(DataFlex) Create more Complex JSON Document

Sample code to create the following JSON document:

    {  
        "Title": "The Cuckoo's Calling",  
        "Author": "Robert Galbraith",  
        "Genre": "classic crime novel",  
        "Detail": {  
            "Publisher": "Little Brown",  
            "Publication_Year": 2013,  
            "ISBN-13": 9781408704004,  
            "Language": "English",  
            "Pages": 494  
        },  
        "Price": [  
            {  
                "type": "Hardcover",  
                "price": 16.65  
            },  
            {  
                "type": "Kindle Edition",  
                "price": 7.00  
            }  
        ]  
    }  

Note: This example requires Chilkat v11.1.0 or greater.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoJson
    Integer iIndex
    Variant vDetail
    Handle hoDetail
    Variant vAPrice
    Handle hoAPrice
    Variant vPriceObj
    Handle hoPriceObj
    String sTemp1

    Move False To iSuccess

    Get Create (RefClass(cComChilkatJsonObject)) To hoJson
    If (Not(IsComObjectCreated(hoJson))) Begin
        Send CreateComObject of hoJson
    End

    // The only reason for failure in the following lines of code would be an out-of-memory condition..

    // An index value of -1 is used to append at the end.
    Move -1 To iIndex

    Get ComAddStringAt Of hoJson -1 "Title" "The Cuckoo's Calling" To iSuccess
    Get ComAddStringAt Of hoJson -1 "Author" "Robert Galbraith" To iSuccess
    Get ComAddStringAt Of hoJson -1 "Genre" "classic crime novel" To iSuccess

    // Let's create the Detail JSON object:
    Get Create (RefClass(cComChilkatJsonObject)) To hoDetail
    If (Not(IsComObjectCreated(hoDetail))) Begin
        Send CreateComObject of hoDetail
    End
    Get pvComObject of hoDetail to vDetail
    Get ComAppendObject2 Of hoJson "Detail" vDetail To iSuccess

    Get ComAddStringAt Of hoDetail -1 "Publisher" "Little Brown" To iSuccess
    Get ComAddIntAt Of hoDetail -1 "Publication_Year" 2013 To iSuccess
    Get ComAddNumberAt Of hoDetail -1 "ISBN-13" "9781408704004" To iSuccess
    Get ComAddStringAt Of hoDetail -1 "Language" "English" To iSuccess
    Get ComAddIntAt Of hoDetail -1 "Pages" 494 To iSuccess

    // Add the array for Price
    Get Create (RefClass(cComChilkatJsonArray)) To hoAPrice
    If (Not(IsComObjectCreated(hoAPrice))) Begin
        Send CreateComObject of hoAPrice
    End
    Get pvComObject of hoAPrice to vAPrice
    Get ComAppendArray2 Of hoJson "Price" vAPrice To iSuccess

    // Entry in aPrice will be a JSON object.

    // Append a new/empty ojbect to the end of the aPrice array.
    Get Create (RefClass(cComChilkatJsonObject)) To hoPriceObj
    If (Not(IsComObjectCreated(hoPriceObj))) Begin
        Send CreateComObject of hoPriceObj
    End

    Get pvComObject of hoPriceObj to vPriceObj
    Get ComAddObjectAt2 Of hoAPrice -1 vPriceObj To iSuccess
    Get ComAddStringAt Of hoPriceObj -1 "type" "Hardcover" To iSuccess
    Get ComAddNumberAt Of hoPriceObj -1 "price" "16.65" To iSuccess

    Get pvComObject of hoPriceObj to vPriceObj
    Get ComAddObjectAt2 Of hoAPrice -1 vPriceObj To iSuccess
    Get ComAddStringAt Of hoPriceObj -1 "type" "Kindle Edition" To iSuccess
    Get ComAddNumberAt Of hoPriceObj -1 "price" "7.00" To iSuccess

    Set ComEmitCompact Of hoJson To False
    Get ComEmit Of hoJson To sTemp1
    Showln sTemp1


End_Procedure