编译时错误 "The name 'pubnub' does not exist in the current context"

Question

我还没有在 C# 中使用 .net in years and when I did it was vb.net. I'm trying to set up a simple pubnub 概念证明，我真的很挣扎。我创建了一个新的表单应用程序（我希望能够使用按钮控制提要，start/stop/etc）。然后我打开 program.cs，它给了我以下代码：

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

    namespace feedtest
    {
        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());
            }

        }
    }

我已经安装了 pubnub using nuget package manager and I've added the using reference, but that's where things go sour. The first step in the documentation says to "initialize the API" 使用以下行：

Pubnub pubnub = new Pubnub("demo", "demo");

我终于想通了，我把它放在了 Static Void Main() 中，但现在我好像掉进了兔子洞。在修改了文档中的一些内容并忽略其他内容之后，我处于以下几点：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;
using PubNubMessaging.Core;

namespace feedtest
{
    static class Program
    {
        private static string result;

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

            Pubnub pubnub = new Pubnub("demo", "demo");

            pubnub.Subscribe<string>(
               "my_channel",
                DisplaySubscribeReturnMessage,
                DisplaySubscribeConnectStatusMessage,
                DisplayErrorMessage
            );


        }

        static void DisplayErrorMessage(PubnubClientError obj)
        {
            throw new NotImplementedException();
        }

        static void DisplaySubscribeConnectStatusMessage(string obj)
        {
            throw new NotImplementedException();
        }

        static void DisplaySubscribeReturnMessage(string obj)
        {
            Console.WriteLine("SUBSCRIBE REGULAR CALLBACK:");
            Console.WriteLine(result);
            if (!string.IsNullOrEmpty(result) && !string.IsNullOrEmpty(result.Trim()))
            {
                List<object> deserializedMessage = pubnub.JsonPluggableLibrary.DeserializeToListOfObject(result);
                if (deserializedMessage != null && deserializedMessage.Count > 0)
                {
                    object subscribedObject = (object)deserializedMessage[0];
                    if (subscribedObject != null)
                    {
                        //IF CUSTOM OBJECT IS EXCEPTED, YOU CAN CAST THIS OBJECT TO YOUR CUSTOM CLASS TYPE
                        string resultActualMessage = pubnub.JsonPluggableLibrary.SerializeToJsonString(subscribedObject);
                    }
                }
            }
        }
    }

}

当前错误是

The name 'pubnub' does not exist in the current context

我该如何解决这个错误？我是不是该？我什至接近？我选错起点了吗？有谁知道任何好的简单、pubnub 教程？

Answer 1

pubnub 超出了您尝试使用它的范围。像你一样将它用作局部变量，你需要在你使用它的相同方法中声明它。

如果你想在两种方法中使用相同的pubnub，那么你需要将它放在其他地方或传递它。可能在您的程序中将其声明为静态字段。

private static Pubnub pubnub = new Pubnub("demo", "demo");

编译时错误 "The name 'pubnub' does not exist in the current context"

Compile time error "The name 'pubnub' does not exist in the current context"

.net

c#

pubnub