C# จะแก้ไข (Upload file BLOB and Binary Data) ไม่ได้ครับ ช่วยดูให้ที

protected void btnUpload_Click(object sender, EventArgs e)
        {
            
            string strconn = System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString"].ToString();
            SqlConnection objConn = new SqlConnection(strconn);

            this.pnlForm.Visible = false;

            if (string.IsNullOrEmpty(this.txtName.Text))
            {
                this.lblStatus.Text = "Please input Name.";

            }
            else
            {
                //*** Update Name ***'
                strSQL = "UPDATE product SET ProductName=@ProductName ,  ProductDetail=@ProductDetail  , ProductPrice=@ProductPrice   WHERE ProductId = @ProductId ";

                objCmd = new SqlCommand(strSQL, objConn);
                objCmd.Parameters.Add("@ProductName", SqlDbType.VarChar).Value = this.txtName.Text;
                objCmd.Parameters.Add("@ProductDetail", SqlDbType.VarChar).Value = this.txtProductdetail.Text;
                objCmd.Parameters.Add("@ProductPrice", SqlDbType.VarChar).Value = this.txtproductPrice.Text;
                objCmd.Parameters.Add("@ProductId", SqlDbType.Int).Value = Request.QueryString["ProductId"];
                objCmd.ExecuteNonQuery();

                //*** Update Picture ***'
                if (this.fUpload.HasFile == true)
                {
                    //*** Read Binary Data ***'
                    byte[] imbByte = new byte[fUpload.PostedFile.InputStream.Length + 1];
                    fUpload.PostedFile.InputStream.Read(imbByte, 0, imbByte.Length);

                    //*** MimeType ***'
                    string ExtType = System.IO.Path.GetExtension(fUpload.PostedFile.FileName).ToLower();
                    string strMIME = null;
                    switch (ExtType)
                    {
                        case ".gif":
                            strMIME = "image/gif";
                            break;
                        case ".jpg":
                        case ".jpeg":
                        case ".jpe":
                            strMIME = "image/jpeg";
                            break;
                        case ".png":
                            strMIME = "image/png";
                            break;
                        default:
                            this.lblStatus.Text = "Invalid file type.";
                            return;
                    }

                    strSQL = "UPDATE files SET FilesName = @sFilesName , FilesType = @sFilesType WHERE FilesID = @sFilesID ";

                    objCmd = new SqlCommand(strSQL, objConn);
                    objCmd.Parameters.Add("@sFilesName", SqlDbType.Binary).Value = imbByte;
                    objCmd.Parameters.Add("@sFilesType", SqlDbType.VarChar).Value = strMIME;
                    objCmd.Parameters.Add("@ProductId", SqlDbType.Int).Value = Request.QueryString["ProductId"];
                    objCmd.ExecuteNonQuery();

                }

                this.lblStatus.Text = "File Upload Successfully. Click <a href='ListPicture.aspx'>here</a> to view.";
            }
}