C# 未能在WPF中绑定
我现在正在学习WPF中的绑定。C# 未能在WPF中绑定,c#,wpf,C#,Wpf,我现在正在学习WPF中的绑定。 我想将Button.IsEnabled属性绑定到Class1的属性;Button.IsEnabled=c1.Property。事实上,Textblock.Text按我的预期更改,但Button.IsEnabled没有更改。 这是我的密码: [MainWindow.xaml.cs] using System.Windows; namespace WpfApp2 { public partial class MainWindow : Window {
我想将Button.IsEnabled属性绑定到Class1的属性;Button.IsEnabled=c1.Property。事实上,Textblock.Text按我的预期更改,但Button.IsEnabled没有更改。
这是我的密码: [MainWindow.xaml.cs]
using System.Windows;
namespace WpfApp2
{
public partial class MainWindow : Window
{
public static Class1 c1 { get; set; }
public MainWindow()
{
InitializeComponent();
c1 = new Class1();
}
private void Button_Click(object sender, RoutedEventArgs e)
{
c1.Property = !c1.Property;
textblock.Text = c1.Property.ToString();
}
}
}
[MainWindow.xaml]<Window x:Class="WpfApp2.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:WpfApp2"
mc:Ignorable="d"
Title="MainWindow" Height="450" Width="800">
<Grid>
<Button Content="Button" HorizontalAlignment="Left" Margin="150,137,0,0" VerticalAlignment="Top" Width="75" IsEnabled="{Binding Property, Source={x:Static local:MainWindow.c1}}"/>
<Button Content="Button2" HorizontalAlignment="Left" Margin="271,137,0,0" VerticalAlignment="Top" Width="75" Click="Button_Click"/>
<TextBlock x:Name="textblock" HorizontalAlignment="Left" Margin="150,177,0,0" TextWrapping="Wrap" Text="TextBlock" VerticalAlignment="Top"/>
</Grid>
</Window>
怎么了?我猜不出。。。我只能用代码来做吗?请帮帮我 您需要在
Class1
中实现INotifyPropertyChanged
接口,并在属性值更改时引发其PropertyChanged
事件:
namespace WpfApp2
{
public class Class1 : INotifyPropertyChanged
{
private bool property = false;
public bool Property
{
get { return property; }
set { if (value != property) { property = value; RaisePropertyChanged(); } }
}
public event PropertyChangedEventHandler PropertyChanged;
protected void RaisePropertyChanged([CallerMemberName] string propertyName = "")
=> PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName);
}
}
除了答案中解释的内容外,不要在主窗口中使用静态c1成员作为绑定源。相反,创建一个非静态成员,并设置DataContext=c1代码>在主窗口构造函数中。然后从绑定中删除源代码,只需写入IsEnabled=“{Binding Property}”
。花点时间阅读以下内容:。感谢您的详细回答!
namespace WpfApp2
{
public class Class1 : INotifyPropertyChanged
{
private bool property = false;
public bool Property
{
get { return property; }
set { if (value != property) { property = value; RaisePropertyChanged(); } }
}
public event PropertyChangedEventHandler PropertyChanged;
protected void RaisePropertyChanged([CallerMemberName] string propertyName = "")
=> PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName);
}
}