检查OrderedDictionary集合是否在C#中包含特定键
要检查OrderedDictionary集合是否包含特定键，代码如下-
示例
using System;
using System.Collections;
using System.Collections.Specialized;
public class Demo {
public static void Main(){
OrderedDictionary dict = new OrderedDictionary();
dict.Add("1", "One");
dict.Add("2", "Two");
dict.Add("3", "Three");
dict.Add("4", "Four");
dict.Add("5", "Five");
dict.Add("6", "Six");
dict.Add("7", "Seven");
dict.Add("8", "Eight");
ICollection col = dict.Values;
String[] strVal = new String[dict.Count];
col.CopyTo(strVal, 0);
Console.WriteLine("Displaying the values...");
for (int i = 0; i < dict.Count; i++) {
Console.WriteLine(strVal[i]);
}
Console.WriteLine("If OrderedDictionary read-only? = "+dict.IsReadOnly);
Console.WriteLine("The OrderedDictionary has the key 15? = "+dict.Contains("15"));
Console.WriteLine("The OrderedDictionary has the key 5? = "+dict.Contains("5"));
}
}输出结果
这将产生以下输出-
Displaying the values... One Two Three Four Five Six Seven Eight If OrderedDictionary read-only? = False The OrderedDictionary has the key 15? = False The OrderedDictionary has the key 5? = True
示例
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(){
OrderedDictionary dict = new OrderedDictionary();
dict.Add("A", "Pen");
dict.Add("B", "Pencil");
dict.Add("C", "Notebook");
dict.Add("D", "Table");
dict.Add("E", "Chair");
dict.Add("F", "Coworking");
dict.Add("G", "Cubicle");
dict.Add("H", "Sticky Notes");
dict.Add("I", "WhiteBoard");
dict.Add("J", "Marker");
ICollection col = dict.Values;
String[] strVal = new String[dict.Count];
col.CopyTo(strVal, 0);
Console.WriteLine("Displaying the values...");
for (int i = 0; i < dict.Count; i++) {
Console.WriteLine(strVal[i]);
}
Console.WriteLine("If OrderedDictionary read-only? = "+dict.IsReadOnly);
Console.WriteLine("The OrderedDictionary has the key B? = "+dict.Contains("B"));
}
}输出结果
这将产生以下输出-
Displaying the values... Pen Pencil Notebook Table Chair Coworking Cubicle Sticky Notes WhiteBoard Marker If OrderedDictionary read-only? = False The OrderedDictionary has the key B? = True