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Title: Software/Bar Code - Internet Barcode Implementation FAQ and Tutorial Discusses screen resolutions, advantages and disadvantages of various implementations, and the reading of barcodes via web applications.
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Internet & Web Barcode Integration Tutorial by IDAutomation®Home: Products:  Internet & HTML Web Page Barcode Implementation FAQ and Tutorial:

Internet & Web Page Barcode Implementation Tutorial

To sign up for monthly updates about new products or upgrades, please click here.Implementing internet web barcode technology is often useful for the automation or verification of something that must be printed, such as airline boarding passes and tickets, invoices and receipts, coupons, name badges, check-in confirmations, registrations, rebate mailers, RMA packing slips, gift certificates and more. In this tutorial, several differentmethods of creating barcodes over the Internet in HTML webpages and web applications are evaluated withon-line demos andimplementation examples. This site also includes information about how to scan barcodes into web applications with abarcode scanner.Products for Printing Barcodes Over the Internet There are many advantages and disadvantages for the various products used to display barcodes on the web. These implementations are listed on the chart below, in order, with the most popular and recommended options at the top: INDEX:ASP .NET Server ControlDynamic Barcode Generator ServiceJava ServletsNative JavaScript Barcode Generator ASP Barcode Server Component for IISXML Web ServicesJava AppletsBarcode ActiveX ControlsTrueDoc or OpenType Barcode FontsBarcode FontsWeb Browser and Screen Resolution IssuesReading Barcodes With Web ApplicationsImplementation TypeAdvantagesDisadvantagesASP Barcode Server Component for IISOnline DemoEasily installs on Windows NT, XP, Vista, 2000, 2003 and 2008 Server with IIS enabled.The mature components of this barcode product have been in use since 2002 and are used in IDAutomation'sBarcode Generator Service.No temp files are created on the server because the resulting barcode image is sent directly to the browser as a binary stream.Can beeasily implemented in ASP, JavaScript, PHP and other web applications as a dynamic <IMG> tag.Because a GIF or JPEG is generated at the server, it is compatible with all web browsers.Easily creates barcodes in any application that can access a URL, includingCrystal Reports andFileMaker.Image is not limited to 96 DPI, however changing the resolution from 96 DPI requires someHTML coding. Offers better performance for workstations with slower CPUs.Requires a Microsoft Windows server with IIS and the .NET Framework installed.Centralized barcode processing and image generation places more load on the server. However, this product is extremely efficient.Low resolution thermal printer use is not directly supported. To use thermal printers with this product, refer to theprinting to thermal barcode printers from the web browser article.ASP.NET Server ControlOnline DemoBarcodes are created as high quality GIF, JPEG or PNG graphic images.100% managed code created in C# .NET for performance and stability.Because a high-quality barcode image is generated at the server, it is compatible with all web browsers.Offers better performance for workstations with slower CPUs.Resolution of the barcode image is easily changed to allow compatibility with thermal printers.Requires ASP.NET and a development environment that makes use of server controls, such as Microsoft Visual Studio .NET.Centralized barcode processing and image generation places more load on the server. Generates temp files on the server. However, these are automatically deleted by the server control itself after a specified time.Dynamic Barcode Generator ServiceOnline DemoNo software to install - It is a hosted, managed and fault tolerant service. Multiple backbone and failover network connections insure quick response time and dependability.Streaming mode option sends barcodes to the browser without saving temp files on the server.Barcodes are created as high quality GIF, JPEG, or PNG graphic images.Because a high quality barcode image is generated at the server, it is compatible with all web browsers.Image is not limited to 96 DPI, however changing the resolution from 96 DPI requires someHTML coding.Barcodes will not be created if there is a loss of connectivity to the Internet.Printing to low resolution thermal printers is not recommended with this product. To use thermal printers, refer to theprinting to thermal barcode printers from the web browser article.Java ServletsOnline DemoMay be easilyimplemented on dynamic webpages with the <IMG> tag.Easy to use withApache Tomcat.Because a JPEG is generated at the server, it is compatible with all web browsers.No temp files are created on the server, the resulting barcode image is sent directly to the browser as a binary stream.Offers better performance for workstations with slower CPUs.Image is not limited to 96 DPI, however changing the resolution from 96 DPI requires someHTML coding.Requiresservlet configuration on the server.Centralized barcode processing and image generation places more load on the server.Low resolution thermal printer support is possible but not recommended. To use thermal printers with servlets, refer to theprinting to thermal barcode printers from the web browser article.Native JavaScript Barcode Generator Online DemoEasy implementation with a single JavaScript file, no additional components, fonts or plug-ins need to be installed to create barcodes; it is the complete barcode generator.Since the barcode is generated on the client, very little processing needs to be performed on the server. The size of the JavaScript file downloaded to the client is as small as 3 kb.When printing, this product rasters to the resolution of the output device.Requires JavaScript to be enabled in the browser.Some browsers such as Opera and Safari may create the barcode to be slightly wider in certain situations. However, the main browser types such as IE, Mozilla Firefox and Netscape do not have this issue.XML Web ServicesOnline DemoEasy to install; runs on Windows Server.Barcodes are created as high quality