如何同步进度条与ListBox项目删除c＃ [英] How to Sync Progressbar with ListBox Items Removal c#

问题描述

我正在制作一个项目，其中我有一个listBox1一个timer1一个button1和一个progressBar1。



当我点击button1时，timer1启动。

I m making a project in which i got a listBox1 a timer1 a button1 and a progressBar1.

When i click button1 the timer1 starts.

private void button1_Click(object sender, EventArgs e)
        {
            timer1.Enabled = true;
            timer1.Interval = 500;
            progressBar1.Maximum = listBox1.Items.Count;
            progressBar1.Value = 0;
        }

当timer1滴答时，它会从listBox1中删除一个项目，progressBar1必须显示删除的进度。

When timer1 ticks it removes one item from listBox1 and progressBar1 must show the progress of Removal.

private void timer1_Tick(object sender, EventArgs e)
        {
            timer1.Enabled = false;
            if (listBox1.Items.Count > 0)
            {
                
                listBox1.Items.RemoveAt(0);
                progressBar1.Increment(1);
                groupBox1.Text = listBox1.Items.Count.ToString();
            }
            if (listBox1.Items.Count > 0)
            {
                timer1.Enabled = true;
                progressBar1.Maximum = listBox1.Items.Count;
                progressBar1.Value = 0;
            }
        }

但我认为上面的代码在progressBar1中遇到了一些错误，因为它没有显示进度而删除项目，当listBox1 items = 0时它已满。

But i think the above code got some bug with progressBar1 as it dont show progress while removal of items and it is full when the listBox1 items = 0.

推荐答案

你好朋友，当listBox1 items = 0时，进度条显示为full代码：

Hello friend, the progress bar is showing full when the listBox1 items = 0 because of the following code:

progressBar1.Maximum = listBox1.Items.Count;
progressBar1.Value = 0;

这里设置最大属性为0，下一行设置为值为0，表示进度已100％完成，因此显示已满。



现在尝试以下代码更改：

Here you're setting Maximum property as 0 and the next line you're setting Value as 0 which means progress is 100% complete hence showing full.

Now try the following code changes:

private void timer1_Tick(object sender, EventArgs e)
{
    if (listBox1.Items.Count > 0)
    {
        listBox1.Items.RemoveAt(0);
        progressBar1.Increment(1);
        groupBox1.Text = listBox1.Items.Count.ToString();
    }
    else
    {
        timer1.Enabled = false;
    }
}

- DD

- DD

试试这个

Try This

private void timer1_Tick(object sender, EventArgs e)
               {
                  if (listBox1.Items.Count > 0)
                  {
                     listBox1.Items.RemoveAt(0);
                     progressBar1.Increment(1);
                     groupBox1.Text = listBox1.Items.Count.ToString();
                  }
               }

private void timer1_Tick(object sender, EventArgs e)
{
  if (listBox1.Items.Count > 0)
  {
    listBox1.Items.RemoveAt(0);
    progressBar1.Increment(1);
    progressBar1.Value = 0;
    groupBox1.Text = listBox1.Items.Count.ToString();
  }
  else
  {
    timer1.Enabled = false;
  }
}

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