WPF Binding FallbackValue设置为Binding

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WPF Binding FallbackValue设置为Binding

本文介绍了WPF Binding FallbackValue设置为Binding的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

限时删除！！

我正在尝试这样做：

 < Label Content ={Binding SelectedItem.Name，ElementName = groupTreeView，
 FallbackValue = {Binding RootGroup.Name}}/>

如果任何人有另一个把戏把它拉下来，那将是很棒的。

解决方案

你正在寻找的东西叫PriorityBinding（＃6 on 列表）

（来自文章）

例如

 < TextBox> 
< TextBox.Text> 
< PriorityBinding> 
< Binding Path =LastNameNonExistantIsAsync =True/> 
< Binding Path =FirstNameIsAsync =True/> 
< / PriorityBinding> 
< /TextBox.Text> 
< / TextBox>

Is there a way to have another binding as a fallback value?

I'm trying to do something like this:

<Label Content="{Binding SelectedItem.Name, ElementName=groupTreeView,
                         FallbackValue={Binding RootGroup.Name}}" />

If anyone's got another trick to pull it off, that would be great.

解决方案

What you are looking for is something called PriorityBinding (#6 on this list)

(from the article)

e.g.

<TextBox>
    <TextBox.Text>
        <PriorityBinding>
            <Binding Path="LastNameNonExistant" IsAsync="True" />
            <Binding Path="FirstName" IsAsync="True" />
        </PriorityBinding>
    </TextBox.Text>
</TextBox>

这篇关于WPF Binding FallbackValue设置为Binding的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！

1403页，肝出来的..

09-07 01:30