garymbansal / dotnet-00-razor-blazor-azure

dotnet-core-razor-blazor-azure

Framework & Tools

• .NET Core 3.1
• Visual Studio 2019
• C#
• Razor
• Blazor
• Web API
• JSON
• Azure

Project Structure

• wwwroot > data > products.json (Database)
• Components > ProductList.razor (Blazor Component)
• Controllers > ProductsController.cs (API Controller)
• Models > Product.cs (Object Model)
• Services > JSONFileProductService.cs (Data Service)

Startup.cs

public void ConfigureServices(IServiceCollection services)
{
    services.AddRazorPages();
    services.AddServerSideBlazor();
    services.AddControllers();
    services.AddTransient<JSONFileProductService>();
}

• Adds services for Razor pages to the specified IServiceCollection. AddRazorPages(), AddControllers(), AddControllersWithViews()
• Adds a transient service of the type specified in serviceType to the specified IServiceCollection. AddTransient(), ServiceLifetime
• Adds Server-Side Blazor services to the service collection. AddServerSideBlazor()

app.UseEndpoints(endpoints =>
{
    endpoints.MapRazorPages();
    //endpoints.MapGet("/products", (context) =>
    //{
    //    var products = app.ApplicationServices.GetService<JSONFileProductService>().GetProducts();
    //    var json = JsonSerializer.Serialize<IEnumerable<Product>>(products);
    //    return context.Response.WriteAsync(json);
    //});
    endpoints.MapControllers();
    endpoints.MapBlazorHub();
});

• Endpoint Route Binder for Blazor Hub which is a base class for SignalR Hub. MapBlazorHub()

IWebHostEnvironment Interface

Provides information about the web hosting environment an application is running in.

IEnumerable Interface

Great great grand parent for all iterators be it array, list, collection etc.

JsonSerializer

Provides functionality to Serialize objects or values to JSON (JavaScript Object Notation) or to Deserialize JSON to objects or values

JsonPropertyName

Specifies the property name that is present in the JSON when serializing and deserializing. **[JsonPropertyName("img")]**

Reading & Deserializing JSON File data

using (var jsonFileReader = File.OpenText(JsonFileName))
{
    return JsonSerializer.Deserialize<Product[]>(jsonFileReader.ReadToEnd(),
    new JsonSerializerOptions
    {
        PropertyNameCaseInsensitive = true
    });
}

Writing & Serializing JSON File data

using (var outputStream = File.OpenWrite(JsonFileName))
{
    JsonSerializer.Serialize<IEnumerable<Product>>(
        new Utf8JsonWriter(outputStream, new JsonWriterOptions
        {
            SkipValidation = true,
            Indented = true
        }),
        products
    );
}