VB.NET

Finnhub API - Get Stock Quote

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Demonstrates how to get a stock quote from the Finnhub API. VB.NET

Dim success As Boolean = False

' Replace with your actual Finnhub API key.
Dim apiKey As String = "YOUR_FINNHUB_API_KEY"
Dim symbol As String = "AAPL"

Dim http As New Chilkat.Http

' This is the URL without params.
Dim urlWithoutParams As String = "https://finnhub.io/api/v1/quote"

Dim req As New Chilkat.HttpRequest

' Add params that will be sent in the URL.
req.AddParam("symbol",symbol)
req.AddParam("token",apiKey)

req.HttpVerb = "GET"

' Send the request to get the JSON response.
Dim resp As New Chilkat.HttpResponse
success = http.HttpReq(urlWithoutParams,req,resp)
If (success = False) Then
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If


Dim json As New Chilkat.JsonObject
resp.GetBodyJson(json)

Dim statusCode As Integer = resp.StatusCode
Debug.WriteLine("response status code: " & statusCode)

json.EmitCompact = False
Debug.WriteLine(json.Emit())

' Sample result:

' {
'   "c": 248.8,
'   "d": -4.09,
'   "dp": -1.6173,
'   "h": 255.493,
'   "l": 248.07,
'   "o": 253.9,
'   "pc": 252.89,
'   "t": 1774641600
' }

If (statusCode = 200) Then
    ' Add the symbol to the top of the result.
    json.AddStringAt(0,"symbol",symbol)

    ' Rename members for clarification.
    json.Rename("c","currentPrice")
    json.Rename("d","change")
    json.Rename("dp","percentChange")
    json.Rename("h","high")
    json.Rename("l","low")
    json.Rename("o","open")
    json.Rename("pc","prevClose")
    json.Rename("t","unixTime")

    Debug.WriteLine(json.Emit())

Else
    Debug.WriteLine("Failed")
End If