我遇到了更新文本框中的文本问题。我得到这个主窗口:C#WPF更新属性更改文本框
<Window x:Class="TestDatabinding.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<Grid>
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition/>
<RowDefinition/>
</Grid.RowDefinitions>
<TextBox Grid.Row="0" Text="{Binding Text, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" Margin="10,10,10,10"/>
<Button Grid.Row="1" Content="Click me" Margin="10,10,10,10" Click="Button_Click"></Button>
<Button Grid.Row="2" x:Name="a1" Content="ShowText" Margin="10,10,10,10" Click="a1_Click" ></Button>
</Grid>
现在CS-文件中查找该主窗口的样子:
using System.Windows;
namespace TestDatabinding
{
public partial class MainWindow : Window
{
MainWindowViewModel mwvm;
public MainWindow()
{
InitializeComponent();
mwvm = new MainWindowViewModel();
this.DataContext = mwvm;
}
private void Button_Click(object sender, RoutedEventArgs e)
{
mwvm.ChangeText();
this.DataContext = mwvm;
}
private void a1_Click(object sender, RoutedEventArgs e)
{
mwvm.showText();
}
}
}
最后但并非最不重要的ViewModel类:
using System.ComponentModel;
using System.Windows;
namespace TestDatabinding
{
class MainWindowViewModel
{
public event PropertyChangedEventHandler PropertyChanged;
private string text;
public string Text
{
get { return this.text; }
set
{
this.text = value;
OnPropertyChanged("Text");
}
}
protected void OnPropertyChanged(string name)
{
PropertyChangedEventHandler handler = PropertyChanged;
if (handler != null)
{
handler(this, new PropertyChangedEventArgs(name));
}
}
public void ChangeText()
{
this.Text = "Hey paadddyy";
}
public void showText()
{
MessageBox.Show(Text);
}
}
}
我没有实现ICommands,因为这是一个简单的测试。 现在按钮的工作正常,但文本框文本没有得到更新。 任何建议我可以做什么?当我点击第一个按钮时,我只想显示“Hey paadddyy”。我按下第二个按钮,然后第一个消息框显示“嘿paadddyy”,但文本框的文本仍然不会更新:(
感谢您为每个提示后;)