Restricting File Types in Visual Studio .NET

Drawing QR Code JIS X 0510 in Visual Studio .NET Restricting File Types

In 4, I explain that you can use the Advanced Search form to restrict a search to a specific type of file For example, you can restrict your file types to Adobe Acrobat (pdf), Postscript (ps), Microsoft Word (doc), Microsoft Excel (xls), Microsoft PowerPoint (ppt), or Rich Text Format (rtf) formats The filetype: operator provides the same functionality as the File Format drop-down list in the Advanced Search form It also allows you to restrict searches to some additional file formats To restrict a search to a specific format, use the filetype: operator followed by the file extension, and then type your search term Restricting a search using file format can narrow results and make the search more accurate under the right circumstances For example, if you re looking for a scholarly paper, restricting your search to Adobe Postscript might make sense If you expect to find answers in a business presentation, it might help to restrict your search to Microsoft PowerPoint files Owners manuals and other documentation found online are often meant to be view as Adobe Acrobat (pdf) files So restricting your file format to Acrobat might make sense if you are looking for product documentation For example, suppose you want to find the operating manual for a Panasonic High Definition Plasma television If you know the television s model number, you can do the most precise search possible by narrowing your search down by file format, like this:

This search returns all PDF files that contain the string TX-42PX25U/P Included in the results set is a link to the product s operating manual, as you can see in Figure 5-4

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Figure 5-4: Restricting file formats can help you find authoritative information, such as this product manual

Google has the ability to automatically convert the files it understands to HTML (or to text if they cannot be converted to HTML) This means that you don t need to have any special software to view these files For example, suppose you don t have Acrobat Reader and want to view the PDF file whose snippet is shown in Figure 5-4 Simply click the View as HTML link

returns sites that contain links to wwwresearchbuzzcom, as you can see in Figure 5-5 Webmasters can use the information provided by the link: operator in a number of ways: To help understand their own page s PageRank To find out about the sites that link to their site To find out which sites link to competitors sites (and perhaps can be persuaded to add another link as well)

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link:

Researchers can use the information provided by the link: operator as: A rough indication of a site s credibility: You can generally regard pages with many links as inherently likely to be credible or at least many Webmasters have thought so The fact that researchbuzzcom has links, also called back links, from some 1,700 other pages makes it a credible source for information about the online research business But researchbuzzcom is not as credible as the New York Times, with more than 73,000 back links (By comparison, wwwgooglecom has over 2,500,000 back links) A helpful navigation tool: The link: search results for a page can also provide navigation help Suppose a page in a multipage article doesn t provide a link to the first page of the article, or to the table of contents for the material that includes the article Provided the site has been indexed by Google, the back links for the page should provide this navigation information