c# - 在运行时创建的ComboBox将不会显示Windows Phone 8.1

我需要在运行时创建一个包含人员姓名的组合框，并使用数据数组填充该组合框，并将其开口绑定到一个按钮。
即使设置了高度，它也不会打开。它在XAML文件中不存在，必须由运行时创建。

每当我调试Height时，它总是设置为0；

ComboBox peopleComboBox = new ComboBox();
List <Person> people; //it's initialized elsewhere
private void btnLoadPeopleName_Click(object sender, RoutedEventArgs e)
    {

        peopleComboBox.IsEnabled = true;
        peopleComboBox.Height = 1280; //I wanted to set it Auto with double.NaN but it won't open. Always set to 0 during debugging.

        peopleComboBox.ItemsSource = people;
        peopleComboBox.DisplayMemberPath = "first_name";
        peopleComboBox.SelectedIndex = 0;

        peopleComboBox .SelectionChanged +=peopleComboBox_SelectionChanged;

        peopleComboBox.Visibility = Visibility.Visible;
        peopleComboBox.IsDropDownOpen = true; //this should open it, right?
    }

我究竟做错了什么？

最佳答案

就像@ChrisF评论一样，您是否要将此comboBox添加到视图中？如果没有，则将其添加到父容器组件。
gridComponent.Children.Add(yourComboBox)

至于Height，您正在做什么是正确的。

关于c# - 在运行时创建的ComboBox将不会显示Windows Phone 8.1，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/34841396/