This article describes how to use Jet OLE DB Provider 4.0 to connect to various external databases through installable ISAM drivers. Connection strings are provided for opening each ISAM database.
NOTE: The code in this article assumes that you have created an ADO
Connection object:
cnn, and an ADO
RecordSet object:
rst.
Open Excel
The following code opens an Excel ISAM database:
cnn.Open "Provider=Microsoft.Jet.OLEDB.4.0;" & _
"Data Source=c:\somepath\ExcelFile.xls;" & _
"Extended Properties=""Excel 8.0;HDR=Yes;"";"
:
C is the drive, and
somepath is the folder that contains the example Excel file (ExcelFile.xls).
"HDR=Yes" indicates that the provider will not include the first row of the
cell range (which may be a header row) in the RecordSet.
For additional information about connecting to a Microsoft Excel spreadsheet, click the article number below
to view the article in the Microsoft Knowledge Base:
295646Â
(http://kbalertz.com/Feedback.aspx?kbNumber=295646/EN-US/
)
HOWTO: Transfer Data from ADO Data Source to Excel with ADO
Open dBASE
The following code opens a dBASE ISAM database.
If a dBASE file (for example, dBaseFile.dbf) is located at
c:\somepath, where
C is the drive, and where
somepath is the folder that contains dBaseFile.dbf, as follows:
cnn.Open "Provider=Microsoft.Jet.OLEDB.4.0;" & _
"Data Source=c:\somepath;" & _
"Extended Properties=DBASE III;"
specify the file name in the SQL statement as follows:
rst.Open "Select * From dBaseFile", cnn, , ,adCmdText
Open Lotus 1-2-3
The following code opens a Lotus 1-2-3 ISAM database:
cnn.Open "Provider=Microsoft.Jet.OLEDB.4.0;" & _
"Data Source=c:\somepath\Lotus123File.wk3;" & _
"Extended Properties=Lotus WK3;"
:
C is the drive, and
somepath is the folder that contains the example Lotus 1-2-3 file (Lotus123File.wk3).
Open Paradox
The following code opens a Paradox ISAM database.
If a Paradox 5.0 file (for example, PdxFile.db) is located at
c:\somepath, where
C is the drive, and where
somepath is the folder that contains PdxFile.db, as follows:
cnn.Open "Provider=Microsoft.Jet.OLEDB.4.0;" & _
"Data Source=c:\somepath;" & _
"Extended Properties=Paradox 5.x;"
specify the file name in the SQL statement as follows:
rst.Open "Select * From PdxFile", cnn, , ,adCmdText
: Not all versions of Paradox are supported by the Jet ISAM. For additional information, click the article number below
to view the article in the Microsoft Knowledge Base:
230126Â
(http://kbalertz.com/Feedback.aspx?kbNumber=230126/EN-US/
)
ACC2000: Using Paradox Data with Access 2000 and Jet
Open Text
If a text file (for example, TestFile.txt) is located at
c:\somepath, where
C is the drive, and where
somepath is the folder that contains TestFile.txt, as follows:
cnn.Open "Provider=Microsoft.Jet.OLEDB.4.0;" & _
"Data Source=c:\somepath;" & _
"Extended Properties=""text;HDR=Yes;FMT=Delimited;"";"
specify the file name in the SQL statement as follows:
rst.Open "Select * From TextFile.txt", cnn, , , adCmdText
The Text ISAM permits you to handle multiple text file formats. You cannot define all characteristics of a text file through the connection string. For example, if you want to open a fixed-width file, or you want to use a delimiter other than the comma, you must specify all these settings in a Schema.INI file. For more information about about Schema.INI files, visit the Microsoft Developer Network (MSDN) Library at the following Web site: