Question

所以我有这个Window课程：

public partial class WorkerCard : Window
{
    public string jobsPath;
    public List<Job> List { get; set; }

    public WorkerCard()
    {
        InitializeComponent();

        Worker w = new Worker
        {
            Num = 1,
            Id = 123456789,
            Name = "ישראל",
            Last = "ישראלי",
            City = "",
            WorkStart = new DateTime(2015, 10, 1),
            WorkEnd = new DateTime(2017, 1, 1),
            Job = new Job
            {
                Name = "",
                Rate = 0,
                Global = 0
            },
            Rides = 0,
            Ride = false
        };
        this.DataContext = w;

        string path = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) + "\\ShalomCollege\\";
        Job[] jobs = new JavaScriptSerializer().Deserialize<Job[]>(File.ReadAllText(path + "jobs.json"));
        List = jobs.OfType<Job>().ToList();
    }
}

我想将Worker对象绑定到我所做的某些TextBox es，但后来我需要绑定List（或数组）的Job个对象到ComboBox。似乎没什么用。

XAML（将ComboBox分开）：

<Window x:Class="ShalomColl.WorkerCard"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:local="clr-namespace:ShalomColl"
    mc:Ignorable="d"
    Title="WorkerCard" Height="350" Width="350">
<Window.Resources>
    <Style x:Key="IsZero" TargetType="{x:Type TextBox}">
        <Style.Triggers>
            <DataTrigger Binding="{Binding Job.Rate}" Value="0">
                <Setter Property="IsEnabled" Value="False" />
            </DataTrigger>
        </Style.Triggers>
    </Style>
</Window.Resources>
<Grid FlowDirection="RightToLeft">
    <StackPanel x:Name="stackPanel">
        <DockPanel LastChildFill="True">
            <Label DockPanel.Dock="Left" Content="ת.ז:" />
            <TextBox Text="{Binding Id}" MaxLength="9" />
        </DockPanel>
        <DockPanel LastChildFill="True">
            <Label DockPanel.Dock="Left" Content="שם פרטי:" />
            <TextBox Text="{Binding Name}" />
        </DockPanel>
        <DockPanel LastChildFill="True">
            <Label DockPanel.Dock="Left" Content="שם משפחה:" />
            <TextBox Text="{Binding Last}" />
        </DockPanel>
        <DockPanel LastChildFill="True">
            <Label DockPanel.Dock="Left" Content="תחילת עבודה:" />
            <DatePicker Text="{Binding WorkStart}" />
        </DockPanel>
        <DockPanel LastChildFill="True">
            <Label DockPanel.Dock="Left" Content="סיום עבודה:" />
            <DatePicker Text="{Binding WorkEnd}" />

        <DockPanel LastChildFill="True">
            <Label DockPanel.Dock="Left" Content="תפקיד:" />
            <ComboBox ItemsSource="{Binding List}" />
        </DockPanel>

        <DockPanel LastChildFill="True">
            <Label DockPanel.Dock="Left" Content="יישוב:" />
            <ComboBox x:Name="City" />
        </DockPanel>
        <DockPanel LastChildFill="True">
            <Label DockPanel.Dock="Left" Content="תעריף לשעה:" />
            <TextBox Text="{Binding Job.Rate}" Style="{StaticResource IsZero}" />
        </DockPanel>
        <DockPanel LastChildFill="True">
            <Label DockPanel.Dock="Left" Content="משכורת גלובאלית:" />
            <TextBox Text="{Binding Job.Global}" Style="{StaticResource IsZero}" />
        </DockPanel>
        <DockPanel LastChildFill="True">
            <CheckBox x:Name="chkBox" VerticalAlignment="Center" DockPanel.Dock="Left" IsChecked="{Binding Ride}" />
            <Label DockPanel.Dock="Left" Content="נסיעות:" />
            <TextBox Text="{Binding Rides}" IsEnabled="{Binding ElementName=chkBox, Path=IsChecked}" />
        </DockPanel>
    </StackPanel>
    <Button Content="שלח" HorizontalAlignment="Center" VerticalAlignment="Bottom" Margin="0,0,0,20" Width="70" Click="Submit" />
</Grid>

修改
找到了某种解决方案，但我仍然没有得到它的工作原理。我刚将List转移到Worker对象中。我认为问题出在DataContext，因为我一次只能设置一个（目前位于Worker）。
仍在寻找答案......

Answer 1

您已将视图的DataContext设置为Worker的实例，但您的List属性位于视图中。

您可以使用RelativeSource指向该绑定的视图。

<ComboBox ItemsSource="{Binding List, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=Window}}" />

如果您在窗口上输入名称，请ElementName：

<ComboBox ItemsSource="{Binding List, ElementName=root" />

如果您遇到绑定问题，请查看您的DevStudio输出窗口，因为绑定错误会显示在那里，并且通常会给您一个关于出错的线索。

WPF将List <t>绑定到ComboBox

1 个答案: