when Application.SetCompatibleTextRenderingDefault was called after the form was already created. So with a little change, this is working for me:

static class Program
{
    public static Form1 form1; // = new Form1(); // Place this var out of the constructor

    /// <summary>
    /// The main entry point for the application.
    /// </summary>
    [STAThread]
    static void Main()
    {
        Application.EnableVisualStyles();
        Application.SetCompatibleTextRenderingDefault(false);
        Application.Run(form1 = new Form1());
    }
}

answered Jul 27, 2018 at 2:34

Make the function static. This must solve your problem.

I actually got this error because I was checking InnerHtml for some content that was generated dynamically — i.e. a control that is runat=server.

To solve this I had to remove the «static» keyword on my method, and it ran fine.

answered Jun 3, 2019 at 15:17

The essence, and solution, to your problem is this:

using System;

namespace myNameSpace
{
    class Program
    {
        private void method()
        {
            Console.WriteLine("Hello World!");
        }

        static void Main(string[] args)
        {
            method();//<-- Compile Time error because an instantiation of the Program class doesnt exist
            Program p = new Program();
            p.method();//Now it works. (You could also make method() static to get it to work)
        }
    }
}

answered May 2, 2021 at 0:05

Getting this error when I submit my form to savetext.aspx action file:

Compiler Error Message: CS0120: An object reference is required for the nonstatic field, method, or property 'System.Web.UI.Page.Request.get'

On this line:

string path = "/txtfiles/" + Request.Form["file_name"];

Whole code:

<%@ Page Language="C#" %>
<%@ Import Namespace="System" %>
<%@ Import Namespace="System.IO" %>

<script runat="server">

class Test 
{
    public static void Main() 
    {
        string path = "/txtfiles/" + Request.Form["file_name"];
        if (!File.Exists(path)) 
        {
            using (StreamWriter sw = File.CreateText(path)) 
            {
                sw.WriteLine(request.form["seatsArray"]);
            sw.WriteLine("");
            }   
        }

        using (StreamReader sr = File.OpenText(path)) 
        {
            string s = "";
            while ((s = sr.ReadLine()) != null) 
            {
                Console.WriteLine(s);
            }
        }
    }
}
</script>

How do I fix it?

Thanks!

asked Jul 14, 2010 at 14:48

Darin Dimitrov gave you a hint in right direction, but i want just to give answer to question why does this error happen. Normal error should be:

The name ‘Request’ does not exist in
the current context

This happen because for each aspx file a class is created that inherits from Page by default. All new classes defined inside aspx file become nested classes of that one. Request is member of class Page and this particular error happen because you try to access it from static method of nested type.

answered Jul 14, 2010 at 15:13