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Getting started - Blazor Server (.NET 7)

Get started with the Enterprise-class Blazor Bootstrap Component library built on the Blazor and Bootstrap CSS framework.

Install Nuget Package

Looking to quickly add Blazor Bootstrap to your project? Use NuGet package manager.

Install-Package Blazor.Bootstrap -Version 1.11.1

Add CSS references

After the <base href="~/" /> tag in the head section in the Pages/_Host.cshtml file, add the following references:

<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-T3c6CoIi6uLrA9TneNEoa7RxnatzjcDSCmG1MXxSR1GAsXEV/Dwwykc2MPK8M2HN" crossorigin="anonymous">
<link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.11.3/font/bootstrap-icons.min.css" rel="stylesheet" />
<link href="_content/Blazor.Bootstrap/blazor.bootstrap.css" rel="stylesheet" />
note

If you use the Blazor Server App Empty template (without demonstration code and Bootstrap), add the following references to the head section in the Pages/_Host.cshtml. There is a known GitHub issue Blazor empty template doesn't load scoped CSS.

<link href="_content/Blazor.Bootstrap/Blazor.Bootstrap.bundle.scp.css" rel="stylesheet" />

Add script references

Insert the following references into the body section of the Pages/_Host.cshtml file, immediately after the _framework/blazor.server.js reference:

<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/js/bootstrap.bundle.min.js" integrity="sha384-C6RzsynM9kWDrMNeT87bh95OGNyZPhcTNXj1NW7RuBCsyN/o0jlpcV8Qyq46cDfL" crossorigin="anonymous"></script>
<!-- Add chart.js reference if chart components are used in your application. -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/4.0.1/chart.umd.js" integrity="sha512-gQhCDsnnnUfaRzD8k1L5llCCV6O9HN09zClIzzeJ8OJ9MpGmIlCxm+pdCkqTwqJ4JcjbojFr79rl2F1mzcoLMQ==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
<!-- Add chartjs-plugin-datalabels.min.js reference if chart components with data label feature is used in your application. -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/chartjs-plugin-datalabels/2.2.0/chartjs-plugin-datalabels.min.js" integrity="sha512-JPcRR8yFa8mmCsfrw4TNte1ZvF1e3+1SdGMslZvmrzDYxS69J7J49vkFL8u6u8PlPJK+H3voElBtUCzaXj+6ig==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
<script src="_content/Blazor.Bootstrap/blazor.bootstrap.js"></script>
tip

chart.js reference is optional. Add when the Chart components are used in the application.

Register services

Add Blazor Bootstrap service in the Program.cs

builder.Services.AddBlazorBootstrap();

Register tag helpers in _Imports.razor

@using BlazorBootstrap;

Remove default references

The default Blazor template includes demonstration code, icons, and Bootstrap. To remove these components, follow these steps:

  1. Delete the bootstrap and open-iconic folders from the wwwroot directory:

    • Delete the wwwroot/css/bootstrap folder.
    • Delete the wwwroot/css/open-iconic folder.
  2. Remove the following line from Pages/_Host.cshtml file:

    <link rel="stylesheet" href="css/bootstrap/bootstrap.min.css" />
  3. Remove the following line from wwwroot/css/site.css file:

    @import url('open-iconic/font/css/open-iconic-bootstrap.min.css');

Starter template

GitHub Repo: Blazor Bootstrap - Blazor Server App (.NET 7)

Blazor Bootstrap - Blazor Server App

Sample Code

_Host.cshtml

@page "/"
@using Microsoft.AspNetCore.Components.Web
@namespace NET7.BlazorServerApp.Pages
@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<base href="~/" />
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-T3c6CoIi6uLrA9TneNEoa7RxnatzjcDSCmG1MXxSR1GAsXEV/Dwwykc2MPK8M2HN" crossorigin="anonymous">
<link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.11.3/font/bootstrap-icons.min.css" rel="stylesheet" />
<link href="_content/Blazor.Bootstrap/blazor.bootstrap.css" rel="stylesheet" />
<link href="css/site.css" rel="stylesheet" />
<link href="NET7.BlazorServerApp.styles.css" rel="stylesheet" />
<link rel="icon" type="image/png" href="favicon.png" />
<component type="typeof(HeadOutlet)" render-mode="ServerPrerendered" />
</head>
<body>
<component type="typeof(App)" render-mode="ServerPrerendered" />

