User-1159036174 posted

I am traying change my old "RequestHandler.ashx" to asp.net core but now I am getting some problem with the migration, could any one help?

Into the Statup.cs:

app.MapWhen(context => context.Request.Path.ToString().EndsWith(".order"),
appBuilder =>
appBuilder.UsePrintMiddleware();

On my Meddleware:

public static class PrintMiddlewareHelper
public static IApplicationBuilder UsePrintMiddleware
(this IApplicationBuilder builder)
return builder.UseMiddleware<PrintController>();

On my controller:

private RequestDelegate _next;

public PrintController(RequestDelegate next)
_next = next;

public async Task Invoke(HttpContext context)
context.Response.ContentType = "application/octet-stream";

// Pega número do pedido para criar o cupom
var BytesValue = CriaResponse(context.Request.Path.Value.ToLower().Replace("/", "").Replace(".order", ""));
context.Response.BinaryWrite(BytesValue);
await _next.Invoke(context);
// Acessa PrinterUtility e gera dados do cupom para enviar à impressora térmica
private byte[] CriaResponse(string idOrder)
PrinterUtility.EscPosEpsonCommands.EscPosEpson obj = new PrinterUtility.EscPosEpsonCommands.EscPosEpson();

var BytesValue = Encoding.ASCII.GetBytes(string.Empty);
//BytesValue = PrintExtensions.AddBytes(BytesValue, GetLogo(@"D://logo1.bmp"));
BytesValue = PrintExtensions.AddBytes(BytesValue, obj.Separator());
BytesValue = PrintExtensions.AddBytes(BytesValue, obj.CharSize.DoubleWidth6());
BytesValue = PrintExtensions.AddBytes(BytesValue, obj.FontSelect.FontA());
BytesValue = PrintExtensions.AddBytes(BytesValue, obj.Alignment.Center());
BytesValue = PrintExtensions.AddBytes(BytesValue, Encoding.ASCII.GetBytes("Title\n"));
BytesValue = PrintExtensions.AddBytes(BytesValue, obj.CharSize.DoubleWidth4());
BytesValue = PrintExtensions.AddBytes(BytesValue, Encoding.ASCII.GetBytes("Sub Title\n"));
BytesValue = PrintExtensions.AddBytes(BytesValue, obj.CharSize.Nomarl());
BytesValue = PrintExtensions.AddBytes(BytesValue, obj.Separator());
BytesValue = PrintExtensions.AddBytes(BytesValue, Encoding.ASCII.GetBytes("Invoice\n"));
BytesValue = PrintExtensions.AddBytes(BytesValue, obj.Alignment.Left());
BytesValue = PrintExtensions.AddBytes(BytesValue, Encoding.ASCII.GetBytes("Invoice No. : " + IdOrder+ "\n"));
BytesValue = PrintExtensions.AddBytes(BytesValue, Encoding.ASCII.GetBytes("Date : 12/12/2015\n"));
BytesValue = PrintExtensions.AddBytes(BytesValue, Encoding.ASCII.GetBytes("Itm Qty Net Total\n"));
BytesValue = PrintExtensions.AddBytes(BytesValue, obj.Separator());
BytesValue = PrintExtensions.AddBytes(BytesValue, string.Format("{0,-40}{1,6}{2,9}{3,9:N2}\n", "item 1", 12, 11, 144.00));
BytesValue = PrintExtensions.AddBytes(BytesValue, string.Format("{0,-40}{1,6}{2,9}{3,9:N2}\n", "item 2", 12, 11, 144.00));
BytesValue = PrintExtensions.AddBytes(BytesValue, obj.Alignment.Right());
BytesValue = PrintExtensions.AddBytes(BytesValue, obj.Separator());
BytesValue = PrintExtensions.AddBytes(BytesValue, Encoding.ASCII.GetBytes("Total\n"));
BytesValue = PrintExtensions.AddBytes(BytesValue, Encoding.ASCII.GetBytes("288.00\n"));
BytesValue = PrintExtensions.AddBytes(BytesValue, obj.Separator());
BytesValue = PrintExtensions.AddBytes(BytesValue, obj.Lf());
BytesValue = PrintExtensions.AddBytes(BytesValue, obj.Alignment.Center());
BytesValue = PrintExtensions.AddBytes(BytesValue, obj.CharSize.DoubleHeight6());
BytesValue = PrintExtensions.AddBytes(BytesValue, obj.BarCode.Code128("12345"));
BytesValue = PrintExtensions.AddBytes(BytesValue, obj.QrCode.Print("12345", PrinterUtility.Enums.QrCodeSize.Grande));
BytesValue = PrintExtensions.AddBytes(BytesValue, "-------------------Thank you for coming------------------------\n");
BytesValue = PrintExtensions.AddBytes(BytesValue, obj.Alignment.Left());
BytesValue = PrintExtensions.AddBytes(BytesValue, CutPage());
return BytesValue;

On my another application:

static void Main(string[] args)
string Parameter = args[0].ToLower().ToString().Replace(POSJobHandler.Properties.Settings.Default.ReplaceText.ToLower(),"");
string Ext = POSJobHandler.Properties.Settings.Default.PostExtn;
string url = POSJobHandler.Properties.Settings.Default.UrlPost + "/" + Parameter + "." + Ext;

WebRequest request = WebRequest.Create(url);
WebResponse response=request.GetResponse();

string result;
using (StreamReader reader = new StreamReader(response.GetResponseStream()))
result = reader.ReadToEnd();
RawPrinterHelper.SendValueToPrinter(POSJobHandler.Properties.Settings.Default.PrinterName, Encoding.ASCII.GetBytes(result) );

return;

Everything was working fine before moveing to asp.net core, but now, context.Response.BinaryWrite(BytesValue) isn't working anymore! (Response.BinaryWrite does not contain a definition)

How can I do that now? Need I change to Json, for exemplo, and than convert to Binary as a result on my another application?