JPEG, PNG, GIF, TIFF, BMP or WMF graphic images.Created image is streamed to the client over XML.100% managed code created in C# for performance and stability.Compatible with any application that can consume web services.Only integrates into applications that can consume a Web Service.Java AppletsOnline DemoEasy to install and modify.Does not require any custom modifications to the server.Processing occurs at the workstation which offloads the processing of barcode images from the server.The small size of the JAR files provide quick applet load times.Quick barcode generation can be achieved over slow connections bypre-loading applets.Some browsers display but do notprint applets.Image is limited to 96 DPI.Although the JAR files are small, the browser must read the JAR file which can cause poor performance over slow dial-up lines. The JAR is about the size of a normal graphic image and is stored in the browser's cache. This problem is solved bypre-loading applets.Not compatible with browsers that do not have a Java VM.Barcode ActiveX ControlsOnline DemoBarcode ActiveX Controls are precise and efficient, they are not limited to 96 DPI but they automatically raster to the output device (such as a printer) which produce extremely high-quality barcodes.Easy to install and modify in HTML or with FrontPage.Does not require any custom modifications to the server.Processing occurs at the workstation which offloads the processing of barcode images from the server.May be automatically loaded from webpages withsigned CAB files, which are provided in the latest versions of the product.Only compatible with Internet Explorer 4 and above as well as other browsers that support ActiveX Controls.The control must be installed on every PC that displays the barcodes, however, this may be automated byusing CAB files.Easy to install and modify.TrueDoc or OpenType Barcode FontsOnline DemoBarcode fonts are precise and efficient; they are not limited to 96 DPI but raster to the output device.Since the barcode is generated from a font, very little processing needs to be performed on the workstation or the server.Quick browser load time since the fonts are usually less than 20K.When printing to thermal barcode printers with fonts, refer to thethermal bar code printer issues with fonts article.This implementation is problematic and does not work with all browsers and is no longer recommended.Requires the purchase of a Developer license and a conversion tool. The conversion tool forOpenType fonts is free at the Microsoft website.Barcode FontsWorks well with all browsers on Windows and Macintosh.Fonts are precise and efficient.Fonts are not limited to 96 DPI but raster to the output device. However, to print accurate bar-codes on 203 and 300 DPI printers, refer to thefont print quality KB article.Since the barcode is generated from a font, very little processing needs to be performed on the workstation or the server.Works well with all web browsers on Windows and Macintosh, but may not work well with UNIX clients.Requires the installation of barcode fonts on all clients that display the barcodes with the browser. Therefore, this is only recommended for Intranet applications.Web Browser and Screen Resolution Issues When implementing barcodes on the web, most browsers will display and print from the screen image at 96 DPI. Therefore, a 300 dpi image will appear and print about 3 times larger than normal. This can sometimes be a problem if the barcodes being created require precise X dimensions (the width of the narrow bar). The minimum allowable X dimension (the width of the narrow bar) of a browser barcode that uses an applet to display a barcode must be a multiple of 1/96 of an inch which is about 12 mils, or .03CM. Most ISO and AIM standards indicate that the minimum X dimension should be 10 mils for open systems (meaning compatibility with different barcode scanners), so this is usually not an issue. However, there are some situations when the X dimension needs to be defined more accurately. For example, if an application requires an X dimension of 5 mils or 15 mils, this problem can be resolved by using products that support this capability. To understand more about this, please refer to theAchieving the correct X dimension with web products KB article. 96 DPI images can also cause problems when printing to 203 DPI thermal barcode printers. This problem can be resolved by using products that support the capability to print at 203 DPI as mentioned below. To understand more about this, refer to theprinting to thermal barcode printers with web products article.Reading Barcodes With Web ApplicationsTo sign up for monthly updates about new products or upgrades, please click here.The majority of the barcode scanners provided by IDAutomation have built-in decoders that automatically read several barcode types and perform "keyboard emulation" by default. They receive their power from the PC keyboard or USB port so no external power supply is required. When a barcode is scanned withthese easy to use scanners, the data is sent to the PC as if it had been typed from the keyboard. When the data is sent in keyboard emulation mode, it is possible to use these scanners as easy input devices to online web applications by placing the cursor in the appropriate field and scanning the barcode. Additional information about scanning barcodes into applications is provided in theUSB Barcode Scanner Application Integration Guide.  Product Quick Links: [Barcode Fonts | Font Tools |Components | Label Software | Scanners |Printers |RFID |Product Index]© Copyright 2000-2008 IDAutomation.com, Inc., All Rights Reserved. Legal Notices. Over 70% of Fortune 100 companies use IDAutomation’s products to automate their businesses. _uacct = "UA-2123927-2";urchinTracker();
 

Discusses

screen

resolutions,

advantages

and

disadvantages

of

various

implementations,

and

the

reading

of

barcodes

via

web

applications.

http://www.idautomation.com/internet-barcode-faq.html

Internet Barcode Implementation FAQ and Tutorial 2008 October

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dvd


Discusses screen resolutions, advantages and disadvantages of various implementations, and the reading of barcodes via web applications.

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