Pechkin 是GitHub上的一个开源项目，可方便将html转化成pdf文档，使用也很方便，下面是winform项目中的示例代码：

using System;
using System.Diagnostics;
using System.Drawing.Printing;
using System.IO;
using System.Windows.Forms;
using Pechkin;
using Pechkin.Synchronized;
 
namespace PdfTest
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
 
        private void btnCreatePDF_Click(object sender, EventArgs e)
        {
 
            SynchronizedPechkin sc = new SynchronizedPechkin(new GlobalConfig()
                .SetMargins(new Margins() { Left = 0, Right = 0, Top = 0, Bottom = 0 }) //设置边距
                .SetPaperOrientation(true) //设置纸张方向为横向
                .SetPaperSize(ConvertToHundredthsInch(50), ConvertToHundredthsInch(100))); //设置纸张大小50mm * 100mm
 
            byte[] buf = sc.Convert(new ObjectConfig(), this.txtHtml.Text);
 
            if (buf == null)
            {
                MessageBox.Show("Error converting!");
                return;
            }
 
            try
            {
                string fn = Path.GetTempFileName() + ".pdf";
                FileStream fs = new FileStream(fn, FileMode.Create);
                fs.Write(buf, 0, buf.Length);
                fs.Close();
 
                Process myProcess = new Process();
                myProcess.StartInfo.FileName = fn;
                myProcess.Start();
            }
            catch { }
        }
 
 
        private int ConvertToHundredthsInch(int millimeter)
        {
            return (int)((millimeter * 10.0) / 2.54);
        }
    }
}

web项目中也可以使用:

1.  新建一个待打印的页面，比如index.htm，示例内容如下:

html>

    
        
        
        
        
    
    
        

            导出pdf
        
        

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          

XXXX报表
序号	栏目1	栏目2	栏目3	栏目4
1	数据1	数据2	数据3	数据4
2	数据1	数据2	数据3	数据4
3	数据1	数据2	数据3	数据4
4	数据1	数据2	数据3	数据4
5	数据1	数据2	数据3	数据4
合计：			300.00	300.00

    

 2、创建一个ashx来生成并输出pdf

using System;
using System.Drawing.Printing;
using System.IO;
using System.Web;
using Pechkin;
using Pechkin.Synchronized;
 
namespace PdfWebTest
{
    /// 

    /// Summary description for CreatePdf
    /// 
    public class CreatePdf : IHttpHandler
    {
 
        public void ProcessRequest(HttpContext context)
        {
 
            string htmlFile = context.Request["html"];
 
            if (!string.IsNullOrWhiteSpace(htmlFile))
            {
                string filePath = context.Server.MapPath(htmlFile);
                if (File.Exists(filePath))
                {
                    string html = File.ReadAllText(filePath);
                    SynchronizedPechkin sc = new SynchronizedPechkin(new GlobalConfig()
                                            .SetMargins(new Margins() { Left = 0, Right = 0, Top = 0, Bottom = 0 }) //设置边距
                                            .SetPaperOrientation(true) //设置纸张方向为横向
                                            .SetPaperSize(ConvertToHundredthsInch(50), ConvertToHundredthsInch(100))); //设置纸张大小50mm * 100mm
 
                    byte[] buf = sc.Convert(new ObjectConfig(), html);
 
                    if (buf == null)
                    {
                        context.Response.ContentType = "text/plain";
                        context.Response.Write("Error converting!");
                    }
 
                    try
                    {                       
                        context.Response.Clear();
                         
 
                        //方式1：提示浏览器下载pdf  
                        //context.Response.AddHeader("content-disposition", "attachment;filename=" + htmlFile + ".pdf");
                        //context.Response.ContentType = "application/octet-stream";
                        //context.Response.BinaryWrite(buf);
 
                        //方式2：直接在浏览器打开pdf
                        context.Response.ContentType = "application/pdf";
                        context.Response.OutputStream.Write(buf, 0, buf.Length);
 
                        context.Response.End();
             
                    }
                    catch(Exception e) {
                        context.Response.ContentType = "text/plain";
                        context.Response.Write(e.Message);
                    }
                }
 
            }
 
        }
 
        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
 
 
        private int ConvertToHundredthsInch(int millimeter)
        {
            return (int)((millimeter * 10.0) / 2.54);
        }
    }
}

注意事项：部署web项目时，要保证bin目录下有以下相关dll文件

Common.Logging.dll
libeay32.dll
libgcc_s_dw2-1.dll
mingwm10.dll
Pechkin.dll
Pechkin.Synchronized.dll
ssleay32.dll
wkhtmltox0.dll