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(VB.NET UWP/WinRT) Simple REST ExampleDemonstrates a very simple RESTful API call to get a stock time series daily (quotes) from Alpha Vantage.
' This example requires the Chilkat API to have been previously unlocked. ' See Global Unlock Sample for sample code. Dim rest As New Chilkat.Rest ' Connect to the REST server. Dim bTls As Boolean = True Dim port As Integer = 443 Dim bAutoReconnect As Boolean = True Dim success As Boolean = Await rest.ConnectAsync("www.alphavantage.co",port,bTls,bAutoReconnect) If (success <> True) Then Debug.WriteLine(rest.LastErrorText) Exit Sub End If ' Get a stock quote: ' Sending GET request to https://www.alphavantage.co/query?function=TIME_SERIES_DAILY&symbol=MSFT&apikey=my_api_key success = rest.AddQueryParam("function","TIME_SERIES_DAILY") success = rest.AddQueryParam("symbol","AAPL") success = rest.AddQueryParam("apikey","my_api_key") Dim responseJson As String = Await rest.FullRequestNoBodyAsync("GET","/query") If (rest.LastMethodSuccess <> True) Then Debug.WriteLine(rest.LastErrorText) Exit Sub End If Debug.WriteLine(responseJson) ' Sample response: ' { ' "Meta Data": { ' "1. Information": "Daily Prices (open, high, low, close) and Volumes", ' "2. Symbol": "AAPL", ' "3. Last Refreshed": "2019-12-06", ' "4. Output Size": "Compact", ' "5. Time Zone": "US/Eastern" ' }, ' "Time Series (Daily)": { ' "2019-12-06": { ' "1. open": "267.4800", ' "2. high": "271.0000", ' "3. low": "267.3000", ' "4. close": "270.7100", ' "5. volume": "25447644" ' }, ' "2019-12-05": { ' "1. open": "263.7900", ' "2. high": "265.8900", ' "3. low": "262.7300", ' "4. close": "265.5800", ' "5. volume": "18661343" ' }, ' "2019-12-04": { ' "1. open": "261.0700", ' "2. high": "263.3100", ' "3. low": "260.6800", ' "4. close": "261.7400", ' "5. volume": "16810388" ' }, ' ... ' "2019-07-18": { ' "1. open": "204.0000", ' "2. high": "205.8800", ' "3. low": "203.7000", ' "4. close": "205.6600", ' "5. volume": "18582161" ' } ' } ' } |
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