使用Net将HTML简历导出为PDF格式

Posted 2023-03-21 baibaomen-org

现在有许多将HTML导出PDF的第三方包，这里介绍使用的是Select.HtmlToPdf.NetCore

使用Select.HtmlToPdf.NetCore

1. 整体思路是将cshtml内容读出来，然后再转为Pdf文档
2. 读取cshtml内容有两种方法，第一种使用第三方包 RazorEngine.NetCore，第二种使用官方方法进行读取。（注意两种方法的cshtml内容略有不同）

效果图展示

在线演示地址

我把所有的源代码都上传到了我的个人Github，有需要的请自取：https://github.com/WeiMing0803/ExportPdf

首先使用ChatGPT生成个人简历信息

代码部分

HomeController.cs :

public async Task<IActionResult> ToPdf()

    PdfDocument pdfDocument = new PdfDocument();
    HtmlToPdf converter = new HtmlToPdf();//实例化一个html到pdf转换器对象
    converter.Options.PdfPageOrientation = PdfPageOrientation.Portrait;//设置页面方向
    converter.Options.PdfPageSize = PdfPageSize.A4;//设置页面大小
    converter.Options.MarginTop = 10;//设置页边距
    converter.Options.MarginBottom = 10;
    converter.Options.MarginLeft = 10;
    converter.Options.MarginRight = 10;

    PdfReportModel model = new PdfReportModel  Name = "彭于晏", Email = "[e-mail]" ;
    //string htmlResult = readByEngineRazor(model);//第一种方法，使用RazorEngine.NetCore读取Cshtml文件
    string htmlResult = await readCshtml(model);//第二种方法
    
    if (!string.IsNullOrEmpty(htmlResult))
    
        pdfDocument = converter.ConvertHtmlString(htmlResult);
    
    
    string savePath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), $@"ExportPDF\\DateTime.Now.ToString("yyyyMMdd")");
    Directory.CreateDirectory(savePath);
    string filename = Path.Combine(savePath, $"DateTime.Now.ToString("yyyyMMddHHmmssffff").pdf");
    pdfDocument.Save(filename);

    byte[] bytes = System.IO.File.ReadAllBytes(filename);
    return File(bytes, "application/pdf", Path.GetFileName(filename));


 private string readByEngineRazor(PdfReportModel model)

    string template = System.IO.File.ReadAllText("Views/Report/PdfReport.cshtml");
    string htmlResult = Engine.Razor.RunCompile(template, "PdfReport", typeof(PdfReportModel), model);
    return htmlResult;


private async Task<string> readCshtml(PdfReportModel model)

    string htmlResult = await _viewRenderService.RenderToStringAsync("Report/PdfReport", model);
    return htmlResult;

TemplateGadgetProvider.cs :

public class TemplateGadgetProvider

    public static TemplateGadgetProvider _instance;
    public static TemplateGadgetProvider Instance
    
        get
        
            if (_instance == null)
                _instance = new TemplateGadgetProvider();
            return _instance;
        
    

    public string Load(string virtualPath)
    
        return File.ReadAllText(virtualPath);
    

pdfReport.css :

Css样式文件：点击查看详细内容

html 
    font-family: \'Open Sans\', sans-serif;
    background: whitesmoke;


a 
    text-decoration: none;
    color: black;


hr 
    background: grey;


#container 
    position: relative;
    display: flex;


#profile 
    flex: 15%;
    display: block;
    position: relative;
    margin: 5% 2% 0 10%;
    width: 100%;
    height: 100%;


#info-cards 
    flex: 55%;
    display: block;
    margin-top: 5%;
    margin-right: 10%;
    width: 100%;
    height: 100%;


#image 
    position: relative;
    overflow: hidden;


#image,
#profile-photo 
    position: relative;
    width: 80px;
    height: 80px;
    border-radius: 10px;


    #image > a 
        position: absolute;
        top: 0;
        left: 0;
        background: rgba(0, 0, 0, 0.5) !important;
        height: 100%;
        width: 100%;
        display: none;
    

        #image > a > i 
            -webkit-text-stroke: 1px #ffffffdd;
            padding: 40%;
        

    #image:hover a 
        display: block;
    

#name 
    font-size: 23px !important;
    line-height: 20px !important;


#about,
.card > ul > li 
    padding: 0 0 0 15px;
    position: relative;
    display: inline-block;
    width: 100%;


#about 
    font-size: 20px !important;
    padding: 0 !important;


    #name,
    #about > p 
        font-weight: bolder;
        font-family: \'Open Sans\', sans-serif;
    

