[C# windows窗体]在线程中调用listview时，其他控件不起作用
我是 C# 新手，我希望我对问题的描述是可读的。 这是我的问题，我正在为 win6.5 手机开发一个应用程序。该应用程序应该有一些菜单项，其中一个是“扫描”，单击时，它会重复扫描附近的 wifi 接入点，并将其显示在列表视图上。因此，我创建了一个带有 while 循环的线程，每 10 秒扫描一次，我还使用 listview.invoke 使 listview 在线程中可访问。单击“扫描”时，一切看起来都很好，但是，由于 while 循环线程的运行，无法单击其他菜单项。卡在这里好几天了，非常感谢大家的帮助~
private void menuItemScan_Click(object sender, EventArgs e)
{
...
Thread t = new Thread(new ThreadStart(ScanThread));
t.Start();
}
private void ScanThread()
{
listView1.Invoke(new APScanCallback(APScan));
}
public void APScan()
{
while (true)
{
listView1.Items.Clear();
foreach (AccessPoint ap in wzcInterface.NearbyAccessPoints)
{
ListViewItem item = new ListViewItem(ap.Name);
item.SubItems.Add(ap.PhysicalAddress.ToString());
item.SubItems.Add(ap.SignalStrength.Decibels.ToString());
item.SubItems.Add(ap.AuthenticationMode.ToString());
listView1.Items.Add(item);
}
listView1.Refresh();
Thread.Sleep(10000);
}
}
I am new to C#, I hope my description of the problem is readable.
Here's my problem, I am developing a app for a win6.5 mobile. The App should have some memu items, one is 'scan', when clicked, it scans repeatedly the wifi access points nearby, and displays them on a listview. So i create a thread with a while loop for scanning every 10 seconds, i also use listview.invoke to make the listview accessible in the thread. Things looks fine when 'scan' is clicked, however, other menu items cannot be clicked due to the running of the while loop thread. I stuck here for several days, many thanks for u guys help~
private void menuItemScan_Click(object sender, EventArgs e)
{
...
Thread t = new Thread(new ThreadStart(ScanThread));
t.Start();
}
private void ScanThread()
{
listView1.Invoke(new APScanCallback(APScan));
}
public void APScan()
{
while (true)
{
listView1.Items.Clear();
foreach (AccessPoint ap in wzcInterface.NearbyAccessPoints)
{
ListViewItem item = new ListViewItem(ap.Name);
item.SubItems.Add(ap.PhysicalAddress.ToString());
item.SubItems.Add(ap.SignalStrength.Decibels.ToString());
item.SubItems.Add(ap.AuthenticationMode.ToString());
listView1.Items.Add(item);
}
listView1.Refresh();
Thread.Sleep(10000);
}
}
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Control.Invoke 将方法执行“排队”到处理 UI 的线程（以便将这些例程调用序列化到其他 UI 例程调用）。
即使您启动一个调用 Control.Invoke 的线程，例程 APSScan 也会在调用 Application.Run 的线程中执行...我看到 APSScan 永远不会返回，导致冻结 UI线。
解决方案是多次调用 Control.Invoke，在 ScanThread 例程中循环。
使用您的代码：
Control.Invoke "enqueue" the method execution to the thread handling UI (in order to serialize those routine call to the other UI routine calls).
Even if you start a thread which calls Control.Invoke, the routine
APSScanis executed in thread which has called Application.Run... and what I see is that APSScan never returns, causing to freeze the UI thread.The solution is to call Control.Invoke multiple times, looping in
ScanThreadroutine.Using your code:
您的代码实际上在主线程中运行。
listView1.Invoke(new APScanCallback(APScan));
此代码在主应用程序线程中提交 APScan 的执行。只需使用计时器代替工作线程即可。
Your code is actually running in the main thread.
listView1.Invoke(new APScanCallback(APScan));
This code submits execution of APScan in the main application thread. Just use the timer insteaf of worker thread.