DynaPDF Manual - Page 391

Previous Page 390   Index   Next Page 392

Function Reference
Page 391 of 818
SI32 valLen;
char* src, *value = NULL;
// aField must be a handle of list box in this example
valLen = pdfGetFieldExpValue(pdf, aField, value);
SI32 len = strlen(value); // Get the string length
if (valLen > 0 && len < valLen)
{
src = value;
do
{
fwrite(src, 1, len, f);
fwrite("\r\n", 1, 2, f);
src += (len +1);
// Skip over the null-terminator
// This can not cause a buffer overrun because of the two
// null-terminators at the end of the string.
len = strlen(src);
}while(len);
}
If the string length that was returned by the standard C function strlen() is shorter than the length
that was returned by GetFieldExpValue(), multiple values are selected in the list box.
The code above writes the values to a file and adds an EOL after each value. This is just an example
to see how the string can be parsed.
Notice:
The export values of check boxes and combo boxes are not terminated with two null-terminators.
Try to parse the export value only if the field is a list box. The field type can be determined with the
functions GetFieldType(), GetFieldEx() or GetPageFieldEx().
Return values:
If the function succeeds the return value is the string length excluding the last null-terminator(s). If
the function fails the return value is a negative error code.
GetFieldExpValueEx
Syntax:
SI32 pdfGetFieldExpValueEx(
const PPDF* IPDF,
// Instance pointer
UI32 AField,
// Field handle
UI32 ValIndex,
// Value index
char* ADDR Value,
// Index value
char* ADDR ExpValue, // Index export value
LBOOL ADDR Selected) // Is the value selected?
 

Previous topic: GetFieldExpValCount, GetFieldExpValue

Next topic: GetFieldFlags


Start Chat