string fileName = Guid.NewGuid().ToString();

            string outputPath = Server.MapPath("output");

            string savepath = string.Format(outputPath + "\\" + fileName + ".pdf");//最终保存

            string url = "http://www.cnblogs.com/ITGirl00/";

            try

            {

                if (!string.IsNullOrEmpty(url) || !string.IsNullOrEmpty(savepath))

                {

                    Process p = new Process();

                    string resource = HttpContext.Current.Server.MapPath("resoure");

                    string dllstr = string.Format(resource + "\\wkhtmltopdf.exe");

                    if (System.IO.File.Exists(dllstr))

                    {

                        p.StartInfo.FileName = dllstr;

                        p.StartInfo.Arguments = " \"" + url + "\"  \"" + savepath + "\"";

                        p.StartInfo.UseShellExecute = false;

                        p.StartInfo.RedirectStandardInput = true;

                        p.StartInfo.RedirectStandardOutput = true;

                        p.StartInfo.RedirectStandardError = true;

                        p.StartInfo.CreateNoWindow = true;

                        p.Start();

                        p.WaitForExit();

                        try

                        {

                            FileStream fs = new FileStream(savepath, FileMode.Open);

                            byte[] file = new byte[fs.Length];

                            fs.Read(file, 0, file.Length);

                            fs.Close();

                            Response.Clear();

                            Response.AddHeader("content-disposition", "attachment; filename=" + fileName + ".pdf");//強制下載

                            Response.ContentType = "application/octet-stream";

                            Response.BinaryWrite(file);

                        }

                        catch (Exception ee)

                        {

                            throw new Exception(ee.ToString());

                        }

                    }

                }

            }

            catch (Exception ex)

            {

                throw new Exception(ex.ToString());

            }