基于ASP.NET的OPOS打印

Question

我已经开发了一个餐厅计费网络应用程序(不是桌面应用程序，因为这是一个Web应用程序运行在浏览器中)使用ASP.NET Web Forms C# 4.0。现在，新的要求是POS热打印机收据打印。我对POS非常陌生，但不知怎的，我成功地构建并运行了一个示例，使用c#在c#上打印。

问题是我无法在本地主机网站上使用相同的代码打印。我用的是OPOS CCO，OposForDotNetAssemblies-1_13_000。

我的问题是：

1. 是否可以在LocalHost上打印OPOS？
2. 是否可以通过互联网网站在OPOS上打印？
3. 如果是，那我该怎么办？我做错了什么？

我所使用的守则是：

using POS.Devices;
private OPOSPOSPrinter Printer = null;
protected void Button1_Click(object sender, EventArgs e)
{
    Printer = new OPOSPOSPrinterClass();

    // Open the printer.
    Printer.Open("PosPrinter");
    Printer.ClaimDevice(1000);
    Printer.AsyncMode = true;
    Printer.DeviceEnabled = true;
    Printer.ResultCode;
    Printer.PrintNormal(2, "\x1B|cA\x1B|2CHeading\x1B|1C\n"+DateTime.Now.ToString("D")+"\n\n" );
    Printer.CutPaper(1);
    Printer.Close();
 }

有趣的是，没有错误，但我听到嘟嘟，直到超时，然后打印机打印一些点和字符在一行，而没有其他。这在windows窗体中没有发生。提前谢谢。

Answer 1

我最近开发了一个POS Web应用程序，它使用热打印机打印收据，它使用本地打印机

您只需使用javascript来捕获容器或.....your内容。

只需使用window.print() n来打印您的收据就可以了。

Answer 2

公共子GiftReceipt()

试一试

    Dim displayString As String

     Dim ESC As String = Chr(&H1B)

    displayString = ESC + "!" + Chr(1) + ESC + "|cA" + "Store Name" + ESC + "|1lF"
    displayString += ESC + "|cA" + "Store Address" + ESC + "|1lF"
    displayString += ESC + "|2C" + ESC + "|cA" + ESC + "|bC" + "Gift Receipt" + ESC + "|1lF" + ESC + "|1lF"
    displayString += ESC + "|N" + ESC + "!" + Chr(1) + "  Transaction #:  " + vbTab.ToString() + "105" + ESC + "|1lF"

displayString +=“Date：”+ Date.Today() + vbTab.ToString() + "Time：“

   displayString += DateAndTime.Now().ToLongTimeString() + ESC + "|1lF"

   displayString += "  Cashier:  " + CStr(_currSess.Cashier.Number) + vbTab.ToString() + "Register:  " + CStr(_currSess.Register.Number) + ESC + "|1lF" + ESC + "|1lF"

   displayString += ESC + "|2uC" + "  Item                 Description           Quantity" + ESC + "|N" + ESC + "!" + Chr(1) + ESC + "|1lF" + ESC + "|1lF" + "  "

    'Iterate loop for each row of the Data Set.
For k As Integer = 0 To TransactionSet1.TransactionEntry.Rows.Count - 1

            'Checking for each row which has selected in DataGrid item.
  If CType(dgTransactionList.Item(k, 0), System.String) = "True" Then

                  'Get the Item value from selected row.
      Dim item As String = dgTransactionList.Item(k, 1).ToString()

                  Dim itemValue As String = String.Empty
                   If item.Length > 11 Then

‘如果项目长度大于11，则取项目0到11的子字符串。Item = item.Substring(0，11) of’在项字符串中添加“”，直到长度11。而item.Length <= 11

                                 item += " "

                          End While

                  End If

     displayString += item + vbTab.ToString()
 Dim desc As String = dgTransactionList.Item(k, 2).ToString()
     Dim descValue As String = String.Empty

      If desc.Length > 20 Then

  'If Description length is greater then 20, then take substring of item 0 to 20.
             desc = desc.Substring(0, 20)

                Else
            While desc.Length <= 20

           'Adding " " in Description string until length 20.
                              desc += " "

                       End While

                End If

                displayString += desc + vbTab.ToString()
    Dim qnty As String = dgTransactionList.Item(k, 3).ToString()
                Dim qntyValue As String = String.Empty

                If qnty.Length > 3 Then

  'If Quantity length is greater then 20, then take substring of quantity 0 to 3.
      qnty = qnty.Substring(0, 3)

                Else

                    While qnty.Length <= 3

                  'Adding " " in Quantity string until length 20.
                             qntyValue += " "
                              qnty += " "

                    End While

                End If

                qntyValue += qnty.Trim()
                displayString += qntyValue
                displayString += ESC + "|1lF" + "  "

            End If

    Next k

 displayString += ESC + "|1lF"
 displayString += ESC + "|cA" + "Thank You for shopping" + ESC + "|1lF"
        displayString += ESC + "|cA" + _currSess.Configuration.StoreName + ESC + "|1lF"
        displayString += ESC + "|cA" + "We hope you'll come back soon!" + ESC + "|1lF" + ESC + "|1lF" + ESC + "|fP"
        _currSess.Register.SetActivePrinterNumber(0)

        Dim objRp As Object = _currSess.Register.ReceiptPrinter
        objRp.PrintNormal(2, displayString))

        objRp.Release()
        MsgBox("Gift Receipt printed Successfully.")

Catch ex As Exception

        MsgBox(ex.ToString())

 End Try

结束子对象