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法律研究C# 中 SortedDictionary.ContainsValue() 方法
C# 中的 SortedDictionary.ContainsValue() 方法用于判断 SortedDictionary<TKey, TValue> 是否包含具有指定值的元素。
语法
语法如下 −
public bool ContainsValue (TValue val);
上述代码中，值 val 是要再 SortedDictionary<TKey, TValue> 中搜索的值。
示例
现在让我们看一个例子 −
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, "Inspiron");
sortedDict.Add(200, "Alienware");
sortedDict.Add(300, "Projectors");
sortedDict.Add(400, "XPS");
Console.WriteLine("SortedDictionary key-value pairs...");
IDictionaryEnumerator demoEnum = sortedDict.GetEnumerator();
while (demoEnum.MoveNext())
Console.WriteLine("Key = " + demoEnum.Key + ", Value = " + demoEnum.Value);
Console.WriteLine("Count of SortedDictionary key-value pairs = "+sortedDict.Count);
sortedDict.Add(800, "Notebook");
sortedDict.Add(10000, "Bluetooth Speaker");
Console.WriteLine("
SortedDictionary key-value pairs...UPDATED");
demoEnum = sortedDict.GetEnumerator();
while (demoEnum.MoveNext())
Console.WriteLine("Key = " + demoEnum.Key + ", Value = " + demoEnum.Value);
Console.WriteLine("Count of SortedDictionary key-value pairs (UPDATED) = "+sortedDict.Count);
Console.WriteLine("Is the value in the SortedDictionary key-value pairs = "+sortedDict.ContainsValue("Notebook"));
sortedDict.Clear();
Console.WriteLine("
Count of SortedDictionary key-value pairs (UPDATED) = "+sortedDict.Count);
}
}输出
将产生以下输出 −
SortedDictionary key-value pairs... Key = 100, Value = Inspiron Key = 200, Value = Alienware Key = 300, Value = Projectors Key = 400, Value = XPS Count of SortedDictionary key-value pairs = 4 SortedDictionary key-value pairs...UPDATED Key = 100, Value = Inspiron Key = 200, Value = Alienware Key = 300, Value = Projectors Key = 400, Value = XPS Key = 800, Value = Notebook Key = 10000, Value = Bluetooth Speaker Count of SortedDictionary key-value pairs (UPDATED) = 6 Is the value in the SortedDictionary key-value pairs = True Count of SortedDictionary key-value pairs (UPDATED) = 0
示例
现在让我们看另一个示例 −
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(1, "One");
sortedDict.Add(2, "Two");
sortedDict.Add(3, "Three");
sortedDict.Add(4, "Four");
sortedDict.Add(5, "Five");
sortedDict.Add(6, "Six");
Console.WriteLine("SortedDictionary key-value pairs...");
IDictionaryEnumerator demoEnum = sortedDict.GetEnumerator();
while (demoEnum.MoveNext())
Console.WriteLine("Key = " + demoEnum.Key + ", Value = " + demoEnum.Value);
Console.WriteLine("Count of SortedDictionary key-value pairs = "+sortedDict.Count);
sortedDict.Add(7, "Seven");
sortedDict.Add(8, "Eight");
Console.WriteLine("
SortedDictionary key-value pairs...UPDATED");
demoEnum = sortedDict.GetEnumerator();
while (demoEnum.MoveNext())
Console.WriteLine("Key = " + demoEnum.Key + ", Value = " + demoEnum.Value);
Console.WriteLine("Count of SortedDictionary key-value pairs (UPDATED) = "+sortedDict.Count);
Console.WriteLine("Is the value in the SortedDictionary key-value pairs = "+sortedDict.ContainsValue("Eleven"));
sortedDict.Clear();
Console.WriteLine("
Count of SortedDictionary key-value pairs (UPDATED) = "+sortedDict.Count);
}
}输出
将产生以下输出 −
SortedDictionary key-value pairs... Key = 1, Value = One Key = 2, Value = Two Key = 3, Value = Three Key = 4, Value = Four Key = 5, Value = Five Key = 6, Value = Six Count of SortedDictionary key-value pairs = 6 SortedDictionary key-value pairs...UPDATED Key = 1, Value = One Key = 2, Value = Two Key = 3, Value = Three Key = 4, Value = Four Key = 5, Value = Five Key = 6, Value = Six Key = 7, Value = Seven Key = 8, Value = Eight Count of SortedDictionary key-value pairs (UPDATED) = 8 Is the value in the SortedDictionary key-value pairs = False Count of SortedDictionary key-value pairs (UPDATED) = 0
更新于： 03-Dec-2019
41 次观看
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