DbFirst/DbFirst.API/Program.cs

using DbFirst.API.Middleware;
using DbFirst.Application;
using DbFirst.Application.Repositories;
using DbFirst.Domain;
using DbFirst.Domain.Entities;
using DbFirst.Infrastructure;
using DbFirst.Infrastructure.Repositories;
using DevExpress.AspNetCore;
using DevExpress.DashboardAspNetCore;
using DevExpress.DashboardCommon;
using DevExpress.DashboardWeb;
using DevExpress.DataAccess.Json;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
builder.Services.AddControllers();
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();

// TODO: allow listed origins configured in appsettings.json
// In any case, dont let them to free to use without cors. if there is no origin specified, block all.
// In development you can keep it easy.
builder.Services.AddCors(options =>
{
    options.AddDefaultPolicy(policy =>
    {
        if (builder.Environment.IsDevelopment())
        {
            policy.AllowAnyOrigin()
                  .AllowAnyHeader()
                  .AllowAnyMethod();
        }
        else
        {
            var origins = builder.Configuration.GetSection("Cors:AllowedOrigins").Get<string[]>() ?? Array.Empty<string>();
            if (origins.Length > 0)
            {
                policy.WithOrigins(origins)
                      .AllowAnyHeader()
                      .AllowAnyMethod();
            }
            // if no origins configured, deny all by leaving policy without allowances
        }
    });
});

builder.Services.AddInfrastructure(builder.Configuration);
builder.Services.AddApplication();

builder.Services.AddScoped<ICatalogRepository, CatalogRepository>();

builder.Services.AddDevExpressControls();
builder.Services.AddScoped<DashboardConfigurator>((IServiceProvider serviceProvider) => {
    var dashboardsPath = Path.Combine(builder.Environment.ContentRootPath, "Data", "Dashboards");
    Directory.CreateDirectory(dashboardsPath);

    var defaultDashboardPath = Path.Combine(dashboardsPath, "DefaultDashboard.xml");
    if (!File.Exists(defaultDashboardPath))
    {
        var defaultDashboard = new Dashboard();
        defaultDashboard.Title.Text = "Default Dashboard";
        defaultDashboard.SaveToXml(defaultDashboardPath);
    }

    var dashboardBaseUrl = builder.Configuration["Dashboard:BaseUrl"]
        ?? builder.Configuration["ApiBaseUrl"]
        ?? builder.Configuration["ASPNETCORE_URLS"]?.Split(';', StringSplitOptions.RemoveEmptyEntries).FirstOrDefault()
        ?? "https://localhost:7204";

    dashboardBaseUrl = dashboardBaseUrl.TrimEnd('/');

    var catalogsGridDashboardPath = Path.Combine(dashboardsPath, "CatalogsGrid.xml");
    if (!File.Exists(catalogsGridDashboardPath))
    {
        var dashboard = new Dashboard();
        dashboard.Title.Text = "Catalogs (Dashboard Grid)";

        var catalogDataSource = new DashboardJsonDataSource("Catalogs (API)")
        {
            ComponentName = "catalogsDataSource",
            JsonSource = new UriJsonSource(new Uri($"{dashboardBaseUrl}/api/catalogs"))
        };

        dashboard.DataSources.Add(catalogDataSource);

        var grid = new GridDashboardItem
        {
            DataSource = catalogDataSource,
            Name = "Catalogs"
        };

        grid.Columns.Add(new GridDimensionColumn(new Dimension(nameof(VwmyCatalog.Guid))) { Name = "Id" });
        grid.Columns.Add(new GridDimensionColumn(new Dimension(nameof(VwmyCatalog.CatTitle))) { Name = "Titel" });
        grid.Columns.Add(new GridDimensionColumn(new Dimension(nameof(VwmyCatalog.CatString))) { Name = "String" });
        grid.Columns.Add(new GridDimensionColumn(new Dimension(nameof(VwmyCatalog.AddedWho))) { Name = "Angelegt von" });
        grid.Columns.Add(new GridDimensionColumn(new Dimension(nameof(VwmyCatalog.AddedWhen))) { Name = "Angelegt am" });
        grid.Columns.Add(new GridDimensionColumn(new Dimension(nameof(VwmyCatalog.ChangedWho))) { Name = "Geändert von" });
        grid.Columns.Add(new GridDimensionColumn(new Dimension(nameof(VwmyCatalog.ChangedWhen))) { Name = "Geändert am" });

        dashboard.Items.Add(grid);

        var layoutGroup = new DashboardLayoutGroup { Orientation = DashboardLayoutGroupOrientation.Vertical };
        layoutGroup.ChildNodes.Add(new DashboardLayoutItem(grid));
        dashboard.LayoutRoot = layoutGroup;

        dashboard.SaveToXml(catalogsGridDashboardPath);
    }

    DashboardConfigurator configurator = new DashboardConfigurator();
    configurator.SetDashboardStorage(new DashboardFileStorage(dashboardsPath));

    DataSourceInMemoryStorage dataSourceStorage = new DataSourceInMemoryStorage();
    DashboardJsonDataSource jsonDataSourceUrl = new DashboardJsonDataSource("JSON Data Source (URL)");
    jsonDataSourceUrl.JsonSource = new UriJsonSource(
            new Uri("https://raw.githubusercontent.com/DevExpress-Examples/DataSources/master/JSON/customers.json"));
    jsonDataSourceUrl.RootElement = "Customers";
    dataSourceStorage.RegisterDataSource("jsonDataSourceUrl", jsonDataSourceUrl.SaveToXml());

    var catalogsJsonDataSource = new DashboardJsonDataSource("Catalogs (API)")
    {
        ComponentName = "catalogsDataSource",
        JsonSource = new UriJsonSource(new Uri($"{dashboardBaseUrl}/api/catalogs"))
    };
    dataSourceStorage.RegisterDataSource(catalogsJsonDataSource.ComponentName, catalogsJsonDataSource.SaveToXml());
    dataSourceStorage.RegisterDataSource(catalogsJsonDataSource.Name, catalogsJsonDataSource.SaveToXml());

    configurator.SetDataSourceStorage(dataSourceStorage);
    return configurator;
});

var app = builder.Build();

// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.UseSwagger();
    app.UseSwaggerUI();
}

app.UseMiddleware<ExceptionHandlingMiddleware>();

app.UseDevExpressControls();
app.UseHttpsRedirection();
app.UseCors();
app.UseAuthorization();

app.MapDashboardRoute("api/dashboard", "DefaultDashboard");

app.MapControllers();

app.Run();