这是我使用的mod

Question

我无法在ListView

中获取点击的项目

MainPage.xaml中

 <ListView 
                    ReorderMode="Disabled"
                    SelectionMode="Single"
                    IsItemClickEnabled="True"
                    ItemClick="Section_ItemClick"
                    ContinuumNavigationTransitionInfo.ExitElementContainer="True">

                    <ListViewItem Margin="0,0,0,10" Background="LightGray">
                        <StackPanel Orientation="Horizontal">
                            <Image Source="/Assets/Icons/1.png" Width="94" Height="94"/>
                            <TextBlock x:Uid="1" />
                        </StackPanel>
                    </ListViewItem>

                    ...
</ListView>

MainPage.xaml.cs中

private async void Section_ItemClick(object sender, ItemClickEventArgs e)
    {
        ListViewItem itemId = ((sender as ListView).SelectedItem as ListViewItem);

        if (itemId != null)
        {
            .. do something ..
        }
        else
        {
            throw new Exception(this.resourceLoader.GetString("NavigationFailedExceptionMessage"));
        }
    }

编辑**

在进一步测试中，我发现事件触发时sender和e都为空？

Answer 1

好的，这解决了（最后）。使用SelectionChanged事件，并通过x:Name

为每个ListViewItem分配一个名称

MainPage.xaml中

<ListView 
                    x:Name="SettingsHub"
                    ReorderMode="Disabled"
                    SelectionChanged="SettingsHub_SelectionChanged"
                    ContinuumNavigationTransitionInfo.ExitElementContainer="True">
      ...
</ListView>

MainPage.xaml.cs中

private void SettingsHub_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        if (e.AddedItems.Count > 0)
        {
            var itemId = (e.AddedItems[0] as ListViewItem).Name;
        }            
    }

Answer 2

先展开ClickedItem。下列之一应该可以工作（我不确定哪一个会起作用，因为我现在没有安装Windows Phone SDK）：

var itemId = (e.ClickedItem as ListViewItem);
var itemId = (e.ClickedItem as Item);

然后检查null参考：

if (itemId != null && itemId.IsSelected)
{ }

另请查看ItemCLickEventArgs

的文档

Answer 3

这是我使用的mod

对于刚出现问题的listView。我在列表视图中存储rss feed urls，因此是方法名称。在代码中保持调试以提供帮助。

    private void RSSItem_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        System.Diagnostics.Debug.WriteLine(" CALLED ITEM CHANGED ");

        //ListViewItem itemId = ((sender as ListView).SelectedItem as ListViewItem);
        int count = e.AddedItems.Count;
        string  itemStr = e.AddedItems[0].ToString();

        System.Diagnostics.Debug.WriteLine(" DOWNLOADING FEED URL : " + itemStr);

    }

Answer 4

    private void DrivingHistoryListView_ItemClick(object sender, ItemClickEventArgs e)
    {
        var SelectedItem = (DrivingHistoryItem)e.ClickedItem;
        .....
    }

Answer 5

IDataReader ReadAll()
{
    var connection = new SqlConnection(connectionString);
    try
    {
        connection.Open();
        var command = connection.CreateCommand();
        command.CommandText = "SELECT * FROM mytable";
        var result = command.ExecuteReader(CommandBehavior.CloseConnection);
        connection = null; // Don't dispose the connection.
        return result;
    }
    finally
    {
        if (connection != null)
            connection.Dispose();
    }
}

如何获取单击的ListView项目

5 个答案:

这是我使用的mod