我有一个在IIS 7的服务器上运行，在这个节目，我需要找到所有当前用户是其成员组的应用程序。当我使用浏览器访问该网站的服务器上，它完美的作品，但是当我试图从我的机器访问它，它不断抛出COM异常，这里是code我用得到的用户群体。
私人列表＆LT;串GT; GetUserGroups（用户名字符串） { //对于输出字符串的列表。 清单＆LT;串GT;输出=新的List＆LT;串GT;（）; 尝试 { //在使用块，便于处置创建PrincipalContext对象 使用（PrincipalContext域=新PrincipalContext（ContextType.Domain，域）） //使用（用户的WindowsIdentity = WindowsIdentity.GetCurrent（）） { //通过查找用户创建从一个PrincipalContext的UserPrincipal //传递给函数这是一个不断抛出异常的行。 使用（UserPrincipal用户= UserPrincipal.FindByIdentity（域，IdentityType.SamAccountName，用户名）） { //检查以确保用户被发现。 如果（用户！= NULL） { //获取用户组的集合变量称为组 PrincipalSearchResult＆LT;主＆GT;基团= UserPrincipal.Current.GetAuthorizationGroups（）; // IdentityReferenceCollection组= user.Groups; //这个foreach循环经过每个结果的收集组 的foreach（在组首席P） { //检查结果是GroupPrincipal对象，不为null 如果（p是GroupPrincipal＆放大器;＆安培; p.ToString（）！= NULL） { output.Add（p.ToString（））; //将字符串值添加到输出列表。 debugString + =＆LT; BR /＆gt;中+ p.ToString（）; } } } } } } 赶上（异常前） { processLog.Text + = ex.ToString（）+ ex.GetType（）; } //返回组的用户是其成员的列表。 返回输出; }为什么会抛出异常，当我从服务器以外的地方访问它？我怎样才能解决这个问题？
更新：这里是堆栈跟踪例外，所有的
System.Runtime.InteropServices.COMException（0x80072020）：一个 发生操作错误。在 System.DirectoryServices.DirectoryEntry.Bind（布尔throwIfFail）在 System.DirectoryServices.DirectoryEntry.Bind（）在 System.DirectoryServices.DirectoryEntry.get_AdsObject（）在 System.DirectoryServices.PropertyValueCollection.PopulateList（）在 System.DirectoryServices.PropertyValueCollection..ctor（的DirectoryEntry 进入，字符串propertyName的）在 System.DirectoryServices.PropertyCollection.get_Item（字符串 propertyName的）在 System.DirectoryServices.AccountManagement.PrincipalContext.DoLDAPDirectoryInitNoContainer（） 在 System.DirectoryServices.AccountManagement.PrincipalContext.DoDomainInit（） 在 System.DirectoryServices.AccountManagement.PrincipalContext.Initialize（） 在 System.DirectoryServices.AccountManagement.PrincipalContext.get_QueryCtx（） 在 System.DirectoryServices.AccountManagement.Principal.FindByIdentityWithTypeHelper（PrincipalContext 背景，类型principalType，Nullable`1 identityType，字符串 identityValue，日期时间refDate）在 System.DirectoryServices.AccountManagement.Principal.FindByIdentityWithType（PrincipalContext 背景，类型principalType，IdentityType identityType，字符串 identityValue）在 System.DirectoryServices.AccountManagement.UserPrincipal.FindByIdentity（PrincipalContext 背景下，IdentityType identityType，字符串identityValue）在 ResetUnlockAccount.ResetUnlockAccount.GetUserGroups（用户名字符串） 在 C：\\ ResetUnlockAccount \\ ResetUnlockAccount \\ ResetUnlockAccount.aspx.cs：行 894
解决方案％的OP的评论，
答案在这里找到： GroupPrincipal方法FindByIdentity抛出异常诡异
只是不得不添加使用System.Web.Hosting; 和 使用（HostingEnvironment.Impersonate（））在首先使用在 原来的code。
I have an application that is running on an IIS 7 server, in this program I need to find all the groups that the current user is a member of. When I access the website using the browser on the server, it works perfectly, but when I try to access it from my machine it keeps throwing a COM exception, Here is the code I'm using to get the user groups.
private List<string> GetUserGroups(string userName) { //The list of strings for output. List<string> output= new List<string>(); try { //creating a PrincipalContext object in a using block for easy disposal using(PrincipalContext domain = new PrincipalContext(ContextType.Domain,"domain")) //using(WindowsIdentity user = WindowsIdentity.GetCurrent()) { //Creating a UserPrincipal from the PrincipalContext by finding the user that //was passed to the function This is the line that keeps throwing the exception. using (UserPrincipal user = UserPrincipal.FindByIdentity(domain,IdentityType.SamAccountName,userName)) { //Checking to make sure the user was found. if (user != null) { //Getting the users groups in a collection variable called groups PrincipalSearchResult<Principal> groups = UserPrincipal.Current.GetAuthorizationGroups(); //IdentityReferenceCollection groups = user.Groups; //This foreach loop goes through each result in the groups collection foreach (Principal p in groups) { //check the result is a GroupPrincipal object and is not null if (p is GroupPrincipal && p.ToString() != null) { output.Add(p.ToString());//Add the string value to the output list. debugString += "<br/>"+p.ToString(); } } } } } } catch (Exception ex) { processLog.Text += ex.ToString()+ ex.GetType(); } //return the list of groups the user is a member of. return output; }Why does it throw the exception when I access it from a location other than the server? How can I fix it?
Update: Here is the stacktrace exception and all
System.Runtime.InteropServices.COMException (0x80072020): An operations error occurred. at System.DirectoryServices.DirectoryEntry.Bind(Boolean throwIfFail) at System.DirectoryServices.DirectoryEntry.Bind() at System.DirectoryServices.DirectoryEntry.get_AdsObject() at System.DirectoryServices.PropertyValueCollection.PopulateList() at System.DirectoryServices.PropertyValueCollection..ctor(DirectoryEntry entry, String propertyName) at System.DirectoryServices.PropertyCollection.get_Item(String propertyName) at System.DirectoryServices.AccountManagement.PrincipalContext.DoLDAPDirectoryInitNoContainer() at System.DirectoryServices.AccountManagement.PrincipalContext.DoDomainInit() at System.DirectoryServices.AccountManagement.PrincipalContext.Initialize() at System.DirectoryServices.AccountManagement.PrincipalContext.get_QueryCtx() at System.DirectoryServices.AccountManagement.Principal.FindByIdentityWithTypeHelper(PrincipalContext context, Type principalType, Nullable`1 identityType, String identityValue, DateTime refDate) at System.DirectoryServices.AccountManagement.Principal.FindByIdentityWithType(PrincipalContext context, Type principalType, IdentityType identityType, String identityValue) at System.DirectoryServices.AccountManagement.UserPrincipal.FindByIdentity(PrincipalContext context, IdentityType identityType, String identityValue) at ResetUnlockAccount.ResetUnlockAccount.GetUserGroups(String userName) in C:\ResetUnlockAccount\ResetUnlockAccount\ResetUnlockAccount.aspx.cs:line 894
解决方案
Per the OP's comment,
The answer was found here: GroupPrincipal method FindByIdentity throw strange exception
Just had to add using System.Web.Hosting; and using(HostingEnvironment.Impersonate()) over the first using in the original code.
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