Question

我希望在没有打印对话框的客户端打印收据，我使用mvc这是我解决方案来实现我的问题。 EPSON打印机安装在我的系统中。这个解决方案在我本地iis的主机上工作，但是当主机在服务器中并且从本地系统访问时出现“处理请求时出错”错误。在服务器中没有安装打印机。

$.ajax({
type: "POST",
url: '../Service/print',
cache: false,
data: { iprintData: printData, iprinterName: sPrinterName },
success: function (data) {
// alert('print Send Successfully');
},
error: function (ex) {
   alert(ex.responseText);
// alert('error while Seding print');
}
});

这是我在控制器中的代码

    public JsonResult print(string iprintData, string iprinterName)
    {
        Boolean bflag = false;
        System.Web.HttpContext.Current.Session["_printData"] = iprintData; 
        PrintDocument printDocument = new PrintDocument();
        printDocument.PrintController = new StandardPrintController();            
        printDocument.PrintPage += PrintDocumentOnPrintPage;
        printDocument.PrinterSettings.PrinterName = iprinterName;
        //printFont = new System.Drawing.Font("Arial", 10);
        printDocument.Print();
        bflag = true;            
        return Json(bflag, JsonRequestBehavior.AllowGet);
    }

    public static Image resizeImage(Image image, int new_height, int new_width)
    {
        Bitmap new_image = new Bitmap(new_height, new_width);
        Graphics g = Graphics.FromImage((Image)new_image);
        g.InterpolationMode = InterpolationMode.High;
        g.DrawImage(image, 0, 0, new_width, new_height);
        return new_image;
    }
    private void PrintDocumentOnPrintPage(object sender, PrintPageEventArgs e)
    {
        string printstring = System.Web.HttpContext.Current.Session["_printData"].ToString();
        string path = HttpContext.Server.MapPath("~/content/Images/logo.png");
        System.Drawing.Image img = Image.FromFile(path);


        //img = resizeImage(img, 80, 60);
        e.Graphics.DrawImage(img, 6, 100);
        e.Graphics.DrawString(printstring, new System.Drawing.Font("ronnia", 9), Brushes.Black, 10, 150);
    }

任何人都可以帮助我吗？

Answer 1

设置System.Drawing.dll属性

sizeof()

Answer 2

首先，您必须编写包含 HttpListener 的 Windows 服务。
在服务中编写您的打印代码
在客户端机器上安装服务
使用 ajax 调用该服务，如下所示。

    function PrintReceipt() {

        var PrintData = JSON.parse($("#receiptData").html())

        if (PrintData.length > 0) {

            $.ajax({
                type: "POST", 
                url: "http://localhost:41963/printOrder",
                data: JSON.stringify({ "PrintData": PrintData }), //reciept data
                crossDomain: true, 
                success: function (response) {

                    
                },
                error: function () {
                  
                }
            });
        }

       
    }

如何在客户端

2 个答案: