如何在Windows Phone應用程序的C＃中從列表選擇器中以字符串形式獲取selecteditem

Question

這是我的XAML代碼

<toolkit:ListPicker SelectionChanged="CountryLP_SelectionChanged" Header="--Select Mode--"  ItemsSource="{Binding CountryListdata,  ElementName=this}" x:Name="CountryLP" VerticalAlignment="Center">
    <toolkit:ListPicker.ItemTemplate>
        <DataTemplate >
            <StackPanel>
                <TextBlock  Text="{Binding country}" />
            </StackPanel>
        </DataTemplate>
    </toolkit:ListPicker.ItemTemplate>
    <toolkit:ListPicker.FullModeItemTemplate>
        <DataTemplate >
            <StackPanel>
                <TextBlock  Text="{Binding country}" />
            </StackPanel>
        </DataTemplate>
    </toolkit:ListPicker.FullModeItemTemplate>
</toolkit:ListPicker>

在頁面加載期間，控件自動轉到事件CountryLP_SelectionChanged，我想獲取選定的項目字符串

這是ac＃代碼，用於將Values設置為listpicker

//to get values from webservice
public class CountryList
{
    public String id{ get; set; }
    public String country{ get; set; }
}

private void CountryLP_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
    if (CountryLP.SelectedItem == null)
        return;

    //var s= (sender as ListPicker).SelectedItem;
    CountryList s= CountryLP.SelectedItem as CountryList;
    //string s= CountryLP.SelectedItem as string;
    //string s= CountryLP.SelectedItem.toString();
    System.Diagnostics.Debug.WriteLine(s);
}

我嘗試了幾種方法，但是沒有得到字符串值。 誰能幫我這個？

Answer 1

代碼看起來不錯。 您可以通過將其添加到配置文件中來處理此異常。

<configuration>
   <runtime>
      <legacyCorruptedStateExceptionsPolicy enabled="true" />
   </runtime>
</configuration>

也試試

var content = ((ListPickerItem)CountryLP.SelectedItem).Content;