在foreach（）中的C＃进度条值 [英] C# Progressbar value in foreach()

问题描述

我有这样的代码：

pre $ private $ button1_Click（object sender，EventArgs e）
{
var max = 0;
foreach（textBox2.Text.Split（'，'）中的var地址）
{
max = +1;
}
var maxp = 100 / max;
foreach（textBox2.Text.Split（'，'）中的var地址）
{
SendMessage（address）;
progressBar1.Value = + maxp;






$ p

它计算文本框中有多少封电子邮件，然后做一个比例。给每个发送的邮件添加进度值，问题是当我按下按钮时，进度条不动。当所有电子邮件发送时，进度条移动到中风结束。
我该怎么办？

解决方案

发生这种情况是因为循环和ui在同一个线程上执行。虽然循环繁忙，但无法更新ui

您可以使用 BackgroundWorker 来运行循环在后台的另一个线程中，然后使用BackgroundWorker的 ProgressChanged 事件更新您的进度条。您可以了解更多有关BackgroundWorkers 此处

I have this code:

 private void button1_Click(object sender, EventArgs e)
    {
        var max = 0;
        foreach (var address in textBox2.Text.Split(','))
        {
            max = +1;
        }
        var maxp = 100 / max;
        foreach (var address in textBox2.Text.Split(','))
        {
            SendMessage(address);
            progressBar1.Value = +maxp;
        }
    }

It calculates how many emails are in the textbox, and then makes a proportion. To each email sent adds the value of progress, the problem is that when I press the button, the progressbar does not move. When all emails are sent the progressbar moves to the end of stroke. How can I do?

解决方案

This happens because you loop and the ui are executing on the same thread. While the loop is busy, it can't update the ui

You can use a BackgroundWorker to run the loop on a different thread in the background, then use the BackgroundWorker's ProgressChanged event to update your progressbar. You can learn more about BackgroundWorkers here

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