如何使用C＃在ASP.NET中静默打印pdf？ [英] How to print pdf silently in ASP.NET with C#?

问题描述

我尝试使用C＃在asp.net中静默打印PDF时遇到异常。有时我在打开PDF时出错。该进程找不到指定的文件。另外我也不希望pdf打开。



代码如下：

I am getting the exception while trying to print a PDF silently in asp.net with C#. At times I am getting error opening the PDF. the process cannot find the file specified. Also I don't want the pdf to open up either.

Code is as below:

private void print()
    {
        ProcessStartInfo infoPrintPdf = new ProcessStartInfo();
        string pathPdf = @"E:\eSAFE\FileStore\PDF\Account Statement_76876876878_040111_000018473018_20160620172958468.pdf";
        infoPrintPdf.FileName = pathPdf;
        // The printer name is hardcoded here, but normally I get this from a combobox with all printers
        string printerName = @"\\10.15.0.8\NTP Printer 001 SecondFloor";
        //string printerName = "HP LaserJet Professional P1606dn";
        string driverName = "hp1100sd.dll";
        string portName = "10.15.0.23";
        infoPrintPdf.FileName = @"C:\Program Files (x86)\Adobe\Reader 11.0\Reader\AcroRd32.exe";
        infoPrintPdf.Arguments = string.Format("/t {0} \"{1}\" \"{2}\" \"{3}\"",
            pathPdf, printerName, driverName, portName);
        infoPrintPdf.CreateNoWindow = true;
        infoPrintPdf.UseShellExecute = false;
        infoPrintPdf.WindowStyle = ProcessWindowStyle.Hidden;
        Process printPdf = new Process();
        printPdf.StartInfo = infoPrintPdf;
        printPdf.Start();

        // This time depends on the printer, but has to be long enough to
        // let the printer start printing
        System.Threading.Thread.Sleep(10000);

        if (!printPdf.CloseMainWindow())              // CloseMainWindow never seems to succeed
            printPdf.Kill(); printPdf.WaitForExit();  // Kill AcroRd32.exe

        printPdf.Close();  // Close the process and release resources

    }

我的尝试：



代码如下：

What I have tried:

Code is as below:

private void print()
    {
        ProcessStartInfo infoPrintPdf = new ProcessStartInfo();
        string pathPdf = @"E:\eSAFE\FileStore\PDF\Account Statement_76876876878_040111_000018473018_20160620172958468.pdf";
        infoPrintPdf.FileName = pathPdf;
        // The printer name is hardcoded here, but normally I get this from a combobox with all printers
        string printerName = @"\\10.15.0.8\NTP Printer 001 SecondFloor";
        //string printerName = "HP LaserJet Professional P1606dn";
        string driverName = "hp1100sd.dll";
        string portName = "10.15.0.23";
        infoPrintPdf.FileName = @"C:\Program Files (x86)\Adobe\Reader 11.0\Reader\AcroRd32.exe";
        infoPrintPdf.Arguments = string.Format("/t {0} \"{1}\" \"{2}\" \"{3}\"",
            pathPdf, printerName, driverName, portName);
        infoPrintPdf.CreateNoWindow = true;
        infoPrintPdf.UseShellExecute = false;
        infoPrintPdf.WindowStyle = ProcessWindowStyle.Hidden;
        Process printPdf = new Process();
        printPdf.StartInfo = infoPrintPdf;
        printPdf.Start();

        // This time depends on the printer, but has to be long enough to
        // let the printer start printing
        System.Threading.Thread.Sleep(10000);

        if (!printPdf.CloseMainWindow())              // CloseMainWindow never seems to succeed
            printPdf.Kill(); printPdf.WaitForExit();  // Kill AcroRd32.exe

        printPdf.Close();  // Close the process and release resources

    }

推荐答案

由于非常明显的原因，您无法在Web应用程序中以静默方式执行任何操作。想象一下你会发现一些悄悄使用客户端打印机的技巧，首先，这意味着在未经用户同意的情况下使用打印机（可能存在或不存在）;然后想象用户弄清楚它为什么会发生。我怀疑用户会再次使用你的网站。



预留Web，即使在桌面应用程序中，也不应该静默打印：1）打印机属于用户，不是到你的申请; 2）印刷应该是罕见的事件;随着计算为社会铺平道路，人们打印得更少，节省纸张和碳粉;故意强迫用户打印是一种犯罪。



此外，PDF不是网络内容;它不是W3标准的一部分。不要被浏览器经常将PDF显示为网页这一事实所困惑;这都是非标准功能。因此，对于PDF，最好的策略是在通常的HTML锚点中提供简单的PDF文件。用户更了解如何处理它。打印该资源是PDF软件的工作，您没有和不能控制它;只有用户管理这些东西。

-SA

You cannot do anything silently in a Web application, by pretty obvious reasons. Imagine for a second that you find some trick to use client's printer silently, which, first of all, means using a printer (which may or may not even exist) without the user's consent; and then imagine that the user figured out why it happens. I doubt the user would use your site again.

Set aside Web, even in a desktop application, nothing should print silently: 1) printer belongs to the user, not to your application; 2) printing should always be a rare event; as computing paves its way to the society, people print less and save paper and toner; deliberately forcing the user to print is a kind of crime.

Moreover, PDF is not a Web content; it is not a part of W3 standard. Don't be confused by the fact that browser's often show PDF as a Web page; this is all non-standard feature. Therefore, for PDF, the best strategy is simple provide a PDF file in a usual HTML anchor. The user knows better what to do with it. Printing of that resource is the work for a PDF software, which you don't have and don't control; only the user manages this stuff.

—SA

你似乎错过了一个概念。这可以在您的开发机器上正常工作和打印。当您将此Web应用程序部署到生产Web服务器时，它将不起作用，因为ASP.NET代码完全在服务器端运行，从不在客户端上运行，并且无法访问连接到客户端计算机的任何打印机。



除非你有一台连接到网络服务器的打印机（我严重怀疑它并建议不要做这样的事情），你不能用这段代码打印任何东西。

You seem to be missing a concept. This works and prints fine on YOUR DEVELOPMENT MACHINE. When you deploy this web application to a production web server, it will NOT work as ASP.NET code runs entirely server-side, NEVER on the client, and will NOT have access to any printers attached to the client machine.

Unless you have a printer connected to the web server (I seriously doubt it and recommend against doing such a thing), you cannot print anything using this code.

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