https://files.cnblogs.com/files/shexunyu/%E5%9F%9F%E8%B4%A6%E6%88%B7%E5%AF%86%E7%A0%81%E7%99%BB%E5%BD%95%E9%AA%8C%E8%AF%81.zip
public class VerifyUserByDomain { public static bool verify(string userName, string pwd, string domain) { bool boolResult = false; try { //连接域,path通常是:"LDAP://****";****为域的名字(一般是大写的英文字符串) DirectoryEntry dirEntry = new DirectoryEntry("LDAP://" + domain, userName, pwd); //string strFilter = "(&(objectCategory=person)(objectClass=user))"; string strFilter = string.Format("(&(objectClass=user)(samAccountName={0}))", userName); DirectorySearcher objSearcher = new DirectorySearcher(dirEntry, strFilter); SearchResult result = objSearcher.FindOne(); boolResult = true; } catch (Exception ex) { throw ex; } return boolResult; } }