如何显示阵列已满

你的循环设置为仅转到数组的大小，因此在逻辑上你可以展示在循环后的消息（这将让循环完成时命中）。

如果你控制一个while循环的数组访问那么你的索引i只是比较的阵列（patient_rec.Length）的长度，如果等于或超过，则长度显示信息。

我会做一个简单的方法：

enum Gender { female, male } 
    struct Record 
    { 
     public string _Name; 
     public int _Age; 
     public Gender _Gender; 
    } 
    static void Main(string[] args) 
    { 
     //title 
     Console.Write("\t\t\t\t\tPatient Records\n"); 
     IList<Record> patients = GetRecords(5); 
     SchedulePatients(patients); 
    } 
    static void SchedulePatients(IList<Record> patients) 
    { 
     Console.Write("a. Add\n d.Display\ns. Stats\nq. Quit"); 
     Console.Write("Your selection: "); 
     string selection = Console.ReadLine(); 
     switch (selection) 
     { 
      case "a": 
       patients.Add(GetRecord()); 
       SchedulePatients(patients); 
       break; 
      case "d": 
       break; 
      case "s": 
       Stats(patients); 
       break; 
      case "q": 
       //CUtility.Pause(); 
       break; 
     } 
    } 
    static IList<Record> GetRecords(int amount) 
    { 
     IList<Record> patients = new List<Record>(); 
     for (int i = 0; i < amount; i++) 
     { 
      patients.Add(GetRecord()); 
     } 
     return patients; 
    } 
    static Record GetRecord() 
    { 
     Record patient = new Record(); 
     Console.Write("Enter your age: "); 
     int.TryParse(Console.ReadLine(), out patient._Age); 
     Console.Write("Enter your name: "); 
     patient._Name = Console.ReadLine(); 
     Console.Write("Enter your gender (female or male): "); 
     Enum.TryParse(Console.ReadLine(), out patient._Gender); 
     return patient; 
    } 
    static void Stats(IList<Record> patients) 
    { 
     foreach (var patient in patients) 
     { 
      Console.WriteLine(string.Concat("Name: ", patient._Name, " Age: ", patient._Age, " Gender: ", patient._Gender)); 
     } 
     Console.ReadLine(); 
    } 
} 

如果您想满足的最小变化的要求可能，你只需要添加有关提示用户该位。

static void GetRecords(Record[] patient_rec) 
{ 
    for (int i = 0; i < patient_rec.Length; i++) 
    { 
     Console.Write("Enter your age: "); 
     int.TryParse(Console.ReadLine(), out patient_rec[i]._Age); 
     Console.Write("Enter your name: "); 
     patient_rec[i]._Name = Console.ReadLine(); 
     Console.Write("Enter your gender (female or male): "); 
     Gender.TryParse(Console.ReadLine(), out patient_rec[i]._Gender); 
     Console.Write("Enter another (Y/N)? "); 
     var s = Console.ReadLine(); 
     if (s.ToUpper() != "Y") return; 
    } 
    Console.WriteLine("You've entered the maximum number of records."); 
} 

我建议试着让你的代码更容易阅读 - 并且更健壮。

试试这个：

static void GetRecords(Record[] patient_rec) 
{ 
    for (int i = 0; i < patient_rec.Length; i++) 
    { 
     Console.WriteLine("Record {0} of {1} entry", i + 1, patient_rec.Length); 
     patient_rec[i] = new Record() 
     { 
      _Age = AskInteger("Enter your age: "), 
      _Name = AskString("Enter your name: "), 
      _Gender = AskGender("Enter your gender (female or male): "), 
     }; 
     string ask = ""; 
     while (string.IsNullOrEmpty(ask) || (ask.ToLower()[0] != 'y' && ask.ToLower()[0] != 'n')) 
     { 
      Console.WriteLine("Continue? yes or no (then hit enter)"); 
      ask = Console.ReadLine(); 
     } 
     if (ask.ToLower()[0] == 'y') 
     { 
      continue; 
     } 
     break; 
    } 
    Console.WriteLine("Thank you. Input completed."); 
} 

为了使这项工作，你需要这三个输入功能：

private static int AskInteger(string message) 
{ 
    int result; 
    Console.WriteLine(message); 
    string input = Console.ReadLine(); 
    while (!int.TryParse(input, out result)) 
    { 
     Console.WriteLine("Invalid input."); 
     Console.WriteLine(message); 
     input = Console.ReadLine(); 
    } 
    return result; 
} 
private static string AskString(string message) 
{ 
    Console.WriteLine(message); 
    string input = Console.ReadLine(); 
    while (string.IsNullOrWhiteSpace(input)) 
    { 
     Console.WriteLine("Invalid input."); 
     Console.WriteLine(message); 
     input = Console.ReadLine(); 
    } 
    return input; 
} 
private static Gender AskGender(string message) 
{ 
    Gender result; 
    Console.WriteLine(message); 
    string input = Console.ReadLine(); 
    while (!Gender.TryParse(input, out result)) 
    { 
     Console.WriteLine("Invalid input."); 
     Console.WriteLine(message); 
     input = Console.ReadLine(); 
    } 
    return result; 
}