从其他Xaml文件绑定到Usercontrol中的元素 [英] Bind to element within Usercontrol from other Xaml file

问题描述

有人可以告诉我如何绑定到Usercontrol的元素吗?

Could anyone tell me how i can bind to a Element of a Usercontrol?

我正在尝试使用与IDataErrorInfo一起使用的数据触发器来禁用/启用按钮.

Im trying to disable/enable a button using a datatrigger working together with IDataErrorInfo.

所以当元素在同一视图上时，我通常会这样做

so i usually do this like this when the elements are on the same view

  <Button Name="AddEditButton" Content="{Binding ButtonContent}" Command="{Binding AddCustomerCommand}" HorizontalAlignment="Center"  Margin="0 10" >
        <Button.Style>
            <Style TargetType="{x:Type Button}">
                <Setter Property="IsEnabled" Value="false" />
                <Style.Triggers>
                    <MultiDataTrigger>
                        <MultiDataTrigger.Conditions>
                            <Condition Binding="{Binding ElementName=CustomerFirstNameTextBox, Path=(Validation.HasError)}" Value="false" />
                            <Condition Binding="{Binding ElementName=CustomerLastNameTextBox, Path=(Validation.HasError)}" Value="false" />
                            <Condition Binding="{Binding ElementName=CustomerEmailTextBox, Path=(Validation.HasError)}" Value="false" />
                            <Condition Binding="{Binding ElementName=CustomerPhoneTextBox, Path=(Validation.HasError)}" Value="false" />
                            <Condition Binding="{Binding ElementName=CustomerCellphoneTextBox, Path=(Validation.HasError)}" Value="false" />

                        </MultiDataTrigger.Conditions>
                        <Setter Property="IsEnabled" Value="true" />
                    </MultiDataTrigger>
                </Style.Triggers>
            </Style>
        </Button.Style>
    </Button>

但是现在我需要添加一个条件，该条件绑定到我的视图正在使用的Usercontrol(AdressControl)上的控件上.

But now i need to add a condition that binds to a control on a Usercontrol (AdressControl) that is being used by my view.

我希望像这样轻松地访问用户控件的元素

I was hoping to easily access the elements of the usercontrol like this

<Condition Binding="{Binding ElementName=AddressControl , Path=StreetTextBox.(Validation.HasError)}" Value="false"  />

但无济于事.任何帮助将不胜感激

but to no avail. Any help would be much appreciated

推荐答案

FindAncestor应该正确解析属性

  <Condition Binding="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type AddressControl}}, Path=StreetTextBox.(Validation.HasError)}" Value="false"  />

这会在可视化树中进行搜索，以查找类型AddressControl并解析该属性.

This bacially searches back though the visual tree looking for type AddressControl and resolves the property.

这篇关于从其他Xaml文件绑定到Usercontrol中的元素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IT屋！