blocks|key|733750|text|我发现这个(WPF+Multithreading:+Using+the+BackgroundWorker+and+Reporting+the+Progress+to+the+UI.+link)包含了@Andrew答案中缺失的其余细节。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|733751|我发现有一件事非常有用，那就是工作线程不能访问MainWindow的控件(在它自己的方法中)，但是当在主窗口事件处理程序中使用委托时，这是可能的。|733752|worker.RunWorkerCompleted+%2B=+delegate(object+s,+RunWorkerCompletedEventArgs+args)
{
++++pd.Close();
++++//+Get+a+result+from+the+asynchronous+worker
++++T+t+=+(t)args.Result
++++this.ExampleControl.Text+=+t.BlaBla;
};|code-block|syntax|javascript|733753|entityMap|0|LINK|mutability|MUTABLE|url|http://elegantcode.com/2009/07/03/wpf-multithreading-using-the-backgroundworker-and-reporting-the-progress-to-the-ui/^0|6|2H|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]]]]

I found this (<a href="http://elegantcode.com/2009/07/03/wpf-multithreading-using-the-backgroundworker-and-reporting-the-progress-to-the-ui/" rel="nofollow">WPF Multithreading: Using the BackgroundWorker and Reporting the Progress to the UI. link</a>) to contain the rest of the details which are missing from @Andrew's answer.

The one thing I found very useful was that the worker thread couldn't access the MainWindow's controls (in it's own method), however when using a delegate inside the main windows event handler it was possible.

<pre><code>worker.RunWorkerCompleted += delegate(object s, RunWorkerCompletedEventArgs args)
{
 pd.Close();
 // Get a result from the asynchronous worker
 T t = (t)args.Result
 this.ExampleControl.Text = t.BlaBla;
};
</code></pre>

blocks|key|949833|text|您可能还想研究一下使用Task而不是后台工作者。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|949834|最简单的方法是在您的示例中使用Task.Run(InitializationThread);。|949835|使用任务而不是后台工作者有几个好处。例如，.net+4.5中的新异步/等待功能使用Task进行线程处理。以下是有关Task+https://docs.microsoft.com/en-us/dotnet/api/system.threading.tasks.task的一些文档|949836|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.microsoft.com/en-us/dotnet/api/system.threading.tasks.task^0|B|4|0|F|V|0|15|4|1L|4|1Q|1Z|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@$9|S|A|T|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|X|8|@$9|Y|A|Z|B|C]|$9|10|A|11|B|C]]|D|@$9|12|A|13|1|14]]|E|$]]|$1|J|3|-4|5|6|7|15|8|@]|D|@]|E|$]]]|K|$L|$5|M|N|O|E|$P|Q]]]]

You may want to also look into using <code>Task</code> instead of background workers. 

The easiest way to do this is in your example is <code>Task.Run(InitializationThread);</code>. 

There are several benefits to using tasks instead of background workers. For example, the new async/await features in .net 4.5 use <code>Task</code> for threading. Here is some documentation about <code>Task</code>
<a href="https://docs.microsoft.com/en-us/dotnet/api/system.threading.tasks.task" rel="nofollow noreferrer">https://docs.microsoft.com/en-us/dotnet/api/system.threading.tasks.task</a>

blocks|key|733820|text|using+System;++
using+System.ComponentModel;+++
using+System.Threading;++++
namespace+BackGroundWorkerExample++
{+++
++++class+Program++
++++{++
++++++++private+static+BackgroundWorker+backgroundWorker;++

++++++++static+void+Main(string[]+args)++
++++++++{++
++++++++++++backgroundWorker+=+new+BackgroundWorker++
++++++++++++{++
++++++++++++++++WorkerReportsProgress+=+true,++
++++++++++++++++WorkerSupportsCancellation+=+true++
++++++++++++};++

++++++++++++backgroundWorker.DoWork+%2B=+backgroundWorker_DoWork;++
++++++++++++//For+the+display+of+operation+progress+to+UI.++++
++++++++++++backgroundWorker.ProgressChanged+%2B=+backgroundWorker_ProgressChanged;++
++++++++++++//After+the+completation+of+operation.++++
++++++++++++backgroundWorker.RunWorkerCompleted+%2B=+backgroundWorker_RunWorkerCompleted;++
++++++++++++backgroundWorker.RunWorkerAsync("Press+Enter+in+the+next+5+seconds+to+Cancel+operation:");++

++++++++++++Console.ReadLine();++

++++++++++++if+(backgroundWorker.IsBusy)++
++++++++++++{+
++++++++++++++++backgroundWorker.CancelAsync();++
++++++++++++++++Console.ReadLine();++
++++++++++++}++
++++++++}++

++++++++static+void+backgroundWorker_DoWork(object+sender,+DoWorkEventArgs+e)++
++++++++{++
++++++++++++for+(int+i+=+0;+i+<+200;+i%2B%2B)++
++++++++++++{++
++++++++++++++++if+(backgroundWorker.CancellationPending)++
++++++++++++++++{++
++++++++++++++++++++e.Cancel+=+true;++
++++++++++++++++++++return;++
++++++++++++++++}++

