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Troubleshooting
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Web Page Frames There might be times when a Web page is opened in Excel, but nothing is there. Don t worry, you did open the page correctly, but Excel can t open Web pages that contain frames. A frames page allows a single Web page to be divided into sections that each displays a sep arate Web page. Each of these sections is called a frame. The frames page is the container that hosts the group of frames. Excel can t open a Web page that contains a frames page. If you know how to work with HTML source code, you can use an HTML editor to copy the information you want, without the frames page code, to a new file. When the new file has been created, you can open it in Excel.
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Part 6: Excel and the Outside World: Collaborating Made Easy
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Excel and the Web
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Using Web Queries
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Web Queries were introduced in Excel 97 and have been enhanced with each subsequent version of Excel. They allow you to retrieve a single table of information from a Web page, with options to automatically refresh the data each time the workbook is opened, or at spe cific intervals. One of the problems with Web Queries is that Excel uses the thousands and decimal separa tors specified in the Windows Regional Settings when attempting to recognize numbers in the page. If, for example, an exchange rate Web page is retrieved from one of many European countries, the period is treated as a thousands separator, not a decimal separator, resulting in exchange rates that are many times too large. Therefore, Web Queries couldn t be reliably used in versions prior to Excel 2002 in countries that used non-U.S. format decimal and thousand separators. However, now there s a workaround for this problem. There are three properties to the Application object to temporarily override the settings used when recognizing numbers. The following properties are available:
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Application.DecimalSeparator Application.ThousandsSeparator Application.UseSystemsSeparators
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25
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Using these properties, you can set Excel s separators to match those on the Web page, perform the query, and then set them back again. If you want to use the Web Query s automatic refreshing options, you have to set these separators in the BeforeRefresh event and set them back in the AfterRefresh event. To capture these events, class modules need to be set up. The following procedure demonstrates how to retrieve the table of exchange rates using a Web Query created within the procedure. Note
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The RetrieveWebQueryData procedure imports the table of exchange rates into the Excel workbook. If you don t see the Exchange Rates in the workbook, verify which table you need to import. The sidebar That Was Table Number 2 , on p. 531, explains this scenario.
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Sub RetrieveWebQueryData() ActiveWorkbook.Worksheets.Add With ActiveSheet.QueryTables.Add(Connection:= _ URL;http://www.fms.tre as.gov/intn.html", Destination:=Range( A1 )) .Name = USD" .FieldNames = True .RowNumbers = False .FillAdjacentFormulas = False .PreserveFormatting = True .RefreshOnFileOpen = False .BackgroundQuery = True .RefreshStyle = xlInsertDeleteCells
Part 6: Excel and the Outside World: Collaborating Made Easy
Microsoft Office Excel 2003 Programming Inside Out
.SavePassword = False .SaveData = True .AdjustColumnWidth = True .RefreshPeriod = 0 .WebSelectionType = xlSpecifiedTables .WebFormatting = xlWebFormattingNone .WebTables = 2" .WebPreFormattedTextToColumns = True .WebConsecutiveDelimitersAsOne = True .WebSingleBlockTextImport = False .WebDisableDateRecognition = False .WebDisableRedirections = False .Refresh BackgroundQuery:=False End With End Sub
Part 6: Excel and the Outside World: Collaborating Made Easy
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The .WebTables = 2 line in the preceding example tells Excel that you want the third table on the page. Literally, this is the third occurrence of a <TABLE> tag in the source HTML for the page. With Excel, you have the ability to incorporate data that you locate from the Web into your spreadsheets. It s not necessary to know how the page was created or how to create a query file. You can select the data you want, and once the information is imported into the spreadsheet, you can refresh the data with a single click of the mouse. Alternatively, the data can be refreshed when the workbook is opened, or at specific time intervals. You can alternatively create a new Web Query using the Import External Data feature within Excel. Follow these steps outlined to review how to navigate through the dialog box.
1 Click Data, Import External Data, and then New Web Query. 2 Type the Web page URL in the Address text box. 3 Click the Go button to show the Web page within the New Web Query dialog box. Notice the arrows that appear on the Web page. The arrows when selected will outline the entire table to be imported into your worksheet. 4 Select the table to import. When the table is selected, the arrow changes to a check mark as displayed in Figure 25-5. 5 Click the Import button. 6 Two options are available to place the contents of the Web query. Select Existing Worksheet if you want to display the data in the active worksheet, or select New Worksheet if you want the data to be placed in a new sheet.
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