主窗口
<Window x:Class="dep2.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:dep2"
Title="Window1" Height="300" Width="381">
<Grid>
<local:UserControl1></local:UserControl1>
<Button Height="23" HorizontalAlignment="Right" Margin="0,0,77,36" Name="button1" VerticalAlignment="Bottom" Width="75" Click="button1_Click">Button</Button>
</Grid>
</Window>
public partial class Window1 : Window
{
UserControl1 uc = new UserControl1();
public Window1()
{
InitializeComponent();
}
private void button1_Click(object sender, RoutedEventArgs e)
{
uc.InfoText = "SAMPLE";
}
}
我的用户控制
<UserControl x:Class="dep2.UserControl1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Height="32" Width="300">
<Grid Height="30">
<StackPanel Background="LightCyan">
<TextBox Height="21" Name="textBlock1" Width="120" Text="{Binding Text}" />
</StackPanel>
</Grid>
</UserControl>
public partial class UserControl1 : UserControl
{
public string InfoText
{
get
{
return (string)GetValue(InfoTextProperty);
}
set
{
SetValue(InfoTextProperty, value);
}
}
public static readonly DependencyProperty InfoTextProperty =
DependencyProperty.Register(
"InfoText",
typeof(string),
typeof(UserControl1),
new FrameworkPropertyMetadata(
new PropertyChangedCallback(ChangeText)));
private static void ChangeText(DependencyObject source, DependencyPropertyChangedEventArgs e)
{
(source as UserControl1).UpdateText(e.NewValue.ToString());
}
private void UpdateText(string NewText)
{
textBox1.Text = NewText;
}
public UserControl1()
{
InitializeComponent();
DataContext = this;
}
}
我在用户控件依赖属性中得到了我的价值,但我无法将我的值绑定到文本box.am使用这样绑定Text =“{Binding Text}”是对的,或者如何绑定我的值在用户控制
我在这里附上了我的示例项目, http://cid-08ec3041618e8ee4.skydrive.live.com/self.aspx/.SharedFavorites/dep2.rar
任何人都可以看,并告诉他们错误,
everythng运作良好,但我不能将值绑定在文本框中,
当你点击按钮时,你可以在消息框中看到传递给usercontrol的值,但我不能在文本框中绑定该值。
为什么????
答案 0 :(得分:2)
您的代码处理依赖项属性的回调并直接设置文本框值。这不是此回调的作用。
通过设置Text属性,您已经失去了绑定。本地属性设置的优先级高于绑定。见this blog