SqlDataReader Example – C# – SqlDataReader Example

SqlDataReader Example – C# – SqlDataReader Example

Purpose: – Illustrates using C# SqlDataReader to read sql table.
Prerequistes:

1. Install C# (Express or Standard Edition)
2. Install SQL Server Express
3. Download Northwind Database
4. Attach Northwind 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# 2008 (Express or Standard) Edition
2. Create new project; select Console Application; name of Project could be CSharp_Syntax.
3. Right-click project name in solution explorer; add new folder; name of folder could be DatabaseADONET
4. Right-click folder; add class; class name could be clsSqlDataReader.cs
5. Copy code into clsSqlDataReader.cs
6. Copy code into Program.cs
7. Click green arrow to start with debugging

Step 1: Use View Plain to Cut-n-paste code into clsSqlDataReader.cs

using System;
using System.Data;
using System.Data.SqlClient;


public class clsSqlDataReader
{
    static SqlConnection con;

    public void Main()
    {
        con = new SqlConnection("Server=(local)\\SQLEXPRESS;Initial Catalog=Northwind;Integrated Security=SSPI");

        SqlCommand cmd = new SqlCommand();

        cmd.CommandText = "SELECT FirstName, LastName FROM Employees";
        cmd.Connection = con;

        try
        {
            con.Open();
            SqlDataReader reader = cmd.ExecuteReader();
            //(CommandBehavior.SingleRow)
            while (reader.Read())
            {
                Console.WriteLine("{0} - {1}", reader.GetString(0), reader.GetString(1));
            }
            reader.Close();
        }
        finally
        {
            con.Close();
        }
        Console.ReadLine();
    }
}

Step 2: Use View Plain 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)
        {
            //DatabaseADONET

            
            clsSqlDataReader mySqlDataReader = new clsSqlDataReader();
            mySqlDataReader.Main();
        }
    }
}

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