protected void preview_Callback(object sender, CallbackEventArgsBase e)
        {
            using (var uow = new OriginationUow())
            {
                var id = new Guid(Convert.ToString(hdf_attchmentid.Get("attachmentid")));
                var file = uow.Attachments.GetAll().Where(o => o.InvoiceId == (id));

                foreach (var item in file)
                {

                    byte[] fileBytes = item.FileDetails;
                    var filename = item.DocName;

                    if (filename.EndsWith(".pdf"))
                    {
                        // Assume that 'imageBytes' is your byte array containing the image data

                        // Convert the byte array to a Base64-encoded string
                        string base64String = Convert.ToBase64String(fileBytes);

                        // Generate the data URL with the Base64-encoded image
                        string imageUrl = $"data:image/png;base64,{base64String}";

                        // Use window.location to display the image in a new window or tab
                        ScriptManager.RegisterStartupScript(this, this.GetType(), "openImage", $"window.open('{imageUrl}')", true);

                        _name = "View/Attachment/PdfFile.aspx";
                    }

                    // cppreview.JSProperties["cpResult"] = _name;
                }
            }
        }

protected void preview_Callback(object sender, CallbackEventArgsBase e)
        {
            using (var uow = new OriginationUow())
            {
                var id = new Guid(Convert.ToString(hdf_attchmentid.Get("attachmentid")));
                var file = uow.Attachments.GetAll().Where(o => o.InvoiceId == (id));

                foreach (var item in file)
                {

                    byte[] fileBytes = item.FileDetails;
                    var filename = item.DocName;

                    if (filename.EndsWith(".pdf"))
                    {
                        // Assume that 'imageBytes' is your byte array containing the image data

                        // Convert the byte array to a Base64-encoded string
                        string base64String = Convert.ToBase64String(fileBytes);

                        // Generate the data URL with the Base64-encoded image
                        string imageUrl = $"data:image/png;base64,{base64String}";

                        // Use window.location to display the image in a new window or tab
                        ScriptManager.RegisterStartupScript(this, this.GetType(), "openImage", $"window.open('{imageUrl}')", true);

                        _name = "View/Attachment/PdfFile.aspx";
                    }

                    // cppreview.JSProperties["cpResult"] = _name;
                }
            }
        }