C# IsNullOrEmpty Example Syntax | C-Sharp String Method | Source Code

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C# IsNullOrEmpty Example Syntax | C-Sharp String Method | Source Code

Purpose: – Illustrates the C# Syntax for IsNullOrEmpty.

 C# | 
 copy code |
?
 
using System;
public class clsIsNullOrEmpty
{
 
    public void Main()
    {
 
        //****************************************************************************************
        // Example #1: String.IsNullorEmpty(string)
 
        //****************************************************************************************
 
 
        //****************************************************************************************
        // Example #1: String.IsNullorEmpty(string)
        // Returns a Boolean value that indicates if the string is Null or Empty. 
        //****************************************************************************************
 
        Console.WriteLine("Example #1: String.IsNullorEmpty ");
 
        string strIsNullorEmptyExample = "This is a test string";
 
        Console.WriteLine(string.IsNullOrEmpty(strIsNullorEmptyExample)); //Returns False
 
        //write blank line to make output easier to read
        Console.WriteLine();
 
 
 
        //Prevent console from closing before you press enter
        Console.ReadLine();
 
    }
 
 
}
 

 C# | 
 copy code |
?
 
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
 
nameIsNullOrEmpty CSharp_Syntax
{
    class Program
    {
        static void Main(string[] args)
        {
 
 
            clsIsNullOrEmpty myIsNullOrEmpty = new clsIsNullOrEmpty();
            myIsNullOrEmpty.Main();
 
        }
    }
}
 
 
 

1. Install C# (Express or Standard Edition)
2. Install SQL Server Express
3. Download Northwind and pubs Database
4. Attach Northwind Database to Databases in Sql Express
5. 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:

1. Use C# 2010 Express or Standard Edition
2. Create new project;
   • Click File/New Project
   • Select Console Application Template
   • Select C# for Language
   • name of project could be CSharp_Syntax.
3. Add New folder named "StringManipulation"
   • Right-click project name in solution explorer;
   • add new folder;
   • name of folder could be: StringManipulation
4. Add Class Named clsIsNullOrEmpty to StringManipulation folder
   • Right-click StringManipulation folder;
   • add new item;
   • Select class
   • Class name could be clsIsNullOrEmpty
5. Click on C# in code in step 1 at top of page to copy code into clsIsNullOrEmpty.cs
6. Click on C# in step 2 at top of page to copy code into Program.cs
7. Click green arrow or press F5 to run program

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