(Visual FoxPro) QuickBooks - Parse the JSON of a Customer Balance Detail Report

This example is to show how to parse the JSON of a particular Quickbooks report. The techniques shown here may help in parsing similar reports.

The JSON to be parsed is available at Sample Quickbooks Customer Balance Detail Report JSON

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

LOCAL lnSuccess
LOCAL loHttp
LOCAL lcJsonStr
LOCAL loJson
LOCAL loCsv
LOCAL lnNumColumns
LOCAL i
LOCAL lnRow
LOCAL lnNumRows
LOCAL lnCol

* This example assumes the Chilkat API to have been previously unlocked.
* See Global Unlock Sample for sample code.

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Http')
loHttp = CreateObject('Chilkat.Http')

* Get the JSON we'll be parsing..
lcJsonStr = loHttp.QuickGetStr("https://www.chilkatsoft.com/exampleData/qb_customer_balance_detail_report_2.json")
IF (loHttp.LastMethodSuccess <> 1) THEN
    ? loHttp.LastErrorText
    RELEASE loHttp
    CANCEL
ENDIF

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.JsonObject')
loJson = CreateObject('Chilkat.JsonObject')
loJson.Load(lcJsonStr)

* As an alternative to manually writing code, use this online tool to generate parsing code from sample JSON: 
* Generate Parsing Code from JSON

* Let's parse the JSON into a CSV, and then save to a CSV file.
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Csv')
loCsv = CreateObject('Chilkat.Csv')
loCsv.HasColumnNames = 1

* Set the column names of the CSV.
lnNumColumns = loJson.SizeOfArray("Columns.Column")
IF (lnNumColumns < 0) THEN
    ? "Unable to get column names"
    RELEASE loHttp
    RELEASE loJson
    RELEASE loCsv
    CANCEL
ENDIF

i = 0
DO WHILE i < lnNumColumns
    loJson.I = i
    loCsv.SetColumnName(i,loJson.StringOf("Columns.Column[i].ColTitle"))
    i = i + 1
ENDDO

* Let's get the rows.
* We'll ignore the Header and Summary, and just get the data.
lnRow = 0
lnNumRows = loJson.SizeOfArray("Rows.Row[0].Rows.Row")
IF (lnNumRows < 0) THEN
    ? "Unable to get data rows"
    RELEASE loHttp
    RELEASE loJson
    RELEASE loCsv
    CANCEL
ENDIF

DO WHILE lnRow < lnNumRows
    loJson.I = lnRow
    lnNumColumns = loJson.SizeOfArray("Rows.Row[0].Rows.Row[i].ColData")
    lnCol = 0
    DO WHILE lnCol < lnNumColumns
        loJson.J = lnCol
        loCsv.SetCell(lnRow,lnCol,loJson.StringOf("Rows.Row[0].Rows.Row[i].ColData[j].value"))
        lnCol = lnCol + 1
    ENDDO
    lnRow = lnRow + 1
ENDDO

* Show the CSV 
? loCsv.SaveToString()

* Save to a CSV file
lnSuccess = loCsv.SaveFile("qa_output/customerDetailReport.csv")

RELEASE loHttp
RELEASE loJson
RELEASE loCsv