アプリケーションに、クラスの 10 進数フィールドにデータ バインドされたテキスト ボックスがあり、バインド モードは双方向です。通貨の書式設定に StringFormat={0:c} を使用しています。
「UpdateSourceTrigger」に触れない限り、これは正常に機能します。UpdateSourceTrigger=PropertyChanged を設定すると、入力しているテキストの書式設定が停止します。
これが私のコード例です
Employee.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ComponentModel;
namespace Converter
{
public class Employee : INotifyPropertyChanged
{
int _employeeNumber;
string _firstName;
string _lastName;
string _department;
string _title;
decimal _salary;
public Employee()
{
_employeeNumber = 0;
_firstName =
_lastName =
_department =
_title = null;
}
public int EmployeeNumber
{
get { return _employeeNumber; }
set
{
_employeeNumber = value;
OnPropertyChanged("EmployeeNumber");
}
}
public string FirstName
{
get { return _firstName; }
set
{
_firstName = value;
OnPropertyChanged("FirstName");
}
}
public string LastName
{
get { return _lastName; }
set
{
_lastName = value;
OnPropertyChanged("LastName");
}
}
public string Department
{
get { return _department; }
set
{
_department = value;
OnPropertyChanged("Department");
}
}
public string Title
{
get { return _title + " salary: " + _salary.ToString(); }
set
{
_title = value;
OnPropertyChanged("Title");
}
}
public decimal Salary
{
get { return _salary; }
set
{
_salary = value;
OnPropertyChanged("Salary");
OnPropertyChanged("Title");
}
}
public override string ToString()
{
return String.Format("{0} {1} ({2})", FirstName, LastName, EmployeeNumber);
}
protected void OnPropertyChanged(string propertyName)
{
if (PropertyChanged != null)
{
PropertyChangedEventArgs args = new PropertyChangedEventArgs(propertyName);
this.PropertyChanged(this, args);
}
}
#region INotifyPropertyChanged Members
public event PropertyChangedEventHandler PropertyChanged;
#endregion
}
}
EmployeeList.cs:
using System.Collections.ObjectModel;
namespace Converter
{
public class EmployeeList : ObservableCollection<Employee>
{
}
}
Window1.xaml:
<Window x:Class="Converter.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:Converter"
Title="Window1" Height="500" Width="500">
<Window.Resources>
<local:EmployeeList x:Key="myEmployeeList">
<local:Employee EmployeeNumber="1" FirstName="John" LastName="Dow" Title="Accountant" Department="Payroll" Salary="25000.00" />
<local:Employee EmployeeNumber="2" FirstName="Jane" LastName="Austin" Title="Account Executive" Department="Customer Management" Salary="25000.00" />
<local:Employee EmployeeNumber="3" FirstName="Ralph" LastName="Emmerson" Title="QA Manager" Department="Product Development" Salary="25000.00" />
<local:Employee EmployeeNumber="4" FirstName="Patrick" LastName="Fitzgerald" Title="QA Manager" Department="Product Development" Salary="25000.00" />
<local:Employee EmployeeNumber="5" FirstName="Charles" LastName="Dickens" Title="QA Manager" Department="Product Development" Salary="25000.00" />
</local:EmployeeList>
<local:StringToDecimalCurrencyConverter x:Key="StringToDecimalCurrencyConverter"></local:StringToDecimalCurrencyConverter>
</Window.Resources>
<Grid DataContext="{StaticResource myEmployeeList}">
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="240" />
<RowDefinition Height="45" />
</Grid.RowDefinitions>
<ListBox Name="employeeListBox" ItemsSource="{Binding Path=., Mode=TwoWay}" Grid.Row="0" />
<Grid Grid.Row="1" DataContext="{Binding ElementName=employeeListBox, Path=SelectedItem, Mode=TwoWay}">
<Grid.RowDefinitions>
<RowDefinition Height="40" />
<RowDefinition Height="40" />
<RowDefinition Height="40" />
<RowDefinition Height="40" />
<RowDefinition Height="40" />
<RowDefinition Height="40" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="80" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Label Grid.Row="0" Grid.Column="0">First Name</Label>
<Label Grid.Row="1" Grid.Column="0">Last Name</Label>
<Label Grid.Row="2" Grid.Column="0">Title</Label>
<Label Grid.Row="3" Grid.Column="0">Department</Label>
<Label Grid.Row="4" Grid.Column="0">Salary</Label>
<TextBox Grid.Row="0" Grid.Column="1" Text="{Binding Mode=TwoWay, Path=FirstName}" />
<TextBox Grid.Row="1" Grid.Column="1" Text="{Binding Mode=TwoWay, Path=LastName}" />
<TextBox Grid.Row="2" Grid.Column="1" Text="{Binding Mode=TwoWay, Path=Title}" />
<TextBox Grid.Row="3" Grid.Column="1" Text="{Binding Mode=TwoWay, Path=Department}" />
<TextBox Grid.Row="4" Grid.Column="1" Text="{Binding Mode=TwoWay, StringFormat=\{0:c\}, UpdateSourceTrigger=PropertyChanged, Path=Salary}" />
<TextBlock Grid.Row="5" Grid.Column="1" Text="{Binding Mode=OneWay, Converter={StaticResource StringToDecimalCurrencyConverter}, Path=Salary}" />
</Grid>
</Grid>
</Window>
上記のコードから「UpdateSourceTrigger=PropertyChanged」を削除すると、正常に動作します。
StringFormat の代わりに Converter を使用してみましたが、それでも問題は解決しません。