C#背景工人阶级 [英] c# Background worker class

问题描述

我想将此方法放入后台工作人员类，我正在尝试但被卡住了， 有谁能帮助我如何将这种方法运行到后台工作程序类中:
我将这种方法调用到我的asp.net页面中，该页面在服务器上压缩文件，然后还原到客户端.但压缩文件可能需要更长的时间，并且用户会看到繁忙的屏幕，因此请避免使用后台工作人员类:

I want to put this method into background worker class, i am trying but stuck, can any one help me how to run this method into background worker class:
I am calling this method into my asp.net page, where file are zipped on server and then returend to the client. but zipping of file may take longer and user will see a busy screen, so to avoid that i want to use background worker class:

[Ajax.AjaxMethod(Ajax.HttpSessionStateRequirement.ReadWrite)]
public string Zip(string f, bool original)
{
    string zip = "";
    try
    {
        files = HttpContext.Current.Server.UrlDecode(files);
        string[] fileCollection = files.Split('*');
        zipFile = class1.zipfile(fileCollection, IsOriginal);

        int fileLength = files.Length;
    }
    catch (Exception ex)
    {
        Console.WriteLine("Exception during processing {0}", ex);
   }
    return File;
}

推荐答案

似乎您的问题是从BackgroundWorker返回值.可以这样完成:

It seems your problem is returning the value from the BackgroundWorker. That can be done like this:

在工作人员的DoWork方法中，将e.Result设置为要返回的内容:

In the worker's DoWork method, set the e.Result to what you want to return:

private void backgroundWorker_DoWork(object sender, DoWorkEventArgs e)
{   
    ...
    e.Result = File;
}

然后，在RunWorkerCompleted方法中，您可以在主线程中访问此值:

Then, in the RunWorkerCompleted method, you can access this value in the main thread:

private void backgroundWorker1_RunWorkerCompleted( object sender, RunWorkerCompletedEventArgs e)
{
    string result = e.Result as string;
}

我假设File在这里是字符串，但是您可以将其强制转换为所需的对象.

I have assumed that File is string here, but you can cast it to your required object.

为什么在Web应用程序中需要它，我一无所知，但这至少是怎么做;)

Why you need it in a web application I have no clue, but this is how to do it at least ;)

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