我有一个WPF应用程序,通过工具包(VS 2008)自动完成框。我有大约2000条记录的潜在人口,我试图通过组合填充事件过程来提高性能。我得到的结果不一致。该过滤器似乎没问题,但我可以运行应用程序一次,结果X将在那里,但结果Y不会。再次运行它可以使结果Y在那里而不是X,随后的时间X和Y都会在那里,等等等等。这是我第一次使用自动完成框,所以我相信它肯定是我的代码中的东西,我忘了。如果在Itemsource绑定之前检查我的结果集,那么所需的结果就在那里,但它们对用户不可见 - 下拉式自动完成后不显示。也许我需要一个事件重写?自动完成框 - 来自人口的值不一致
的XAML
<input:AutoCompleteBox
Name="autGlobal"
FilterMode="Contains"
Style="{DynamicResource MiniSearchAutoBoxWPF}"
IsTextCompletionEnabled="false"
Margin="5, 0, 5, 0"
HorizontalAlignment="Center"
KeyUp="autGlobal_KeyUp"
Text="Search Term"
GotFocus="autGlobal_GotFocus"
ValueMemberPath="Item"
Populating="AutoCompleteBox_Populating"
>
方法
private void AutoCompleteBox_Populating(object sender, PopulatingEventArgs e)
{
e.Cancel = true;
var b = new BackgroundWorker();
currSearch = autGlobal.Text;
b.DoWork += b_DoWork;
b.RunWorkerCompleted += b_RunWorkerCompleted;
b.RunWorkerAsync(autGlobal.Text);
}
private void b_DoWork(object sender, DoWorkEventArgs e)
{
Results.Clear();
int counter = 0;
string search = e.Argument.ToString();
search = search.ToUpper();
foreach (GlobalSearchList person in myGlobalList)
{
if (person.Item.ToUpper().Contains(search))
{
Results.Add(person);
counter++;
if (counter >= MAX_NUM_OF_RESULTS)
{
break;
}
}
}
}
private void b_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
if (this.Dispatcher.Thread == System.Threading.Thread.CurrentThread)
{
//Set the source
if (currSearch == autGlobal.Text)
{
autGlobal.ItemsSource = Results;
autGlobal.PopulateComplete();
}
}
else
{
this.Dispatcher.Invoke(new Action(() =>
{
//Set the source
if (currSearch == autGlobal.Text)
{
autGlobal.ItemsSource = Results;
autGlobal.PopulateComplete();
}
}));
}
}
似乎这种情况正在做一些事情......“counter> = MAX_NUM_OF_RESULTS”..我认为这是防止少数记录.. – Bathineni 2012-01-05 17:39:59