在 LDAP 中建立连接字符串，提供用户名和密码，与服务器通信并具有管理员权限.

Make a connection string in LDAP providing username and Password which can communicate with the server and have Administrator rights.

假定DC为 me.com ，并且用户名和密码是具有管理员权限.

Suppose DC is me.com and username and password are the password of that user Id which is having Administrator rights.

   DirectoryEntry rootDSE = rootDSE = new DirectoryEntry("LDAP://OU="",OU=" ",dc="me",dc=com", username, password);

    DirectorySearcher search = new DirectorySearcher(rootDSE);

    search.PageSize = 1001;// To Pull up more than 100 records.

     search.Filter = "(&(objectClass=user)(!userAccountControl:1.2.840.113556.1.4.803:=2))";//UserAccountControl will only Include Non-Disabled Users.
      SearchResultCollection result = search.FindAll();

         foreach (SearchResult item in result)
        {
            if (item.Properties["cn"].Count > 0)
            {
                DisplayName = item.Properties["cn"][0].ToString();
            }
            if (item.Properties["mail"].Count > 0)
            {
                EmailAddress = item.Properties["mail"][0].ToString();
            }
            if (item.Properties["SamAccountName"].Count > 0)
            {
                DomainName = item.Properties["SamAccountName"][0].ToString();
            }
            if (item.Properties["department"].Count > 0)
            {
                Department = item.Properties["department"][0].ToString();
            }
            if (item.Properties["title"].Count > 0)
            {
                title = item.Properties["title"][0].ToString();
            }
            if (item.Properties["company"].Count > 0)
            {
                company = item.Properties["company"][0].ToString();
            }
            if (item.Properties["DistinguishedName"].Count > 0)
            {
                memberof = item.Properties["DistinguishedName"][0].ToString();
            }
            if (item.Properties["AccountExpirationDate"].Count > 0)
            {
                string aaa = item.Properties["AccountExpirationDate"][0].ToString();
            }

              dt.Rows.Add(DisplayName, EmailAddress, DomainName, Department, title, company, memberof);
             DisplayName = string.Empty;
             EmailAddress = string.Empty;
             DomainName = string.Empty;
             Department = string.Empty;
             title = string.Empty;
             company = string.Empty;
             memberof = string.Empty;

               rootDSE.Dispose();

通过这种方式，我们可以从域服务器中提取所有记录.

In this way we can Pull up all the records from our Domain Server.