Argox PA-20 Programming Guide Bedienungsanleitung PDF herunterladen (Seite 65)

PT-20 Programming Guide

Other value: the quantity of the data.

WriteField

Purpose：

Use this function can revise the designated record in the existed file.

Syntax：

int WriteField(_DBMS* F_Search, int recordno, int fieldno, char* field);

Example call：

char str_field[10]=”123456789”;

WriteField(&fsearch,0,1, str_field);// Revise the second field of the first

data to “str_field”.

As revising success, file index will be moved to the front of the record

included revising field.

Includes：

#include “DBMS.h”

Description：

Using WriteField function can copy the field of appointed record. If the file

in disc D that you want to write, it will not allow to write.

Returns：

-1: Write into defeat.

Other value: Write into the amount of data.

WriteRecord

Purpose：

Using this function can copy the existed record.

Syntax：

int WriteRecord(_DBMS* F_Search, int recordno, char* record);

Example call：

char str_record[20]=”A123456,PA-20,2330”;

WriteRecord(&fsearch,0, str_record);// Revise the first record to char

str_record。

Includes：

#include “DBMS.h”

Description：

Use WriteRecord function can copy the existed record, but unable to

increase a new record.

As revising success, file index will be moved to revise the front of revising

record. If the file in disc D that you want to write, it will not allow to write.

Returns：

-1: Write into defeat.

Other value: Write into the amount of data.

ReadField

Purpose：

Use this function to read the data of appointed field in the appointed

record.

Syntax：

int ReadField(_DBMS* F_Search, int recordno, int fieldno, char* buffer);

Example call：

char str_buffer[30];

ReadField(&fsearch,5,0,str_buffer);//Reading the data of first field in the

sixth record, and store to “str_buffer”.

Includes：

#include “DBMS.h”

Description：

int recordno : Read of record position.

int fieldno : Read of field position.

char* buffer : Read the storing space of field。

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