Writes binary data to a file : Image Load Save « ADO.Net « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. ADO.Net
3. Image Load Save

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

public class ConnectionTest
{
    private static string connectionString = "Data Source=localhost;Initial Catalog=pubs;Integrated Security=SSPI";
    private static string SQL = "SELECT pub_id, logo FROM pub_info";

    public static void Main() 
    {
        int bufferSize = 100;                  
        byte[] bytes = new byte[bufferSize];
        long bytesRead;
        long readFrom;

        SqlConnection con = new SqlConnection(connectionString);
        SqlCommand cmd = new SqlCommand(SQL, con);

        con.Open();
        SqlDataReader r = cmd.ExecuteReader(CommandBehavior.SequentialAccess);

        while (r.Read())
        {
            string filename = "logo.bmp";
            FileStream fs = new FileStream(filename, FileMode.OpenOrCreate, FileAccess.Write);
            BinaryWriter bw = new BinaryWriter(fs);
            readFrom = 0;
            do {
                bytesRead = r.GetBytes(1, readFrom, bytes, 0, bufferSize);
                bw.Write(bytes);
                bw.Flush();
                readFrom += bufferSize;
            } while (bytesRead == bufferSize);
            bw.Flush();
            bw.Close();
            fs.Close();
        }
        r.Close();
        con.Close();
    }
}