#email 
    font-size: 15px !important;
    font-weight: bold !important;
    font-family: \'Cutive Mono\', monospace;


#college,
#email,
#year-graduation,
#education,
#more-about,
#telephone,
#fax 
    color: #555;
    font-size: 13.5px;


strong,
span 
    color: black;
    font-size: 16px;


#social-links,
#about 
    display: inline-block;


#social-links 
    margin-bottom: 12px;


    #social-links a 
        margin: 0 10px;
    

#edit-intro 
    display: block;
    color: #097bbf;
    font-family: \'Nunito\', sans-serif;


.fab 
    font-size: 1.1em;


.fab,
.fas 
    color: whitesmoke;


#about > a 
    top: 4px;
    right: 8px;


.edit 
    top: 19px;
    right: 10px;


#about > a,
.edit 
    position: absolute;
    font-size: 15px !important;


.stroke-transparent 
    -webkit-text-stroke: 1px #000;
    -webkit-text-fill-color: transparent;


.blue 
    color: #097bbf !important;
    font-size: 13px;


.stroke-transparent-blue 
    -webkit-text-stroke: 1px #097bbf;
    -webkit-text-fill-color: transparent;


.card 
    box-shadow: 0 3px 10px 0 rgba(0, 0, 0, .1);
    overflow-x: hidden;
    margin-bottom: 30px;
    padding: 15px 30px 30px 30px;
    background-color: #fff;


    .card > p 
        color: #0e141e;
        font-weight: bolder;
        font-size: 18px;
        line-height: 2;
    

        .card > p > i 
            font-size: 18px;
        

    .card > a 
        font-weight: 400;
        font-size: 15px;
        margin: 0;
        margin-left: 25px;
        padding: 0;
        border: 0;
        height: auto;
        background: transparent;
        color: #097bbf;
        outline: none;
        cursor: pointer;
    

    .card > ul 
        list-style-type: none;
    

.tags 
    font-size: 17px;
    font-weight: bolder;


    .tags ~ a 
        display: none !important;
    

    .tags span 
        font-size: 14px;
        font-weight: normal;
        color: #0e141e;
    

        .tags span span 
            color: #738f93;
        

@media screen and (max-width:1090px) 
    #profile 
        margin-left: 5%;
    


@media screen and (max-width:850px) 
    #container 
        display: block;
    

    #profile 
        width: 90%;
    

    .card 
        margin: 0 5%;
        margin-bottom: 30px;
    

PdfReport.cshtml :

使用RazorEngine.NetCore需要修改下面两处地方

1. 删除 @model PdfReportModel
2. 将@Html.Raw(@style) 修改为 @@Raw(@style)

视图文件：点击查看详细内容

@using exportPdf.common
@model PdfReportModel   

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    @
        string style = TemplateGadgetProvider.Instance.Load(@"wwwroot\\css\\pdfReport.css");
    
