C# System.DirectoryServices.DirectoryServicesCOMException:发生操作错误。

我正在尝试从正在本地intranet上提交ASP.NET表单的用户处获取电子邮件地址。在我的本地机器上测试时，它工作正常。但当我发布并开始在生产中测试它时，它不喜欢第74行

Server Error in '/' Application.
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An operations error occurred.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.DirectoryServices.DirectoryServicesCOMException: An operations error occurred.


Source Error: 


Line 71:         adSearcher.SearchScope = SearchScope.Subtree;
Line 72:         adSearcher.Filter = "(&(objectClass=user)(samaccountname=" + userInQuestion + "))";
Line 73:         SearchResult userObject = adSearcher.FindOne();
Line 74:         if (userObject != null) 
Line 75:         { 

Source File: c:\Web\Support-t\Content\Default.aspx.cs    Line: 73 

Stack Trace: 


[DirectoryServicesCOMException (0x80072020): An operations error occurred.
]
   System.DirectoryServices.DirectoryEntry.Bind(Boolean throwIfFail) +628309
   System.DirectoryServices.DirectoryEntry.Bind() +44
   System.DirectoryServices.DirectoryEntry.get_AdsObject() +42
   System.DirectoryServices.DirectorySearcher.FindAll(Boolean findMoreThanOne) +98
   System.DirectoryServices.DirectorySearcher.FindOne() +44
   _Default.Page_Load(Object sender, EventArgs e) in c:\Web\Support-t\Content\Default.aspx.cs:73
   System.Web.UI.Control.LoadRecursive() +71
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3178



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Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.18033 

这段代码在我的页面加载中只是为了测试目的，所以in可以立即得到结果…但它永远不会在生产中加载页面，但在本地机器上的VS中调试时工作正常

IIdentity id = WindowsIdentity.GetCurrent();
        WindowsIdentity winId = id as WindowsIdentity;

        if (id == null) 
        {
            txtDetailedProblem.Text = "Identity is not a windows identity";
            return;
        }

        string userInQuestion = winId.Name.Split('\\')[1];
        string myDomain = winId.Name.Split('\\')[0]; // this is the domain that the user is in
        // the account that this program runs in should be authenticated in there                    
        DirectoryEntry entry = new DirectoryEntry("LDAP://" + myDomain);
        DirectorySearcher adSearcher = new DirectorySearcher(entry);

        adSearcher.SearchScope = SearchScope.Subtree;
        adSearcher.Filter = "(&(objectClass=user)(samaccountname=" + userInQuestion + "))";
        SearchResult userObject = adSearcher.FindOne();
        if (userObject != null) 
        {
            string[] props = new string[] {"mail"};
            foreach (string prop in props) 
            {
                txtTEST.Text = prop.ToString() + " " + userObject.Properties[prop][0].ToString();
            }
        }

---

我假设您有权访问生产Web服务器上标识不存在的广告。在生产Web服务器的apppool中配置了哪个标识？的可能重复项

IIdentity id = WindowsIdentity.GetCurrent();
            WindowsIdentity winId = id as WindowsIdentity;

            if (id == null)
            {
                CurrentUserEmail = "identity is not a windows identity";
                return;
            }

            var name = winId.Name;

            string userInQuestion = name.Split('\\')[1];
            string myDomain = name.Split('\\')[0]; // this is the domain that the user is in
            // the account that this program runs in should be authenticated in there                    

            using (HostingEnvironment.Impersonate())
            {
                DirectoryEntry entry = new DirectoryEntry("LDAP://" + myDomain);
                DirectorySearcher adSearcher = new DirectorySearcher(entry);

                adSearcher.SearchScope = SearchScope.Subtree;
                adSearcher.Filter = "(&(objectClass=user)(samaccountname=" + userInQuestion + "))";
                SearchResult userObject = adSearcher.FindOne();
                if (userObject != null)
                {
                    string[] props = new string[] {"mail"};
                    foreach (string prop in props)
                    {   //when it works set variable to CurrentUserEmail instead of txtDetailPrblem textbox
                        CurrentUserEmail = userObject.Properties[prop][0].ToString();
                    }
                }

            }