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Searching the index of specified object in Collection in C#
To search the index of specified object in Collection, the code is as follows −
Example
using System; using System.Collections.Specialized; public class Demo { public static void Main() { StringCollection strCol = new StringCollection(); strCol.Add("Accessories"); strCol.Add("Books"); strCol.Add("Electronics"); strCol.Add("Books"); Console.WriteLine("StringCollection elements..."); foreach (string res in strCol) { Console.WriteLine(res); } strCol.Insert(2, "Headphone"); Console.WriteLine("StringCollection elements...UPDATED"); foreach (string res in strCol) { Console.WriteLine(res); } Console.WriteLine("Index of specific object Electronics? = "+strCol.IndexOf("Electronics")); } }
Output
This will produce the following output −
StringCollection elements... Accessories Books Electronics Books StringCollection elements...UPDATED Accessories Books Headphone Electronics Books Index of specific object Electronics? = 3
Example
Let us now see another example −
using System; using System.Collections.Specialized; public class Demo { public static void Main() { StringCollection stringCol = new StringCollection(); String[] arr = new String[] { "100", "200", "300", "400", "500" }; Console.WriteLine("Array elements..."); foreach (string res in arr) { Console.WriteLine(res); } stringCol.AddRange(arr); Console.WriteLine("Does the specified string is in the StringCollection? = "+stringCol.Contains("800")); Console.WriteLine("Total number of elements = "+stringCol.Count); Console.WriteLine("Iterating through StringCollection = "+stringCol.Count); StringEnumerator myenum = stringCol.GetEnumerator(); while (myenum.MoveNext()) Console.WriteLine(myenum.Current); Console.WriteLine("Index of specific object 500? = "+stringCol.IndexOf("500")); Console.WriteLine("Index of specific object 1000? = "+stringCol.IndexOf("1000")); } }
Output
This will produce the following output −
Array elements... 100 200 300 400 500 Does the specified string is in the StringCollection? = False Total number of elements = 5 Iterating through StringCollection = 5 100 200 300 400 500 Index of specific object 500? = 4 Index of specific object 1000? = -1
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