c#-System.DirectoryServices.DirectoryServicesCOMException：发生操作错误.

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我正在尝试从在本地Intranet上提交ASP.NET表单的用户获取电子邮件地址.在我的本地计算机上测试时,它可以正常工作.但是,当我发布并开始在生产环境中对其进行测试时,它并不喜欢第74行.

Server Error in '/' Application.
--------------------------------------------------------------------------------

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



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

此代码块仅出于测试目的而在我的页面加载中,因此可以立即获得结果….但是它永远不会在生产环境中加载页面,但在本地计算机上的VS中调试时效果很好…

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();
            }
        }

解决方法:

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();
                    }
                }

            }

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