C#中检查SortedList对象是否包含特定键
在C#中要检查SortedList对象是否包含特定键，代码如下-
示例
using System;
using System.Collections;
public class Demo {
public static void Main() {
SortedList list = new SortedList ();
list.Add("A", "Books");
list.Add("B", "Electronics");
list.Add("C", "Appliances");
list.Add("D", "Pet Supplies");
list.Add("E", "Clothing");
list.Add("F", "Footwear");
Console.WriteLine("与键E关联的值 = "+list["E"]);
list["E"] = "HDD";
Console.WriteLine("与键E关联的值 [更新后] = "+list["E"]);
Console.Write("列表中是否有键C? = "+list.Contains("C"));
}
}输出结果
这将产生以下输出-
与键E关联的值 = Clothing 与键E关联的值 [更新后] = HDD 列表中是否有键C? = True
示例
现在让我们来看另一个示例-
using System;
using System.Collections;
public class Demo {
public static void Main(String[] args) {
SortedList sortedList = new SortedList();
sortedList.Add("A", "1");
sortedList.Add("B", "2");
sortedList.Add("C", "3");
sortedList.Add("D", "4");
sortedList.Add("E", "5");
sortedList.Add("F", "6");
sortedList.Add("G", "7");
sortedList.Add("H", "8");
sortedList.Add("I", "9");
sortedList.Add("J", "10");
Console.WriteLine("SortedList元素...");
foreach(DictionaryEntry d in sortedList) {
Console.WriteLine("Key = "+d.Key + ", Value = " + d.Value);
}
Console.WriteLine("SortedList键-值对数 = "+sortedList.Count);
sortedList.RemoveAt(3);
Console.WriteLine("\n遍历SortedList的枚举器。。。");
IDictionaryEnumerator demoEnum = sortedList.GetEnumerator();
while (demoEnum.MoveNext())
Console.WriteLine("Key = " + demoEnum.Key + ", Value = "+ demoEnum.Value);
Console.WriteLine("SortedList键值对计数（更新） = "+sortedList.Count);
Console.WriteLine("\n列表中是否有键C? = "+sortedList.Contains("C"));
Console.WriteLine("列表中是否有键M? = "+sortedList.Contains("M"));
}
}输出结果
这将产生以下输出-
SortedList元素... Key = A, Value = 1 Key = B, Value = 2 Key = C, Value = 3 Key = D, Value = 4 Key = E, Value = 5 Key = F, Value = 6 Key = G, Value = 7 Key = H, Value = 8 Key = I, Value = 9 Key = J, Value = 10 SortedList键-值对数 = 10 遍历SortedList的枚举器。。。 Key = A, Value = 1 Key = B, Value = 2 Key = C, Value = 3 Key = E, Value = 5 Key = F, Value = 6 Key = G, Value = 7 Key = H, Value = 8 Key = I, Value = 9 Key = J, Value = 10 SortedList键值对计数（更新） = 9 列表中是否有键C? = True 列表中是否有键M? = False