wpf 绑定到后面代码中的相对源
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Binding to a relativesource in the code behind
提问by Dave
In my UserControl, I have the following code in my XAML
在我的 UserControl 中，我的 XAML 中有以下代码
<TextBlock Grid.Row="2" Text="{Binding Path=StartTime,
RelativeSource={RelativeSource Mode=FindAncestor,
AncestorLevel=1, AncestorType=Window}}" />
This simply gets the value of a property from the parent window and it works great.
这只是从父窗口获取属性的值，并且效果很好。
How can I do this in the code behind?
我怎样才能在后面的代码中做到这一点？
Binding b = new Binding();
b.RelativeSource = new RelativeSource(RelativeSourceMode.FindAncestor,
typeof(Window), 1);
b.Path = "StartTime";
myProperty = b.value;// obviously there is no b.value but this
// is what I'm trying to achieve.
//BindingOperations.SetBinding(StartTime, StartTimeProperty, b);
//This does not work sadly, it can't convert string to DependancyObject
回答by Rohit Vats
Give x:Nameto your TextBlock -
给x:Name你的 TextBlock -
then you can do that in code behind like this -
那么你可以像这样在后面的代码中做到这一点 -
Binding b = new Binding("StartTime");
b.RelativeSource = new RelativeSource(RelativeSourceMode.FindAncestor,
typeof(Window), 1);
textBlock.SetBinding(TextBlock.TextProperty, b);
回答by gehho
You should try BindingOperations.SetBinding. This should work something like this:
你应该试试BindingOperations.SetBinding。这应该是这样的：
BindingOperations.SetBinding(this, myProperty, b);
(assuming that thisis a DependencyObjectand myPropertyis the DependencyProperty.
（假设这this是一个DependencyObject并且myProperty是 DependencyProperty。
