通过响应流发送给浏览器的文件后，不阻止（jQuery的BlockUI）

本文介绍了通过响应流发送给浏览器的文件后，不阻止（jQuery的BlockUI）的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我有一个＆LT; ASP：按钮/＆GT; 生成PDF格式的报告。我想使用jQuery BlockUI显示一条消息，上面写着：生成报告。

I have an <asp:button /> that generates a PDF report. I want to use jQuery BlockUI to display a message that says: Generating Report..

使用： Response.BinaryWrite 我然后将文件发送给用户，以便它显示为在浏览器中的文件下载

Using: Response.BinaryWrite I am then sending the file to the user so it appears as a file download in the browser.

我不能让 $ unblockUI（）; 火。一旦文件下载开始或已完成或取消，我希望它dissappear。目前，它从来不会..它好像页面没有被重新加载，我已经打了服务器，但它与同一页回来。

I cannot get $.unblockUI(); to fire. As soon as the file download begins or has completed or is cancelled I want it to dissappear. Currently it never does.. It's as though the page hasn't been re-loaded, I've hit the server but it comes back with the same page.

东西我曾尝试：

• 在JS的变量设置为true，因此在的document.ready（）它会调用一个函数，如果设置为true。这不起作用，因为即使我改变变量code它不会更改发送到客户端的HTML。
• 这样的事情： Sys.WebForms.PageRequestManager.getInstance（）add_pageLoaded（函数（）{$ .unblockUI;}）; //与微软的方式登记（文档）$ .ajaxStop（$ unblockUI）; //双保险，使用jQuery的方式注册不会被调用。

• Setting a variable in JS to true so on document.ready() it will call a function if set to true. This doesn't work because even though I change the variable in code it doesn't change the HTML that is sent to the client.
• This sort of thing: Sys.WebForms.PageRequestManager.getInstance().add_pageLoaded(function() { $.unblockUI; }); //register with Microsoft way $(document).ajaxStop($.unblockUI); //double the insurance and register with jquery way never gets called..

这能与一个UpdatePanel实现？

Can this be achieved with an updatepanel?

有什么想法？

此外，在情况下，它可以帮助

Also in case it helps:

Response.AddHeader("Content-Disposition", "attachment;filename=""" & ShortFilename & """") Response.AddHeader("Content-Length", byteArray.Length) Response.BinaryWrite(byteArray) Response.Flush() Response.End()

我明白为什么这不工作排序，页面不刷新，无论如何也只是被发送到浏览器的响应流，但肯定有一个事件，我可以锁存到？

I can see why this doesn't work sort of, the page is not refreshing in anyway there's just a response stream being sent to the browser, but surely there's an event I can latch on to?

推荐答案

的解决方案是第一阻塞UI为正常。然后，让一个AJAX请求到报表生成器，当PDF是很短的时间产生它在本地存储，或者当用户注销或他们的登录超时有它在被清除出临时文件夹。有报告生成器返回成功消息和网址。

The solution is to first block the UI as normal. Then make an AJAX request to your report generator, when the PDF is generated store it locally for a short time, or have it in a temporary folder that is cleared out when the user logs out or their login times out. Have the report generator return a success message and a URL.

在客户端Ajax请求处理成功的消息，删除BlockUI，然后使用调用的网址：

Have the client ajax request handle the success message, remove BlockUI, then call the URL using:

window.location="yourURL/temp/report.pdf

浏览器将开始下载文件和你做！

The browser will start to download the file and you are done!

stackoverflow/a/7660817/181197