从不同的线程更新在主窗口的进度条 [英] Update progress bar in MainWindow from a different Thread

问题描述

我知道这个问题已经被问了几次的我整天都在试图了解其他的答案，但因为我很新的C＃和WPF没有什么帮助了我那么远。我会尝试尽可能我可以这样它会直接帮我解释一下我的具体问题。

I know this question has been asked several times an I spent all day trying to understand other answers, but since I am very new to C# and WPF nothing helped me so far. I will try to explain my exact problem as much as I can so it will directly help me.

在我的MainWindow.xaml我有一个进度条和一些按钮启动新线程和一个长的计算：

In my MainWindow.xaml I have a progress bar and some button starting a new thread and a long calculation:

<ProgressBar Height="....... Name="progressBar1"/>
<Button Content="Button" Name="button1" Click="button1_Click" />

现在我MainWindow.xaml.cs内：

Now within my MainWindow.xaml.cs:

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
    }

    private void button1_Click(object sender, RoutedEventArgs e)
    {
        Thread thread = new Thread(new ParameterizedThreadStart(MyLongCalculation));

        ParameterClass myParameters = new ParameterClass();
        thread.Start(myParameters);
    }

    public void MyLongCalculations(object myvalues)
    {
        ParameterClass values = (ParameterClass)myvalues;
        //some calculations
    }
}

public class ParameterClass
{
    //public variables...
}

现在不知何故，我必须包括somethign在我的方法MyLongCalculations，将不断更新 progressBar1 。但是，我不能设法得到它的工作。
我知道这是很简单的，但不幸的是我在此刻与C＃的水平，所以我希望答案不是太复杂，并尽可能详细将是巨大的。

Now somehow I have to include somethign in my method MyLongCalculations that will keep updating progressBar1. However, I just can't manage to get it working. I know all this is very simple, but unfortunately it is the level I am at the moment on with C# so I hope an answer not too complicated and as detailed as possible would be great.

推荐答案

后台工作很适合这个

试试这个：

/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
    public MainWindow()
    {
        // Initialize UI
        InitializeComponent();

        // Process data
        ProcessDataAsync(new ParameterClass { Value = 20 });
    }

    /// <summary>
    /// Processes data asynchronously
    /// </summary>
    /// <param name="myClass"></param>
    private void ProcessDataAsync(ParameterClass myClass)
    {
        // Background worker
        var myWorker = new BackgroundWorker
        {
            WorkerReportsProgress = true,
        };

        // Do Work
        myWorker.DoWork += delegate(object sender, DoWorkEventArgs e)
        {
            // Set result
            e.Result = MyLongCalculations(myClass);

            // Update progress (50 is just an example percent value out of 100)
            myWorker.ReportProgress(50);
        };

        // Progress Changed
        myWorker.ProgressChanged += delegate(object sender, ProgressChangedEventArgs e)
        {
            myProgressBar.Value = e.ProgressPercentage;
        };

        // Work has been completed
        myWorker.RunWorkerCompleted += delegate(object sender, RunWorkerCompletedEventArgs e)
        {
            // Work completed, you are back in the UI thread.
            TextBox1.Text = (int) e.Result;
        };

        // Run Worker
        myWorker.RunWorkerAsync();
    }

    /// <summary>
    /// Performs calculations
    /// </summary>
    /// <param name="myvalues"></param>
    /// <returns></returns>
    public int MyLongCalculations(ParameterClass myvalues)
    {
        //some calculations
        return (myvalues.Value*2);
    }

}

/// <summary>
/// Custom class
/// </summary>
public class ParameterClass
{
    public int Value { get; set; }
}

这篇关于从不同的线程更新在主窗口的进度条的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！