生成的文件dowloaded后重定向/显示视图 [英] Redirect / show view after generated file is dowloaded

问题描述

我有一个下载一个动态生成文件的控制器操作：

I've got a controller action that downloads a dynamically generated file:

    public ActionResult DownloadFile()
    {
        var obj = new MyClass { MyString = "Hello", MyBool = true };
        var ser = new XmlSerializer(typeof(MyClass));
        var stream = new MemoryStream();
        ser.Serialize(stream, obj);
        stream.Position = 0;

        Response.Clear();
        Response.AddHeader("Content-Disposition", "attachment; filename=myfile.xml");
        Response.ContentType = "application/xml";

        // Write all my data
        stream.WriteTo(Response.OutputStream);
        Response.End();

        return Content("Downloaded");
    }

仅供参考：

    public class MyClass
    {
        public string MyString { get; set; }
        public int MyInt { get; set; }
    }

这是工作，并且该文件（myfile.xml中）被下载。结果
然而，已下载的消息不发送给浏览器。

This is working, and the file (myfile.xml) is downloaded.
However, the message "Downloaded" is not sent to the browser.

同样，如果我取代返回内容（已下载）; 结果
为返回重定向（www.something.com）; 结果
那么浏览器在文件下载之前重定向。

Similarly, if I replace return Content("Downloaded");
for return Redirect("www.something.com");
then the browser is redirected before the file downloads.

作为一个有点pre-缓行，用户旅程是：

As a bit of a pre-amble, the user journey is:

• 用户填写的previous视图形式


• 表单提交


• 生成XML和下载


• 用户被重定向/已下载视图显示的（所以按F5不会重新发布该表格）的

• User fills out form on previous view
• Form is submitted
• XML is generated and downloaded
• User is redirected / "Downloaded" view is shown (so hitting F5 won't re-post the form)

推荐答案

每个HTTP请求只能有一个反应 - 你想在两到潜行（文件和网页）

Each HTTP request can only have one response - you're trying to sneak in two (the file, and a page).

通常，当你发送一个内容处置：附件。HTTP头，浏览器将停留在当前页面上弹出一个文件保存对话框（或自动保存在您的下载文件）

Normally when you send a "Content-Disposition: attachment" HTTP header the browser will stay on the current page and pop a file save dialog (or automatically save the file in your downloads).

您将不得不如果你想prevent重新提交表单来改变你的策略。我建议有点JavaScript来禁用该表单的提交按钮，显示一个div覆盖已完成的消息？

You're going to have to change your strategy if you want to prevent re-submission of the form. I'd suggest a bit of javascript to disable the form's submit button and show the "Completed" message in a div overlay?

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