尝试从ASP.NET调用外部Web服务将返回401-DefaultCredentials空

失败：

作品：

//Note: webserviceProxy inherits from SoapHttpClientProtocol
//App Pool is running as a user with permissions to call the external webservice

var webserviceProxy = new webServiceProxy();

webserviceProxy.PreAuthenticate = true;
webserviceProxy.UseDefaultCredentials = true;

var returnVal = webServiceProxy.DoSomething();  //Fails with 401, webserviceProxy.Credendials shows an empty username, pass, and domain

如何使用ASP.NET应用程序池的标识进行外部webservice调用？似乎没有办法将

System.Security.Principal.WindowsIdentity.GetCurrent（）

转换为可用于此调用的内容

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谢谢

也许这篇Microsoft支持文章可以帮助您解决这个问题：

底线是，当计算机名和网站FQDN不匹配时，Windows将保护自己

另见：

//This code works, but I want to assign the current app pool's credentials to the webservice proxy's credentials.  UsingDefaultCredentials doesn't work.  The username, passoword, and domain are always null.

var webserviceProxy = new webServiceProxy();

webserviceProxy.PreAuthenticate = true;
webserviceProxy.Credentials = new NetworkCredential("user", "pass", "domain");

var returnVal = webServiceProxy.DoSomething();  //Fails with 401