Question

How can I fetch all the record from my Active Directory Server in asp.net c#?

Answer 1

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

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();

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