我们如何检查用户标识是否存在于Active Directory或没有。

How can we check whether the USERID exists in Active Directory or not.

我有LDAP字符串和用户名，我可以发现，用户名是否存在于Active Directory或不。我用这对ASP.NET Web应用程序（.NET 3.5）

I have LDAP String and UserID, can I find whether that UserID exists in Active Directory or not. I am using this for ASP.NET Web Application (.NET 3.5)

推荐答案

您可以做沿（与你验证对域替代域或完全移除参数）线的东西：

You can do something along the lines of (replacing domain with the domain you're authenticating against or removing the parameter altogether):

public bool DoesUserExist(string userName)
{
    using (var domainContext = new PrincipalContext(ContextType.Domain, "DOMAIN"))
    {
        using (var foundUser = UserPrincipal.FindByIdentity(domainContext, IdentityType.SamAccountName, userName))
        {
            return foundUser != null;
        }
    }
}

要实现检查，如果用户存在。这个来自 System.DirectoryServices.AccountManagement 命名空间和组件。

To achieve checking for if a user exists. This comes from the System.DirectoryServices.AccountManagement namespace and assembly.

您可以找到http://msdn.microsoft.com/en-us/library/system.directoryservices.accountmanagement.aspx

您可能要检查更进PrincipalContext因为它有趣的方法来验证用户凭据和这样的。

You may want to check more into PrincipalContext as it has interesting methods for authenticating user credentials and such.