我在C＃中遇到连接问题 [英] I have a connection problem in C#

问题描述

我是一个由六人组成的大学项目组，我们正在使用C＃（使用Microsoft Visual Studio 2017作为IDE）制作一个可以管理啤酒生产系统的程序。

I有一个奇怪的问题，我不知道如何解决。每当我通过Visual Studio，尝试连接到任何类型的数据库或服务器时，我都会收到错误。



在我的项目组中，我们使用的是postgreSQL数据库，每当我尝试连接它时，我收到以下错误：

System.Net.SocketException（0x80004005）：没有这样的主机是已知的

在System.Net .Dns.GetAddrInfo（String name）

在System.Net.Dns.InternalGetHostByname（String hostName，Boolean includeIPv6）



没有其他人在我的项目组中收到此错误，并且我尝试在Visual Studio中运行的所有应用程序问题仍然存在。如前所述，问题出现的不仅仅是数据库。我甚至无法连接到从朋友电脑上运行的简单服务器。



我的笔记本电脑使用Windows 10作为操作系统。



我尝试了什么：



我试过在我的另一台电脑上安装Visual Studio（桌面，也是Windows 10），同样的问题也出现了。



我已经尝试谷歌搜索解决方案几个小时没有结果。



我试过在两个不同的网络上运行程序，所以我排除了网络问题。



我也几乎排除了端口作为一个问题。我已尝试进入高级防火墙设置，制定规则打开程序中使用的端口。我已经尝试更改程序中使用的端口。



我确保Visual Studio可以通过两台PC上的防火墙访问。

I am in a university project group of six people, and we are using C# (with Microsoft Visual Studio 2017 as IDE) to make a program, that can manage a beer production system.
I have a weird problem that i have no idea how to fix. Whenever I through Visual Studio, try to connect to a database or a server of any kind, I get an error.

In my project group, we are using a postgreSQL databse, and whenever I try connecting to it, I get the following error:
System.Net.SocketException (0x80004005): No such host is known
at System.Net.Dns.GetAddrInfo(String name)
at System.Net.Dns.InternalGetHostByname(String hostName, Boolean includeIPv6)

No one else in my project group gets this error, and the problem persists with all applications I try to run in Visual Studio. As mentioned it is not just with databases the problem occurs. I can't even connect to a simple server being run from a friends pc.

My laptop uses Windows 10 as OS.

What I have tried:

I have tried installing Visual Studio on my other computer (a desktop, also Windows 10), and the same problem occurs.

I have tried googling for solutions for hours without result.

I have tried running the program on two different networks, so I have ruled out the network as a problem.

I have also pretty much ruled out the port as a problem. I have tried going to the advanced firewall settings, making a rule opening the port used in the program. I have tried changing the port used in the program.

I have made sure that Visual Studio has access through the firewall on both pc's.

推荐答案

您好，



您提供的信息不够复杂。你指的是几个问题。让我们一步一步前进。按照我的解决方案并留下评论我将根据您的进度阅读并更改/改进解决方案，直到我们解决它。好？

首先，请使用CMD并ping localhost我希望你能像这样重播：

Hi,

The information that you provided is not enough and to complicated. You are referring to several problems. Let`s make progress step-by-step. Follow my solution and leave comments I will read and change/improve the solution according to your progress until we get it solve. Ok?
So first, please use CMD and ping localhost I expect you get replay like this:

Reply from 127.0.0.1: bytes=32 time<1ms TTL=128
Reply from 127.0.0.1: bytes=32 time<1ms TTL=128
Reply from 127.0.0.1: bytes=32 time<1ms TTL=128
Reply from 127.0.0.1: bytes=32 time<1ms TTL=128

2-确保你不要没有任何虚拟网卡，例如，如果您使用的是虚拟机，请尝试禁用其他适配器。

3-没有代理应该运行

4-将防火墙设置重置为默认值或者现在只需禁用它

5-确保你的防病毒不会与任何套接字/端口/接口大量接触

6-编写一个基于套接字的小应用程序，看看你是否能够启动并运行，非常简单。首先试试localhost然后去网络。

7-不要剪头发我们还有其他尝试只是发表评论。



顺便说一句，如果你想写评论请同时添加 ipconfig 的结果 - 如果你不是家人的话用 ipconfig 询问Mr.Google

祝你好运

AH

2- Make sure you don`t have any virtual NIC, for example if you are using virtual machine try to disable other adapters.
3- No proxy should be running
4- Reset your firewall settings to default or for now just disable it
5- Make sure your anti-virus does not mass up with any socket/port/interface
6- Write a small socket based application and see if you are able to make it up and running, something very simple. First try on localhost then go for network.
7- Do not cut your hairs we still do have some other tries just leave a comment.

Btw, if you wanted to write comment please also add results of ipconfig -all if you are not families with ipconfig ask Mr.Google
Good luck
AH

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