在运行时创建的 ComboBox 不会显示 Windows Phone 8.1

Question

我需要在运行时创建一个包含人名的组合框，用数据数组填充它，并将其开口绑定到一个按钮。即使我设置了高度，它也不会打开。它不存在于 XAML 文件中，它必须由运行时创建。

每当我调试高度时，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?
    }

我做错了什么？

Answer 1

就像@ChrisF 评论一样，您是否将此组合框添加到您的视图中？如果不将其添加到父 Container 组件。 gridComponent.Children.Add(yourComboBox)

至于Height你做的是对的。

在运行时创建的 ComboBox 不会显示 Windows Phone 8.1

ComboBox created in runtime won't show Windows Phone 8.1

c#

wpf

combobox

windows-phone-8.1