Hi,
Gridview的Loaded事件触发的话表示GridView中所有的item都加载完毕了。您是指您在后台选中了一个item,然后scrollviewer会移动相对应的位置吗？如果是这样子的话，您可以通过VisualTreeHelper来得到GridView里面的Scrollviewer，然后用ScrollViewer.ScrollToVerticalOffset或者ScrollViewer.ScrollToHorizontalOffset方法来设置将ScrollViewer
内的内容滚动到指定的垂直或者水平偏移量位置。
以下是一个例子您可以参考：
XAML:
<Grid Background="{StaticResource ApplicationPageBackgroundThemeBrush}" Name="grid">
<GridView ItemsSource="{Binding}" Name="gridview" Loaded="gridview_Loaded" Width="300" Height="100" ScrollViewer.IsHorizontalRailEnabled="True" ScrollViewer.HorizontalScrollBarVisibility="Visible">
<GridView.ItemTemplate>
<DataTemplate>
<StackPanel>
<Image Source="{Binding Image}" Width="100" Height="100"/>
</StackPanel>
</DataTemplate>
</GridView.ItemTemplate>
</GridView>
</Grid>
Code-Behind:
public sealed partial class MainPage : Page
{
public MainPage()
{
this.InitializeComponent();
List<tt> TT = new List<tt>();
TT.Add(new tt("Assets/Logo.png"));
TT.Add(new tt("Assets/Logo.png"));
TT.Add(new tt("Assets/Logo.png"));
TT.Add(new tt("Assets/Logo.png"));
grid.DataContext = TT;
}
/// <summary>
/// Invoked when this page is about to be displayed in a Frame.
/// </summary>
/// <param name="e">Event data that describes how this page was reached. The Parameter
/// property is typically used to configure the page.</param>
protected override void OnNavigatedTo(NavigationEventArgs e)
{
}
private void vtree(DependencyObject obj, int level)
{
for (int i = 0; i < VisualTreeHelper.GetChildrenCount(obj); ++i)
{
vtree(VisualTreeHelper.GetChild(obj, i), ++level);
if(VisualTreeHelper.GetChild(obj,i).GetType().Equals(typeof(ScrollViewer)))
{
ScrollViewer scoller = VisualTreeHelper.GetChild(obj, i) as ScrollViewer;
scoller.ScrollToHorizontalOffset(gridview.SelectedIndex+1);
}
}
}
private void gridview_Loaded(object sender, RoutedEventArgs e)
{
gridview.SelectedIndex = 3;
DependencyObject deObj = sender as DependencyObject;
vtree(deObj, 0);
}
}
public class tt
{
public tt( string image)
{
this.Image = image;
}
public string Image
{
get;
set;
}
}
}
或者您还可以通过一个更简单的方法，用Gridview自带的ScrollIntoView(Object, ScrollIntoViewAlignment) 方法，代码如下：
private void gridview_Loaded(object sender, RoutedEventArgs e)
{
gridview.SelectedIndex = 3;
gridview.ScrollIntoView(gridview.SelectedItem, ScrollIntoViewAlignment.Default);
}
祝您好运！
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Thanks
MSDN Community Support
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