c# - Button Click to get an Object on SelectionChanged 事件

Question

我有一个 SelectionChanged 事件并且工作得很好，但我想弄清楚如何在单击按钮时“捕获”这个选定的项目，他们需要将它作为参数传递给另一个页面，并且编辑此项目。这是我仍然实现的当前代码和按钮 SelectionChanged，因为这是我需要的。

private void listCarros_SelectionChanged(object sender, System.Windows.Controls.SelectionChangedEventArgs e)
    {
        ListBox listBox = sender as ListBox;

        if (listBox != null && listBox.SelectedItem != null)
        {
            //pega o Carro que foi selecionado
            Carro sCar = (Carro)listBox.SelectedItem;

            btnEditCar.IsEnabled = true;
            btnDeleteCar.IsEnabled = true;
        }
        else
        {
            btnEditCar.IsEnabled = false;
            btnDeleteCar.IsEnabled = false;
        }
    }

我需要编辑这个按钮上的 selectedItem:

private void btnEditCar_Click(object sender, EventArgs e)
{
    //Here I need access to the selectedItem on SelectionChanged event.  
}

如果你也能告诉我如何将对象作为参数传递就完美了。

Answer 1

You can do this with binding also

1.Bind ListBoxItem(Carro Object) to the tag of "btnEditCar" in xaml.

Xaml should be like this

<Button Name="btnEditCar" OnClick="btnEditCar_Click" Tag="{Binding}"/>

现在在

private void btnEditCar_Click(object sender, EventArgs e)
{
    Carro sCar=(Carro)((sender as FrameworkElement).Tag)
}

这是很好的做法，只为临时目的创建一个类变量是 hack