具有长Datatemplate的LongListSelector会导致奇怪的跳转问题 [英] LongListSelector with long Datatemplate causes weird jumping issue

问题描述

全部，

我的应用中有一个LLS，当数据模板中有大量数据时，我有一个奇怪的问题。 我有一个用户控件从Web服务器获取信息然后显示它，但如果您在
的datatemplate中放入很多文本块，也会发生此问题。 问题是，当您向下滚动并实现新项目时，长项目会跳到最后，然后长项目会消失。 关于可能导致这种情况的任何想法？

< phone：LongListSelector> 
< phone：LongListSelector.ItemTemplate> 
< DataTemplate> 
< TextBlock Text =" 1" /> 
 ... 
< TextBlock Text =" 10000" /> 
< / DataTemplate> 
< / phone：LongListSelector.ItemTemplate> 
< / phone：LongListSelector> 

解决方案

嗨Mrwizard，

我不能像你的代码片段那样在LongListSelector控件的数据模板中设置多个TextBlock控件，所以我构建了一个项目并绑定了10000个项目LongListSelector控件使用以下代码片段。

< phone：LongListSelector x：Name =" lls"的Horizo​​ntalAlignment = QUOT;左"高度= QUOT; 539"余量= QUOT; 41,30,0,0" VerticalAlignment = QUOT;陀螺"宽度= QUOT; 384"> 
 
< phone：LongListSelector.ItemTemplate> 
 
< DataTemplate> 
 
< TextBlock Text =" {Binding Name}">< / TextBlock> 
 
< / DataTemplate> 
 
< / phone：LongListSelector.ItemTemplate> 
 
< / phone：LongListSelector> 
 
 for（int i = 0; i< 10000; i ++）
 
 {
 
 list.Add（new Worker（）{Name = " hello" + i.ToString（）}）; 
 
} 
 
 lls.ItemsSource = list; 

该项目工作正常，我无法重现您的问题。

我还测试了一个项目中的大内容，然后将10000个项目绑定到控件，它似乎也可以正常工作。

您是否可以提交一个repro项目，以便在您的OneDrive上清除您的问题，然后在此处共享链接。

问候，

All,

I have a LLS in my app and I have a weird issue when there is a lot of data in the datatemplate.  I have a user control that getst information from web server and then displays it, but this issue also happens if you put in a lot of textblocks in the datatemplate.  The issue is that as you scroll down and a new item is realized, the long item skips to the end, and then the long item disappears.  Any thoughts on what could be causing this?

                <phone:LongListSelector>
                    <phone:LongListSelector.ItemTemplate>
                        <DataTemplate>
                            <TextBlock Text="1"/>
                            ...
                            <TextBlock Text="10000"/>
                        </DataTemplate>
                    </phone:LongListSelector.ItemTemplate>
                </phone:LongListSelector>

解决方案

Hi Mrwizard,

I cannot set more than once TextBlock control in data template in LongListSelector control like your code snippet, so I build a project and bind 10000 items in LongListSelector control using the following code snippet.

<phone:LongListSelector x:Name="lls" HorizontalAlignment="Left" Height="539" Margin="41,30,0,0" VerticalAlignment="Top" Width="384">

                <phone:LongListSelector.ItemTemplate>

                    <DataTemplate>

                        <TextBlock Text="{Binding Name}"></TextBlock>

                    </DataTemplate>

                </phone:LongListSelector.ItemTemplate>

                </phone:LongListSelector>

  for (int i = 0; i < 10000; i++)

            {

                list.Add(new Worker() { Name = "hello" + i.ToString() });

            }

            lls.ItemsSource = list;

The project works ok, I cannot reproduce your problem.

I also test with the large content in one item, then bind 10000 items to the control, it seems work ok too.

Can you submit a repro project to make your issue clear on your OneDrive and then share a link here.

Regards,

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