//static int var1, var2, var3;
//static List<string> list;
public static void MyMethod(Object obj, int times)
{
List = doc1.Descendants("Order")
.Select(d => d.Value)
.ToList();
for (int i = 0; i < List.Count; i++)
{
try
{
var item = (from m in doc1.Elements("list").Elements("Order")
where m.Value == List[i]
select m);
item.Remove();
doc1.Save(path1);
var1 = doc1.Root.Descendants("Order").Count();
//DoSomethingHeavy with List[i]
doc2.Element("list2").Add(new XElement("Order", List[i]));
doc2.Save(path2);
var2= doc2.Root.Descendants("Order").Count();
}
catch (Exception)
{
doc3.Element("list3").Add(new XElement("Order", List[i]));
doc3.Save(path3);
var3 = doc3.Root.Descendants("Order").Count();
}
}
}
這是一個公共靜態類中的MyMethod。 我想使其在BackgroundWorker下的表單中運行,以便能夠暫停和恢復執行。BackgrounderWorker在try-catch塊中停止
我使用這個類:
public class BackgroundLoading
{
public BackgroundWorker Bw;
public delegate void RunFunction();
public RunFunction thisFunction;
public BackgroundLoading(RunFunction newFunction)
{
thisFunction = newFunction;
Bw = new BackgroundWorker();
Bw.DoWork += new DoWorkEventHandler(Bw_DoWork);
Bw.RunWorkerCompleted += new RunWorkerCompletedEventHandler(Bw_RunWorkerCompleted);
}
public void Start()
{
Bw.RunWorkerAsync();
}
void Bw_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
if (e.Error != null)
{
//an error occured
MessageBox.Show("an error occured: " + e.Error.Message);
}
if (e.Cancelled)
{
//an error occured
MessageBox.Show("Job cancelled");
}
else
{
MessageBox.Show("Job completed");
}
}
void Bw_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
MessageBox.Show(" *");
}
void Bw_DoWork(object sender, DoWorkEventArgs e)
{
if (thisFunction != null)
thisFunction();
}
}
//class to implement
然後,在myForm會:
private void button1_Click(object sender, EventArgs e)
{
BackgroundLoading bl = new BackgroundLoading(MyMethod());
bl.Start();
}
我真的很新的BackgroundWorker,可能我不使用它的正確方法。 單擊StopExecution按鈕時,並非我的所有文檔(doc1,doc2,doc3)都已保存。 那麼,如何避免在try - catch塊中停止?
你如何處理*停止*執行請求? – Tigran 2012-08-12 09:45:22
這種方式private void btnStop_Click(object sender,EventArgs e) if(backgroundWorker.WorkerSupportsCancellation == true) { {0} backgroundWorker.CancelAsync(); } } – Barbara 2012-08-12 09:51:19
Bgw不適合暫停/恢復。取消需要將一個標誌暴露給'MyMethod()'。 – 2012-08-12 10:03:29