How to Open dBASE Table with Nonstandard File Extension

- Microsoft Visual Basic for Windows, version 3.0

SUMMARY

To open a dBASE table file that has a non-standard file extension, specify the table name as <filename>#<extension>.

MORE INFORMATION

The standard file extension used by dBASE for tables is .DBF. In Visual Basic version 3.0 using the dBASE installable ISAMs, you can open a table by specifying the file name without this extension because the dBASE installable ISAM assumes the extension to be .DBF by default. If you specify the extension <filename>.<extension>, the dBASE installable ISAM will not recognize it and will give you the following error message:

   <filename>.<extension> isn't a valid name.

Example

The following code example demonstrates how to open a dBASE table file that has a non-standard file extension (AUTHORS.OLD) and print the first field of all records in the table to the form. The following example assumes that you have a dBASE III table with a file name of AUTHORS.OLD located in the C:\DBASEIII\OLDBOOKS directory. You may need to modify the example and create a dBASE III database with a table called AUTHORS.OLD in order for it to work correctly.

1. Start Visual Basic or from the File menu, choose New Project (ALT, F, N) if Visual Basic is already running. Form1 is created by default.

2. Add a Command Button (Command1) to Form1.

3. Add the following code to the Click event of Command1:

      Sub Command1_Click()
         Dim db As Database
         Dim OldAuthors As Table
   
         Connect$ = "dBASE III"          ' Specify database type
         dbName$ = "C:\DBASEIII\OLDBOOKS"      ' Specify database directory
   
         Set db = OpenDatabase(dbName$, False, False, Connect$)
         Set OldAuthors = db.OpenTable("Authors#Old") ' Open table
         While Not OldAuthors.EOF
            Print OldAuthors(0)           ' Print field(0) to the form
            OldAuthors.MoveNext           ' for all records.
         Wend
   
         OldAuthors.Close
         db.Close
      End Sub
   
   

4. Run the example.

5. Click the Command1 button.