更新UI的WinForms从后台线程结果 [英] Update Winforms UI from background thread result

问题描述

这可能是一个愚蠢的问题，但我无法找到计算器一个答案。

This is probably a silly question, but I could not find an answer on stackoverflow.

我有运行一个线程在WinForm的应用程序一键点击事件caclulate结果的形式来显示。

I have a button click event in a Winform app that runs a thread to caclulate a result to display in a form.

如何更新当线程计算的结果，表单的用户界面？

How do I update the Forms UI when the thread has calculated the result?

    private void btnRequestR2Approval_Click(object sender, EventArgs e)
    {
        if (User.IsLogged)
        {
            ValidationResults results = new ValidationResults();
            results.Show();

            Logger log = Logger.Instance();
            Logger.NewLogAddedHandler messageDelegate = new Logger.NewLogAddedHandler(results.NewLogMessage);

            if (!log.IsEventHandlerRegistered())
            {
                log.NewLogAdded += messageDelegate;
            }

            ThreadStart operation = new ThreadStart(ValidateAndSubmit);
            Thread theThread = new Thread(operation);
            theThread.Start();

        }
        else
        {
            MessageBox.Show("Please login");
        }

    }

感谢您

推荐答案

最简单的方法，用于执行的WinForms后台任务是使用<一个href="http://msdn.microsoft.com/en-us/library/system.componentmodel.backgroundworker.aspx?ppud=4">BackgroundWorker.

The simplest technique for executing a background task in WinForms is to use a BackgroundWorker.

• 拖放到一个表单。
• 线了的事件。作为最低要求，使用的DoWork 。你可能还需要 RunWorkerCompleted 。
• 写您的后台任务在的DoWork 事件。
• 写在 RunWorkerCompleted 事件的任何用户界面的变化。
• 呼叫 backgroundWorker1.RunWorkerAsync（）; 揭开序幕的过程中，可能是由一些按钮处理程序
。

• Drop it onto a form.
• Wire up the events. As a minimum, use DoWork. You'll probably also want RunWorkerCompleted.
• Write your background task in the DoWork event.
• Write any UI changes in the RunWorkerCompleted event.
• Call backgroundWorker1.RunWorkerAsync(); to kick off the process, probably from some button handler.

使用一个BackgroundWorker避免了所有烦人的线程处理和IsInvokeRequired的东西。

Using a BackgroundWorker avoids all the annoying thread handling and IsInvokeRequired stuff.

下面是一个更详细的如何对文章。

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