Seasonality Core 2.7 macOS 9 mb. Seasonality Core is the complete weather center for your Mac. View weather at any of the 34,000 built-in locations in more than 200 countries, or add your own custom weather location to view even more precise data. Seasonality gives you an accurate 7 day forecast, graphs of past weather conditions, a custom. In the standalone Blazor app the weather forecast data was a static JSON file, but in the hosted project the SampleDataController provides the weather data Using ASP.NET Core. The shared class library project is referenced by both the Blazor client project and the ASP.NET Core server project, so that code can be shared between the two projects. Seasonality, but the approach we will follow is the following: 1. Estimate the amount of seasonality - the seasonal relatives (or factors or indices) 2. Estimate the trend (the rate demand is growing at) 3. Make a straight-line prediction of future demand 4. Adjust straight-line projection for seasonality to get a seasonalized forecast.
- Seasonality Core 2 5 – Complete Weather Forecast Applications
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- Seasonality Core 2 5 – Complete Weather Forecast Application Massachusetts
In today’s world of interconnected apps & services, you may often need to call another API to get ormodify information.
In this article I’d like to show you how to do the following:
- call another API in a reliable fashion
- receive and parse the result so that your app can work with it
- display the result on a web page
Let’s get on with it!
Setting your project up
This tutorial uses ASP.NET Core 3 MVC. If you are using a different version, some of the stepsmay need to be modified.
If you are starting from scratch, you can just create a new ASP.NET Core MVC project by running thefollowing command:
where
MyMvcApp
is the name for your new project. If you already have a project, ignore this step.Warning! The step below is only going to work if your project is using .NET Core2.2 or a higher version. If you're on a lower version, you really should upgrade. Alternatively,just create a new project that runs on the latest .NET Core
Given your app will be calling some remote API, you want to make sure that in case of a flakyconnection or a timeout it’s going to re-try to eventually get the data. That’s why you going toneed to add a reference to
Microsoft.Extensions.Http.Polly
package. To read more about Polly andre-try policies, check out this article: “Implement HTTP call retries with exponential backoff withHttpClientFactory and Polly policies”Snapselect 1 3 0 – discover best photos eliminate duplicates. So, to add this package, run this command from your project folder (that’s where your
.csproj
resides):Also, you’ll need a Newtonsoft.Json package so that you could turn all this JSON into neat C#objects that are easier to work with. So go ahead and run this command to add it:
Haaang on, wait, but why do I need all this?
There are several approaches and classes you may use to call external APIs, and you might have come acrosssome of them already - classes like
WebClient
or HttpClient
. While still working, they providequite manual and low-level access to APIs. However in web apps, since they may have several threadsrunning and calling different APIs, you want to let the application manage creation, re-use and disposal of these resources.That’s why one of the recommended practices at the moment is to use Http Client Factory pattern.That is a standard part of .NET Core, and it takes good care of things like configuring
HttpClient
s, managing creation and disposal of them (to avoid socket exhaustion, that’s when OSruns out of available network sockets) and does a few more things for you – see here for thecomplete list.Also, feel free to check out all the use cases of the Http Client Factory here – the class iseasy to use and examples are quite clear.
You will also need Polly (the package you just installed above) to add retry policies.
Configuring your web app
Add the following code to the
Startup.cs
file:In this example we are going to use weather forecasting API from MetaWeather - it’s free anddoesn’t need any API keys or other credentials, so should be easy to get working on your computer.Download complete, fully tested and working project for this article if you want tosave yourself all the typing or if you run into any issues along the way.
Call all the APIs!
OMG can’t believe we actually got here after all this setup! Bear with me, we’re really close, soonyou’ll be getting that sweet JSON and displaying it!
Seasonality Core 2 5 – Complete Weather Forecast Applications
First of all, you’ll need to create a class (or set of classes) to represent your JSON structures inC#. Luckily, there’s a web app for that! Head to http://json2csharp.com/, paste your expectedJSON response in there, click ‘Generate’ and you’ll get your C# class(es).
I am going to use this MetaWeather API response to generate C# classes. Vitamin r 2 54 – personal productivity tool reviews. Feel free to change thegenerated class names, however, do not change the field names, as those need to match your JSON.
In my case, I get something like this:
Now it’s time to call the API, and turn the response into an instance of that freshly created class.In one of your controllers, add the following code:
Things to pay particular attention to:
- Notice how we get an instance
HttpClient
with the help ofHttpCientFactory
result.IsSuccessfulStatusCode
needs to be checked before proceeding to retrieve the responseJsonConvert.DeserializeObject<WeatherForecast>()
call does all the magic of converting JSONresponse in string form to C# class instance
Showing the result
Now is the easy bit – you already have your strongly-typed model, representing the JSON result, and you can render it to the user:
Which gives us something like this:
Conclusion
Seasonality Core 2 5 – Complete Weather Forecast Application Online
In this article, you have just learnt how to:
Seasonality Core 2 5 – Complete Weather Forecast Application Massachusetts
- Set up your project to call remote APIs in a reliable, production-ready manner
- Generated C# class(es) to contain data from JSON API that you are calling
- Call the API & deserialse the result into instances of C# class(es)
- Display the result on the page
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