C# IIS错误“；无法强制转换类型为'；System.DirectoryServices.AccountManagement.GroupPrincipal'&引用；

示例代码：

staffName.Text = UserPrincipal.Current.Name;

Unable to cast object of type 'System.DirectoryServices.AccountManagement.GroupPrincipal' to type 'System.DirectoryServices.AccountManagement.UserPrincipal'.

[InvalidCastException: Unable to cast object of type 'System.DirectoryServices.AccountManagement.GroupPrincipal' to type 'System.DirectoryServices.AccountManagement.UserPrincipal'.]
   System.DirectoryServices.AccountManagement.UserPrincipal.FindByIdentity(PrincipalContext context, IdentityType identityType, String identityValue) +57
   System.DirectoryServices.AccountManagement.UserPrincipal.get_Current() +218
   Appraisal.Staffmain.Page_Load(Object sender, EventArgs e) +121
   System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
   System.Web.UI.Control.OnLoad(EventArgs e) +91
   System.Web.UI.Control.LoadRecursive() +74
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2207

您好，我从vs2010将项目发布到IIS时出现此错误。有人能帮我吗，即使我尝试删除代码和引用，我仍然会遇到这个错误（这很奇怪）

错误：

staffName.Text = UserPrincipal.Current.Name;

Unable to cast object of type 'System.DirectoryServices.AccountManagement.GroupPrincipal' to type 'System.DirectoryServices.AccountManagement.UserPrincipal'.

[InvalidCastException: Unable to cast object of type 'System.DirectoryServices.AccountManagement.GroupPrincipal' to type 'System.DirectoryServices.AccountManagement.UserPrincipal'.]
   System.DirectoryServices.AccountManagement.UserPrincipal.FindByIdentity(PrincipalContext context, IdentityType identityType, String identityValue) +57
   System.DirectoryServices.AccountManagement.UserPrincipal.get_Current() +218
   Appraisal.Staffmain.Page_Load(Object sender, EventArgs e) +121
   System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
   System.Web.UI.Control.OnLoad(EventArgs e) +91
   System.Web.UI.Control.LoadRecursive() +74
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2207

堆栈跟踪：

staffName.Text = UserPrincipal.Current.Name;

Unable to cast object of type 'System.DirectoryServices.AccountManagement.GroupPrincipal' to type 'System.DirectoryServices.AccountManagement.UserPrincipal'.

[InvalidCastException: Unable to cast object of type 'System.DirectoryServices.AccountManagement.GroupPrincipal' to type 'System.DirectoryServices.AccountManagement.UserPrincipal'.]
   System.DirectoryServices.AccountManagement.UserPrincipal.FindByIdentity(PrincipalContext context, IdentityType identityType, String identityValue) +57
   System.DirectoryServices.AccountManagement.UserPrincipal.get_Current() +218
   Appraisal.Staffmain.Page_Load(Object sender, EventArgs e) +121
   System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
   System.Web.UI.Control.OnLoad(EventArgs e) +91
   System.Web.UI.Control.LoadRecursive() +74
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2207

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我会将此切换为使用HttpContext.Current.User.Identity.Name属性

staffName.Text = HttpContext.Current.User.Identity.Name;

---

这将为您提供web应用程序的当前用户

我会将此切换为使用HttpContext.Current.User.Identity.Name属性

staffName.Text = HttpContext.Current.User.Identity.Name;

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这将为您提供web应用程序的当前用户

很好！它设法跑过，但什么也不显示。（如“”）必须通过身份验证方法设置当前用户。如果你是匿名登录，我相信它将是空白的。我得到了上面的空白。很好！它设法跑过，但什么也不显示。（如“”）必须通过身份验证方法设置当前用户。如果你是匿名登录，我相信它将是空白的。我得到了上面的空白。