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本文主要介绍C#中字典(Dictionary)遍历的几种方法。

1、使用for遍历字典(Dictionary)

注意:ElementAt()需要引入using System.Linq命名空间,Dictionary命令空间是using System.Collections.Generic;

    Dictionary<string, string> dic =
new Dictionary<string, string> {
["key1"] = "value1",
["key2"] = "value2",
["key3"] = "value3"
};
for (int i = 0; i < dic.Count; i++) {
var item = dic.ElementAt (i);
Console.WriteLine ("key is " + item.Key);
Console.WriteLine ("value is " + item.Value);
}
for (int i = 0; i < dic.Count; i++) {
Console.WriteLine ("key is " + dic.Keys.ElementAt (i));
Console.WriteLine ("value is " + dic.Values.ElementAt (i));
}

2、使用foreach遍历字典(Dictionary)

    Dictionary<string, string> dic =
new Dictionary<string, string> {
["key1"] = "value1",
["key2"] = "value2",
["key3"] = "value3"
};
foreach (string key in dic.Keys) {
Console.WriteLine ("key is " + key);
Console.WriteLine ("value is " + dic[key]);
}
foreach (string value in dic.Values) {
Console.WriteLine ("value is " + value);
}
foreach (KeyValuePair<string, string> item in dic) {
Console.WriteLine ("key is " + item.Key);
Console.WriteLine ("value is " + item.Value);
}

3、使用while遍历字典(Dictionary)

    Dictionary<string, string> dic =
new Dictionary<string, string> {
["key1"] = "value1",
["key2"] = "value2",
["key3"] = "value3"
};
var enumerator = dic.GetEnumerator ();
while (enumerator.MoveNext ()) {
Console.WriteLine ("key is " + enumerator.Current.Key);
Console.WriteLine ("value is " + enumerator.Current.Value);
}