asp net mvc barcode scanner The Plug-in in Java

Generating EAN / UCC - 13 in Java The Plug-in

The Plug-in
Scan EAN / UCC - 13 In Java
Using Barcode Control SDK for Java Control to generate, create, read, scan barcode image in Java applications.
GS1 - 13 Creation In Java
Using Barcode creation for Java Control to generate, create GTIN - 13 image in Java applications.
function FromKeyCode(c) { switch (c) { case 8: return 'Backspace' case 9: return 'Tab' case 12: return 'Center' case 13: return 'Enter' case 16: return 'Shift' case 17: return 'Control' case 18: return 'Alt' case 19: return 'Pause' case 20: return 'Capslock' case 27: return 'Esc' case 33: return 'PgUp' case 34: return 'PgDn' case 35: return 'End' case 36: return 'Home' case 37: return 'left' case 38: return 'Up' case 39: return 'Right' case 40: return 'Down' case 45: return 'Ins' case 46: return 'Del' case 91: return 'Windows' case 93: return 'Menu' case 144: return 'Numlock' } return c }
Recognize EAN13 In Java
Using Barcode reader for Java Control to read, scan read, scan image in Java applications.
Barcode Creation In Java
Using Barcode creator for Java Control to generate, create barcode image in Java applications.
plug-In JavaScript: 100 power Solutions
Scan Bar Code In Java
Using Barcode recognizer for Java Control to read, scan read, scan image in Java applications.
European Article Number 13 Drawer In Visual C#
Using Barcode printer for .NET Control to generate, create EAN-13 image in .NET framework applications.
GetLastKey()
GS1 - 13 Creation In VS .NET
Using Barcode drawer for ASP.NET Control to generate, create GTIN - 13 image in ASP.NET applications.
EAN13 Printer In VS .NET
Using Barcode generator for .NET framework Control to generate, create EAN13 image in VS .NET applications.
This plug-in returns the value of whatever the last keypress was and then resets the stored value to the empty string to indicate that the key value has been retrieved Figure 3-7 shows a simple input function created using this plug-in
Encode EAN13 In VB.NET
Using Barcode creator for .NET framework Control to generate, create European Article Number 13 image in .NET framework applications.
UPC-A Supplement 5 Creation In Java
Using Barcode printer for Java Control to generate, create UPC-A Supplement 5 image in Java applications.
About the Plug-in
Encode Barcode In Java
Using Barcode printer for Java Control to generate, create bar code image in Java applications.
Matrix Barcode Drawer In Java
Using Barcode encoder for Java Control to generate, create 2D Barcode image in Java applications.
This plug-in doesn t take any arguments and returns the value of the most recently pressed key (if any)
USD - 8 Encoder In Java
Using Barcode generation for Java Control to generate, create Code11 image in Java applications.
Recognize Code 128C In None
Using Barcode scanner for Software Control to read, scan read, scan image in Software applications.
Variables, Arrays, and Functions
Data Matrix Generation In VS .NET
Using Barcode generation for Reporting Service Control to generate, create Data Matrix ECC200 image in Reporting Service applications.
UPC - 13 Generation In None
Using Barcode creation for Word Control to generate, create GS1 - 13 image in Office Word applications.
k Local string variable that holds the value of KEY_PRESS before resetting it and returning k
Paint Barcode In None
Using Barcode drawer for Font Control to generate, create bar code image in Font applications.
EAN 13 Drawer In None
Using Barcode generator for Office Excel Control to generate, create EAN13 image in Microsoft Excel applications.
How It Works
UCC - 12 Drawer In .NET
Using Barcode generation for .NET Control to generate, create EAN128 image in Visual Studio .NET applications.
GTIN - 12 Creation In None
Using Barcode drawer for Font Control to generate, create UPC-A Supplement 5 image in Font applications.
This plug-in assigns the value in KEY_PRESS, the global variable that contains the last key pressed, to the local variable k Then it resets KEY_PRESS to the empty string to show that the value has been read Finally, the contents of k is returned If there was no keypress, the empty string is returned
How To Use It
To use this plug-in, call it with no arguments and it will return either a letter, number, punctuation symbol, or a special key name If the key was none of these, then its code is returned You can use this plug-in to create a very simple input function, like this:
What is your name <b><span id='name'></span></b> <script> windowonload = function() { input('name') function input(id) { var interrupt = setInterval(simpleInterrupt, INTERVAL)
Figure 3-7 This plug-in can build an input function
3:
the Core plug-ins
function simpleInterrupt() { var k = GetLastKey() if (k == 'Enter') { k = '' clearInterval(interrupt) } O(id)innerHTML += k } } } </script>
To make this work, a span is created in which the input will be placed Then the JavaScript code makes a call to a new function called input(), passing the ID of the span The input() function then sets up a repeating interrupt using setInterval() to the subfunction simpleInterrupt() The simpleInterrupt() function then calls GetLastKey() each time it is called If the value is ever Enter , it means the user has pressed the Enter key and k is assigned the value (a period), and the interrupt is disabled using clearInterval(), with the interrupt ID previously assigned to interrupt Finally, the innerHTML property of the object indicated by id has the latest key value returned appended to it If the value is the empty string, then nothing is appended All your code has to do then is look at the end of the string to see if it is the period character to indicate that the user has pressed Enter Your code then removes that character and uses the remainder of the string Alternatively, you can use a different end of input marker Whatever you do, if you want to create your own input routine rather than use a ready-made one such as an <input type='text'> tag, you have to go through all these swings and roundabouts of interrupt driven calls, because that s the way JavaScript works However, at least you now have a way of doing so when you need it For a bit of fun, if you store the input somewhere hidden rather than in a span, you can check for a sequence of characters to be entered much like entering cheat codes into a game and if a recognizable sequence is entered, you can trigger a bonus feature
Copyright © OnBarcode.com . All rights reserved.