Fully Typed Alpha Vantage Api (https://www.alphavantage.co/) .NET Core C# Wrapper
Nuget https://www.nuget.org/packages/Exus.AlphaVantage.Core/
private const string ALPHA_VANTAGE_API_KEY = "Api key here";public async Task GetIntradayTimeSeries()
{
var querier = new ApiQuerier(ALPHA_VANTAGE_API_KEY);
// Intraday time series for MSFT:
var query = new Exus.AlphaVantage.Queries.TimeSeriesIntradayQuery
{
Symbol = symbol
};
var result = await _apiQuerier.Query(query);
// result.TimeSeries is a dictionary with the date time as the key
foreach (var point in result.TimeSeries)
{
Console.WriteLine($"{point.Key}: {point.Value.Open}");
}
}Startup.cs
private const string ALPHA_VANTAGE_API_KEY = "Api key here";// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
services.AddAlphaVantage();
services.Configure<ApiQuerierSettings>(o =>
{
o.ApiKey = ALPHA_VANTAGE_API_KEY;
});
}StockQuerierService.cs
using Exus.AlphaVantage;
using Exus.AlphaVantage.QueryResults;
public class StockQuerierService
{
public readonly IApiQuerier _apiQuerier; //Injected
public StockQuerierService(IApiQuerier apiQuerier)
{
_apiQuerier = apiQuerier;
}
public async Task<TimeSeriesIntradayQueryResult> GetIntradayTimeSeries(string symbol)
{
var query = new Exus.AlphaVantage.Queries.TimeSeriesIntradayQuery
{
Symbol = symbol
};
var result = await _apiQuerier.Query(query);
return result;
}
}This library provides several useful interfaces that integrate with dependency injection services that enable you to provide your own implementations.
Processes a query object and returns a query result
Web client used by the default ApiQuerier that retrieves a response and deserializes into an object
Deserializer used by the default Web client to deserialize a response string (json) Note: The datatype exists incase anything other than a string needs to be deserialized, such as a memory stream or file
Json.NET Contract resolver used by the default deserializer
Json.NET converter used by the default deserializer
AlphaVantageServices.cs
public static void AddAlphaVantage(this IServiceCollection services)
{
services.AddTransient<IApiQuerier, ApiQuerier>();
services.AddTransient<IApiWebClient, ApiWebClient>();
services.AddTransient<IApiQueryResultDeserializer<string>, ApiQueryResultDeserializer>();
services.AddTransient<IApiQueryResultContractResolver, ApiQueryResultContractResolver>();
services.AddTransient<ApiQueryResultJsonConverter, ApiQueryResultJsonConverter>();
}MyCustomApiWebClient.cs
public class MyCustomApiWebClient : IApiWebClient
{
public const string QUERY_URL = "https://www.alphavantage.co/query";
private readonly IApiQueryResultDeserializer<string> _deserializer;
public MyCustomApiWebClient()
{
_deserializer = new ApiQueryResultDeserializer();
}
public ApiWebClient(IApiQueryResultDeserializer<string> deserializer)
{
_deserializer = deserializer;
}
public async Task<TApiQueryResult> Query<TApiQueryResult>(IApiQuery<TApiQueryResult> query)
{
using (var webClient = new System.Net.WebClient())
{
webClient.QueryString = query.Parameters.Aggregate(new NameValueCollection(),
(seed, current) => {
seed.Add(current.Key, current.Value);
return seed;
});
var json = await webClient.DownloadStringTaskAsync(QUERY_URL);
return _deserializer.Deserialize<TApiQueryResult>(json);
}
}
}Startup.cs
// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
services.AddAlphaVantage();
services.AddTransient<IApiWebClient, MyCustomApiWebClient>();
}