ASP.NET MVC导出PDF

主要步骤：

  1、传递需要打印的html内容

  2、后台将html内容转换成PDF内容

  3、转换后生成文件流下载

使用解析组件：iTextSharp

程序包管理控制器执行安装命令,也可以直接Nuget包管理器安装。

   Install-Package iTextSharp

   Install-Package itextsharp.xmlworker

页面：

通过form表单提交吧当前页面的html提交到后台，进入页面，获取指定区域内容，当然你也可以使用其他方式，这里我做个示例：

后台接收：

    public FileResult BaishiMianDan(string pdfData = "")
    {
        pdfData = pdfData.Replace("<", "<").Replace(">", ">").Replace("\r\n", "");
        #region 针对IE浏览器js获取的html内容会丢失"的问题，添加转义字符\"
        //if (pdfData.IndexOf("color=red") > 0)
        //{
        //    pdfData = pdfData.Replace("color=red", "color=\"red\"");
        //}
        //if (pdfData.IndexOf("color=#000") > 0)
        //{
        //    pdfData = pdfData.Replace("color=#000", "color=\"#000\"");
        //} 
        #endregion
        byte[] pdf = this.ConvertHtmlTextToPDF(pdfData);
        return File(pdf, "application/pdf", "test.pdf");
    }

    /// 

    /// 将Html文字 输出到PDF档里
    /// 
    /// 
    /// 
    public byte[] ConvertHtmlTextToPDF(string htmlText)
    {
        if (string.IsNullOrEmpty(htmlText))
        {
            return null;
        }
        MemoryStream outputStream = new MemoryStream();//要把PDF写到哪个串流
        byte[] data = Encoding.UTF8.GetBytes(htmlText);//字串转成byte[]
        MemoryStream msInput = new MemoryStream(data);
        Document doc = new Document();
        doc.SetMargins(0, 0, 0, 0);     //设置内容边距
        PdfWriter writer = PdfWriter.GetInstance(doc, outputStream);
        //指定文件预设开档时的缩放为100%
        PdfDestination pdfDest = new PdfDestination(PdfDestination.XYZ, 0, doc.PageSize.Height, 1f);
        //开启Document文件 
        doc.Open();
        #region pdf文件添加LOGO
        string logoPath = Server.MapPath("/Assets/images/tuanzi.jpg");
        Image logo = Image.GetInstance(logoPath);
        float scalePercent = 10f;       //图片缩放比例
        float percentX = 60f;
        float percentY = 250f;
        logo.ScalePercent(scalePercent);
        logo.SetAbsolutePosition(percentX, doc.PageSize.Height - percentY);
        doc.Add(logo);
        #endregion
        //使用XMLWorkerHelper把Html parse到PDF档里
        XMLWorkerHelper.GetInstance().ParseXHtml(writer, doc, msInput, null, Encoding.UTF8, new UnicodeFontFactory());
        //将pdfDest设定的资料写到PDF档
        PdfAction action = PdfAction.GotoLocalPage(1, pdfDest, writer);
        writer.SetOpenAction(action);
        doc.Close();
        msInput.Close();
        outputStream.Close();
        //回传PDF档案 
        return outputStream.ToArray();
    }

    public class UnicodeFontFactory : FontFactoryImp
    {
        private static readonly string arialFontPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Fonts),
            "arialuni.ttf");//arial unicode MS是完整的unicode字型。
        private static readonly string kaiuPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Fonts),
            "KAIU.TTF");//标楷体
        private static readonly string simsunPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Fonts),
            "simsun.ttc,1");//新宋体
        private static readonly string msyhPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Fonts),
            "msyh.ttf");//微软雅黑

        public override Font GetFont(string fontname, string encoding, bool embedded, float size, int style, BaseColor color,
            bool cached)
        {
            //采用微软雅黑
            BaseFont baseFont = BaseFont.CreateFont(msyhPath, BaseFont.IDENTITY_H, BaseFont.EMBEDDED);
            return new Font(baseFont, size, style, color);
        }
    }

导出效果：