NumericUpDown值绑定

Question

我有个问题。如何将ItemsSource属性绑定到NumericUpDown？这样就行不通了。谢谢！

<DataGrid ItemsSource="{Binding Articles}">
    <DataGrid.Columns>
            <DataGridTemplateColumn MinWidth="100"
                                Header="Amount"
                                MaxWidth="{Binding MinWidth, RelativeSource={RelativeSource Self}}">
            <DataGridTemplateColumn.CellTemplate>
                <DataTemplate>
                    <mahApps:NumericUpDown Value="{Binding Amount, UpdateSourceTrigger=PropertyChanged, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type DataGrid}}}">
                        <i:Interaction.Triggers>
                            <i:EventTrigger EventName="ValueChanged">
                                <i:InvokeCommandAction CommandParameter="{Binding}"
                                                       Command="{Binding DataContext.RefreshValuesCommand, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type DataGrid}}}" />
                            </i:EventTrigger>
                        </i:Interaction.Triggers>
                    </mahApps:NumericUpDown>
                </DataTemplate>
            </DataGridTemplateColumn.CellTemplate>
        </DataGridTemplateColumn>
    </DataGrid.Columns>
</DataGrid>

编辑

第一:悬臂(西班牙语)=金额(英文)

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Answer 1

如果Amount属性是在文章属性相同的类中定义的，则应该绑定到DataContext (DataContext.Amount)的DataGrid：

<mahApps:NumericUpDown Value="{Binding DataContext.Amount, UpdateSourceTrigger=PropertyChanged, 
    RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type DataGrid}}}">
    <i:Interaction.Triggers>
        <i:EventTrigger EventName="ValueChanged">
            <i:InvokeCommandAction CommandParameter="{Binding}"
                                   Command="{Binding DataContext.RefreshValuesCommand, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type DataGrid}}}" />
        </i:EventTrigger>
    </i:Interaction.Triggers>
</mahApps:NumericUpDown>

如果在数据对象(项目或您所称的任何内容)类中定义了Amount属性，那么它就是：

<mahApps:NumericUpDown Value="{Binding Amount}">

编辑：您还应该设置绑定到PropertyChanged的UpdateSourceTrigger：

<mahApps:NumericUpDown Value="{Binding Amount, UpdateSourceTrigger=PropertyChanged}" />