    <style>@Html.Raw(@style)</style>
</head>

<body>
    <div id="inner-nav"></div>
    <div id="container">
        <div id="profile">
            <div id="image">
                <img id="profile-photo" src="https://img2023.cnblogs.com/blog/233608/202303/233608-20230308165653594-2049775608.jpg" >
                <a href="#"><i class="fas fa-pen stroke-transparent"></i></a>
            </div>
            <p id="name">@Model.Name<br><span id="email">@Model.Email</span></p>
            <p id="designation">前端开发工程师<br><span id="college">天将降大任于斯人也，必先苦其心志，劳其筋骨，饿其体肤，空乏其身，行拂乱其所为也，所以动心忍性，增益其所不能。——《孟子》 </span></p>
            <div id="social-links"><a href="#"><i class="fab fa-facebook-f stroke-transparent"></i></a><a><i
                        class="fab fa-twitter stroke-transparent"></i></a><a><i
                        class="fab fa-linkedin-in stroke-transparent"></i></a><a><i
                        class="fab fa-github stroke-transparent"></i></a></div>
            <a id="edit-intro" href="#"><i class="fas fa-pen-alt blue"></i>&nbsp;&nbsp;</a>
            <hr >
            <div id="about">
                <p >个人详情</p>
                <a href="#"><i class="fas fa-pen stroke-transparent-blue"></i></a>
            </div>
            <p id="year-graduation">预计毕业年份<br><strong>2023年6月</strong></p>
            <p id="education">学历<br><strong>湖南大学 本科</strong></p>
            <p id="more-about">专业<br><strong> 计算机科学与技术专业</strong></p>
            <p id="telephone">电话<br><strong>0532-2271351</strong></p>
            <p id="fax">传真<br><strong>[phone]</strong></p>
        </div>
        <div id="info-cards">
            <div class="card">
                <p><i class="fas fa-briefcase stroke-transparent"></i>&nbsp;&nbsp;&nbsp;专业技能</p>
                <ul>
                    <li>
                        <p class="tags">1. 熟练掌握HTML、CSS、JavaScript等前端基础技术</p>
                    </li>
                    <li>
                        <p class="tags">2. 熟悉jQuery、Bootstrap等常用前端框架和库</p>
                    </li>
                    <li>
                        <p class="tags">3. 了解Node.js、Express等后端开发技术</p>
                    </li>
                    <li>
                        <p class="tags">4. 掌握Git、Webpack等常用开发工具</p>
                    </li>
                    <li>
                        <p class="tags">5. 具备良好的编码风格和文档习惯</p>
                    </li>
                </ul>
            </div>
            <div class="card">
                <p><i class="fas fa-briefcase stroke-transparent"></i>&nbsp;&nbsp;&nbsp;工作检验</p>
                <ul>
                    <li>
                        <p class="tags">1. 依帆网站首页制作（个人项目）<br>
    - 使用HTML、CSS、JavaScript实现了一个响应式的网站首页<br>
    - 使用Bootstrap进行布局和样式美化，使用jQuery实现轮播图和导航栏效果<br>
    - 使用Webpack进行打包和优化，使用Git进行版本控制和部署</p>
                    </li>
                    <li>
                        <p class="tags">2. 艺风网站后台管理系统（实习项目）<br>
    - 参与了一个基于Node.js和Express的后台管理系统的开发<br>
    - 负责前端页面的编写，使用EJS模板引擎渲染数据<br>
    - 使用Ajax和Fetch进行数据交互，使用Element UI组件库提升用户体验<br>
    - 遵循MVC架构，使用Mongoose操作MongoDB数据库</p>
                    </li>
                </ul>
            </div>
            <div class="card">
                <p><i class="fas fa-graduation-cap stroke-transparent"></i>&nbsp;&nbsp;&nbsp;自我评价</p>
                <ul>
                    <li>
                        <p class="tags">具备较强的学习能力和逻辑思维能力，喜欢接触新技术和新知识</p>
                    </li>
                    <li>
                        <p class="tags">具备良好的沟通能力和团队协作能力，能够积极配合团队完成任务</p>
                    </li>
                    <li>
                        <p class="tags">具备一定的创新能力和解决问题能力，能够针对不同需求提出合理方案</p>
                    </li>
                </ul>
                <a href="#">+ Add new</a>
            </div>
        </div>
    </div>
</body>
</html>

ViewRenderService :

public class ViewRenderService

    private readonly IRazorViewEngine _razorViewEngine;
    private readonly ITempDataProvider _tempDataProvider;
    private readonly IServiceProvider _serviceProvider;

    public ViewRenderService(IRazorViewEngine razorViewEngine,
        ITempDataProvider tempDataProvider,
        IServiceProvider serviceProvider)
    
        _razorViewEngine = razorViewEngine;
        _tempDataProvider = tempDataProvider;
        _serviceProvider = serviceProvider;
    

    public async Task<string> RenderToStringAsync(string viewName, object model)
    
        var httpContext = new DefaultHttpContext  RequestServices = _serviceProvider ;
        var actionContext = new ActionContext(httpContext, new RouteData(), new ActionDescriptor());

        using (var sw = new StringWriter())
        
            var viewResult = _razorViewEngine.FindView(actionContext, viewName, false);

            if (viewResult.View == null)
            
                throw new ArgumentNullException($"viewName does not match any available view");
            

            var viewDictionary = new ViewDataDictionary(new EmptyModelMetadataProvider(), new ModelStateDictionary())
            
                Model = model
            ;

            var viewContext = new ViewContext(
                actionContext,
                viewResult.View,
                viewDictionary,
                new TempDataDictionary(actionContext.HttpContext, _tempDataProvider),
                sw,
                new HtmlHelperOptions()
            );

            await viewResult.View.RenderAsync(viewContext);
            return sw.ToString();
        
    

Program.cs :

builder.Services.AddTransient<ViewRenderService>();

以上就是使用Select.HtmlToPdf.NetCore将HTML导出为PDF的全部内容！

作者：百宝门-明维

原文地址：https://blog.baibaomen.com/97-2/