How to: Bulk Copy Data from Program Variables (ODBC)
新增： 2006 年 4 月 14 日
There is a sample showing how to use bulk copy functions to bulk copy data from program variables to SQL Server using bcp_bind and bcp_sendrow. (Error-checking code is removed to simplify this example.)
The complete sample code is in this file: BulkCopyFromVariables.cpp, which you can download from the SQL Server Code Samples page. This sample was developed using Microsoft Visual C++ 2005 and was developed for ODBC version 3.0 or later.
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To use bulk copy functions directly on program variables
Allocate an environment handle and a connection handle.
Set SQL_COPT_SS_BCP and SQL_BCP_ON to enable bulk copy operations.
Connect to SQL Server.
Call bcp_init to set the following information:
- The name of the table or view to bulk copy from or to.
- Specify NULL for the name of the data file.
- The name of an data file to receive any bulk copy error messages (specify NULL if you do not want a message file).
- The direction of the copy: DB_IN from the application to the view or table or DB_OUT to the application from the table or view.
Call bcp_bind for each column in the bulk copy to bind the column to a program variable.
Fill the program variables with data, and call bcp_sendrow to send a row of data.
After several rows have been sent, call bcp_batch to checkpoint the rows already sent. It is good practice to call bcp_batch at least once per 1000 rows.
After all rows have been sent, call bcp_done to complete the operation.
You can vary the location and length of program variables during a bulk copy operation by calling bcp_colptr and bcp_collen. Use bcp_control to set various bulk copy options. Use bcp_moretext to send text, ntext, and image data in segments to the server.
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概念
Bulk Copying from Program Variables
其他資源
How to: Bulk Copy with the SQL Server ODBC Driver (ODBC)