[英]Updating Progress Bar from Thread in C#
public class Consumer
{
Queue<int> queue;
Object lockObject;
public Consumer(Queue<int> queue, Object lockObject)
{
this.queue = queue;
this.lockObject = lockObject;
}
public void consume(string filepath)
{
int item = 0;
while (true)
{
lock (lockObject)
{
if (queue.Count == 0)
{
Monitor.PulseAll(lockObject);
continue;
}
item = queue.Dequeue();
if (item == 0)
{
break;
}
//do some staff
}
}
}
}
public class Producer
{
Queue<int> queue;
Object lockObject;
public int ProgressPercent = 0;
int TotalProducedElements = 0;
public bool check1 = false;
public Producer(Queue<int> queue, Object lockObject)
{
this.queue = queue;
this.lockObject = lockObject;
}
private bool IsPrime(int num)
{
if (num == 0)
return true;
num = Math.Abs(num);
for (int i = 2; i <= Math.Sqrt(num); i++)
if (num % i == 0)
return false;
return true;
}
public void produce(int target)
{
try
{
int seq = 0;
while (seq++ < target)
{
lock (lockObject)
{
int item = seq;
if (IsPrime(item))
{
queue.Enqueue(item);
}
TotalProducedElements++;
ProgressPercent = seq;
if (queue.Count == 0)
{
Monitor.PulseAll(lockObject);
}
}
}
queue.Enqueue(0);
}
catch (Exception e)
{
}
}
}
}
private void Start_Click(object sender, EventArgs e)
{
Object lockObj = new object();
Queue<int> queue = new Queue<int>();
Producer p = new Producer(queue, lockObj);
Consumer c = new Consumer(queue, lockObj);
int target = int.Parse(TargetText.Text);
string path = Path.Text;
Thread Thread1 = new Thread(() => p.produce(target));
Thread Thread2 = new Thread(()=>c.consume(path));
Thread1.Start();
Thread2.Start();
progressBar1.Maximum = target;
while(true)
{
if(p.ProgressPercent==0)
{
Thread.sleep(1000);
}
else
{
progressBar1.Value=p.ProgressPercent;
}
}
}
I have two classes working on same queue. 我有两个类在同一个队列上工作。 one to produce a set of integers and the second is to consume that integers from queue. 一个用于生成一组整数,第二个用于从队列中消耗该整数。
And during all this I want to update my progress bar by that percentage. 在这一切中,我想以百分比更新我的进度条。 So how to update progress bar from consumer without blocking for my GUI? 那么如何在不阻止我的GUI的情况下更新消费者的进度条?
Note I have used progressbar.Invoke
and delegate
but didn't work. 注意我使用了progressbar.Invoke
和delegate
但是没有用。
You need two things. 你需要两件事。 First is obviously a thread, the other is invoker. 首先显然是一个线程,另一个是调用者。
Invokers will let you change window's controls from inside of a thread. Invokers将允许您从线程内部更改窗口的控件。 Here's the example: 这是一个例子:
Invoke((MethodInvoker)delegate
{
Label1.text = "asd";
}
Threads are ran like this: 线程像这样运行:
some_thread = new Thread
(delegate()
{
{
//some_thread code
}
});
some_thread.Start();
You also need to add using System.Threading;
您还需要using System.Threading;
添加using System.Threading;
at the beginning of the file. 在文件的开头。
So, the final code should look like this: 所以,最终的代码应如下所示:
some_thread = new Thread
(delegate()
{
{
for(;;)
{
Invoke((MethodInvoker)delegate
{
//update the progress bar here
}
}
}
});
some_thread.Start();
You could use a BackgroundWorker (System.ComponentModel) to accomplish this easily. 您可以使用BackgroundWorker(System.ComponentModel)轻松完成此任务。 Take a look at: http://www.codeproject.com/Tips/83317/BackgroundWorker-and-ProgressBar-demo 看看: http : //www.codeproject.com/Tips/83317/BackgroundWorker-and-ProgressBar-demo
Clear: 明确:
while(true)
{
if(p.ProgressPercent==0)
{
Thread.sleep(1000);
}
else
{
progressBar1.Value=p.ProgressPercent;
}
}
Replace: 更换:
ProgressPercent = seq;
to 至
UpdateProgres(seq);
Add: 加:
public void UpdateProgres(int _value)
{
if (InvokeRequired)
{
Invoke(new Action<int>(UpdateProgres), _value);
return;
}
progressBar1.Value = _value;
}
Summary your needed function; 总结您需要的功能;
public void UpdateProgres(int _value)
{
if (InvokeRequired)
{
Invoke(new Action<int>(UpdateProgres), _value);
return;
}
progressBar1.Value = _value;
}
Or need Lock the value. 或者需要锁定值。 For Example; 例如;
while(true)
{
lock (p.ProgressPercent)
{
int _p = p.ProgressPercent;
}
if(_p==0)
{
Thread.sleep(1000);
}
else
{
progressBar1.Value=_p;
}
}
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