/// <summary>
/// 搜索条件更改回调
/// </summary>
/// <param name="d"></param>
/// <param name="e"></param>
private static void OnSearchTextPropretyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
SearchableTextBox stb = d as SearchableTextBox;
if (stb == null || !stb._canSearching)
{
return;
}
string searchKey = e.NewValue as string;
if (string.IsNullOrEmpty(searchKey))//搜索关键字为空，不展示搜索popup
{
if (stb._popup != null)
{
stb._popup.IsOpen = false;
}
return;
}
if (stb.SearchItemsSource == null || stb.SearchItemsSource.Count == 0)//搜索源为空，显示无搜索结果
{
if (stb._popup != null)
{
stb._popup.IsOpen = true;
}
if (stb._lstSearchResult != null)
{
stb._lstSearchResult.Visibility = Visibility.Collapsed;
}
return;
}
//根据关键字搜索匹配
IList <SearchModel> searchResultList = null;
if (stb.SearchMethod != null)
{
searchResultList = stb.SearchMethod(searchKey, stb.SearchItemsSource);
}
else
{
searchResultList = stb.DefaultSearch(searchKey, stb.SearchItemsSource);
}
lock (stb)
{
stb.SearchResultCollection.Clear();
if (searchResultList != null && searchResultList.Count > 0)
{
foreach (SearchModel sm in searchResultList)
{
stb.SearchResultCollection.Add(sm);
}
}
if (stb._popup != null)
{
stb._popup.IsOpen = true;
}
if (stb._lstSearchResult != null)
{
if (stb.SearchResultCollection.Count != 0)
{
stb._lstSearchResult.Visibility = Visibility.Visible;
//每次重新搜索，从头开始展示
VirtualizingPanel virtualizingPanel = stb._lstSearchResult.GetItemsHost() as VirtualizingPanel;
if (virtualizingPanel != null)
{
virtualizingPanel.CallEnsureGenerator();
virtualizingPanel.CallBringIndexIntoView(0);
}
ListBoxItem firstItem = (ListBoxItem)stb._lstSearchResult.ItemContainerGenerator.ContainerFromIndex(0);
if (null != firstItem)
{
firstItem.UpdateLayout();
firstItem.BringIntoView();
}
}
else
{
stb._lstSearchResult.Visibility = Visibility.Collapsed;
}
}
}
}
