//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();
}
}
}
这是公共静态类中的 MyMethod。我想让它在 BackgroundWorker 下的表单中运行,以便能够暂停和恢复执行。
我正在使用这个类:
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
然后,在 myForm 中:
private void button1_Click(object sender, EventArgs e)
{
BackgroundLoading bl = new BackgroundLoading(MyMethod());
bl.Start();
}
我对 BackgroundWorker 真的很陌生,可能我没有以正确的方式使用它。单击 StopExecution 按钮时,并非我的所有文档(doc1、doc2、doc3)都已保存。那么如何避免在 try-catch 块中停止呢?