wkhtmltopdf 生成pdf

    public class PdfHelper
     {

         static string RootPath
         {
             get
             {
                 string AppPath = "";
                 HttpContext HttpCurrent = HttpContext.Current;
                 if (HttpCurrent != null)
                 {
                     AppPath = HttpCurrent.Server.MapPath("~");
                 }

                 return AppPath.Trim(new char[]{'\\'});
             }
         }

         public static void GetPdf(HttpResponseBase response,string pdfUrl)
         {
             string fileName = Guid.NewGuid().ToString("N") + ".pdf";
             string filePath = RootPath + "\\pdfs\\" + fileName;
             string exePath=RootPath + "\\wkhtmltopdf\\wkhtmltopdf.exe";
             string args=pdfUrl + " --zoom 1.25 \"" + filePath+"\"";

             Process p =new Process();
             p.StartInfo.FileName = exePath;
             p.StartInfo.Arguments = args;
             p.StartInfo.UseShellExecute = false;
             p.StartInfo.RedirectStandardInput = true;
             p.StartInfo.RedirectStandardOutput = true;
             p.StartInfo.RedirectStandardError = true;
             p.StartInfo.CreateNoWindow = false;

             try
             {
                 p.Start();
                 p.WaitForExit();
                 p.StandardOutput.ReadToEnd();
                 p.Close();

                 FileStream fs = new FileStream(filePath, FileMode.Open);
                 byte[] file = new byte[fs.Length];
                 fs.Read(file, , file.Length);
                 fs.Close();

                 response.Clear();
                 response.AddHeader("content-disposition", "attachment; filename=" + fileName);
                 response.ContentType = "application/octet-stream";
                 response.BinaryWrite(file);
                 response.Flush();

             }
             catch
             {

             }

         }
     }

对于要打印成pdf的html要求:

1. dom元素的 height/width/margin/padding以及定位,尽量使用百分比的形式。

2. 图片的像素质量尽量高一些，因为生成pdf的过程会有缩放。另外加入html的时候设置显示的高度跟宽度。

3. 对于pdf的分页，可以直接使用一些属性来实现：

<header page-break-before="always"></header>

{page-break-before:always;}//添加到header的dom元素实现换页

<footer page-break-after="always"></footer>                                  
         {page-break-after:always;}  //添加到footer的dom元素实现换页

{page-break-inside:avoid;}