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You can move this function to a public module, if you want, and call it with a specific path you want to use for your data access pages. If the function detects that a path parameter has not been supplied, it uses the current location of the database and assumes the data access page .htm file is in the \Webs\DataAccessPages subfolder. The code looks at each data access page object in the database. It uses the Dir function to see if the path and file specified in the FullName property of the first data access page exist. If it finds that the first one is good, it assumes all are fine. When the code finds that the path to the first data access page is bad, it loops through all pages to update both the link and the connection. For each page, the code first verifies that it can find the HTML file in the expected location. If any fail, the code displays an error message and exits. Note that if the object name and the file name are different, this technique won t work. If the code finds the file in the expected location, it updates the FullName property of the page to correct the link. The code then opens the DAP in Design view and changes the ConnectionString property of the MSODSC object on the page. If the function causes any errors, the error trapping code at the end of the function executes. The error trap notifies you of the error and doesn t attempt to fix any additional pages.

Console.WriteLine((string)dddBook + " is in the: " + categoryPath + " category.");

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After you have finished developing your data access pages and have corrected the connection properties so that all clients can access your database, you need to upload or publish your files to your Web server. If your Web server is available via a network share, you can simply copy the files using Windows Explorer. Be sure to also copy any supporting folders and files. For example, if you have applied a theme to any of your pages, you ll find the files needed to apply the theme in a subfolder that has the same name as the data access page with _Files appended to the name. Note If you used FrontPage to incorporate your pages into a FrontPage Web, you should use FrontPage to publish your pages. This ensures that all supporting files needed by FrontPage are copied to the server. See Microsoft Office FrontPage 2003 Inside Out for details. Locating the correct path name on your Web server can be somewhat tricky. In most cases, the path and file name portions of a Universal Resource Locator (URL) correspond directly to a portion of the Web server s file system, starting at a spot called the HTTP root. For example, if the server s HTTP root is F:\InetPub\wwwroot\ and the F: drive on that server has a share name of \\WebServer\FDrive, then the URL http://www.proseware.com/default.htm corresponds to \\WebServer\FDrive\InetPub\wwwroot\default.htm on the Web server. Similarly, http://www.proseware.com/housing/default.htm points to \\WebServer\FDrive\InetPub\wwwroot\housing\default.htm on the Web server.

Building Data Access Pages Note Occasionally, an administrator will break the pattern of defining all subdirectories under the root of the Web by defining a virtual directory. Web visitors normally specify the virtual directory in a URL, but the Web server translates the URL to some location outside the normal HTTP root. If, in the second example above, housing is a virtual directory assigned to G:\HousingApp\Res, the file name corresponding to http://www.proseware.com/housing /default.htm would be G:\HousingApp\Res\default.htm. You must know the share name to this drive or folder to be able to copy your files to the correct location.

Methodologies for good computer application design were first devised in the 1960s by recognized industry consultants such as James Martin, Edward Yourdon, and Larry Constantine. At the dawn of modern computing, building an application or fixing a broken one was so expensive that the experts often advised spending 60 percent or more of the total project time getting the design right before writing a single line of code. Today s application development technologies make building an application much cheaper and quicker. In fact, the pace of computing is several orders of magnitude faster than it was just a decade ago. An experienced user can sit down with Microsoft Access on a PC and build in an afternoon what took months to create on an early mainframe system (if it was even possible). Today s technologies also give you the power to build very complex applications. But even with powerful tools, creating a database application (particularly a moderately complex one) without first spending some time determining what the application should do and how it 53

Microsoft Office Access 2003 Inside Out should operate invites a lot of expensive time reworking the application. Even though it s easier than ever to go back and fix mistakes or to redesign on the fly, if your application design is not well thought out it will be expensive and time-consuming later to track down any problems or to add new functionality. The following is a brief overview of the typical steps involved in building a database application.

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