如何制作进度条表格？ [英] How to Make a progressbar form？

问题描述

我的代码如下：



我创建一个进度条形式

my code as follow:

I create a progressbarform

public partial class fmDialog : Form
{
    public int Value
    {
        get
        {
            return progressBar1.Value;
        }
        set
        {
            if (value > progressBar1.Maximum)
            {
                progressBar1.Value = progressBar1.Maximum;
            }
            else
            {
                progressBar1.Value = value;
            }
            
        }
    }
    public string NoteText
    {
        get
        {
            return label1.Text;
        }
        set
        {
            label1.Text = value;
        }
    }
    public bool IsMaxValue
    {
        get
        {
            return progressBar1.Value == progressBar1.Maximum;
        }
    }
    public fmDialog()
    {
        InitializeComponent();
    }
}

来电：

Call it：

fmDialog fm = new fmDialog();
fm.Show(this);
while (!fm.IsMaxValue)
{
    fm.Value += 10;
}
fm.close();

我的问题是：为什么我看不到进度条形码？我做错了什么？我想手动设置进度条的值。我该怎么办？

My question is: Why do not I see my progressbarform?Where I doing wrong?I want to manually set the value of the progressbar.What should I do?

推荐答案

简单地说，因为您的进度条已创建并在UI线程，在任何可以看到的值的更改之间没有时间！

试试这个：

Simply put, because your progress bar is created and updated in the UI thread, and there just isn't time between changes to the value for anything to be seen at all!
Try this:

    BackgroundWorker work = new BackgroundWorker();
    work.WorkerReportsProgress = true;
    work.ProgressChanged += new ProgressChangedEventHandler(work_ProgressChanged);
    work.DoWork += new DoWorkEventHandler(work_DoWork);
    work.RunWorkerAsync();
    }

void work_DoWork(object sender, DoWorkEventArgs e)
    {
    BackgroundWorker work = sender as BackgroundWorker;
    if (sender != null)
        {
        for (int i = 0; i < 100; i += 10)
            {
            work.ReportProgress(i);
            Sleep(500);
            }

        }
    }

void work_ProgressChanged(object sender, ProgressChangedEventArgs e)
    {
    progressBar1.Value = e.ProgressPercentage;
    }

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