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# lr_json_stringify

Converts a JSON object to a JSON string.

int lr_json_stringify( "JsonObject=<parameter name>", "Format=<auto|compact|indented>" "OutputParam=<parameter name>" );

## Arguments

Name | Comments
--- | ---
JsonObject | The name of the parameter that stores the handle of the JSON object created by lr_eval_json.
Format | Optional. The spacing and line return layout of the returned string. One of: compact - No white space. Suitable for processing in code. indented (Default) - Easier for user to read. auto - Output is compact on the Controller and indented in the VuGen log.
OutputParam | The name of a parameter to store the output string.

lr_json_stringify writes the string equivalent of a JSON object to a parameter. The object is not changed.

This function is not recorded. You can insert it manually into your script.

## Return Values

This function returns 0 on success and -1 on failure.

## Parameterization

Parameterization is not applicable to this function.

## Example

This example shows the use of lr_json_stringify with different formats.

Copy code

        char *json_input =
            "{"
                "\"cart\":"
                    "{"
                        "\"customerId\":1343,"
                        "\"lineItems\":"
                        "[ {\"productId\":12343,\"quantity\":4}, "
                        "  {\"productId\":39293,\"quantity\":2} ]"
                    "}"
                "}";
        lr_save_string (json_input, "JSON_Input");
        lr_eval_json ("Buffer={JSON_Input}", "JsonObject=JSON_Param");

        //compact
        lr_json_stringify("JsonObject=JSON_Param","Format=compact","OutputParam=Result",LAST );
        lr_output_message("Compact JSON is : %s", lr_eval_string("{Result}"));

        //indented
        lr_json_stringify("JsonObject=JSON_Param","Format=indented","OutputParam=Result",LAST );
        lr_output_message("Indented JSON is : %s", lr_eval_string("{Result}"));

        //auto
        lr_json_stringify("JsonObject=JSON_Param","Format=auto","OutputParam=Result",LAST );
        // Result is indented in VuGen and Compact on the Controller.

    Output:

    Action.c(21): Compact JSON is : {"cart":{"customerId":1343,"lineItems":[{"productId":12343,"quantity":4},{"productId":39293,"quantity":2}]}}

    Action.c(25): Indented JSON is : {
        "cart": {
            "customerId": 1343,
            "lineItems": [
                {
                    "productId": 12343,
                    "quantity": 4
                },
                {
                    "productId": 39293,
                    "quantity": 2
                }
            ]
        }
    }

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