jquery 能执行下载吗

Question

            
          $.post("action/PDF.ashx",{url:url},function(result){
                // alert(result);
                 window.location.href = "PDF/" + result;
                 
                 hideBlock();
            });   window.location.href = "PDF/" + result; 执行到这里他就直接在网页中打开pdf，我想让他执行到这里然后显示下载或另存为，能实现吗，请高手指教
jQueryjsasp.net。net

Answer 1

PDF.ashx文件需要以流输出才可以。
Response.Clear();
Response.Buffer = true;
Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(Server.MapPath("~/PDF.asax"),System.Text.Encoding.UTF8));
Response.WriteFile(Server.MapPath("~/PDF.asax"));
Response.Flush();
Response.Close();

Answer 2

jquery 里面怎么写啊。高手、、

Answer 3

    public void ProcessRequest (HttpContext context) {
        context.Response.ContentType = "text/plain";
       // context.Response.Write("Hello World");
        string url = context.Request["url"];
        string be = url.Substring(url.LastIndexOf("/") + 1);
        string str = be.Substring(0, be.IndexOf("."));
        if (url != null)
        {
            string path1 = System.Web.HttpContext.Current.Server.MapPath("~/PDF/" + str + ".pdf");
            HtmlToPdf(url, path1);
        }
       // GC.Collect();
        context.Response.Write(str + ".pdf");
       // downloadfile(str + ".pdf");
    }ashx里面要返回数据到jquery里面判断然后才去执行下载

Answer 4

你post到ProcessRequest 方法，判断，不满足条件返回信息到页面，如果满足就直接
Response.Clear();
Response.Buffer = true;
Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(Server.MapPath("~/PDF.asax"),System.Text.Encoding.UTF8));
Response.WriteFile(Server.MapPath("~/PDF.asax"));
Response.Flush();
Response.Close();

Answer 5

<%@ WebHandler Language="C#" Class="Pdf" %>using System;
using System.Web;
using System.Diagnostics;public class Pdf : IHttpHandler {
    
    public void ProcessRequest (HttpContext context) {
        context.Response.ContentType = "text/plain";
        string url = context.Request["url"].ToString();
        string be = url.Substring(url.LastIndexOf("/") + 1);
        string str = be.Substring(0, be.IndexOf("."));
        if (url != null)
        {
            string path1 = System.Web.HttpContext.Current.Server.MapPath("~/PDF/" + str + ".pdf");
            HtmlToPdf(url, path1);
        }
        downloadfile(str + ".pdf");
        //context.Response.Write(str + ".pdf");
    }    public static bool HtmlToPdf(string url, string path)
    {
        try
        {
            if (string.IsNullOrEmpty(url) || string.IsNullOrEmpty(path))
                return false;
            Process p = new Process();
            string str = System.Web.HttpContext.Current.Server.MapPath("~/wkhtmltopdf.exe");
            if (!System.IO.File.Exists(str))
                return false;
            p.StartInfo.FileName = str;
            p.StartInfo.Arguments = " \"" + url + "\" " + path;
            p.StartInfo.UseShellExecute = false;
            p.StartInfo.RedirectStandardInput = true;
            p.StartInfo.RedirectStandardOutput = true;
            p.StartInfo.RedirectStandardError = true;
            p.StartInfo.CreateNoWindow = true;
            p.Start();
            System.Threading.Thread.Sleep(800);
            p.WaitForExit();
            return true;
        }
        catch (Exception ex)
        {
            HttpContext.Current.Response.Write(ex);
        }
        return false;
    }    public void downloadfile(string s_fileName)
    {        HttpContext.Current.Response.ContentType = "application/ms-download";
        string s_path = System.Web.HttpContext.Current.Server.MapPath("~/PDF/") + s_fileName;
        System.IO.FileInfo file = new System.IO.FileInfo(s_path);
        HttpContext.Current.Response.Clear();
        HttpContext.Current.Response.AddHeader("Content-Type", "application/octet-stream");
        HttpContext.Current.Response.Charset = "utf-8";
        HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment;filename=" + System.Web.HttpUtility.UrlEncode(file.Name, System.Text.Encoding.UTF8));
        HttpContext.Current.Response.AddHeader("Content-Length", file.Length.ToString());        //Response.WriteFile("");        HttpContext.Current.Response.WriteFile(file.FullName);        HttpContext.Current.Response.Flush();
        HttpContext.Current.Response.Clear();
        HttpContext.Current.Response.End();
    }
    
    public bool IsReusable {
        get {
            return false;
        }
    }}
                        <script>
                        //window.location.href
                         $(function(){
                          $(".btnPdf").click(function(){
                          
                          var url=window.location.href;
                            //location.href = "action/PDF.ashx?url="+window.location.href;
                            $.post("action/PDF.ashx",{url:url});
                          });
                         });
                        </script>这个为什么不执行下载啊。。

Answer 6

你这样的代码有意义没?下载是不需要用ajax的,除非需要特殊处理的时候
文件流输出
            DownAdress = dimm + DownAdress;
            if (!File.Exists(Server.MapPath(DownAdress)))
            {
                Response.Write("下载的文件不存在!");
                Response.End();
                return;
            }
            using (FileStream fso = new FileStream(Server.MapPath(DownAdress), FileMode.Open,FileAccess.ReadWrite,FileShare.Inheritable))
            {
                string[] filename=DownAdress.Split(new char[]{'/'});
                int len = Convert.ToInt32(fso.Length);
                byte[] FileObj = new byte[len];
                fso.Read(FileObj, 0, len);
                Response.AddHeader("Content-Disposition", string.Format("attachment; filename={0}", HttpUtility.UrlEncode(filename[filename.Length - 1]), System.Text.Encoding.UTF8));
                Response.AddHeader("Content-Length", len.ToString());
                Response.ContentType = "application/octet-stream";
                Response.Charset = "UTF-8";
                Response.ContentEncoding = System.Text.Encoding.UTF8; 
                Response.BinaryWrite(FileObj);
                Response.Flush();
                Response.Clear();
                fso.Close();
            }