如何按名字和姓氏排序,然后按SamAccountName排序,其中并非所有名称都有第一个和最后一个？

Question

目前,我有以下,从LDAP拉.

// Get context, based on currently logged on user
PrincipalContext domainContext = new PrincipalContext(ContextType.Domain, Environment.UserDomainName);
// Search for the "Domain Users" group, with domain context
GroupPrincipal group = GroupPrincipal.FindByIdentity(domainContext, IdentityType.SamAccountName, "Domain Users");
if(group != null) {
    List<Principal> members = null;
    members = group.GetMembers(false)
        .OrderBy(principal => principal.Name).ToList();
        List<Principal> Principals = members
        .OrderBy(a => a.Name.Split(',')[0])
        .ThenBy(a => a.Name.Split(',')[1])
        .ThenBy(a => a.SamAccountName).ToList();
}

我遇到的问题是,如果我有Doe,John它工作正常,但如果我有Admin01,它会崩溃,因为它找不到第二部分.如何更改它,如果它只有一个单词,它也会起作用？

Answer 1

首先,我会将它投影到复合类型,以便您不会反复拆分.然后我会用？:运营商.然后投射回去获得原始类型.

members
  .Select( m => new { member = m, split = m.Name.Split(',') } )
  .OrderBy( a => a.split[0] )
  .ThenBy( a => a.split.Count() > 1 ? a.split[1] : string.Empty )
  .ThenBy( a => a.member.SamAccountNamr )
  .Select( a => a.member );