避免在foreach中打印某些行

Question

嗨我想避免在我的foreach循环（在GetSAM中）打印某些行（有效帐户），而不是打印所有内容。

当我尝试通过注销打印有效帐户的行（在valSAM中）这样做时，在有效帐户曾经存在的区域中将是空白的。我知道这是因为foreach遍历数据库中的所有变量。

我怎样才能消除输出之间的差距？

GetSAM：

//Get SAMAccount 
    private static string GetSAM(string ldapAddress, string serviceAccountUserName, string serviceAccountPassword) 
    { 
     string ldapPath = "LDAP://" + ldapAddress; 
     string ldapFilter = "(&(objectclass=user)(objectcategory=person))"; 
     DirectoryEntry directoryEntry = new DirectoryEntry(ldapPath, serviceAccountUserName, serviceAccountPassword); 
     string readOutput; 
     List<string> list = new List<string>(); 
     List<int> invalid = new List<int>(); 
     using (DirectorySearcher directorySearcher = new DirectorySearcher(directoryEntry)) 
     { 
      string samAccountName; 
      directorySearcher.Filter = ldapFilter; 
      directorySearcher.SearchScope = SearchScope.Subtree; 
      directorySearcher.PageSize = 1000; 
      using (SearchResultCollection searchResultCollection = directorySearcher.FindAll()) 
      { 
       **foreach (SearchResult result in searchResultCollection) 
       { 
        samAccountName = result.Properties["sAMAccountName"][0].ToString(); 
        if (valSAM(samAccountName, ldapAddress, serviceAccountUserName, serviceAccountPassword)!= true) 
        { 
         invalid.Add('1'); 
        } 
        list.Add(samAccountName); 
       } //end of foreach** 
       // Count all accounts 
       int totalAccounts = list.Count; 
       // Count all invalid accounts 
       int invalidAccounts = invalid.Count; 
       Console.WriteLine("Found " + invalidAccounts + " invalid accounts out of " + totalAccounts + " user accounts.\nQuery in " + ldapAddress + " has finished.\n"); 
       Console.WriteLine("Press [enter] to continue.\n"); 
       readOutput = Console.ReadLine(); 
      }//SearchResultCollection will be disposed here 
     } 
     return readOutput; 
    } 

valSAM：

//Validate SAMAccount 
    private static bool valSAM(string samAccountName, string ldapAddress, string serviceAccountUserName, string serviceAccountPassword) 
    { 
     string ldapPath = "LDAP://" + ldapAddress; 
     DirectoryEntry directoryEntry = new DirectoryEntry(ldapPath, serviceAccountUserName, serviceAccountPassword); 
     StringBuilder builder = new StringBuilder(); 
     bool accountValidation = false; 
     //create instance fo the directory searcher 
     DirectorySearcher desearch = new DirectorySearcher(directoryEntry); 
     //set the search filter 
     desearch.Filter = "(&(sAMAccountName=" + samAccountName + ")(objectcategory=user))"; 
     //find the first instance 
     SearchResult results = desearch.FindOne(); 
     using (PrincipalContext pc = new PrincipalContext(ContextType.Domain, ldapAddress)) 
     { 
      //if users are present in database 
      if (results != null) 
      { 
       //Check if account is activated 
       bool isAccountActived = IsActive(results.GetDirectoryEntry()); 
       //Check if account is expired or locked 
       bool isAccountLocked = IsAccountLockOrExpired(results.GetDirectoryEntry()); 
       accountValidation = ((isAccountActived != true) || (isAccountLocked)); 
       //account is invalid 
       if (accountValidation) 
       { 
        builder.Append("User account " + samAccountName + " is invalid. "); 
        if ((isAccountActived != true) && (isAccountLocked)) 
        { 
         builder.Append("Account is inactive and locked or expired.").Append('\n'); ; 
        } else if (isAccountActived != true) 
        { 
         builder.Append("Account is inactive.").Append('\n'); ; 
        } 
        else if (isAccountLocked) 
        { 
         builder.Append("Account is locked or has expired.").Append('\n'); ; 
        } 
        else 
        { 
         builder.Append("Unknown reason for status. Contact admin for help.").Append('\n'); ; 
        } 
        accountValidation = false; 
       } 
       //account is valid 
       if ((isAccountActived) && (isAccountLocked != true)) 
       { 
       **//builder.Append("User account " + samAccountName + " is valid.").Append('\n'); 
        accountValidation = true; 
       } 
      } 
      else Console.WriteLine("Nothing found."); 
      Console.WriteLine(builder); 
     }//end of using 
     return accountValidation; 
    } 

Answer 1

你可能想，如果制造商拥有的东西，否则它会打印一个空行只写。也就是说，如果你要处理所有的新生产线的建造者本身改变

Console.WriteLine(builder); 

到

if (builder.Length > 0) 
{ 
    Console.WriteLine(builder); 
} 

或只是

Console.Write(builder); 

。如果你打算这样做，请使用StringBuilder.AppendLine（），而不是像那样对'\ n'进行硬编码。

• StringBuilder.AppendLine https://msdn.microsoft.com/en-us/library/system.text.stringbuilder.appendline(v=vs.110).aspx