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Download file download

For direct download of physical files

Example:
Razor code
<Button OnClick="DownloadFile">Click me to download the file</Button>
C# code
private async Task DownloadFileAsync()
{
    using var content = await GenerateFileAsync();
    await downloadService.DownloadAsync("test file", content);

    static async Task<Stream> GenerateFileAsync()
    {
        var ms = new MemoryStream();
        var writer = new StreamWriter(ms);
        await writer.WriteLineAsync("Self-generated and written text, here can be replaced with pictures or other content");
        await writer.FlushAsync();
        ms.Position = 0;
        return ms;
    }
}

Download files directly by setting the physical path

Demo

By setting the physical path of the folder, the files in the directory are packaged and compressed and downloaded

Demo

This simulation generates a text file of 1 million lines, about 58M, which can be tested by yourself

Demo

The button sets the value of IsAsync to true for asynchronous download operation

Simulate the situation where the verification code is generated directly from the front-end page or the uploaded image is not saved and displayed directly.

Demo

Since the test uses the files under wwwroot, there is no code generation, and wasm cannot access the wwwroot folder, so only the ssr mode is available for the test. wasm please test it yourself.

@page "/downloads"
@inject IStringLocalizer<Downloads> Localizer

<h3>Download file download</h3>
<h4>For direct download of physical files</h4>

<Tips>
    <b>pay attention:</b>
    <div>
        @((@MarkupString)Localizer["P2"].Value)
    </div>
</Tips>

<div class="mb-3">
    @((@MarkupString)Localizer["P4"].Value):
    <Button Icon="fa-solid fa-download" Text="download file" OnClick="@DownloadFileAsync"></Button>
</div>
<div class="mb-2">@((@MarkupString)Localizer["P6"].Value)</div>
<Pre><Button OnClick="DownloadFile">Click me to download the file</Button></Pre>
<div class="mb-2">@((@MarkupString)Localizer["P8"].Value)</div>
<Pre>private async Task DownloadFileAsync()
{
    using var content = await GenerateFileAsync();
    await downloadService.DownloadAsync("test file", content);

    static async Task<Stream> GenerateFileAsync()
    {
        var ms = new MemoryStream();
        var writer = new StreamWriter(ms);
        await writer.WriteLineAsync("Self-generated and written text, here can be replaced with pictures or other content");
        await writer.FlushAsync();
        ms.Position = 0;
        return ms;
    }
}</Pre>

@if (!IsWasm)
{
    <DemoBlock Title="normal download" Introduction="Download files directly by setting the physical path" Name="Normal">
        <Button IsAsync="true" Icon="fa-solid fa-download" Text="download" OnClickWithoutRender="DownloadPhysicalFileAsync"></Button>
    </DemoBlock>

    <DemoBlock Title="Folder download" Introduction="By setting the physical path of the folder, the files in the directory are packaged and compressed and downloaded" Name="Folder">
        <Button IsAsync="true" Icon="fa-solid fa-download" Text="download" OnClickWithoutRender="DownloadFolderAsync"></Button>
    </DemoBlock>
}

<DemoBlock Title="Large file download test" Introduction="This simulation generates a text file of <code>1 million lines</code>, about <b>58M</b>, which can be tested by yourself" Name="BigFile">
    <p>The button sets the value of <code>IsAsync</code> to <code>true</code> for asynchronous download operation</p>
    <Button IsAsync="true" Icon="fa-solid fa-download" Text="Download" OnClickWithoutRender="DownloadLargeFileAsync"></Button>
</DemoBlock>

@if(!IsWasm)
{
    <DemoBlock Title="Get the picture and display it" Introduction="Simulate the situation where the verification code is generated directly from the front-end page or the uploaded image is not saved and displayed directly." Name="Image">
        <p>Since the test uses the files under <code>wwwroot</code>, there is no code generation, and <code>wasm</code> cannot access the <code>wwwroot</code> folder, so only the <code>ssr</code> mode is available for the test. <code>wasm</code> please test it yourself.</p>
        <img src="@TempUrl" style="width: 120px; height: auto;" />
    </DemoBlock>
}
// Copyright (c) Argo Zhang (argo@163.com). All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
// Website: https://www.blazor.zone or https://argozhang.github.io/

using Microsoft.Extensions.Options;

namespace BootstrapBlazor.Shared.Samples;

/// <summary>
/// Title 网站标题示例代码
/// </summary>
public partial class Downloads
{
    [Inject]
    [NotNull]
    private ToastService? ToastService { get; set; }

    [Inject]
    [NotNull]
    private DownloadService? DownloadService { get; set; }

    [Inject]
    [NotNull]
    private IOptionsMonitor<WebsiteOptions>? SiteOptions { get; set; }

    private string TempUrl { get; set; } = "./favicon.png";

    private static bool IsWasm => OperatingSystem.IsBrowser();

    private async Task DownloadFileAsync()
    {
        using var stream = await GenerateFileAsync();
        await DownloadService.DownloadFromStreamAsync("测试文件.txt", stream);

        static async Task<Stream> GenerateFileAsync()
        {
            var ms = new MemoryStream();
            var writer = new StreamWriter(ms);
            await writer.WriteLineAsync("自行生成并写入的文本,这里可以换成图片或其他内容");
            await writer.FlushAsync();
            ms.Position = 0;
            return ms;
        }
    }

    private async Task DownloadLargeFileAsync()
    {
        using var stream = await GenerateFileStreamAsync();
        await DownloadService.DownloadFromStreamAsync("测试大文件.txt", stream);

        static async Task<Stream> GenerateFileStreamAsync()
        {
            var ms = new MemoryStream();
            var writer = new StreamWriter(ms);
            for (var i = 0; i < 1000000; i++)
            {
                await writer.WriteLineAsync($"这里是一个大文件下载示例,共循环 100 万次");
            }
            await writer.FlushAsync();
            ms.Position = 0;
            return ms;
        }
    }

    private async Task DownloadPhysicalFileAsync()
    {
        try
        {
            var filePath = Path.Combine(SiteOptions.CurrentValue.WebRootPath, "favicon.png");
            using var stream = File.OpenRead(filePath);
            await DownloadService.DownloadFromStreamAsync("favicon.png", stream);
        }
        catch (FileNotFoundException msg)
        {
            await ToastService.Error("下载", msg.Message);
        }
    }

    private async Task DownloadFolderAsync()
    {
        try
        {
            await DownloadService.DownloadFolderAsync("test.zip", SiteOptions.CurrentValue.WebRootPath);
        }
        catch (FileNotFoundException msg)
        {

            await ToastService.Error("下载", msg.Message);
        }
    }
}

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Bootstrap Blazor Component library updated to 7.0.8-beta05

Bootstrap Blazor at present has more than 120 components. This component is based on Bootstrap Blazor An enterprise-level component library that provides several types of common components such as layout, navigation, form, data, notification, icon, voice, etc. Each component has been carefully designed with modularity, responsiveness and excellent performance. Starting from more practical scenarios, meeting the needs of various scenarios, greatly reducing the time cost of developers, greatly shortening the development cycle, greatly improving development efficiency, and providing a set of General Rights Management System Example project。Bootstrap Blazor Products are maintained by a professional full-time technical team, with efficient response speed, diversified solutions, long-term support, and enterprise-level support. At present, it has been used in many well-known state-owned enterprises, and the project is running stably with a maximum of 1200 people online. On the right is the QR code of the Chinese Blazor QQ community with the largest number of people in China, welcome to scan and join the group.

component updated to 6.6.0 Change log [portal] If the component brings you convenience, please help to light up the project Star github gitee

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