++++++++++++++++backgroundWorker.ReportProgress(i);++
++++++++++++++++Thread.Sleep(1000);++
++++++++++++++++e.Result+=+1000;++
++++++++++++}++
++++++++}++

++++++++static+void+backgroundWorker_ProgressChanged(object+sender,+ProgressChangedEventArgs+e)++
++++++++{++
++++++++++++Console.WriteLine("Completed"+%2B+e.ProgressPercentage+%2B+"%25");++
++++++++}++

++++++++static+void+backgroundWorker_RunWorkerCompleted(object+sender,+RunWorkerCompletedEventArgs+e)++
++++++++{++

++++++++++++if+(e.Cancelled)++
++++++++++++{++
++++++++++++++++Console.WriteLine("Operation+Cancelled");++
++++++++++++}++
++++++++++++else+if+(e.Error+!=+null)++
++++++++++++{++
++++++++++++++++Console.WriteLine("Error+in+Process+:"+%2B+e.Error);++
++++++++++++}++
++++++++++++else++
++++++++++++{++
++++++++++++++++Console.WriteLine("Operation+Completed+:"+%2B+e.Result);++
++++++++++++}++
++++++++}++
++++}++
}+|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|733821|此外，请参考以下链接，您将了解Background的概念|unstyled|offset|length|style|CODE|733822|http://www.c-sharpcorner.com/UploadFile/1c8574/threads-in-wpf/|733823|entityMap|0|LINK|mutability|MUTABLE|url^0|0|F|A|0|0|1Q|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|U|8|@$G|V|H|W|I|J]]|9|@]|A|$]]|$1|K|3|L|5|F|7|X|8|@]|9|@$G|Y|H|Z|1|10]]|A|$]]|$1|M|3|-4|5|F|7|11|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|L]]]]

<pre><code>using System; 
using System.ComponentModel; 
using System.Threading; 
namespace BackGroundWorkerExample 
{ 
 class Program 
 { 
 private static BackgroundWorker backgroundWorker; 

 static void Main(string[] args) 
 { 
 backgroundWorker = new BackgroundWorker 
 { 
 WorkerReportsProgress = true, 
 WorkerSupportsCancellation = true 
 }; 

 backgroundWorker.DoWork += backgroundWorker_DoWork; 
 //For the display of operation progress to UI. 
 backgroundWorker.ProgressChanged += backgroundWorker_ProgressChanged; 
 //After the completation of operation. 
 backgroundWorker.RunWorkerCompleted += backgroundWorker_RunWorkerCompleted; 
 backgroundWorker.RunWorkerAsync("Press Enter in the next 5 seconds to Cancel operation:"); 

 Console.ReadLine(); 

 if (backgroundWorker.IsBusy) 
 { 
 backgroundWorker.CancelAsync(); 
 Console.ReadLine(); 
 } 
 } 

 static void backgroundWorker_DoWork(object sender, DoWorkEventArgs e) 
 { 
 for (int i = 0; i &lt; 200; i++) 
 { 
 if (backgroundWorker.CancellationPending) 
 { 
 e.Cancel = true; 
 return; 
 } 

 backgroundWorker.ReportProgress(i); 
 Thread.Sleep(1000); 
 e.Result = 1000; 
 } 
 } 

 static void backgroundWorker_ProgressChanged(object sender, ProgressChangedEventArgs e) 
 { 
 Console.WriteLine("Completed" + e.ProgressPercentage + "%"); 
 } 

 static void backgroundWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e) 
 { 

 if (e.Cancelled) 
 { 
 Console.WriteLine("Operation Cancelled"); 
 } 
 else if (e.Error != null) 
 { 
 Console.WriteLine("Error in Process :" + e.Error); 
 } 
 else 
 { 
 Console.WriteLine("Operation Completed :" + e.Result); 
 } 
 } 
 } 
} 
</code></pre>

Also, referr the below link you will understand the concepts of <code>Background</code>:

<a href="http://www.c-sharpcorner.com/UploadFile/1c8574/threads-in-wpf/">http://www.c-sharpcorner.com/UploadFile/1c8574/threads-in-wpf/</a>

In my application I need to perform a series of initialization steps, these take 7-8 seconds to complete during which my UI becomes unresponsive. To resolve this I perform the initialization in a separate thread:

<pre><code>public void Initialization()
{
 Thread initThread = new Thread(new ThreadStart(InitializationThread));
 initThread.Start();
}

public void InitializationThread()
{
 outputMessage("Initializing...");
 //DO INITIALIZATION
 outputMessage("Initialization Complete");
}
</code></pre>

I have read a few articles about the <code>BackgroundWorker</code> and how it should allow me to keep my application responsive without ever having to write a thread to perform lengthy tasks but I haven't had any success trying to implement it, could anyone tell how I would do this using the <code>BackgroundWorker</code>?

How to use WPF Background Worker

在我的应用程序中，我需要执行一系列初始化步骤，这些步骤需要7-8秒才能完成，在此期间，我的UI变得没有响应。为了解决这个问题，我在一个单独的线程中执行初始化：public void Initialization(){    Thread initThread = new Thread(new ThreadStart(I...

问如何使用WPF后台工作程序
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