jsonToString (Function)

jsonToString creates a string representation of the JSON structure.

If indent is set to 0, it will be a compact string with no indentation or newlines, otherwise it will use newlines between items and use indentation.

Input:

o : SYSHANDLE

A handle to the JSON structure.

indent: SINT (0..31, Default 3)

The number of spaces to use for indentation. If set to 0, the string will not use indentation and will be on a single line.

Output:

str : STRING

The generated string.

Returns: INT

Declaration:

FUNCTION jsonToString : INT;
VAR_INPUT
  o      : SYSHANDLE;
  indent : INT := 3;
  str    : ACCESS STRING;
END_VAR;

Example:

INCLUDE rtcu.inc
 
PROGRAM test;
VAR
  rc  : INT;
  obj : SYSHANDLE;
  str : STRING;
END_VAR;
 
BEGIN
  ...
  // Create structure from string
  rc := jsonFromString(o := obj, str := "[{$"name$":$"Test Object$"}]");
 
  // Dump structure to device output
  rc := jsonToString(o := obj, indent:=3, str := str);
  DebugMsg(message:=str);
  ...
END;
 
END_PROGRAM;