Load Business b-ridge data into a FoxPro database. This article includes full code and a walk-through of the process.
The CData ODBC Driver for Business b-ridge enables you to access Business b-ridge data using the ODBC standard. You can use the CData ODBC Driver for Business b-ridge to integrate Business b-ridge data into your FoxPro project. The procedure below provides a walk-through of the included code sample, which saves Business b-ridge data into tables in a FoxPro database.
Connect and Transfer
To get started, add the code sample to a new project. You can execute the following command to save all tables without displaying them:
DO C:\Temp\sqldump.prg WITH "CData Business b-ridge Source x64", "TESTDB", .f.
Below is the process that the program follows:
- If you have not already, specify connection properties in a DSN (data source name). You can use the Microsoft ODBC Data Source Administrator to create and configure ODBC DSNs.
Below is a typical connection string:
See the "Getting Started" chapter in the help documentation for a guide to setting the required properties in the Microsoft ODBC Data Source Administrator.
- Create a new FoxPro database.
Open a connection to Business b-ridge data with the line below:
m.hSQLconnection = SQLCONNECT(m.cODBCDSN)
If the connection was successful, you can now retrieve the list of tables using the SQLTABLES function. The code below saves the list of tables in sys_tables.dbf:
WAIT WINDOW "Fetching tables for data source '" + m.cODBCDSN + "'..." NOWAIT NOCLEAR m.nSQLTABLES = SQLTABLES(m.hSQLconnection) IF lUseDistinctConnections WAIT WINDOW "Closing ODBC Connection for data source '" + m.cODBCDSN + "'..." NOWAIT NOCLEAR SQLDISCONNECT(m.hSQLconnection) m.hSQLconnection = 0 * SQLCONNECT needs to be called again ENDIF IF m.nSQLTABLES > 0 * create local table containing list of tables in db COPY TO (m.cImportData + "sys_tables") USE * convert each table to DBF USE (m.cImportData + "sys_tables") ALTER TABLE DBF("sys_tables") ; ADD COLUMN records i ; ADD COLUMN dbfname m
-
Scan over each table, saving it to a DBF file. The function ODBCtoDBF stores the table in a DBF file and then opens a grid if the lBrowse parameter is set to true:
FUNCTION ODBCtoDBF (cTableName as String, cTableType as String, lBrowse as Logical, lhSQLConnection as Integer) WAIT WINDOW ; "Converting " + m.cTableType + ' "' + m.cTableName + '" to DBF...' ; NOWAIT NOCLEAR ACTIVATE SCREEN * strip characters incompatible with FoxPro out of the name of the DBF file m.cTableAlias = "" m.nTableNameLen = LEN(m.cTableName) m.nTableNameStart = 1 FOR m.nTableNameStart = 1 TO m.nTableNameLen m.cCharacter = SUBSTR(m.cTableName, m.nTableNameStart, 1) IF !ISALPHA(m.cCharacter) .and. (m.nTableNameStart = 1 .or. !ISDIGIT(m.cCharacter)) m.cTableAlias = m.cTableAlias + "_" ELSE m.cTableAlias = m.cTableAlias + m.cCharacter ENDIF ENDFOR m.cFromTable = m.cTableName m.cTempViewAlias = m.cTableType + "_" + m.cTableAlias LOCAL loException as Exception LOCAL lnResultSets TRY * run query m.lnResultSets = SQLEXEC(m.lhSQLConnection, ; "SELECT * FROM " + m.cFromTable, ; m.cTempViewAlias, ; aSQLResult) IF m.lnResultSets#1 SET STEP ON ENDIF ACTIVATE SCREEN CATCH TO m.loException ACTIVATE SCREEN ? "Error opening " + m.cTempViewAlias + ":" ? m.loException.Message ? m.loException.Details ENDTRY IF !USED(m.cTempViewAlias) RETURN ENDIF * copy records from view cursor to disk SELECT * FROM (m.cTempViewAlias) ; INTO TABLE (m.cImportData + m.cTableAlias) IF USED(m.cTableAlias) ACTIVATE SCREEN FLUSH && flush the buffer to write the data to disk IF m.lBrowse * pop the table up on screen SELECT (m.cTableAlias) BROWSE NORMAL NOMODIFY NOWAIT ACTIVATE SCREEN ELSE * close on-disk table for now USE IN (m.cTableAlias) ACTIVATE SCREEN ENDIF ENDIF IF USED(m.cTempViewAlias) USE IN &cTempViewAlias && close SQL view ACTIVATE SCREEN ENDIF WAIT CLEAR ENDFUNC
- You can now save tables of Business b-ridge data as DBF files.
Below is the full code:
PARAMETERS cODBCDSN, cDatabaseName, lBrowseAfterConvert
* cODBCDSN The ODBC data source name, used for the name of the folder where the DBF tables are stored.
* cDatabaseName The name of the FoxPro database to use. This database is created if it does not exist. The default is DATABASE_NAME.
*
* lBrowseAfterConvert If ".t." display each table with the BROWSE command after importing it. If ".f." close each table before moving on to the next one.
