blocks|key|776651|text|让最初的“开始报告生成”web服务调用在某个任务池中创建一个任务，并将该任务的ID返回给调用者。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|776652|然后，提供另一个方法，返回给定taskId的“完成百分比”。|776653|提供第三个方法，返回已完成任务的实际结果。|776654|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

Have the initial "start report generation" web service call create a task in some task pool, and return the caller the ID of the task. 

Then, provide another method that returns the "percent done" for a given taskId. 

Provide a third method that returns the actual result for a completed task.

blocks|key|5302777|text|最简单的方法是让Web服务用调用的进度更新数据库中的一个字段，然后创建一个查询该字段并返回值的Web服务。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5302778|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Easiest way would be to have the Web Service update a field on a database with the progress of the call, and then create a Web Service that queries that field and returns the value.

blocks|key|3047145|text|在服务器上编写一个单独的方法，您可以通过传递已调度的作业的ID来查询该方法，该方法返回一个介于0-100+(或0.0和1.0，或其他值)之间的近似值。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3047146|例如，在REST样式中，您可以向http://yourserver.com/app/jobstatus/4133/发出GET请求，该请求将返回一个简单的'52‘作为text/plain。然后你只需要每(秒)查询一次两秒钟？10秒？)看看它能走多远。|offset|length|style|CODE|3047147|如何在后端实际完成监控在很大程度上取决于您的进程是什么以及它是如何工作的。|3047148|entityMap^0|0|G|15|2A|A|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@$D|N|E|O|F|G]|$D|P|E|Q|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|R|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|K|$]]

Write a separate method on the server that you can query by passing the ID of the job that has been scheduled and which returns an approximate value between 0-100 (or 0.0 and 1.0, or whatever) of how far along it is.

E.g. in REST-style, you could make a GET request to <code>http://yourserver.com/app/jobstatus/4133/</code> which would return a simple '52' as <code>text/plain</code>. Then you just have to query that every (second? two seconds? ten seconds?) to see how far along it is.

How you actually accomplish the monitoring on the backend hugely depends on what your process is and how it works.

blocks|key|3047191|text|让web服务返回某种类型的任务ID或会话ID，让另一个web方法使用该ID进行查询，这将返回所需的信息(完成百分比、文件列表等)。每隔一段时间从客户端轮询此方法。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3047192|使用数据库存储进程信息，如果您在web服务的内存中执行此操作，则在Web场环境中将不能很好地扩展，因为任务可能在另一台服务器上运行，而不是您正在轮询的服务器。|3047193|编辑:我刚刚看到了另一个类似的答案，并对其进行了评论。评论者是对的-您可以使用内存中的表来避免磁盘操作，但仍然使用单独的db服务器。|3047194|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

Make the web service to return some sort of task ID or session ID. Make another web method to query with that ID, which returns the information needed (% completion, list of files, whatever). Poll this method at some interval from the client.

Use a database to store the process information, if you do this in memory of the web service, this will not scale well in web farm environment, as it may happen that the task runs on another server, than the one you are polling.

EDIT: I just saw another similar answer, and comment to it. The commenter is right - you can use in-memory table to avoid disk operations, but still using a separate db server.

blocks|key|3892188|text|我认为XML服务很慢，所以创建多个方法和轮询的过程将是极其缓慢的，并且会在服务器上产生巨大的负载。我不会在生产环境中这样做。我在数据库轮询中也看到了同样(但更小)的问题。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|3892189|请尝试使用SOAP+extensions。它实现了一个事件驱动的模型。参见Adding+a+Progress+Bar+to+Your+Web+Service+Client+Application+on+MSDN。|3892190|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/aa480520.aspx^0|K|2|R|5|0|5|F|11|1W|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@$9|Q|A|R|B|C]|$9|S|A|T|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@$9|X|A|Y|1|Z]]|E|$]]|$1|H|3|-4|5|6|7|10|8|@]|D|@]|E|$]]]|I|$J|$5|K|L|M|E|$N|O]]]]

I think XML web service is slow, so creating multiple methods and polling the progress will be extremely slow and will generate huge load on the server. I wouldn't do it in production environment. I see the same (but smaller) problems with database polling.

Try SOAP extensions instead. It implements an event-driven model. See <a href="http://msdn.microsoft.com/en-us/library/aa480520.aspx" rel="nofollow noreferrer">Adding a Progress Bar to Your Web Service Client Application on MSDN</a>.

blocks|key|779610|text|您还可以使用use+SoapExtensions通知您的客户端下载/处理进度。然后，服务器可以向客户端发送事件。如果您不使用客户端，则不需要更改客户端中的任何内容。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|779611|在你的客户端中允许类似这样的东西：|779612|//...
private+localhost.MyWebServiceService+_myWebService+=+new+localhost.MyWebServiceService+();
_myWebService.processDelegate+%2B=+ProgressUpdate;
_myWebService.CallHeavyMethod();
//...

private+void+ProgressUpdate(object+sender,+ProgressEventArgs+e)
{
++double+progress+=+((double)e.ProcessedSize+/+(double)e.TotalSize)+*+100.00;
++//Show+Progress...
}|code-block|syntax|javascript|779613|entityMap|0|LINK|mutability|MUTABLE|url|http://www.codeproject.com/KB/webservices/Soap_Extension_Progress.aspx^0|6|I|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@$A|T|B|U|1|V]]|C|$]]|$1|D|3|E|5|6|7|W|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|X|8|@]|9|@]|C|$I|J]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|C|$]]]|L|$M|$5|N|O|P|C|$Q|R]]]]

You can also <a href="http://www.codeproject.com/KB/webservices/Soap_Extension_Progress.aspx" rel="nofollow noreferrer">use SoapExtensions</a> to notify your client of the download/process progress. The server can then send events to the client. Nothing in the client has to be changed if you don't use it.

Allows for something like this in your client:

<pre><code>//...
private localhost.MyWebServiceService _myWebService = new localhost.MyWebServiceService ();
_myWebService.processDelegate += ProgressUpdate;
_myWebService.CallHeavyMethod();
//...

private void ProgressUpdate(object sender, ProgressEventArgs e)
{
 double progress = ((double)e.ProcessedSize / (double)e.TotalSize) * 100.00;
 //Show Progress...
}
</code></pre>

I have an ASP.NET web service which does some heavy lifting, like say,some file operations, or generating Excel Sheets from a bunch of crystal reports. I don't want to be blocked by calling this web service, so i want to make the web service call asynchronous. Also, I want to call this web service from a web page, and want some mechanism which will allow me to keep polling the server so that i can i can show some indicator of progress on the screen, like say, the number of files that have been processed. Please note that i do not want a notification on completion of the web method call, rather, i want a live progress status. How do i go about it?

How do you measure the progress of a web service call?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我有一个Excel服务，它可以做一些繁重的工作，比如一些文件操作，或者从一堆水晶报表中生成ASP.NET工作表。我不想因为调用这个web服务而被阻塞，所以我想让web服务调用异步。另外，我想从网页调用此web服务，并想要一些机制，使我可以不断轮询服务器，以便我可以在屏幕上显示一些进度指示器，例如，已经处理的文件数。请注...

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