JSON VBA Parse to Excel

Question

I got some JSON parsing working. I use VBA to parse a JSON code from my webserver, write that to cell A1 at my Excel Worksheet. But I don't get this to convert into the other cells.

Here is my JSON sample:

{
    "@type":["IN.areaList.1","OII.list.1"],
    "@self":"/bereiche",
    "list":[
          {"@type":["IN.bereich.1"],
           "@self":"/1.1.Bereich.2.7",
           "scha":false,
           "trlState":"",
           "oiischa":false,
           "readyTo1":false,
           "readyTo2":false,
           "numberOfBypassedDevices":0,
           "test":"",
           "TestActive":false,
           "chModeActive":false,
           "incs":[]}
            ]
}

This is my Sub, it is working for another sample:

Sub JsonToExcelExample()

    Dim jsonText As String
    Dim jsonObject As Object
    Dim item As Object
    Dim i As Long
    Dim ws As Worksheet

    Set ws = Worksheets("Remote")
    jsonText = ws.Cells(1, 1)
    Set jsonObject = JsonConverter.ParseJson(jsonText)
    i = 3
    ws.Cells(2, 1) = "Color"
    ws.Cells(2, 2) = "Hex Code"
    For Each item In jsonObject("0")
        ws.Cells(i, 1) = item("color")
        ws.Cells(i, 2) = item("value")
        i = i + 1
    Next

End Sub

How this VBA code should be changed so that the above JSON sample to be placed on the worksheet like a table?

Solution

Take a look at the below example. Import JSON.bas module into the VBA project for JSON processing.

Option Explicit

Sub Test()

    Dim sJSONString As String
    Dim vJSON
    Dim sState As String
    Dim aData()
    Dim aHeader()
    Dim vResult

    ' Retrieve question #50068973 HTML content
    With CreateObject("MSXML2.XMLHTTP")
        .Open "GET", "https://stackoverflow.com/questions/50068973", False
        .send
        sJSONString = .responseText
    End With
    ' Extract JSON sample from the question
    sJSONString = "{" & Split(sJSONString, "<code>{", 2)(1)
    sJSONString = Split(sJSONString, "</code>", 2)(0)
    ' Parse JSON sample
    JSON.Parse sJSONString, vJSON, sState
    If sState = "Error" Then
        MsgBox "Invalid JSON"
        End
    End If
    ' Convert raw JSON to array and output to worksheet #1
    JSON.ToArray vJSON, aData, aHeader
    With Sheets(1)
        .Cells.Delete
        .Cells.WrapText = False
        OutputArray .Cells(1, 1), aHeader
        Output2DArray .Cells(2, 1), aData
        .Columns.AutoFit
    End With
    ' Flatten JSON
    JSON.Flatten vJSON, vResult
    ' Convert flattened JSON to array and output to worksheet #2
    JSON.ToArray vResult, aData, aHeader
    With Sheets(2)
        .Cells.Delete
        .Cells.WrapText = False
        OutputArray .Cells(1, 1), aHeader
        Output2DArray .Cells(2, 1), aData
        .Columns.AutoFit
    End With
    MsgBox "Completed"

End Sub

Sub OutputArray(oDstRng As Range, aCells As Variant)

    With oDstRng
        .Parent.Select
        With .Resize(1, UBound(aCells) - LBound(aCells) + 1)
            .NumberFormat = "@"
            .Value = aCells
        End With
    End With

End Sub

Sub Output2DArray(oDstRng As Range, aCells As Variant)

    With oDstRng
        .Parent.Select
        With .Resize( _
                UBound(aCells, 1) - LBound(aCells, 1) + 1, _
                UBound(aCells, 2) - LBound(aCells, 2) + 1)
            .NumberFormat = "@"
            .Value = aCells
        End With
    End With

End Sub

The output on the worksheet #1 for the raw sample you provided is as follows:

And there is the flattened sample output on the worksheet #2:

BTW, the similar approach applied in other answers.

Comments

[Marius]

I found this to be very slow on large data sets. It looks like: "Output2DArray .Cells(2, 1), aData" is taking all the time. Any suggestions? I tried Application.ScreenUpdating = False and Application.Calculation = xlCalculationManual

[omegastripes]

@Marius AFAIK Output2DArray uses the fastest method available in VBA.

[Marius]

Edit to above comment: Apologies, it was actually JSON.Parse that takes all the time. Any way to speed it up?

[omegastripes]

@Marius IMO better you to post a new question where you can describe the performance issue you encountered.