Question

如何根据运行时的值更改XAML文本框的背景颜色？最终用户可以自定义这些颜色值。似乎我不能只设置“背景”属性。

    <TextBox Name="nameInput" Width="300" HorizontalAlignment="Left" />

背后的代码如何实现这一目标？这不起作用：

Private Sub NameInput_TextChanged(sender As Object, e As TextChangedEventArgs) Handles nameInput.TextChanged

    Select Case nameInput.Text
        Case "x"
            nameInput.Background = "Red"
        Case "y"
            nameInput.Background = "Green"
    End Select
End Sub

Answer 1

您需要指定SolidColorBrush而非Color。

Private Sub NameInput_TextChanged(sender As Object, e As TextChangedEventArgs) Handles nameInput.TextChanged

Select Case nameInput.Text
    Case "x"
        nameInput.Background = new SolidColorBrush(Windows.UI.Colors.Red);
    Case "y"
        nameInput.Background = new SolidColorBrush(Windows.UI.Colors.Green);
End Select
End Sub

在运行时更改Windows 8 XAML TextBox上的背景

1 个答案: