检查SortedDictionary是否在C#中包含指定的键
要检查SortedDictionary是否包含指定的键，代码如下-
示例
using System;
using System.Collections;
using System.Collections.Generic;
public class Demo {
public static void Main() {
SortedDictionary<int, string> sortedDict = new SortedDictionary<int, string>();
sortedDict.Add(100, "Mobile");
sortedDict.Add(200, "Laptop");
sortedDict.Add(300, "Desktop");
sortedDict.Add(400, "Speakers");
sortedDict.Add(500, "Headphone");
sortedDict.Add(600, "Earphone");
Console.WriteLine("SortedDictionary key-value pairs...");
IDictionaryEnumerator demoEnum = sortedDict.GetEnumerator();
while (demoEnum.MoveNext())
Console.WriteLine("Key = " + demoEnum.Key + ", Value = "+ demoEnum.Value);
Console.WriteLine("\nThe SortedDictionary has the key 200? = "+sortedDict.ContainsKey(200));
}
}输出结果
这将产生以下输出-
SortedDictionary key-value pairs... Key = 100, Value = Mobile Key = 200, Value = Laptop Key = 300, Value = Desktop Key = 400, Value = Speakers Key = 500, Value = Headphone Key = 600, Value = Earphone The SortedDictionary has the key 200? = True
示例
让我们看另一个例子-
using System;
using System.Collections;
using System.Collections.Generic;
public class Demo {
public static void Main() {
SortedDictionary<string, string> sortedDict = new SortedDictionary<string, string>();
sortedDict.Add("A", "John");
sortedDict.Add("B", "Andy");
sortedDict.Add("C", "Tim");
sortedDict.Add("D", "Ryan");
sortedDict.Add("E", "Kevin");
sortedDict.Add("F", "Katie");
sortedDict.Add("G", "Brad");
Console.WriteLine("SortedDictionary key-value pairs...");
IDictionaryEnumerator demoEnum = sortedDict.GetEnumerator();
while (demoEnum.MoveNext())
Console.WriteLine("Key = " + demoEnum.Key + ", Value = "+ demoEnum.Value);
Console.WriteLine("\nThe SortedDictionary has the key F? = "+sortedDict.ContainsKey("F"));
}
}输出结果
这将产生以下输出-
SortedDictionary key-value pairs... Key = A, Value = John Key = B, Value = Andy Key = C, Value = Tim Key = D, Value = Ryan Key = E, Value = Kevin Key = F, Value = Katie Key = G, Value = Brad The SortedDictionary has the key F? = True