zxing create qr code c# Turning on the Label-Based Formula Feature in C#

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Turning on the Label-Based Formula Feature
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Inexplicably, the ability to use row and column labels as the basis for plain-English formulas is turned off by default. To make this functionality work, you have to do the following:
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1 Choose Tools, Options. 2 In the Options dialog box, click the Calculation tab. 3 On the Calculation tab (see Figure 28-2), select Accept Labels In Formulas.
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Microsoft Office Excel 2003 Inside Out
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Figure 28-2. Excel s splendid label-based formulas will not work unless you select the Accept Labels In Formulas option.
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If you want to use label-based formulas in a calculated column, be sure to turn this option on before you begin creating the formulas. You can t convert explicit cell references to label references retroactively by simply turning on the option after the formulas are in place. If you change your mind about using labels, though, you can go back to the Options dialog box and clear the check box. Excel will then display the following message:
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Simply click OK and your label-based formulas will be converted to formulas that use ordinary cell references.
Making Label-Based Formulas Available in All Workbooks
The option that enables or disables label-based formulas is workbook-specific. That is, because Excel turns this feature off by default, you have to enable it explicitly in each workbook where you want to use it. You can change the default, however, as follows:
1 Start Excel, and enable the option in a blank workbook. (Choose Tools, Options, click
the Calculation tab, and select Accept Labels In Formulas.)
2 Choose File, Save. On the Save As Type line in the Save As dialog box, choose Template. 3 Save the file under the name BOOK in your XLSTART folder. This folder is a subfolder
of the folder that contains Excel.exe, the Excel executable file. On a typical system, that 704
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Managing Information in Lists location is C:\Program Files\Microsoft Office\Office 11, but on yours it might be different. If the folder in which Excel.exe is stored on your system does not include a subfolder named XLSTART, create it. Then, save the BOOK template in that new folder. If the XLSTART folder includes a template named BOOK.XLT, that template becomes the model for all new workbooks.
Inside Out
Don t use row labels in formulas if you plan to sort Because Excel can use row headers as well as column headers in formulas, it might be tempting to qualify the Age formulas in column G of Figure 28-1 with the row headers in column A. For example, at G2, we could have written
=INT((TODAY()-Berry Date of Birth)/365.25)
This change would make the formula even more readable, and Excel would happily replicate the new version of the formula down the column, so that G3 would say
=INT((TODAY()-Kleinerman Date of Birth)/365.25)
Using (or Disabling) Other List-Building Aids
Excel offers the following additional features to simplify the task of list creation:
Automatic format and formula extension. AutoComplete for cell values. The Pick From List command. Move on Enter. Custom Lists.
Most users find these features to be a great convenience, but if you happen to be one who does not, you can disable or ignore them, as described later in this section.
Automatic Format and Formula Extension
Excel looks for patterns as you build or extend a list. If you enter a text value in a column, for example, and the text in the same column in the three preceding rows happens to be italic, 705
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and so on. Resist any temptation to do this! With the age formulas overqualified in this manner, the moment you sorted your list (putting the last names in alphabetical order, for example), your carefully constructed age formulas would turn to hash, because Excel would not make the appropriate formula changes after rearranging the rows. Leave readable enough alone. If all the calculated-column formulas are identical, as they are in Figure 28-1, they ll remain identical after a sort, and everything will continue to work.
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