SetValue Method

Sets a new value for the element specified by XPath.

Syntax

ANSI (Cross Platform)
int SetValue(const char* lpszValue, int iValueType);

Unicode (Windows)
INT SetValue(LPCWSTR lpszValue, INT iValueType);
- (void)setValue:(NSString*)value :(int)valueType;
#define MID_JSON_SETVALUE 24

IPWORKSIOT_EXTERNAL int IPWORKSIOT_CALL IPWorksIoT_JSON_Do(void *lpObj, int methid, int cparam, void *param[], int cbparam[], int64 *lpllVal);

Remarks

This method sets a new value for the element specified in XPath. This is used to modify an existing JSON document.

Value specifies the new value.

ValueType specifies the type of the value. Possible values are:

  • 0 (Object)
  • 1 (Array)
  • 2 (String)
  • 3 (Number)
  • 4 (Bool)
  • 5 (Null)
  • 6 (Raw)

See Save for details.

Error Handling (C++)

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)
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IPWorks IoT 2020 C++ Edition - Version 20.0 [Build 8265]