Question

我有以下代码：

static void Main(string[] args)
{
    // Add 5 Employees to a Dictionary.
    var Employees = new Dictionary<int, Employee>();
    Employees.Add(1, new Employee(1, "John"));
    Employees.Add(2, new Employee(2, "Henry"));
    Employees.Add(3, new Employee(3, "Jason"));
    Employees.Add(4, new Employee(4, "Ron"));
    Employees.Add(5, new Employee(5, "Yan"));
}

有一种简单的方法可以像Java一样轻松地打印字典的值吗？例如，我希望能够打印如下内容：

拥有密钥1的员工：Id = 1，Name = John

拥有密钥2的员工：Id = 2，Name = Henry

..等..

谢谢。

抱歉，我习惯了Java！

Answer 1

您可以使用foreach语句：

foreach(var pair in Employees)
{
    Console.WriteLine($"Employee with key {pair.Key}: Id={pair.Value.Id} Name={pair.Value.Name}");
}

Answer 2

您可以使用foreach循环打印Dictionary中的所有值。

foreach(var employe in Employees) {
    Console.WriteLine(string.Format("Employee with key {0}: Id={1}, Name= {2}",employe.Key, employe.Value.Id, employe.Value.Name ));
}

Answer 3

尝试使用foreach：

foreach (var res in Employees)
{
    Console.WriteLine("Employee with key {0}: ID = {1}, Name = {2}", res.Key, res.Value.Id, res.Value.Name);
}

或者，简单地使用LINQ：

var output = Employees.Select(res => "Employee with key " + res.Key + ": ID = " + res.Value.Id + ", Name = " + res.Value.Name);

Answer 4

var items = Employees.Select(kvp => string.Format("Employee with key {0} : Id={1}, Name={2}", kvp.Key, kvp.Value.Id, kvp.Value.Name);

var text = string.Join(Environment.NewLine, items);

Answer 5

您可以定义IDictionary引用，并将其指向Dictionary对象

IDictionary<int, Employee> employees = new Dictionary<int,Employee>();
employees.Add(1, new Employee(1, "John"));
//add the rest of the employees

循环遍历字典，可以使用

foreach(KeyValuePair<int, Employee> entry in employees)
{
    Console.WriteLine("Employee with key "+entry.Key+": Id="+entry.Value.GetId()+", Name= "+entry.Value.GetName());
}

这类似于Java的HashMap<>。

打印字典值的简便方法？

5 个答案: