如何使用三个参数创建hashTable？我想使用hashTable和字典存储电话号码,姓名和地址.电话号码作为密钥,名称,地址作为其值.但我只能输入两个数据,电话号码和姓名.如何在hashTable中保存电话号码,姓名,地址？
Hashtable phoneBook;
public FrmPhoneBook()
{
InitializeComponent();
phoneBook = new Hashtable();
}
public void addNewPhoneBook(string name,string tel,string add)
{
string names = name;
string telp = tel;
string address = add;
if (!phoneBook.ContainsKey(telp))
{
phoneBook.Add(telp,names);
getDetails();
}
}
public void getDetails()
{
lvDetails.Items.Clear();
foreach (DictionaryEntry values in phoneBook)
{
lvDetails.Items.Add(values.Value.ToString());
lvDetails.Items[lvDetails.Items.Count - 1].SubItems.Add(
values.Key.ToString());
}
}
解决方法
将所有用户数据放入一个类：
public class User
{
public string Name { get; set; }
public string Address { get; set; }
public string PhoneNumber { get; set; }
}
然后处理如下：
Dictionary<string,User> reverseLookUp = new Dictionary<string,User>();
User user;
// Fill dictionary
user = new User { Name = "John",Address = "Baker Street",PhoneNumber = "012345" };
reverseLookUp.Add(user.PhoneNumber,user);
user = new User { Name = "Sue",Address = "Wall Street",PhoneNumber = "333777" };
reverseLookUp.Add(user.PhoneNumber,user);
// Search a user
string phoneNumber = "012345";
if (reverseLookUp.TryGetValue(phoneNumber,out user)) {
Console.WriteLine("{0},{1},phone {2}",user.Name,user.Address,user.PhoneNumber);
} else {
Console.WriteLine("User with phone number {0} not found!",phoneNumber);
}
// List all users
foreach (User u in reverseLookUp.Values) {
Console.WriteLine("{0},u.Name,u.Address,u.PhoneNumber);
}
您还可以为此目的创建专用字典：
public class PhoneDict : Dictionary<string,User>
{
public void Add(User user)
{
Add(user.PhoneNumber,user);
}
}
PhoneDict phoneDict = new PhoneDict();
User user;
// Fill dictionary
user = new User { Name = "John",PhoneNumber = "012345" };
phoneDict.Add(user);
user = new User { Name = "Sue",PhoneNumber = "333777" };
phoneDict.Add(user);