#define ODBC_DATASOURCE "DataSourceName"
#define DATABASE_NAME "odbcdata"
m.m_tpath = ".\" && root directory for data
ON ERROR
SET SAFETY OFF
IF VARTYPE(m.cODBCDSN)#"C" .or. EMPTY(m.cODBCDSN)
m.cODBCDSN = ODBC_DATASOURCE
ENDIF
IF VARTYPE(m.cDatabaseName)#"C" .or. EMPTY(m.cDatabaseName)
m.cDatabaseName = DATABASE_NAME
ENDIF
m.cImportData = m.cODBCDSN + "\"
CLOSE TABLES ALL
CLOSE DATABASES ALL
IF !DIRECTORY(m.cImportData)
MKDIR (m.cImportData)
ENDIF
CREATE DATABASE (m.cDatabaseName)
CREATE CONNECTION (m.cDatabaseName) DATASOURCE (m.cODBCDSN) DATABASE (m.cDatabaseName)
WAIT WINDOW "Opening ODBC Connection for data source '" + m.cODBCDSN + "'..." NOWAIT NOCLEAR
m.hSQLconnection = SQLCONNECT(m.cODBCDSN)
IF m.hSQLconnection > 0
* Connection successful; get list of tables
WAIT WINDOW "Fetching tables for data source '" + m.cODBCDSN + "'..." NOWAIT NOCLEAR
m.nSQLTABLES = SQLTABLES(m.hSQLconnection)
IF m.nSQLTABLES > 0
* Create local table containing list of tables in db
COPY TO (m.cImportData + "sys_tables")
USE
* Convert each table to DBF
USE (m.cImportData + "sys_tables")
ALTER TABLE DBF("sys_tables") ;
ADD COLUMN records i ;
ADD COLUMN dbfname m
SCAN
m.cCurrentTable = TRIM(sys_tables.table_name)
m.cCurrentTableType = TRIM(sys_tables.table_type) && Valid values are "SYSTEMTABLE", "TABLE", and "VIEW".
IF m.cCurrentTableType = "TABLE"
ODBCtoDBF(m.cCurrentTable, m.cCurrentTableType, m.lBrowseAfterConvert, m.hSQLConnection)
ELSE
ACTIVATE SCREEN
? "ERROR:", m.cCurrentTable, "Couldn't open ODBC connection."
=MESSAGEBOX("couldn't open data source " + m.cODBCDSN + " for table " + m.cCurrentTable + ".")
ENDIF
ENDSCAN
BROWSE NORMAL NOWAIT
ELSE
=MESSAGEBOX("No tables found in data source " + m.cODBCDSN + ".")
SET STEP ON
ENDIF
SQLDISCONNECT(m.hSQLconnection)
ELSE
=MESSAGEBOX("Could not open data source " + m.cODBCDSN + ".")
SET STEP ON
ENDIF
FUNCTION ODBCtoDBF (cTableName as String, cTableType as String, lBrowse as Logical, lhSQLConnection as Integer)
WAIT WINDOW ;
"Converting " + m.cTableType + ' "' + m.cTableName + '" to DBF...' ;
NOWAIT NOCLEAR
ACTIVATE SCREEN
* Strip characters incompatible with FoxPro out of the name of the DBF file
m.cTableAlias = ""
m.nTableNameLen = LEN(m.cTableName)
m.nTableNameStart = 1
FOR m.nTableNameStart = 1 TO m.nTableNameLen
m.cCharacter = SUBSTR(m.cTableName, m.nTableNameStart, 1)
IF !ISALPHA(m.cCharacter) .and. (m.nTableNameStart = 1 .or. !ISDIGIT(m.cCharacter))
m.cTableAlias = m.cTableAlias + "_"
ELSE
m.cTableAlias = m.cTableAlias + m.cCharacter
ENDIF
ENDFOR
m.cFromTable = m.cTableName
m.cTempViewAlias = m.cTableType + "_" + m.cTableAlias
LOCAL loException as Exception
LOCAL lnResultSets
TRY
* Run query
m.lnResultSets = SQLEXEC(m.lhSQLConnection, ;
"SELECT * FROM " + m.cFromTable, ;
m.cTempViewAlias, ;
aSQLResult)
IF m.lnResultSets#1
SET STEP ON
ENDIF
ACTIVATE SCREEN
CATCH TO m.loException
ACTIVATE SCREEN
? "Error opening " + m.cTempViewAlias + ":"
? m.loException.Message
? m.loException.Details
ENDTRY
IF !USED(m.cTempViewAlias)
RETURN
ENDIF
* Copy records from view cursor to disk
SELECT * FROM (m.cTempViewAlias) ;
INTO TABLE (m.cImportData + m.cTableAlias)
IF USED(m.cTableAlias)
ACTIVATE SCREEN
FLUSH && Flush the buffer to write the data to disk
IF m.lBrowse
* Display the table on screen
SELECT (m.cTableAlias)
BROWSE NORMAL NOMODIFY NOWAIT
ACTIVATE SCREEN
ELSE
* Close on-disk table
USE IN (m.cTableAlias)
ACTIVATE SCREEN
ENDIF
ENDIF
IF USED(m.cTempViewAlias)
USE IN &cTempViewAlias && Close SQL view
ACTIVATE SCREEN
ENDIF
WAIT CLEAR
ENDFUNC