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Added Getting Started Sample for Blazor Dropdown List
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App.razor

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<Router AppAssembly="@typeof(Program).Assembly">
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<Found Context="routeData">
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<RouteView RouteData="@routeData" DefaultLayout="@typeof(MainLayout)" />
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</Found>
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<NotFound>
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<LayoutView Layout="@typeof(MainLayout)">
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<p>Sorry, there's nothing at this address.</p>
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</LayoutView>
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</NotFound>
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</Router>

Data/WeatherForecast.cs

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using System;
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namespace dropdown_list.Data
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{
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public class WeatherForecast
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{
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public DateTime Date { get; set; }
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public int TemperatureC { get; set; }
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public int TemperatureF => 32 + (int)(TemperatureC / 0.5556);
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public string Summary { get; set; }
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}
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}

Data/WeatherForecastService.cs

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using System;
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using System.Linq;
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using System.Threading.Tasks;
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namespace dropdown_list.Data
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{
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public class WeatherForecastService
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{
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private static readonly string[] Summaries = new[]
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{
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"Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching"
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};
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public Task<WeatherForecast[]> GetForecastAsync(DateTime startDate)
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{
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var rng = new Random();
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return Task.FromResult(Enumerable.Range(1, 5).Select(index => new WeatherForecast
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{
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Date = startDate.AddDays(index),
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TemperatureC = rng.Next(-20, 55),
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Summary = Summaries[rng.Next(Summaries.Length)]
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}).ToArray());
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}
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}
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}

Pages/Counter.razor

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@page "/counter"
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<h1>Counter</h1>
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<p>Current count: @currentCount</p>
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<button class="btn btn-primary" @onclick="IncrementCount">Click me</button>
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@code {
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private int currentCount = 0;
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private void IncrementCount()
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{
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currentCount++;
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}
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}

Pages/Error.razor

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@page "/error"
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<h1 class="text-danger">Error.</h1>
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<h2 class="text-danger">An error occurred while processing your request.</h2>
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<h3>Development Mode</h3>
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<p>
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Swapping to <strong>Development</strong> environment will display more detailed information about the error that occurred.
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</p>
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<p>
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<strong>The Development environment shouldn't be enabled for deployed applications.</strong>
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It can result in displaying sensitive information from exceptions to end users.
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For local debugging, enable the <strong>Development</strong> environment by setting the <strong>ASPNETCORE_ENVIRONMENT</strong> environment variable to <strong>Development</strong>
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and restarting the app.
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</p>

Pages/FetchData.razor

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@page "/fetchdata"
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@using dropdown_list.Data
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@inject WeatherForecastService ForecastService
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<h1>Weather forecast</h1>
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<p>This component demonstrates fetching data from a service.</p>
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@if (forecasts == null)
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{
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<p><em>Loading...</em></p>
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}
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else
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{
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<table class="table">
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<thead>
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<tr>
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<th>Date</th>
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<th>Temp. (C)</th>
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<th>Temp. (F)</th>
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<th>Summary</th>
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</tr>
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</thead>
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<tbody>
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@foreach (var forecast in forecasts)
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{
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<tr>
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<td>@forecast.Date.ToShortDateString()</td>
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<td>@forecast.TemperatureC</td>
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<td>@forecast.TemperatureF</td>
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<td>@forecast.Summary</td>
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</tr>
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}
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</tbody>
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</table>
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}
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@code {
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private WeatherForecast[] forecasts;
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protected override async Task OnInitializedAsync()
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{
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forecasts = await ForecastService.GetForecastAsync(DateTime.Now);
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}
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}

Pages/Index.razor

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@page "/"
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<div class="control">
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<EjsDropDownList TItem="EmployeeData" TValue="string"
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Placeholder="Select a name"
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PopupWidth="250px" PopupHeight="400px"
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SortOrder=Syncfusion.EJ2.Blazor.Lists.SortOrder.Descending>
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<DropDownListFieldSettings Text="FirstName"
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Value="EmployeeID">
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</DropDownListFieldSettings>
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<EjsDataManager
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URL="https://ej2services.syncfusion.com/production/web-services/api/Employees"
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Adaptor="Syncfusion.EJ2.Blazor.Adaptors.WebApiAdaptor"
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CrossDomain=true >
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</EjsDataManager>
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</EjsDropDownList>
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</div>
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<style>
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.control {
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width: 250px;
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margin: 10%;
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}
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</style>
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@code {
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public class EmployeeData {
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public string FirstName { get; set; }
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public string EmployeeID { get; set; }
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public string Designation { get; set; }
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public string Country { get; set; }
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}
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}

Pages/_Host.cshtml

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@page "/"
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@namespace dropdown_list.Pages
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@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers
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@{
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Layout = null;
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}
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1.0" />
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<title>dropdown-list</title>
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<base href="~/" />
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<link rel="stylesheet" href="css/bootstrap/bootstrap.min.css" />
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<link href="css/site.css" rel="stylesheet" />
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<link href="https://cdn.syncfusion.com/ej2/17.4.49/material.css" rel="stylesheet" />
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<script src="https://cdn.syncfusion.com/ej2/17.4.49/dist/ej2.min.js"></script>
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<script src="https://cdn.syncfusion.com/ej2/17.4.49/dist/ejs.interop.min.js"></script>
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</head>
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<body>
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<app>
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<component type="typeof(App)" render-mode="ServerPrerendered" />
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</app>
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<div id="blazor-error-ui">
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<environment include="Staging,Production">
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An error has occurred. This application may no longer respond until reloaded.
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</environment>
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<environment include="Development">
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An unhandled exception has occurred. See browser dev tools for details.
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</environment>
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<a href="" class="reload">Reload</a>
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<a class="dismiss">🗙</a>
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</div>
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<script src="_framework/blazor.server.js"></script>
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</body>
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</html>

Program.cs

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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Threading.Tasks;
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using Microsoft.AspNetCore;
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using Microsoft.AspNetCore.Hosting;
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using Microsoft.Extensions.Configuration;
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using Microsoft.Extensions.Hosting;
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using Microsoft.Extensions.Logging;
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namespace dropdown_list
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{
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public class Program
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{
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public static void Main(string[] args)
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{
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CreateHostBuilder(args).Build().Run();
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}
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public static IHostBuilder CreateHostBuilder(string[] args) =>
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Host.CreateDefaultBuilder(args)
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.ConfigureWebHostDefaults(webBuilder =>
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{
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webBuilder.UseStartup<Startup>();
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});
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}
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}

Properties/launchSettings.json

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{
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"iisSettings": {
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"windowsAuthentication": false,
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"anonymousAuthentication": true,
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"iisExpress": {
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"applicationUrl": "http://localhost:28491",
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"sslPort": 44323
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}
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},
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"profiles": {
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"IIS Express": {
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"commandName": "IISExpress",
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"launchBrowser": true,
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"environmentVariables": {
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"ASPNETCORE_ENVIRONMENT": "Development"
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}
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},
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"dropdown-list": {
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"commandName": "Project",
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"launchBrowser": true,
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"applicationUrl": "https://localhost:5001;http://localhost:5000",
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"environmentVariables": {
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"ASPNETCORE_ENVIRONMENT": "Development"
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}
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}
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}
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}

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