要从StringDictionary中删除具有指定键的条目,代码如下-
using System; using System.Collections; using System.Collections.Specialized; public class Demo { public static void Main() { StringDictionary strDict1 = new StringDictionary(); strDict1.Add("A", "John"); strDict1.Add("B", "Andy"); strDict1.Add("C", "Tim"); strDict1.Add("D", "Ryan"); strDict1.Add("E", "Kevin"); strDict1.Add("F", "Katie"); strDict1.Add("G", "Brad"); Console.WriteLine("StringDictionary1键值对..."); foreach(DictionaryEntry de in strDict1) { Console.WriteLine(de.Key + " " + de.Value); } strDict1.Remove("D"); Console.WriteLine("\n删除后 StringDictionary1键值对..."); foreach(DictionaryEntry de in strDict1) { Console.WriteLine(de.Key + " " + de.Value); } StringDictionary strDict2 = new StringDictionary(); strDict2.Add("1", "A"); strDict2.Add("2", "B"); strDict2.Add("3", "C"); strDict2.Add("4", "D"); strDict2.Add("5", "E"); Console.WriteLine("\nStringDictionary2键值对..."); IEnumerator demoEnum = strDict2.GetEnumerator(); DictionaryEntry d; while (demoEnum.MoveNext()) { d = (DictionaryEntry)demoEnum.Current; Console.WriteLine("Key = " + d.Key + ", Value = " + d.Value); } } }
输出结果
这将产生以下输出-
StringDictionary1键值对... a John b Andy c Tim d Ryan e Kevin f Katie g Brad 删除后StringDictionary1键值对... a John b Andy c Tim e Kevin f Katie g Brad StringDictionary2键值对... Key = 1, Value = A Key = 2, Value = B Key = 3, Value = C Key = 4, Value = D Key = 5, Value = E
让我们看另一个例子-
using System; using System.Collections; using System.Collections.Specialized; public class Demo { public static void Main() { StringDictionary strDict1 = new StringDictionary(); strDict1.Add("A", "One"); strDict1.Add("B", "Two"); strDict1.Add("C", "Three"); strDict1.Add("D", "Four"); strDict1.Add("E", "Five"); Console.WriteLine("StringDictionary1键值对..."); foreach(DictionaryEntry de in strDict1) { Console.WriteLine(de.Key + " " + de.Value); } strDict1.Remove("B"); strDict1.Remove("C"); Console.WriteLine("\n删除后 StringDictionary1键值对..."); foreach(DictionaryEntry de in strDict1) { Console.WriteLine(de.Key + " " + de.Value); } } }
输出结果
这将产生以下输出-
StringDictionary1键值对... a One b Two c Three d Four e Five 删除后StringDictionary1键值对... a One d Four e Five