想太多了吧....
Private Sub lbx_detail_SelectionChanged(sender As Object, e As System.Windows.Controls.SelectionChangedEventArgs) Handles lbx_detail.SelectionChanged Select Case lbx_detail.SelectedIndex Case 0 TryCast(lbx_detail.SelectedItem, System.Windows.Controls.ListBoxItem).Background = New System.Windows.Media.SolidColorBrush(Colors.Blue) Case 1 TryCast(lbx_detail.SelectedItem, System.Windows.Controls.ListBoxItem).Background = New System.Windows.Media.SolidColorBrush(Colors.Yellow) Case 2 TryCast(lbx_detail.SelectedItem, System.Windows.Controls.ListBoxItem).Background = New System.Windows.Media.SolidColorBrush(Colors.Red) End Select End Sub

樓上大大誤會了 XD，我開的是silverlight的專案，根本沒有Select Case這種語法在裡面可用

因此上面那段可都不能用喔!!!

但是還是要感謝您的回答，我這邊的問題是 "如何取得silverlight listbox控制項內第x筆的資料

在描述得詳細一點，在web專案中方法為 ListBox1.Items(0).Text ，在silverlight可沒這種方法喔!!

>>我開的是silverlight的專案，根本沒有Select Case這種語法在裡面可用
唉~~
不知道您在說什麼....

除非你是指,在Web內鑲一個Silverlight,想要在Web去取得Silverlight內的ListBoxItem
那就真的想太多了,.........

XAML
<Grid x:Name="LayoutRoot" Background="White"> <ListBox Height="100" HorizontalAlignment="Left" Margin="10,15,0,0" Name="lbx_detail" VerticalAlignment="Top" Width="500"> <ListBoxItem Content="123456" IsSelected="False" Foreground="Red" /> <ListBoxItem Content="123456" IsSelected="False" Foreground="Orange" /> <ListBoxItem Content="123456" IsSelected="False" Foreground="Blue" /> </ListBox> </Grid>

VB Code
Partial Public Class MainPage Inherits UserControl Public Sub New() InitializeComponent() End Sub Private Sub lbx_detail_SelectionChanged(sender As Object, e As System.Windows.Controls.SelectionChangedEventArgs) Handles lbx_detail.SelectionChanged Select Case lbx_detail.SelectedIndex Case 0 TryCast(lbx_detail.SelectedItem, System.Windows.Controls.ListBoxItem).Background = New System.Windows.Media.SolidColorBrush(Colors.Blue) Case 1 TryCast(lbx_detail.SelectedItem, System.Windows.Controls.ListBoxItem).Background = New System.Windows.Media.SolidColorBrush(Colors.Yellow) Case 2 TryCast(lbx_detail.SelectedItem, System.Windows.Controls.ListBoxItem).Background = New System.Windows.Media.SolidColorBrush(Colors.Red) End Select End Sub End Class

Brush brush = new SolidColorBrush(Colors.Yellow);//你要修改的顏色 //方法1：當點選時，自動修改點選項目 private void lbx_detail_SelectionChanged(object sender, SelectionChangedEventArgs e) { if (e.AddedItems == null || e.AddedItems.Count == 0) return; ListBoxItem item = e.AddedItems[0] as ListBoxItem; if (item == null) return; item.Background = brush; } //方法2：程式判斷修改點選項目 private void button1_Click(object sender, RoutedEventArgs e) { if (this.lbx_detail.SelectedItem == null) { MessageBox.Show("請先選擇項目"); return; } ListBoxItem item = this.lbx_detail.SelectedItem as ListBoxItem; if (item == null) return; item.Background = brush; } //方法3：修改特定項目 private void button2_Click(object sender, RoutedEventArgs e) { int index = 1; //要修改項目的索引值 if (this.lbx_detail.Items == null || this.lbx_detail.Items.Count <= index) return; ListBoxItem item = this.lbx_detail.Items[index] as ListBoxItem; if (item == null) return; item.Background = brush; }