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我有一个集合，我在 ListView 中表示它，它按 OrderID 和 Expander 分组。

在 Expander Header 中，我显示了 OrderID 以及一个 Invoice TextBox。在实际的 ListView.View 中，我显示了 CustomerName、OrderID 和一个 Invoice TextBox。因此，每一行数据都有自己的发票文本框，每个分组标题都有一个发票文本框。

当我在 Group Header Invoice TextBox 中输入一个值时，它会自动更新它的成员 Invoice TextBoxes。但个别行不会更新分组发票文本框。

截屏

从图像中可以看出（这描述得更好）

现在，当用户单击“处理选定项目”按钮时，我希望能够使用 TextBoxes 中的 InvoiceID 更新集合。所以不知何故，我需要将分组的行链接到 Collection 以及 GroupHeader 行。这可能吗？

这是代码：WPF

<UserControl x:Class="TestGrouping.MainWindowView"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
     Height="350" Width="525"
     xmlns:cal="http://www.caliburnproject.org">

<UserControl.Resources>
    <CollectionViewSource x:Key='src' Source="{Binding NewOrders}">
        <CollectionViewSource.GroupDescriptions>
            <PropertyGroupDescription PropertyName="OrderID" />
        </CollectionViewSource.GroupDescriptions>
    </CollectionViewSource>
    <CollectionViewSource x:Key="OrderGroup" Source="{Binding Path=NewOrders}" />

    <Style x:Key="CustomListViewItemStyle" TargetType="{x:Type ListViewItem}">
        <Style.Triggers>
            <Trigger Property="ItemsControl.AlternationIndex" Value="0">
                <Setter Property="Background" Value="#f6f2f2"></Setter>
            </Trigger>
        </Style.Triggers>
    </Style>
</UserControl.Resources>

<Grid x:Name="LayoutRoot" ShowGridLines="False" >


    <Grid.RowDefinitions>
        <RowDefinition Height="Auto" />
        <RowDefinition Height="Auto" />

    </Grid.RowDefinitions>
    <Button Grid.Column="0" Grid.Row="0" x:Name="ProcessItems" Content="Process Selected Items" HorizontalAlignment="Left" MinWidth="80" cal:Message.Attach="ProcessItems($datacontext)"/>

    <ListView ItemsSource="{Binding Source={StaticResource src}}" BorderThickness="1" Grid.Column="0" Grid.Row="1" Height="580">
        <ListView.GroupStyle>
            <GroupStyle>
                <GroupStyle.ContainerStyle>
                    <Style TargetType="{x:Type GroupItem}">
                        <Setter Property="Margin" Value="0,0,0,5"/>
                        <Setter Property="Template">
                            <Setter.Value>
                                <ControlTemplate TargetType="{x:Type GroupItem}">
                                    <Expander IsExpanded="{Binding Mode=TwoWay, Path=IsSelected, RelativeSource={RelativeSource AncestorType=ListBoxItem, Mode=FindAncestor}}" BorderBrush="#FFA4B97F" BorderThickness="1,1,1,1" >
                                        <Expander.Header>
                                            <DockPanel>
                                                <TextBlock FontWeight="Bold" Text="OrderID : "  Margin="5,0,0,0" />
                                                <TextBlock FontWeight="Bold" Text="{Binding Path=Name}"  Margin="5,0,0,0" Width="100"/>
                                                <TextBlock FontWeight="Bold" Text="Count : "  Margin="5,0,0,0" />
                                                <TextBlock FontWeight="Bold"  Text="{Binding Path=ItemCount}" Margin="5,0,0,0" Width="100"/>
                                                <TextBlock FontWeight="Bold"  Text="InvoiceID : " Margin="5,0,0,0" />
                                                <TextBox x:Name="GroupInvoiceID" Margin="5,0,0,0" Width="100" BorderThickness="1" BorderBrush="#FFA4C5E8" />
                                            </DockPanel>
                                        </Expander.Header>
                                        <Expander.Content>
                                            <ItemsPresenter />
                                        </Expander.Content>
                                    </Expander>
                                </ControlTemplate>
                            </Setter.Value>
                        </Setter>
                    </Style>
                </GroupStyle.ContainerStyle>
            </GroupStyle>
        </ListView.GroupStyle>

        <ListView.View>
            <GridView AllowsColumnReorder="False" x:Name="GridView1">
                <GridViewColumn Header="Customer Name" DisplayMemberBinding="{Binding Path=Customer}" ></GridViewColumn>
                <GridViewColumn Header="Order ID" DisplayMemberBinding="{Binding Path=OrderID}" ></GridViewColumn>
                <GridViewColumn Header="Invoice ID">
                    <GridViewColumn.CellTemplate>
                        <DataTemplate>
                            <TextBox x:Name="InvoiceID" HorizontalAlignment="Stretch" Width="100" Text="{Binding ElementName=GroupInvoiceID, Path=Text, Mode=OneWay, UpdateSourceTrigger=PropertyChanged}" BorderThickness="1" BorderBrush="#FFA4C5E8" />
                        </DataTemplate>
                    </GridViewColumn.CellTemplate>
                </GridViewColumn>

