从服务器下载文件的最佳方式是什么 [英] What is the best way to download file from server

问题描述

我有一项有趣的任务，需要我从服务器 (ASP.NET) 将动态生成的文件下载到客户端.在客户端，它只是 JavaScript (jQuery)，客户端能够生成大量参数来自定义数据的导出方式.

I have interesting task which requires me to download a dynamically generated file from a server (ASP.NET) to the client. On the client side it is just JavaScript (jQuery) and the client is able to generate a lot of parameters to customize how the data is exported.

从服务器下载文件的最佳方法是什么?我是否应该使用 WCF 服务，例如此处或者像这个这样的简单页面?

What is the best way to do download the file from the server? Should I use a WCF service such as what is described here or simple page like this one?

我不知道如何在不重新加载页面的情况下下载文件(我不确定 $.ajax 在这种情况下是否有效).有人可以就这个主题给我一些指导吗?谢谢.

I don't know how to download a file without reloading the page (I'm not sure that $.ajax will work in this case). Could someone please give me some direction on this topic? Thanks.

推荐答案

首先你可以从处理程序 .ashx

First you can create the file from a handler .ashx

假设您在 download.ashx 有下载文件，并且您有一些参数要从您的 javascript 传递，例如 download.ashx?p1=8827&p2=8831 以了解您要创建的内容.

Let say that you have the file for downloading at download.ashx and you have some parametres to pass from your javascript, eg download.ashx?p1=8827&p2=8831 to know what you going to create.

然后在您的 javascript 上，您可以简单地将重定向为

Then on your javascript you simple can make a redirect as

window.location = "download.ashx?p1=8827&p2=8831";

或者你可以使用 window.open 来做同样的事情

or alternative you can use the window.open for do the same think

window.open("download.ashx?p1=8827&p2=8831");

您的文件将开始下载.

只要确保你已经设置了附件的标题，并且在你的句柄上设置了正确的内容类型，例如:

Just make sure that you have set the header of attachment, and the correct contenttype on your handle eg:

  HttpContext.Current.Response.ContentType = "application/octet-stream";
  HttpContext.Current.Response.AddHeader("Content-Disposition", 
                    "attachment; filename=" + SaveAsThisFileName);

简单明了，经过测试和工作.

Simple and clear, both tested and working.

您也可能对这个答案感兴趣:如何处理错误.

Also you may interesting on this answer: How to handle errors.

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