我编写了一个非常短的应用程序,我试图在其中实现以下目标:CheckBox
从代码中更改其状态。我已经连接了INotifyPropertyChanged
界面并期待看到一些结果,但显然该应用程序什么也没做。数据绑定有问题吗?
窗口1.cs
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Threading;
namespace WpfTEST
{
/// <summary>
/// Interaction logic for Window1.xaml
/// </summary>
public partial class Window1 : Window, INotifyPropertyChanged
{
public Window1()
{
InitializeComponent();
this.Loaded += new RoutedEventHandler(Window1_Loaded);
this.PropertyChanged += new PropertyChangedEventHandler(Window1_PropertyChanged);
}
public bool Flag
{
get { return m_flag; }
set
{
m_flag = value;
OnPropertyChanged("Flag");
}
}
private bool m_flag = false;
void Window1_Loaded(object sender, RoutedEventArgs e)
{
this.m_cbox.DataContext = this;
for (int i = 0; i < 1000; i++)
{
Flag = (i % 2 == 0);
Thread.Sleep(200);
}
}
#region INotifyPropertyChanged Members
public event PropertyChangedEventHandler PropertyChanged;
public void OnPropertyChanged(string name)
{
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs(name));
}
void Window1_PropertyChanged(object sender, PropertyChangedEventArgs e)
{
}
#endregion
}
}
Window1.xaml
<Window x:Class="WpfTEST.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Window1" Height="300" Width="300" x:Name="window">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="0.5*" />
<ColumnDefinition Width="0.5*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="0.5*" />
<RowDefinition Height="0.5*" />
</Grid.RowDefinitions>
<CheckBox x:Name="m_cbox" Content="Let's see what happens" Grid.Row="2" Grid.Column="2" Grid.RowSpan="1" Grid.ColumnSpan="1" IsChecked="{Binding Path=Flag, ElementName=window, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" />
</Grid>
</Window>