            </GridView>
        </ListView.View>

    </ListView>


</Grid>

这是代码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Caliburn.Micro;
using System.Collections.ObjectModel;
using System.Windows;

namespace TestGrouping
{
public class MainWindowViewModel : Conductor<object>
{

    public MainWindowViewModel() {

        List<OrderViewModel> all = new List<OrderViewModel>();
        OrderViewModel ovm = new OrderViewModel();
        ovm.ID = 1;
        ovm.Customer = "cust1";
        ovm.OrderID = "0001";
        all.Add(ovm);
        ovm = new OrderViewModel();
        ovm.ID = 2;
        ovm.Customer = "cust2";
        ovm.OrderID = "0001";
        all.Add(ovm);
        ovm = new OrderViewModel();
        ovm.ID = 3;
        ovm.Customer = "cust3";
        ovm.OrderID = "0002";
        all.Add(ovm);
        ovm = new OrderViewModel();
        ovm.ID = 4;
        ovm.Customer = "cust3";
        ovm.OrderID = "0003";
        all.Add(ovm);

        this.NewOrders = new ObservableCollection<OrderViewModel>(all);
        this.NotifyOfPropertyChange(() => this.NewOrders);
    }

    public ObservableCollection<OrderViewModel> NewOrders { get; private set; }

    public void ProcessItems(object obj)
    {

    }

}


public class OrderViewModel 
{
    public OrderViewModel()
    {

    }

    int _ID;
    public int ID
    {
        get { return _ID; }
        set
        {
            if (value == _ID)
                return;

            _ID = value;

        }
    }

    string _Customer;
    public string Customer
    {
        get { return _Customer; }
        set
        {
            if (value == _Customer)
                return;

            _Customer = value;

        }
    }


    string _OrderID;
    public string OrderID
    {
        get { return _OrderID; }
        set
        {
            if (value == _OrderID)
                return;

            _OrderID = value;
        }
    }

    string _InvoiceNumber;
    public string InvoiceNumber
    {
        get { return _InvoiceNumber; }
        set
        {
            if (value == _InvoiceNumber)
                return;

            _InvoiceNumber = value;
        }
    }

}

}

我知道这很长，但我试图提供尽可能多的信息。任何帮助都会很棒，或者任何指向正确方向的指针。如果我错过了任何信息，请大声喊叫。

4

1 回答 1

0

我已经设法解决了这个问题 - 可能不是最优雅的，但我认为它有效。

我向项目 TextBox 添加了一个 Change 事件，它将更新集合。所以我的 Listview.View 现在如下：

<ListView.View>
            <GridView AllowsColumnReorder="False" x:Name="GridView1">
                <GridViewColumn Header="Customer Name" DisplayMemberBinding="{Binding Path=Customer}" ></GridViewColumn>
                <GridViewColumn Header="Order ID" DisplayMemberBinding="{Binding Path=OrderID}" ></GridViewColumn>
                <GridViewColumn Header="Invoice ID">
                    <GridViewColumn.CellTemplate>
                        <DataTemplate>
                            <TextBox x:Name="InvoiceID" HorizontalAlignment="Stretch" Width="100" Text="{Binding ElementName=GroupInvoiceID, Path=Text, Mode=OneWay, UpdateSourceTrigger=PropertyChanged}" BorderThickness="1" BorderBrush="#FFA4C5E8" 
                                     cal:Message.Attach="[Event TextChanged]=[Action InvoiceID_TextChanged($datacontext, $eventArgs)]" />
                        </DataTemplate>
                    </GridViewColumn.CellTemplate>
                </GridViewColumn>

            </GridView>
        </ListView.View>

我将以下代码添加到 ModelView

public void InvoiceID_TextChanged(object obj, RoutedEventArgs e)
    {
        OrderViewModel ovm = obj as OrderViewModel;
        string invoiceIDText = (e.OriginalSource as TextBox).Text;
        foreach (OrderViewModel o in NewOrders)
        {
            if (o.ID == ovm.ID)
            {
                o.InvoiceNumber = invoiceIDText;
            }
        }
    }

这将使用正确的 InvoiceNumber 更新集合“NewOrders”。单击“处理项目”按钮后，集合已更新，现在可以保存到数据库中。

我希望这可以帮助别人。

于 2012-10-01T09:55:10.150 回答