我想滚动到LongListSelector中的特定项目,但是当我调用llsTest.ScrollTo(m)函数时,我的longlistselector找不到它并崩溃。在LongListSelector中找不到WP8项目
C#:
public class MyItem
{
public string s1 {get;set;}
public string z1 {get;set;}
}
List<MyItem> list= new List<MyItem>();
list.Add(new MyItem() { s1 = "First", z1 = "Second" });
list.Add(new MyItem() { s1 = "Third", z1 = "Fourth" });
list.Add(new MyItem() { s1 = "Fifth", z1 = "Sixth" });
list.Add(new MyItem() { s1 = "Sek8", z1 = "kj98" });
list.Add(new MyItem() { s1 = "lkdsj9", z1 = "lkdjo0" });
list.Add(new MyItem() { s1 = "jkdlhf", z1 = "98uifie" });
list.Add(new MyItem() { s1 = "Seventh11", z1 = "Eighth32" });
list.Add(new MyItem() { s1 = "Seventh45", z1 = "Eighth67" });
list.Add(new MyItem() { s1 = "Seventh86", z1 = "Eighth89" });
list.Add(new MyItem() { s1 = "Seventh6", z1 = "Eighth7" });
list.Add(new MyItem() { s1 = "Sevent4h", z1 = "Eighth8" });
list.Add(new MyItem() { s1 = "Seventh7i", z1 = "Eighthlp" });
list.Add(new MyItem() { s1 = "Seventh-09", z1 = "Eighth-0" });
list.Add(new MyItem() { s1 = "Seventh1q", z1 = "Eighthh65" });
list.Add(new MyItem() { s1 = "Second Last", z1 = "Last" });
MyItem m = new MyItem() { s1 = "Second Last", z1 = "Last" };
llsTest.ItemsSource = list;
llsTest.ScrollTo(m); // **<========Crashes here, m cannot be found!**
这里是XAML:
<phone:LongListSelector Name="llsTest">
<phone:LongListSelector.ItemTemplate>
<DataTemplate>
<TextBlock>
<Run Text="{Binding s1}"/><LineBreak/>
<Run Text="{Binding z1}"/>
</TextBlock>
</DataTemplate>
</phone:LongListSelector.ItemTemplate>
</phone:LongListSelector>
那么调用之前调用
list.Add(m)
到llsTest.ScrollTo(m);
然后ü可以删除多余的元素,我没有事先的索引信息。我想滚动到基于项目内容的项目。这有可能吗?我用简单的字符串尝试过同样的事情。如果longlistselector用简单的字符串填充,那么scrollto可以很好地使用我使用它的方式。但是当我使用基于类的项目时,scrollto失败。有任何想法吗? – user3656651
在这种情况下,循环访问列表并根据要滚动的内容找到项目的索引。然后通过项目索引滚动到正如我在代码 – Hitesh