[英]C# WP8 Get selected content from listPicker
我找不到一種獲取和顯示當前所選項目內容的方法,這是XAML:
<toolkit:ListPicker Name="lp" Header="Network" SelectionChanged="selectionChanged">
<toolkit:ListPickerItem Content="aaa" />
<toolkit:ListPickerItem Content="bbb" />
</toolkit:ListPicker>
其余代碼:
private void selectionChanged(object sender, SelectionChangedEventArgs e)
{
try
{
if (e.RemovedItems != null && e.RemovedItems.Count > 0)
{
if (this.lp.SelectedItem != null)
{
var selectedItem = (sender as ListPicker).SelectedItem;
int selindex = lp.SelectedIndex; //just for testing
MessageBox.Show(selindex.ToString()); //just for testing
string text = (lp.SelectedItem as ListBoxItem).Content.ToString();
}
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
它在“字符串文本...”行給了我這個例外:
你調用的對象是空的
嘗試使用下面的代碼
try
{
if (e.RemovedItems != null && e.RemovedItems.Count > 0)
{
if (this.mode.SelectedItem != null)
{
var selectedItem = (sender as ListPicker).SelectedItem as ListPickerItem;
int selindex = mode.SelectedIndex; //just for testing
MessageBox.Show(selindex.ToString()); //just for testing
string text = (selectedItem as ListPickerItem).Content.ToString();
}
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
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