以下代码用于绑定 ListView，但对 ListView 的任何更改都不会返回到内存中的数据结构。当我有标准绑定时，它可以双向工作，但不能使用多重绑定。我需要使用多重绑定来获取转换器中使用的 StringFormat 属性。
您能否让我知道一种方法来调用转换器的“ConvertBack”方法？
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:DataFlowControls">
<local:ValueToFormatedValueConverter x:Key="valueToFormatedValueConverter" />
<Style TargetType="{x:Type local:DfcEditTextBox}">
<Setter Property="Margin" Value="-6, 0, -6, 0" />
<Setter Property="FocusVisualStyle" Value="{x:Null}"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type local:DfcEditTextBox}">
<TextBlock x:Name="PART_TextBlock" Padding="2, 0, 0, 0">
<TextBlock.Text>
<MultiBinding Converter="{StaticResource valueToFormatedValueConverter}">
<Binding RelativeSource="{RelativeSource TemplatedParent}" Path="Value" Mode="TwoWay" UpdateSourceTrigger="PropertyChanged"/>
<Binding RelativeSource="{RelativeSource TemplatedParent}" Path="StringFormat" Mode="TwoWay" UpdateSourceTrigger="PropertyChanged"/>
</MultiBinding>
</TextBlock.Text>
</TextBlock>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ResourceDictionary>
<!--Text="{Binding Path=Value, Mode=TwoWay, Converter={StaticResource valueToFormatedValueConverter}, RelativeSource={RelativeSource TemplatedParent}}" />-->
<Window x:Class="DataFlowControls.Show.DfcListView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:dfc="clr-namespace:DataFlowControls;assembly=DataFlowControls"
xmlns:local="clr-namespace:DataFlowControls.Show"
Title="DfcListView" Height="400" Width="500">
<Grid>
<StackPanel>
<dfc:DfcListView Name="lvTradesCollection" ItemsSource="{Binding Path=TradesCollection}" KeyboardNavigation.DirectionalNavigation="Continue" >
<ListView.ItemContainerStyle>
<Style TargetType="ListViewItem">
<Setter Property="HorizontalContentAlignment" Value="Stretch" />
</Style>
</ListView.ItemContainerStyle>
<ListView.Resources>
<DataTemplate x:Key="Date_DataTemplate">
<dfc:DfcEditTextBox Value="{Binding Path=Date, Mode=Twoway, UpdateSourceTrigger=PropertyChanged}" StringFormat='{}{0:dd/MM/yyyy}' HorizontalContentAlignment="Left" IsEditable="true" />
</DataTemplate>
<DataTemplate x:Key="Asset_DataTemplate">
<dfc:DfcEditTextBox Value="{Binding Path=Asset, Mode=Twoway, UpdateSourceTrigger=PropertyChanged}" HorizontalContentAlignment="Left" IsEditable="true" />
</DataTemplate>
<DataTemplate x:Key="Lots_DataTemplate">
<dfc:DfcEditTextBox Value="{Binding Path=Lots, Mode=Twoway, UpdateSourceTrigger=PropertyChanged}" StringFormat='N0' HorizontalContentAlignment="Center" IsEditable="true" />
</DataTemplate>
<DataTemplate x:Key="Price_DataTemplate">
<dfc:DfcEditTextBox Value="{Binding Path=Price, Mode=Twoway, UpdateSourceTrigger=PropertyChanged}" StringFormat='N2' HorizontalContentAlignment="Center" IsEditable="true" />
</DataTemplate>
<DataTemplate x:Key="IsCheap_DataTemplate">
<dfc:DfcEditCheckBox Value="{Binding Path=IsCheap, Mode=Twoway, UpdateSourceTrigger=PropertyChanged}" HorizontalAlignment="Center" IsEditable="true" />
</DataTemplate>
<DataTemplate x:Key="NextTrade_DataTemplate">
<dfc:DfcEditComboBox Value="{Binding Path=NextTrade, Mode=Twoway, UpdateSourceTrigger=PropertyChanged}" ItemsSource="{x:Static local:DfcListView.NextTradeTypes}" IsEditable="true" />
</DataTemplate>
</ListView.Resources>
<ListView.View>
<dfc:DfcGridView>
<dfc:DfcGridViewColumn Header="Date" Width="140" CellTemplate="{StaticResource Date_DataTemplate}" />
<dfc:DfcGridViewColumn Header="Asset" Width="40" CellTemplate="{StaticResource Asset_DataTemplate}" />
<dfc:DfcGridViewColumn Header="Lots" Width="40" CellTemplate="{StaticResource Lots_DataTemplate}" />
<dfc:DfcGridViewColumn Header="Price" Width="50" CellTemplate="{StaticResource Price_DataTemplate}" />
<dfc:DfcGridViewColumn Header="IsCheap" Width="60" CellTemplate="{StaticResource IsCheap_DataTemplate}" />
<dfc:DfcGridViewColumn Header="NextTrade" Width="80" CellTemplate="{StaticResource NextTrade_DataTemplate}" />
</dfc:DfcGridView>
</ListView.View>
</dfc:DfcListView>
<Button Content="Add Row" HorizontalAlignment="Left" Margin="5,5,5,5" Click="AddRow_Click"/>
<Button Content="Update Row" HorizontalAlignment="Left" Margin="5,5,5,5" Click="UpdateRow_Click"/>
</StackPanel>
</Grid>
</Window>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Data;
using System.Globalization;
using System.Windows;
namespace DataFlowControls
{
public class ValueToFormatedValueConverter : IMultiValueConverter
{
public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
{
object valueObject = values[0];
string stringFormat = (string)values[1];
if (stringFormat == null)
{
return valueObject.ToString();
}
if (stringFormat.Substring(0, 1) == "N")
{
int intValue;
if (Int32.TryParse(valueObject.ToString(), out intValue))
{
return (intValue * 100).ToString(stringFormat);
}
double doubleValue;
if (Double.TryParse(valueObject.ToString(), out doubleValue))
{
return doubleValue.ToString(stringFormat);
}
decimal decimalValue;
if (Decimal.TryParse(valueObject.ToString(), out decimalValue))
{
return decimalValue.ToString(stringFormat);
}
}
if (stringFormat == "{0:dd/MM/yyyy}")
{
return ((DateTime)valueObject).ToShortDateString();
}
throw new NotImplementedException();
}
public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
{
return Enumerable.Repeat(value, targetTypes.Length).ToArray();
}
}
}