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(Delphi DLL) 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 for Delphi Downloads

Chilkat non-ActiveX DLL for Delphi

Chilkat ActiveX DLL for Delphi

* The examples here use the non-ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Http, JsonObject, Csv;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
http: HCkHttp;
jsonStr: PWideChar;
json: HCkJsonObject;
csv: HCkCsv;
numColumns: Integer;
i: Integer;
row: Integer;
numRows: Integer;
col: Integer;

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

http := CkHttp_Create();

// Get the JSON we'll be parsing..
jsonStr := CkHttp__quickGetStr(http,'https://www.chilkatsoft.com/exampleData/qb_customer_balance_detail_report_2.json');
if (CkHttp_getLastMethodSuccess(http) <> True) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

json := CkJsonObject_Create();
CkJsonObject_Load(json,jsonStr);

// Let's parse the JSON into a CSV, and then save to a CSV file.
csv := CkCsv_Create();
CkCsv_putHasColumnNames(csv,True);

// Set the column names of the CSV.
numColumns := CkJsonObject_SizeOfArray(json,'Columns.Column');
if (numColumns < 0) then
  begin
    Memo1.Lines.Add('Unable to get column names');
    Exit;
  end;
i := 0;
while i < numColumns do
  begin
    CkJsonObject_putI(json,i);
    CkCsv_SetColumnName(csv,i,CkJsonObject__stringOf(json,'Columns.Column[i].ColTitle'));
    i := i + 1;
  end;

// Let's get the rows.
// We'll ignore the Header and Summary, and just get the data.
row := 0;
numRows := CkJsonObject_SizeOfArray(json,'Rows.Row[0].Rows.Row');
if (numRows < 0) then
  begin
    Memo1.Lines.Add('Unable to get data rows');
    Exit;
  end;

while row < numRows do
  begin
    CkJsonObject_putI(json,row);
    numColumns := CkJsonObject_SizeOfArray(json,'Rows.Row[0].Rows.Row[i].ColData');
    col := 0;
    while col < numColumns do
      begin
        CkJsonObject_putJ(json,col);
        CkCsv_SetCell(csv,row,col,CkJsonObject__stringOf(json,'Rows.Row[0].Rows.Row[i].ColData[j].value'));
        col := col + 1;
      end;

    row := row + 1;
  end;

// Show the CSV 
Memo1.Lines.Add(CkCsv__saveToString(csv));

// Save to a CSV file
success := CkCsv_SaveFile(csv,'qa_output/customerDetailReport.csv');

CkHttp_Dispose(http);
CkJsonObject_Dispose(json);
CkCsv_Dispose(csv);

end;

 

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