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Der folgende Code funktioniert, um die ListView zu binden, aber alle Änderungen an der ListView gehen nicht zurück in die Datenstruktur im Speicher. Es funktioniert in beide Richtungen, wenn ich eine Standardbindung hatte, aber nicht mit einer Mehrfachbindung. Ich muss ein Multibinding verwenden, um die im Konverter verwendete StringFormat-Eigenschaft zu erhalten.WPF MultiBinding TextBlock.Text
Könnten Sie mir bitte einen Weg geben, wie man die 'ConvertBack'-Methode des Konverters aufrufen kann?
<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();
}
}
}