blocks|key|2107085|text|你应该检查BackgroundWorker类。它支持进程，并正确处理线程之间的通信。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2107086|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/system.componentmodel.backgroundworker.aspx^0|5|G|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

You should check <a href="http://msdn.microsoft.com/en-us/library/system.componentmodel.backgroundworker.aspx" rel="nofollow">BackgroundWorker</a> class. It supports progress and handles communication between threads properly.

blocks|key|1364436|text|您可以像这样启动一个新线程：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1364437|Thread+t1+=+new+Thread(methodnametocall);
+++t1.start();

void+methodnametocall()
{
+++this.Invoke((MethodInvoker)delegate
+++{

++++++++control+to+update;
++++}
});|code-block|syntax|javascript|1364438|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You would start a new thread as such:

<pre><code>Thread t1 = new Thread(methodnametocall);
 t1.start();

void methodnametocall()
{
 this.Invoke((MethodInvoker)delegate
 {

 control to update;
 }
});
</code></pre>

blocks|key|1364450|text|如果将进度条绑定到数据属性，则不需要手动切换线程上下文。WPF绑定引擎将自动为您完成此操作。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1364451|<ProgressBar+Value={Binding+Progress}+/>|code-block|syntax|javascript|1364452|然后在你的线程中：|1364453|foreach+(MyClass+cls+in+Results)
{++++++++++++++++
++++++//+databinding+will+automatically+marshal+to+UI+thread
++++++this.Progress%2B%2B;
++++++cls.GetHistoryData();
}|1364454|在大多数情况下，这比使用Dispatcher.Invoke或BackgroundWorker自己编组要干净得多，也不容易出错|offset|length|1364455|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/system.windows.threading.dispatcher.invoke.aspx|1|http://msdn.microsoft.com/en-us/library/system.componentmodel.backgroundworker.aspx^0|0|0|0|0|C|H|0|U|G|1|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|10|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|12|8|@]|9|@$M|13|N|14|1|15]|$M|16|N|17|1|18]]|A|$]]|$1|O|3|-4|5|6|7|19|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V]]|W|$5|R|S|T|A|$U|X]]]]

If you bind the progressbar to a data property you do not need to switch the thread context manually. The WPF binding engine will do this automatically for you.

<pre><code>&lt;ProgressBar Value={Binding Progress} /&gt;
</code></pre>

And then in your thread:

<pre><code>foreach (MyClass cls in Results)
{ 
 // databinding will automatically marshal to UI thread
 this.Progress++;
 cls.GetHistoryData();
}
</code></pre>

In most cases this is much cleaner and less error prone than marshalling on your own using <a href="http://msdn.microsoft.com/en-us/library/system.windows.threading.dispatcher.invoke.aspx" rel="nofollow">Dispatcher.Invoke</a> or <a href="http://msdn.microsoft.com/en-us/library/system.componentmodel.backgroundworker.aspx" rel="nofollow">BackgroundWorker</a>

blocks|key|25507|text|尝尝这个|type|unstyled|depth|inlineStyleRanges|entityRanges|data|25508|progressBar1.Minimum+=+0;
progressBar1.Maximum+=+Results.Count;

foreach+(MyClass+cls+in+Results)
{
++++ThreadPool.QueueUserWorkItem((o)+=>
+++++++++++++{
+++++++++++++++++progressBar1.Dispatcher.BeginInvoke(
+++++++++++++++++++++(Action)+(()+=>+progressBar1.Value+%2B=+1));
+++++++++++++++++cls.GetHistoryData();
+++++++++++++});
}|code-block|syntax|javascript|25509|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

try this

<pre><code>progressBar1.Minimum = 0;
progressBar1.Maximum = Results.Count;

foreach (MyClass cls in Results)
{
 ThreadPool.QueueUserWorkItem((o) =&gt;
 {
 progressBar1.Dispatcher.BeginInvoke(
 (Action) (() =&gt; progressBar1.Value += 1));
 cls.GetHistoryData();
 });
}
</code></pre>

blocks|key|25523|text|您链接到的文章是一个winforms示例，但是您正在制作一个WPF应用程序。在您的示例中，应该考虑改用通过控件的Dispatcher属性获得的Dispatcher类。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|25524|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/system.windows.threading.dispatcherobject.dispatcher.aspx|1|http://msdn.microsoft.com/en-us/library/system.windows.threading.dispatcher.aspx^0|1K|A|1Z|A|1K|A|0|1Z|A|1|0^^$0|@$1|2|3|4|5|6|7|P|8|@$9|Q|A|R|B|C]|$9|S|A|T|B|C]]|D|@$9|U|A|V|1|W]|$9|X|A|Y|1|Z]]|E|$]]|$1|F|3|-4|5|6|7|10|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]|N|$5|I|J|K|E|$L|O]]]]

The article you link to is a winforms example, but you are making a WPF application. In your case, you should look into using the <a href="http://msdn.microsoft.com/en-us/library/system.windows.threading.dispatcher.aspx" rel="nofollow"><code>Dispatcher</code></a> class instead, that you get through the <a href="http://msdn.microsoft.com/en-us/library/system.windows.threading.dispatcherobject.dispatcher.aspx" rel="nofollow"><code>Dispatcher</code></a> property of the control.

I have the following code:

<pre><code> progressBar1.Minimum = 0;
 progressBar1.Maximum = Results.Count;

 foreach (MyClass cls in Results)
 { 
 progressBar1.Value += 1;

 // Go to DB and get large quantity of data
 cls.GetHistoryData();

 }
</code></pre>

What I’d like to do is shift the processing to another thread so that progressBar1 updates correctly. I’ve found an <a href="http://twigstechtips.blogspot.com/2008/08/c-threading-update-progress-bar.html" rel="nofollow">article</a> that implies that I should be able to use the Invoke method on the progress bar, but there doesn’t appear to be one.

Updating UI while running task

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。

文章

问答

视频

学习中心

腾讯云实验室

直播

竞赛

腾讯云代码分析专区

腾讯iOA零信任安全管理系统专区

腾讯云架构师技术同盟交流圈

腾讯云数据库专区

腾讯云顾问专区

腾讯云原生专区

腾讯混元专区

腾讯云TCE专区

腾讯云Lighthouse专区

腾讯云HAI专区

腾讯云Edgeone专区

腾讯云存储专区

腾讯云智能专区

腾讯轻联专区 

腾讯云开发专区

TAPD专区

腾讯轻量云游戏服专区

腾讯云最具价值专家

腾讯云架构师技术同盟

腾讯云创作之星

腾讯云开发者先锋

腾讯云代码助手

云原生构建

TAPD 敏捷项目管理

Cloud Studio

SDK中心

API中心

命令行工具

涵盖代码开发、场景应用、自动测试全流程，助你从零构建专属AI助手

一站式MCP教程库，解锁AI应用新玩法

我有以下代码：        progressBar1.Minimum = 0;        progressBar1.Maximum = Results.Count;        foreach (MyClass cls in Results)        {                          ...

问运行任务时更新UI
EN

Stack Overflow用户

社区

活动

圈层

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问运行任务时更新UIEN