generate barcode image vb.net 17: Making the Web Application Available to Our Users in C#

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17: Making the Web Application Available to Our Users
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Figure 17-2
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These steps will create the installation program, so we can now go ahead with the installation Start by locating the installation program if you kept the default locations of files, the installation should be located at this location: \documents and settings\login name\My Documents\Visual Studio Projects\DeployTest\DeployTest\Debug\WebDeploymsi Navigate to the installation file and run it from that location The web application will be installed the installation screen is shown in Figure 17-3 Once the application is installed, go ahead and test it: the URL should be http://localhost/Tester To uninstall the application, select Start | Settings | Control Panel, and double-click the Add/Remove Programs icon In the Add/Remove Programs utility, select the application to be removed, and click Remove, as shown in Figure 17-4
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Figure 17-3
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17: Making the Web Application Available to Our Users
Assemblies and the GAC
Up until this point, we have used assemblies that are located in the /bin directory of the web application and thus are private to the application One of the strengths of the NET Framework, however, is the option to share assemblies between multiple applications that is the GAC (Global Assembly Cache) Assemblies are registered in the GAC by using the gacutil command-line utility For more information on assemblies and the use of gacutil, see 6 One important point about assemblies is that you can keep multiple versions of the same assembly available for applications that need access to a particular version this is called side-by-side versioning The search for a suitable version of an assembly always starts in the local /bin directory of the web application and then proceeds to the GAC, where multiple versions can be maintained PART III EXAM TIP The NET Framework supports multiple versions of the same assembly in the GAC
Installing a Web Application
For ASPNET to work, you need to have the right software installed on your workstation for development, and on your servers for the production environment Even though Windows 98 and Windows Me are 32-bit operating systems, they are not supported for development of web applications as they do not have a version of IIS (Internet Information Server) available, nor is there a version available for the Windows NT 4 family of operating systems The current version of IIS is 50, and it is only available for Windows 2000 and Windows XP Those are the only operating systems that can be used to develop web applications with ASPNET, and the only ones you can use for production servers IIS is installed by default on all Windows 2000 servers (Server, Advanced Server, Application Center Server, and Datacenter Server) but not on Windows 2000 Professional It is also possible that the operating system installer removed IIS from the installation, based on installation standards Under those circumstances you will need to install IIS EXAM TIP IIS is not installed by default on Windows 2000 Professional or Windows XP Professional To be able to develop XML Web Services, your system also needs to have the FrontPage Server Extensions installed and properly configured
Installing IIS
To install IIS on a Windows 2000 computer, you must have administrative permissions before you start the installation If you cannot get administrative rights, you will need to have your computer support group perform the installation
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To install IIS follow these instructions: 1 In the Control Panel (Start | Settings | Control Panel), open the Add/Remove Programs utility 2 Select Add/Remove Windows Components on the left of the Add/Remove Programs dialog box 3 Select Internet Information Services
4 Do not add any additional services nor change the defaults for IIS without consulting a security expert 5 Insert the installation CD if prompted 6 Repair the NET Framework installation to use IIS by inserting the Visual Studio NET Windows Component update CD in your CD drive and running the following command (assuming D:\ is your CD drive): D:\dotNetFramework\dotnetfxexe /t:c:\temp /c:"msiexecexe /fvecms c:\temp\netfxmsi" 7 Immediately connect to the Windows update site at Microsoft to apply any and all security patches and service packs CAUTION IIS is designed to allow other computer users access to web applications on the computer, so it is imperative that you install all available security patches
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