请求因 HTTP 状态 401 失败: Unauthorized
如题，调用web Service的时候报错。把IIS里的允许匿名访问打钩也不行。哪位帮忙解决一下？

[解决办法]

C# code

IRSpiderWS.SaveSpiderData saveSpider = new IRSpiderWS.SaveSpiderData();            saveSpider.Url = System.Configuration.ConfigurationSettings.AppSettings["IRSpiderWS"];//如下是设置系统认证            saveSpider.Credentials = System.Net.CredentialCache.DefaultCredentials;