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Check if OrderedDictionary collection contains a specific key in C#
To check if OrderedDictionary collection contains a specific key, the code is as follows −
Example
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")); } }
Output
This will produce the following output −
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
Example
Let us see another example −
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")); } }
Output
This will produce the following output −
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
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