为什么TargetedTriggerAction的TargetObject始终为null

Question

我有三个按钮（1.Male，2.Femal，3.OK），我想通过点击男性按钮或<来更改按钮的CommandParameters属性（确定） strong> FeMale按钮。我发现问题Setting a property with an EventTrigger对我很有帮助，但TargetObject函数TargetedTriggerAction<FrameworkElement> void Invoke(object parameter){...}始终为null，为什么？

我该如何解决问题？

输出窗口中的错误信息。

System.Windows.Data Error: 4 : Cannot find source for binding with reference 'ElementName=OKGenderButton'. BindingExpression:(no path); DataItem=null; target element is 'SetterAction' (HashCode=20203785); target property is 'TargetObject' (type 'Object')

Answer 1

如错误所示，bindingExpression没有路径。尝试添加路径

{Binding Path=OKGenderButton }

Answer 2

正如ElementName Binding is failing提到的问题

代码Source={x:Reference DisplayMarkers}有效

演示代码：

<Button Grid.Row="2" Grid.Column="1"
                        Content="FeMale"
                        Margin="0 0 90 0"
                        VerticalAlignment="Bottom"
                        HorizontalAlignment="Right"
                        Width="93"
                        Height="93"
                        Style="{DynamicResource FemaleButton}">
                    <i:Interaction.Triggers>
                        <i:EventTrigger EventName="Click">
                            <triggerActions:SetterAction PropertyName="CommandParameter"
                                                         TargetObject="{x:Reference OKGenderButton}"
                                                         Value="{x:Static constants:Genders.FeMale}" />

                        </i:EventTrigger>
                    </i:Interaction.Triggers>
                </Button>