抓取网页，生成PDF

抓取网页源码，只获得html文本，所以只适用于同一站点

public static string GetResponse(string url, string method, byte[] postData)
    {
        try
        {
            Uri uri = new Uri(url);
            WebRequest req = HttpWebRequest.Create(uri);
            req.ContentType = "application/x-www-form-urlencoded";
            req.Method = method;
            if (method.ToUpper() == "POST" && postData != null)
            {
                Stream postStream = req.GetRequestStream();
                postStream.Write(postData, 0, postData.Length);
                postStream.Close();
            }
            WebResponse res = req.GetResponse();

            string coder = ((HttpWebResponse)res).CharacterSet;

            System.Text.Encoding resEncoding = System.Text.Encoding.GetEncoding(coder);
            StreamReader reader = new StreamReader(res.GetResponseStream(), System.Text.Encoding.UTF8);

            string html = reader.ReadToEnd();

            reader.Close();
            res.Close();

            return html;
        }
        catch(Exception ex)
        {
            return ex.Message;
        }
    }

 

使用ABCpdf生成pdf

public static void SaveAsFile(string htmlContext, string pdfSavePath)
        {
            using (Doc pdfDoc = new Doc())
            {
                pdfDoc.Font = pdfDoc.AddFont("宋体","ChineseS");
                string tempFile = System.Web.HttpContext.Current.Server.MapPath("~/") + "temp." + DateTime.Now.Millisecond.ToString() + "." + DateTime.Now.ToString("MM-dd-yyyy-hh") + ".html";
                System.IO.StreamWriter strWriter = new System.IO.StreamWriter(tempFile,false,System.Text.Encoding.UTF8);
                strWriter.Write(htmlContext);
                strWriter.Close();
                strWriter = null;
                int pdfId = 0;
                pdfDoc.Rect.String = "30 50 1470 840";
                pdfDoc.Color.String = "192,48,117";

                try
                {
                    pdfId = pdfDoc.AddImageUrl("file:///" + tempFile);
                    while (pdfDoc.Chainable(pdfId))
                    {
                        pdfDoc.SetInfo(pdfDoc.Page, "/MediaBox:Rect", "0 0 1500 900");
                        pdfDoc.Page = pdfDoc.AddPage();
                        pdfId = pdfDoc.AddImageToChain(pdfId);
                    }
                    for (int i = 0; i < pdfDoc.PageCount - 1; i++)
                    {
                        pdfDoc.PageNumber = i;
                        pdfDoc.Flatten();
                    }
                    pdfDoc.Encryption.CanChange = false;
                    pdfDoc.Encryption.CanEdit = false;
                    pdfDoc.Encryption.CanPrint = true;
                    pdfDoc.Encryption.CanPrintHi = true;
                    pdfDoc.Encryption.CanAssemble = false;
                    pdfDoc.Encryption.CanCopy = false;
                    pdfDoc.Save(pdfSavePath);
                }
                catch (Exception ex)
                {

                    throw ex;
                }
                finally
                {
                    System.IO.File.Delete(tempFile);
                    pdfDoc.Delete(pdfId);
                    pdfDoc.Clear();
                }

            }
        }

 

 

    protected void Button1_Click(object sender, EventArgs e)
    {
        string strHTML = WebRequestHelper.GetResponse("http://localhost:2275/ABCpdf.Net/test.aspx", "GET", null);
        Tools.PdfHelper.SaveAsFile(strHTML, Server.MapPath("2.pdf"));        
    }