How to read files from directory and insert into database as bytes?

create table fupload(ImgName varchar(250),Img image)

using System.Data;
using System.Data.SqlClient;
public partial class _Default : System.Web.UI.Page 
{
    SqlConnection sqlcon = new SqlConnection(ConfigurationManager.ConnectionStrings["Con"].ConnectionString);
    SqlCommand sqlcmd = new SqlCommand();
    protected void Page_Load(object sender, EventArgs e)
    {
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        try
        {
            sqlcon.Open();
            byte[] cnt = null;
            //Source directory to read files 
            DirectoryInfo di = new DirectoryInfo("D:\\DNS\\samp");
            //if you want only jpg files then filter it
            FileInfo[] ArrFi = di.GetFiles("*.jpg");
            foreach (FileInfo fi in ArrFi)
            {
                cnt = FileToByteArray(fi.FullName);
                SqlCommand sqlcmd = new SqlCommand("insert into fupload(ImgName,Img) values (@Im, @Img)", sqlcon);
                sqlcmd.Parameters.Add("@Im", fi.Name);
                sqlcmd.Parameters.Add("@Img", cnt);
                sqlcmd.ExecuteNonQuery();
            }
        }
        catch (Exception ex)
        {

        }
        finally 
        {
            sqlcon.Close();
        }
    }
    public byte[] FileToByteArray(string fname)
    {
        byte[] cnt = null;
        try
        {
            System.IO.FileStream fs = new System.IO.FileStream(fname, System.IO.FileMode.Open, System.IO.FileAccess.Read);
            System.IO.BinaryReader br = new System.IO.BinaryReader(fs);
            long tb = new System.IO.FileInfo(fname).Length;
            cnt = br.ReadBytes((Int32)tb);
            fs.Close();
            fs.Dispose();
            br.Close();
        }
        catch (Exception ex)
        {
        }
        return cnt;
    }
}