Download Database application developer's guide : Borland Delphi for PDF

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Extra info for Database application developer's guide : Borland Delphi for Windows 95 and Windows NT : version 2.0

Example text

6 In the Fields Editor’s list of fields, choose Phone, then use the Object Inspector to view the events of the TStringField named CustPhone. 7 Double-click the OnGetText event to open the code window, then add code to handle the event as follows. Value; Delete(Text, 4, 1); Insert('(', Text, 1); Insert(')', Text, 5); end; end; In this sample code, DisplayText is True, meaning you’re not actually editing the field in question, but modifying the display of the field. When DisplayText is True, characters that would be invalid for the user to enter, such as parentheses in this case, can be inserted into the field for display purposes only.

In the form, the grid changes: instead of displaying all fields, it displays the only the fields you selected. 5 Click the CustNo field in the Fields Editor’s field list and view the properties and values displayed in the Object Inspector. ) Notice that the component’s Name property is Table1CustNo. Delphi generates this name automatically by appending the field name to the name of the associated TTable component. Use this name to refer to the TField component in code. 32 Database Application Developer’s Guide 6 Change the Align property from taRightJustify (the default) to taCenter.

The next line assigns a value to CustCustNo. KeyExclusive to True indicates that the value is to be excluded from the range. A customer number 4, 000 would not be included. ApplyRange puts the range settings into effect. ) For more information For more information about • Setting ranges and filtering data, see page 72. • Using the Fields Editor, see page 30. Chapter 2, Building a sample database application: MASTAPP 51 Printing reports and forms This section describes how to use Delphi to print reports created using ReportSmith, and how to print a Delphi form.

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