barcode

问题 I have a project-wide exception handler in my Windows CE app that is logging this when my app crashes in a specific scenario: Message: From application-wide exception handler: System.NullReferenceException: NullReferenceException at HHS.FrmDelivery.ReaderForm_Activated(Object sender, EventArgs e) at System.Windows.Forms.Form.OnActivated(EventArgs e) at System.Windows.Forms.Form.WnProc(WM wm, Int32 wParam, Int32 lParam) at System.Windows.Forms.Control._InternalWnProc(WM wm, Int32 wParam, Int32

问题 I am currently writing an application for Panasonic's TOUGHPAD FZ-E1 and I have problems software triggering the barcode scanner. I know this is possible because the demo app that came with it does that. My code is written in C# according to the Microsoft documentation provided here https://msdn.microsoft.com/en-us/library/dn792056(v=winembedded.81).aspx[^] The app crashes when I call this method: private async void SoftwareTrigger_Click(object sender, RoutedEventArgs e) { if (scanner

问题 I want to read the barcode and print it in a console in a simple java program as soon as the barcode scans on top of any barcode. Is there any way? 回答1: final Scanner scanner; try { scanner = new Scanner(); try { scanner.release(); scanner.close(); } catch (Exception e) { } scanner.open("MotorolaScannerUSB"); scanner.claim(100); scanner.setDeviceEnabled(true); scanner.setDataEventEnabled(true); scanner.addDataListener(new DataListener() { public void dataOccurred(DataEvent arg0) { Scanner scn

问题 I am building an iOS, code scanner project using ZBar SDK. I am trying to build my project directly from the source of ZBar, rather than including the libzbar.a static library. Here are the steps i did 1) Copied the source file to my project. 2) Added the path to the folder containing the source and headers to the Header Search Paths build setting of the project. (eg include/ZBarSdk) 3)Added the following user defined build setting to the project: EXCLUDE_SOURCE_FILE_NAMES USE_HEADERMAP But

问题 I'm making an application that produce barcode labels. I'm using Sato LM408e thermal printer. In order to print i'm using sbpl command. I got no error but the printer doesnt print anything. Is there anyone who has experience printing with sato barcode printer? lm 408e to be more specific My Code: PrintDialog printDia = new PrintDialog(); printDia.PrinterSettings = new PrinterSettings(); DialogResult result = printDia.ShowDialog(); StringBuilder sb = new StringBuilder(); sb.AppendLine("<STX>

问题 I have this output of a decoded QR barcode, does this code has a meaning or can I interpret these symbols to a meaningful output? Is there any algorithm to interpret the output of decoding QR? output: LWludGVydmlldy5zMy5hbWF6b25hd3MuY29tL 回答1: This string: LWludGVydmlldy5zMy5hbWF6b25hd3MuY29tL is a Base64 representation of: -interview.s3.amazonaws.com However, this is not related to QR Codes. The person who created that QR Code arbitrarily decided to encode its content as Base64. If you're

问题 i'm working on a project that will need to have everything shown with barcodes, so I've generated 7 numbers for EAN8 algorithm and now have to get these 7 numbers seperately, right now i'm using for the generation $codeint = mt_rand(1000000, 9999999); and I need to get this 7 numbers each seperately so I can calculate the checksum for EAN8, how can i split this integer to 7 parts, for example 12345678 to arr[0]=1 arr[1]=2 arr[2]=3 arr[3]=4 arr[4]=5 arr[5]=6 arr[6]=7 any help would be

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed last year . I'm writing a commercial app that we anticipate will require about 50,000 UPC look ups per month. For now, I'm just looking for a database that supports UK/USA codes. I've read a few posts here that keep sending me to UPC Database. However, this limits searches to only 1000 per day and gives no guarantee of up

问题 here is my code to focus on "text2display" if clicked anywhere on the form (which is in a popup). but, how if they "tab" and navigate elsewhere (e.g. browser url), how to detect that and return focus back to ""text2display"? $("#barcode_form").click(function(){ var focusedElement = ""; $(":focus").each(function(){ focusedElement = $(this).attr("id") }); if(focusedElement == ""){ $('#text2display').focus() } }) 回答1: You'll be wanting the .blur(); function. Whenever an element has "focus" and

问题 Hi I am using below code and the bar code is generating well but how can I remove text written down to label. public void generateBarcode(string id) { int w = id.Length * 55; Bitmap oBitmap = new Bitmap(w, 100); Graphics oGraphics = Graphics.FromImage(oBitmap); Font oFont = new Font("IDAutomationHC39M", 18); PointF oPoint = new PointF(2f, 2f); SolidBrush oBrushWrite = new SolidBrush(Color.Black); SolidBrush oBrush = new SolidBrush(Color.White); oGraphics.FillRectangle(oBrush, 0, 0, w, 100);