WPF绑定中的默认值

Question

我已经绑定的Height和Width我的窗口.现在,Visual Studio中的窗口非常小,我无法继续使用它.设置默认值Height,并Width会解决我的问题.有可能Binding吗？

<Window
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    x:Class="Sth.MainWindow"
    x:Name="Window"
    Width="{Binding Path=WidthOfImage, Mode=TwoWay}"
    Height="{Binding Path=HeightOfImage, Mode=TwoWay}"
    >
    ...
</Window>

我们可以在WPF中设置默认值Binding吗？怎么样？

Answer 1

见FallbackValue:

<Window
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    x:Class="Sth.MainWindow"
    x:Name="Window"
    Width="{Binding Path=WidthOfImage, Mode=TwoWay, FallbackValue=200}"
    Height="{Binding Path=HeightOfImage, Mode=TwoWay, FallbackValue=150}"
    >
    ...
</Window>

您也可以使用MinWidth或MinHeight解决小窗口问题.