详解如何使用Net将HTML简历导出为PDF格式

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 = "pengyuyan@outlook.com" };
    //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;
}

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);
    }
}

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;
    }
}

@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" alt="profile-image">
                <a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ><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="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ><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="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ><i class="fas fa-pen-alt blue"></i>  </a>
            <hr width="100%">
            <div id="about">
                <p style="display:inline;">个人详情</p>
                <a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ><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>+91-532-25453441</strong></p>
        </div>
        <div id="info-cards">
            <div class="card">
                <p><i class="fas fa-briefcase stroke-transparent"></i>   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>   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>   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="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >+ add new</a>
            </div>
        </div>
    </div>
</body>
</html>

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();
        }
    }
}

builder.services.addtransient<viewrenderservice>();