C# IndexOf Example | IndexOf | Source Code
C# IndexOf Example | IndexOf | Source Code
Purpose: – Illustrates the C# Syntax for IndexOf.
Step 1: Click on C# to Cut-n-paste code into clsIndexOf.cs
using System; public class clsIndexOf { public void Main() { //**************************************************************************************** // Example #1: IndexOf(string[, startIndex][,count]) // Returns an integer that represents the position of the first occurrence of the // specified number of characters. If you specify startIndex, that specifies // where to start looking. If you specify count, that specifies how many characters to // to search past start. If the string is not found, this method returns -1 //**************************************************************************************** Console.WriteLine("Example #1: IndexOf(string[, startIndex][,count]) "); string strIndexOfExample = "This is a test string"; Console.WriteLine(strIndexOfExample.IndexOf("is")); //Returns 2 Console.WriteLine(strIndexOfExample.IndexOf("xyz")); //Returns -1 (not found) //write blank line to make output easier to read Console.WriteLine(); //Prevent console from closing before you press enter Console.ReadLine(); } } |
Step 2: Click on C# to Cut-n-paste code into Program.cs
using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace CSharp_Syntax { class Program { static void Main(string[] args) { clsIndexOf myIndexOf = new clsIndexOf(); myIndexOf.Main(); } } } |
Prerequistes:
- Install C# (Express or Standard Edition)
- Install SQL Server Express
- Download Northwind and pubs Database
- Attach Northwind Database to Databases in Sql Express
- Attach pubs Database to Databases in Sql Express
Notes:
- Console Application is used to simplify things, but Windows Forms or Web Forms could also be used
- You can build a library of syntax examples by using same project over and over and just commenting out what you do not want to execute in Program.cs
Instructions:
- Use C# 2010 Express or Standard Edition
- Create new project;
- Click File/New Project
- Select Console Application Template
- Select C# for Language
- name of project could be CSharp_Syntax.
- Add New folder named “StringManipulation”
- Right-click project name in solution explorer;
- add new folder;
- name of folder could be: StringManipulation
- Add Class Named clsIndexOf to StringManipulation folder
- Right-click StringManipulation folder;
- add new item;
- Select class
- Class name could be clsIndexOf
- Click on C# in code in step 1 at top of page to copy code into clsIndexOf.cs
- Click on C# in step 2 at top of page to copy code into Program.cs
- Click green arrow or press F5 to run program