how to display image in crystal report from database

protected void SaveImage_Click(object sender, EventArgs e)
{
    if (FileUpload1.PostedFile != null && FileUpload1.PostedFile.FileName != "")
    {
        byte[] img = new byte[FileUpload1.PostedFile.ContentLength];
        HttpPostedFile Image = FileUpload1.PostedFile;
        Image.InputStream.Read(img, 0, (int)FileUpload1.PostedFile.ContentLength);
        string str = "insert img values(@img)";
        SqlConnection cn = new SqlConnection("data source=localhost;initial catalog=DBName;user id=sa;password=password");
        cn.Open();
        SqlCommand cmd = new SqlCommand(str, cn);
        cmd.Parameters.AddWithValue("@img", img);
        SqlDataReader dr = cmd.ExecuteReader();
        cn.Close();
    }
}

protected void ViewReport_Click(object sender, EventArgs e)
{
    SqlConnection cn = new SqlConnection("data source=localhost;initial catalog=DBName;user id=sa;password=password");
    cn.Open();
    SqlDataAdapter cmd = new SqlDataAdapter("select * from img", cn);
    DataTable dt = new DataTable();
    cmd.Fill(dt);
    string file = Server.MapPath("") + "\\CrystalReport.rpt";
    CrystalDecisions.CrystalReports.Engine.ReportDocument orpt = new CrystalDecisions.CrystalReports.Engine.ReportDocument();
    orpt.Load(file);
    orpt.SetDataSource(dt);
    CrystalReportViewer1.ReportSource = orpt;
    //CrystalReportViewer1.DataBind();
}