printing

问题 I know how to get the list of all of the installed printers on a machine with .Net: foreach (String printer in PrinterSettings.InstalledPrinters) { Console.WriteLine(printer.ToString()); } Console.ReadLine(); InstalledPrinters is just a list of strings though. Is there any way to get the installed printer objects that contain both the name and the icon image that I would ordinarily see under "Devices and Printers" in the Windows Explorer? 回答1: The icon is normally embedded into either one of

问题 I'm building an ASP.NET application that requires printing using PrintDocument method: PrintDocument.Print() Printing works properly in development env with IIS express. when publishing it to an intranet IIS server, printing fails, which I think is caused by permission issue for aspnet working process. I tried to do the following with no success: I created an application pool in integrated pipeline mode for an admin local user with load user profile option set to true I moved the application

问题 Is there a way to track if a user prints a web page? Thanks, Graham 回答1: @Tahir Akhtar had the idea of using a print stylesheet. According to the comments, that doesn't work because the stylesheet is always fetched , regardless of whether the browser currently is in print view or not. How about taking this further: Use a print stylesheet and define a style in it that makes the browser fetch a certain resource when it's rendered . The resource would return a transparent image. As for the

问题 Suppose I have a function such as: ff <- function(x) { cat(x, "\n") x^2} And run it by: y <- ff(5) # 5 y # [1] 25 My question is how to disable or hide the 5 printed from cat(x, "\n") such as: y <- ff(5) y # [1] 25 回答1: You can use capture.output with invisible > invisible(capture.output(y <- ff(2))) > y [1] 4 or sink > sink("file") > y <- ff(2) > sink() > y [1] 4 回答2: Here's a nice function for suppressing output from cat() by Hadley Wickham: quiet <- function(x) { sink(tempfile()) on.exit

问题 This question already has answers here : How can I send a file document to the printer and have it print? (11 answers) Closed 6 years ago . I'm programming a web application with Visual Studio 2010 (C#). I want to send a PDF (saved in my computer) to a printer when I click a button. To create the PDF I used iTextSharp. I tried this, but it just opens Adobe Reader: proc.StartInfo.FileName = @"C:\Archivos de programa\Adobe\Reader10.0\Reader\AcroRd32.exe"; proc.StartInfo.Arguments = String

问题 This question already has answers here : String formatting: % vs. .format (16 answers) Closed 4 years ago . In Python there seem to be two different ways of generating formatted output: user = "Alex" number = 38746 print("%s asked %d questions on stackoverflow.com" % (user, number)) print("{0} asked {1} questions on stackoverflow.com".format(user, number)) Is there one way to be preferred over the other? Are they equivalent, what is the difference? What form should be used, especially for

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: “Silent” Printing in a Web Application I'd like the window.print() command to print directly, without opening the print window: Is that possible? 回答1: try For Mozilla : http://forums.mozillazine.org/viewtopic.php?t=48336 When you use JavaScript's window.print() to print a Web page in IE, by default, it prompts IE's printer dialog box. To avoid this, use the following JavaScript code: if (navigator.appName ==

问题 I have an app developed on Android versions 4.0 and above. ( The app does not support Android versions below 4.0 [Ice Cream Sandwich] ). The question is related to (print) DPI of various images ( for eg. of jpeg or png ) format. This question does NOT relate to SCREEN DPI or sizes of various Android devices. It is also NOT related to showing the Bitmap on the device in screen size. I am using the following code to load the image file in 'Bitmap'. Then I have been cropping it and saving it to

问题 I am researching a potential app for a client, and I had a question I wasn't able to find the answer on. What I would like to do is print automatically, without having the UIPrintInteractionController get displayed. An important point I should make is this will not be a production app. I know that otherwise this could violate the user's privacy to just print without the user's consent, but again this will not be a public app on the App Store. One app I found that seems to be able to this is

问题 I want to print the content of a div using jQuery. This question is already asked in SO, but I can't find the correct (working) answer. This is is my HTML: <div id='printarea'> <p>This is a sample text for printing purpose.</p> <input type='button' id='btn' value='Print'> </div> <p>Do not print.</p> Here I want to print the content of the div printarea . I tried this: $("#btn").click(function () { $("#printarea").print(); }); But it gives a console error when the button is clicked: Uncaught