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Index of first occurrence in StringCollection in C#?
To get the index of first occurrence in StringCollection, 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 first occurrence of Books? = "+strCol.IndexOf("Books"));
}
}Output
This will produce the following output −
StringCollection elements... Accessories Books Electronics Books StringCollection elements...UPDATED Accessories Books Headphone Electronics Books Index of first occurrence of Books? = 1
Example
Let us now see another example −
using System;
using System.Collections.Specialized;
public class Demo {
public static void Main() {
StringCollection strCol = new StringCollection();
String[] strArr = new String[] { "A", "B", "C", "D", "E", "F", "D", "H" };
Console.WriteLine("StringCollection elements...");
foreach (string str in strArr) {
Console.WriteLine(str);
}
strCol.AddRange(strArr);
Console.WriteLine("Element at 5th index = "+strCol[5]);
Console.WriteLine("Count of strings in StringCollection = " + strCol.Count);
Console.WriteLine("Index of first occurrence of D? = "+strCol.IndexOf("D"));
}
}Output
This will produce the following output −
StringCollection elements... A B C D E F D H Element at 5th index = F Count of strings in StringCollection = 8 Index of first occurrence of D? = 3
Updated on: 16-Dec-2019
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