尝试在xaml中重用对象的路径

时间:2013-03-08 14:27:46

标签: xaml path

我在xaml文件中有几个项目要绑定到不同的对象。我用两个按钮显示了一个例子:

<Button Content="Edit Operators" 
Command="{Binding ElementName=treeRevisions,
Path=SelectedItem.WorkOrderRev.Operators.EditCommand}" CommandParameter="" />
<Button Content="Edit MyData" 
Command="{Binding ElementName=treeRevisions,
Path=SelectedItem.WorkOrderRev.MyData.EditCommand}" CommandParameter="" />

如您所见,两个按钮的文本“Binding ElementName = treeRevisions,Path = SelectedItem.WorkOrderRev”是相同的。它工作,我可以像这样使用它,但我也有很多其他控件。有什么方法可以缩短这个,只需附加“。Operators.EditCommand”等?我到处寻找解决方案,但我没有找到任何东西。

2 个答案:

答案 0 :(得分:0)

有几种方法可以做到这一点。我会给你一个非常棘手的帖子。 警告这对于wpf pro来说是一个疯狂的答案,但它确实有效。哈哈哈...

        public MainWindow()
        {
            InitializeComponent();
            this.DataContext = new { D = "Hello" };
        }

        public static bool GetDoMyBinding(DependencyObject obj)
        {
            return (bool)obj.GetValue(DoMyBindingProperty);
        }

        public static void SetDoMyBinding(DependencyObject obj, bool value)
        {
            obj.SetValue(DoMyBindingProperty, value);
        }

        // Using a DependencyProperty as the backing store for DoMyBinding.  This enables animation, styling, binding, etc...
        public static readonly DependencyProperty DoMyBindingProperty =
            DependencyProperty.RegisterAttached("DoMyBinding", typeof(bool),  typeof(MainWindow), new PropertyMetadata(false, new PropertyChangedCallback(OnDoMyBindingChanged)));

        private static void OnDoMyBindingChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            Binding binding = new Binding("D");
            binding.Mode = BindingMode.OneWay;
            if (d is Button)
            {
                Button b = d as Button;
                b.SetBinding(Button.ContentProperty, binding);
            }
            if (d is TextBlock)
            {
                TextBlock tb = d as TextBlock;
                tb.SetBinding(TextBlock.TextProperty, binding);
            }
        }

你的XAML看起来像这样:

    <Window x:Class="BindingTest.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525"
        xmlns:local="clr-namespace:BindingTest">
    <StackPanel>
        <Button local:MainWindow.DoMyBinding="True"/>
        <Button  local:MainWindow.DoMyBinding="True"/>
        <TextBlock  local:MainWindow.DoMyBinding="True" />
    </StackPanel>
    </Window>

结果将是这样的:

enter image description here

已编辑:相反为True,您可以放置​​自定义字符串,例如“.Operators.EditCommand”,但您需要更改逻辑。

玩得开心。

答案 1 :(得分:0)

我测试了一些不同的解决方案,发现了一个非常简单 我在周围的网格上设置DataContext,如下所示:

    <Grid DataContext="{Binding ElementName=treeRevisions, Path=SelectedItem.WorkOrderRev.PrintData}">

然后我可以使用这样的缩写:

    <TextBox Height="23" HorizontalAlignment="Left" Margin="103,63,0,0" Name="txtDescription" VerticalAlignment="Top" Width="120" 
     IsEnabled="{Binding Path=UnLocked, UpdateSourceTrigger=PropertyChanged, Mode=OneWay}"
     IsReadOnly="{Binding Path=Locked, UpdateSourceTrigger=PropertyChanged, Mode=OneWay}"
     Text="{Binding Path=TableData.Rows[0][description], UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}"
     />

其中Locked,UnLocked和TableData是SelectedItem.WorkOrderRev.PrintData的属性。