C#：如何以编程方式检查 Web 服务是否已启动并正在运行？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/12094024/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
C#: How to programmatically check a web service is up and running?
提问by LCJ
I need to create an C# application that will monitor whether a set of web services are up and running. User will select a service name from a dropdown. The program need to test with the corresponding service URL and show whether the service is running. What is the best way to do it? One way I am thinking of is to test whether we are able to download the wsdl. IS there a better way?
我需要创建一个 C# 应用程序来监视一组 Web 服务是否已启动并正在运行。用户将从下拉列表中选择一个服务名称。程序需要用对应的服务 URL 进行测试，并显示服务是否正在运行。最好的方法是什么？我想到的一种方法是测试我们是否能够下载 wsdl。有没有更好的办法？
Note: The purpose of this application is that the user need to know only the service name. He need not remember/store the corresponding URL of the service.
注意：此应用程序的目的是用户只需要知道服务名称。他不需要记住/存储服务的相应 URL。
I need a website version and a desktop application version of this C# application.
我需要这个 C# 应用程序的网站版本和桌面应用程序版本。
Note: Existing services are using WCF. But in future a non-WCF service may get added.
注意：现有服务使用 WCF。但将来可能会添加非 WCF 服务。
Note: My program will not be aware of (or not interested in ) operations in the service. So I cannot call a service operation.
注意：我的程序不会知道（或不感兴趣）服务中的操作。所以我不能调用服务操作。
REFERENCE
参考
采纳答案by paul
this would not guarantee functionality, but at least you could check connectivity to a URL:
这不能保证功能，但至少您可以检查与 URL 的连接：
var url = "http://url.to.che.ck/serviceEndpoint.svc";
try
{
var myRequest = (HttpWebRequest)WebRequest.Create(url);
var response = (HttpWebResponse)myRequest.GetResponse();
if (response.StatusCode == HttpStatusCode.OK)
{
// it's at least in some way responsive
// but may be internally broken
// as you could find out if you called one of the methods for real
Debug.Write(string.Format("{0} Available", url));
}
else
{
// well, at least it returned...
Debug.Write(string.Format("{0} Returned, but with status: {1}",
url, response.StatusDescription));
}
}
catch (Exception ex)
{
// not available at all, for some reason
Debug.Write(string.Format("{0} unavailable: {1}", url, ex.Message));
}
回答by Victor
I may be too late with the answer but this approach works for me. I used Socket to check if the process can connect. HttpWebRequest works if you try to check the connection 1-3 times but if you have a process which will run 24hours and from time to time needs to check the webserver availability that will not work anymore because will throw TimeOut Exception.
我的答案可能为时已晚，但这种方法对我有用。我使用 Socket 来检查进程是否可以连接。如果您尝试检查连接 1-3 次，则 HttpWebRequest 可以工作，但是如果您有一个 24 小时运行的进程，并且需要不时检查网络服务器的可用性，该可用性将不再起作用，因为会抛出 TimeOut 异常。
Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
var result = socket.BeginConnect("xxx.com", 80, null, null);
bool success = result.AsyncWaitHandle.WaitOne(3000,false); // test the connection for 3 seconds
var resturnVal = socket.Connected;
if (socket.Connected)
socket.Disconnect(true);
socket.Dispose();
return resturnVal;
