지리적 위치를 사용한 Blazor 바인딩 JSON 파일

Ignite UI for Blazor 맵을 사용하면 다양한 파일 유형에서 로드된 지리적 데이터를 플롯할 수 있습니다. 예를 들어, JavaScript Object Notation(JSON) 파일에서 지리적 위치를 로드할 수 있습니다.

Blazor Binding JSON Files with Geographic Locations Example

EXAMPLE

MODULES

RAZOR

CSS

using System;
using System.Net.Http;
using System.Collections.Generic;
using System.Threading.Tasks;
using System.Text;
using Microsoft.AspNetCore.Components.WebAssembly.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using IgniteUI.Blazor.Controls; // for registering Ignite UI modules

namespace Infragistics.Samples
{
    public class Program
    {
        public static async Task Main(string[] args)
        {
            var builder = WebAssemblyHostBuilder.CreateDefault(args);
            builder.RootComponents.Add<App>("app");
            builder.Services.AddScoped(sp => new HttpClient { BaseAddress = new Uri(builder.HostEnvironment.BaseAddress) });
            // registering Ignite UI modules
            builder.Services.AddIgniteUIBlazor(
                typeof(IgbGeographicMapModule),
                typeof(IgbDataChartInteractivityModule)
            );
            await builder.Build().RunAsync();
        }
    }
}csコピー

@using System.Net.Http.Json
@using IgniteUI.Blazor.Controls

@inject HttpClient Http

<div class="container vertical">
    <div class="container vertical">
        <IgbGeographicMap Height="100%" Width="100%" Zoomable="true">
            <IgbGeographicSymbolSeries DataSource="Data"
                                    MarkerType="MarkerType.Circle"
                                    LatitudeMemberPath="Lat"
                                    LongitudeMemberPath="Lon"
                                    MarkerBrush="LightGray"
                                    MarkerOutline="Black" />
        </IgbGeographicMap>
    </div>
</div>

@code {
    

    private WorldPlaceJson[] Data;

    protected override async Task OnInitializedAsync()
    {
        var url = "https://static.infragistics.com/xplatform/data/WorldCities.json";
        var http = new HttpClient();
        this.Data = await http.GetFromJsonAsync<WorldPlaceJson[]>(url);

    }

    public class WorldPlaceJson {

        public string Name { get; set; }

        public double Lat { get; set; }

        public double Lon { get; set; }

        public double Pop { get; set; }

        public string Country { get; set; }
        public bool Cap { get; set; }
    }
}razorコピー

/* 
CSS styles are loaded from the shared CSS file located at:
https://static.infragistics.com/xplatform/css/samples/
*/cssコピー

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Data Example

다음은 JSON 파일의 데이터 예입니다.

[
   { "name": "Sydney Island", "lat": -16.68972, "lon": 139.45917 },
   { "name": "Sydney Creek",  "lat": -16.3,     "lon": 128.95 },
   { "name": "Mount Sydney",  "lat": -21.39864, "lon": 121.193 },
 // ...
]
json

Code Snippet

다음 코드는 지도 구성 요소의 IgbGeographicHighDensityScatterSeries 지리적 위치가 포함된 로드된 JSON 파일에서 생성된 객체 배열에 로드하고 바인딩합니다.

@using System.Net.Http.Json
@using IgniteUI.Blazor.Controls

@inject HttpClient Http

<IgbGeographicMap Height="100%" Width="100%" Zoomable="true">
    <IgbGeographicSymbolSeries DataSource="DataSource"
        MarkerType="MarkerType.Circle"
        LatitudeMemberPath="Lat"
        LongitudeMemberPath="Lon"
        MarkerBrush="LightGray"
        MarkerOutline="Black" />
</IgbGeographicMap>

@code {

    private WorldPlaceJson[] DataSource;

    protected override async Task OnInitializedAsync()
    {
        var url = "https://static.infragistics.com/xplatform/data/WorldCities.json";
        var http = new HttpClient();
        this.DataSource = await http.GetFromJsonAsync<WorldPlaceJson[]>(url);

        await Task.Delay(1);
    }

    public class WorldPlaceJson {

        public string Name { get; set; }
        public double Lat { get; set; }
        public double Lon { get; set; }
        public double Pop { get; set; }
        public string Country { get; set; }
        public bool Cap { get; set; }
    }
}
razor

API References

• IgbGeographicHighDensityScatterSeries
• IgbGeographicSymbolSeries
• GeographicMap
• DataSource
• LatitudeMemberPath
• LongitudeMemberPath