好的,所以我有一个像这样的问题.
public Class A{
public A(){
progressBar.Style = ProgressBarStyle.Marquee;
progressBar.MarqueeAnimationSpeed = 0;
}
public void DoSomething(){
if(checkpasses){
progressBar.MarqueeAnimationSpeed = 100;
//Do something here...
progressBar.MarqueeAnimationSpeed = 0;
}
else
//Do nothing...
}
}
问题是我的进度条根本不会开始移动.首先,我认为它不会自己创建一个新线程(我发现有线)所以我尝试创建一个线程,但仍然是相同的结果.什么都没发生.这是我忘记的事吗？
解决方法
您在此处“执行某些操作”代码将阻止UI线程,因此在DoSomething方法完成之前,您将看不到进度条更新.那时你将动画速度设置回0.
尝试将您的“在这里做一些”代码放在一个单独的线程上.该线程完成后,将动画速度设置回0.
像这样的东西：
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
backgroundWorker1.DoWork += new DoWorkEventHandler(backgroundWorker1_DoWork);
backgroundWorker1.RunWorkerCompleted += new RunWorkerCompletedEventHandler(backgroundWorker1_RunWorkerCompleted);
}
private void backgroundWorker1_RunWorkerCompleted(object sender,RunWorkerCompletedEventArgs e)
{
progressBar1.MarqueeAnimationSpeed = 0;
progressBar1.Style = ProgressBarStyle.Blocks;
progressBar1.Value = progressBar1.Minimum;
}
private void backgroundWorker1_DoWork(object sender,DoWorkEventArgs e)
{
DoSomething();
}
private void button1_Click(object sender,EventArgs e)
{
progressBar1.Style = ProgressBarStyle.Marquee;
progressBar1.MarqueeAnimationSpeed = 100;
backgroundWorker1.RunWorkerAsync();
}
private void DoSomething()
{
Thread.Sleep(2000);
}
}
