0
我有兩個簡單的示例來演示我的問題。WPF列表視圖性能 - 靜態與數據綁定項目
當我運行方案1時,我可以像平常一樣瀏覽列表視圖,使用擴展選擇模式選擇項目。
當我運行場景2時,我發現導航列表視圖很慢,並且選擇項目無法正常工作。然而,很難解釋,它的主要特點是,單擊不會在大部分時間選擇光標下的項目。
任何想法?
1.Statically定義與1000個項目
<Window x:Class="WpfApplication1.StaticListView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="StaticListView" Height="300" Width="300">
<Grid>
<ListView Name="listView" SelectionMode="Extended">
<ListViewItem Content="bla" />
<ListViewItem Content="bla" />
<ListViewItem Content="bla" />
<ListViewItem Content="bla" />
<ListViewItem Content="bla" />
<ListViewItem Content="bla" />
<ListViewItem Content="bla" />
<ListViewItem Content="bla" />
<ListViewItem Content="bla" />
<ListViewItem Content="bla" />
<ListViewItem Content="bla" />
<ListViewItem Content="bla" />
<ListViewItem Content="bla" />
<ListViewItem Content="bla" />
<ListViewItem Content="bla" />
<ListViewItem Content="bla" />
<ListViewItem Content="bla" />
<ListViewItem Content="bla" />
<ListViewItem Content="bla" />
<ListViewItem Content="bla" />
....
2.Define是數據綁定到的1000個項目的列表的列表視圖列表視圖
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
namespace WpfApplication1
{
/// <summary>
/// Interaction logic for TestManyItemsInListView.xaml
/// </summary>
public partial class BoundListView : Window
{
public BoundListView()
{
InitializeComponent();
List<string> items = new List<string>();
AddItems(items);
listView.ItemsSource = items;
}
public void AddItems(List<string> items)
{
while (items.Count < 1000)
{
items.Add("bla");
}
}
}
}