<div id="blazor-error-ui">
<environment include="Staging,Production">
An error has occurred. This application may no longer respond until reloaded.
</environment>
<environment include="Development">
An unhandled exception has occurred. See browser dev tools for details.
</environment>
<a href="" class="reload">Reload</a>
<a class="dismiss">🗙</a>
</div>

<script src="_framework/blazor.server.js"></script>
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/js/bootstrap.bundle.min.js" integrity="sha384-C6RzsynM9kWDrMNeT87bh95OGNyZPhcTNXj1NW7RuBCsyN/o0jlpcV8Qyq46cDfL" crossorigin="anonymous"></script>
<!-- Add chart.js reference if chart components are used in your application. -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/4.0.1/chart.umd.js" integrity="sha512-gQhCDsnnnUfaRzD8k1L5llCCV6O9HN09zClIzzeJ8OJ9MpGmIlCxm+pdCkqTwqJ4JcjbojFr79rl2F1mzcoLMQ==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
<!-- Add chartjs-plugin-datalabels.min.js reference if chart components with data label feature is used in your application. -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/chartjs-plugin-datalabels/2.2.0/chartjs-plugin-datalabels.min.js" integrity="sha512-JPcRR8yFa8mmCsfrw4TNte1ZvF1e3+1SdGMslZvmrzDYxS69J7J49vkFL8u6u8PlPJK+H3voElBtUCzaXj+6ig==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
<script src="_content/Blazor.Bootstrap/blazor.bootstrap.js"></script>
</body>
</html>

Program.cs

using Microsoft.AspNetCore.Components;
using Microsoft.AspNetCore.Components.Web;
using NET7.BlazorServerApp.Data;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
builder.Services.AddRazorPages();
builder.Services.AddServerSideBlazor();
builder.Services.AddSingleton<WeatherForecastService>();
builder.Services.AddBlazorBootstrap();

var app = builder.Build();

// Configure the HTTP request pipeline.
if (!app.Environment.IsDevelopment())
{
app.UseExceptionHandler("/Error");
// The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
app.UseHsts();
}

app.UseHttpsRedirection();

app.UseStaticFiles();

app.UseRouting();

app.MapBlazorHub();
app.MapFallbackToPage("/_Host");

app.Run();

_Imports.razor

@using System.Net.Http
@using Microsoft.AspNetCore.Authorization
@using Microsoft.AspNetCore.Components.Authorization
@using Microsoft.AspNetCore.Components.Forms
@using Microsoft.AspNetCore.Components.Routing
@using Microsoft.AspNetCore.Components.Web
@using Microsoft.AspNetCore.Components.Web.Virtualization
@using Microsoft.JSInterop
@using NET7.BlazorServerApp
@using NET7.BlazorServerApp.Shared
@using BlazorBootstrap;

MainLayout.razor

@inherits LayoutComponentBase

<div class="bb-page">

<Sidebar @ref="sidebar"
IconName="IconName.BootstrapFill"
Title="Blazor Bootstrap"
DataProvider="SidebarDataProvider" />

<main>
<div class="bb-top-row px-4 d-flex justify-content-end">
<a href="https://docs.microsoft.com/aspnet/" target="_blank">About</a>
</div>

<article class="content px-4">
<div class="py-2">
@Body
</div>
</article>
</main>

</div>

<Modal IsServiceModal="true" />
<Preload />
<Toasts class="p-3" AutoHide="true" Delay="4000" Placement="ToastsPlacement.TopRight" />

@code {
private Sidebar sidebar = default!;
private IEnumerable<NavItem> navItems = default!;

private async Task<SidebarDataProviderResult> SidebarDataProvider(SidebarDataProviderRequest request)
{
if (navItems is null)
navItems = GetNavItems();

return await Task.FromResult(request.ApplyTo(navItems));
}

private IEnumerable<NavItem> GetNavItems()
{
navItems = new List<NavItem>
{
new NavItem { Id = "1", Href = "/", IconName = IconName.HouseDoorFill, Text = "Home", Match=NavLinkMatch.All},
new NavItem { Id = "2", Href = "/counter", IconName = IconName.PlusSquareFill, Text = "Counter"},
new NavItem { Id = "3", Href = "/fetchdata", IconName = IconName.Table, Text = "Fetch Data"},
};

return navItems;
}
}