我已经实现了后台工作者类,类似于下面的示例,我想在每次完成后台工作人员时更新我的UI。如何同步wpf中的多个后台工作者类?
for (int i = 1; i < 10; i++)
{
BackgroundWorker worker = new BackgroundWorker();
worker.DoWork += new DoWorkEventHandler(Worker_DoWork);
worker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(Worker_RunWorkerCompleted);
worker.RunWorkerAsync(i);
while (worker.IsBusy == true)
{
Thread.Sleep(100);
}
}
的Worker_DoWork返回数据行和Worker_RunWorkerCompleted是增加返回结果数据网格。但该函数永远不会以正确的顺序到达Worker_RunWorkerCompleted。我怎么能解决这个问题?
编辑:
为了明确这一点,我有更详细的更新。
<my:DataGrid x:Name="theGrid" RowHeight="30" ItemsSource="{Binding Category}" AutoGenerateColumns="True" HeadersVisibility="All" Margin="235,96.5,84,65.5">
<my:DataGrid.RowDetailsTemplate>
<DataTemplate>
<Expander>
<my:DataGrid Height="300" ItemsSource="{Binding Products}" AutoGenerateColumns="True" HeadersVisibility="Column"> </my:DataGrid>
</Expander>
</DataTemplate>
</my:DataGrid.RowDetailsTemplate>
</my:DataGrid>
//List of objects
List<Category> Categories = new List<Category>();
private void button1_Click(object sender, RoutedEventArgs e)
{
for (int i = 1; i < 10; i++)
{
BackgroundWorker worker = new BackgroundWorker();
worker.DoWork += new DoWorkEventHandler(Worker_DoWork);
worker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(Worker_RunWorkerCompleted);
worker.RunWorkerAsync(i);
while (worker.IsBusy == true)
{
Thread.Sleep(100);
}
}
}
void Worker_DoWork(object sender, DoWorkEventArgs e)
{
long i = Convert.ToInt64(e.Argument);
Category cat = new Category { CategoryID = i, Name = "Category" + i };
cat.Products = new List<Product>();
for (long j = 1; j < 10; j++)
{
Product p = new Product { ProductID = (i * j), Name = "Product " + (i * j).ToString() };
cat.Products.Add(p);
}
e.Result = cat;
}
void Worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
Category cat = ((Category)e.Result);
Categories.Add(cat);
theGrid.ItemsSource = Categories;
}
}
public class Product
{
public long ProductID { get; set; }
public string Name { get; set; }
}
public class Category
{
public long CategoryID { get; set; }
public string Name { get; set; }
public List<Product> Products { get; set; }
}
目前尚不清楚 - 是你写的代码在UI线程中运行? – 2012-01-10 09:25:51
你是什么意思,“它没有达到正确的顺序” – 2012-01-10 09:28:52
我认为他的意思是,执行第一个BW和第二个之后,它不保证第一个结果在一秒之前出现。 – Tigran 2012-01-10 09:29:56