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  • WPF:向客户端发出某一属性值已更改的通知INotifyPropertyChanged接口

    Person.cs

    using System.ComponentModel;
    
    namespace _01_INotifyPropertyChanged
    {
        class Person:INotifyPropertyChanged
        {
            private double height;
            private double weight;
            public double Height {
                set
                {
                    this.height = value;
                }
    
                get
                {
                    return height;
                }
            }
            public double Weight 
            {
                set
                {
                    this.weight = value;
                    if (PropertyChanged != null)
                    {
                        PropertyChanged(this, new PropertyChangedEventArgs("Weight"));
                    }
                }
    
                get
                {
                    return weight;
                }
            }
    
            public event PropertyChangedEventHandler PropertyChanged;
        }
    }
    


    MainWindow.xaml

    <Window x:Class="_01_INotifyPropertyChanged.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" WindowStartupLocation="CenterScreen" FontSize="14" Loaded="Window_Loaded">
        <Grid>
            <Grid>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition></ColumnDefinition>
                    <ColumnDefinition></ColumnDefinition>
                    <ColumnDefinition></ColumnDefinition>
                </Grid.ColumnDefinitions>
                <Grid.RowDefinitions>
                    <RowDefinition></RowDefinition>
                    <RowDefinition></RowDefinition>
                    <RowDefinition></RowDefinition>
                </Grid.RowDefinitions>
                <TextBlock Text="身高" VerticalAlignment="Center" HorizontalAlignment="Right"></TextBlock>
                <TextBox Text="{Binding Height}" Name="txtHeight" Grid.Column="1" VerticalAlignment="Center" HorizontalAlignment="Center" Width="58"></TextBox>
                <Button Name="btnHeightIncrease" Content="身高加1" Grid.Column="2" VerticalAlignment="Center" HorizontalAlignment="Left" Click="btnHeightIncrease_Click"></Button>
                <TextBlock Text="体重" Grid.Row="1" VerticalAlignment="Center" HorizontalAlignment="Right"></TextBlock>
                <TextBox Text="{Binding Weight}" Name="txtWeight" Grid.Row="1" Grid.Column="1" VerticalAlignment="Center" HorizontalAlignment="Center" Width="58"></TextBox>
                <Button Name="btnWeightIncrease" Content="体重加1" Grid.Row="1" Grid.Column="2" VerticalAlignment="Center" HorizontalAlignment="Left" Click="btnWeightIncrease_Click"></Button>
                <DataGrid Name="dgPerson" Grid.Row="2" Grid.ColumnSpan="3" BorderBrush="White" Background="White" CanUserAddRows="False"></DataGrid>
            </Grid>
        </Grid>
    </Window>
    


    MainWindow.xaml.cs

    using System.Collections.Generic;
    using System.Windows;
    using System.Windows.Documents;
    
    namespace _01_INotifyPropertyChanged
    {
        /// <summary>
        /// MainWindow.xaml 的交互逻辑
        /// </summary>
        public partial class MainWindow : Window
        {
            Person person = new Person();
            public MainWindow()
            {
                InitializeComponent();
            }
    
            private void Window_Loaded(object sender, RoutedEventArgs e)
            {
                List<Person> listPerson = new List<Person>();
                person.Height = 175.3;
                person.Weight = 66.7;
                listPerson.Add(person);
    
                txtHeight.DataContext = txtWeight.DataContext = person;
                dgPerson.ItemsSource = listPerson;
            }
    
            private void btnHeightIncrease_Click(object sender, RoutedEventArgs e)
            {
                person.Height++;
                MessageBox.Show(string.Format("身高现在是{0},但dgPerson绑定的数据没有刷新。", person.Height));
    
            }
    
            private void btnWeightIncrease_Click(object sender, RoutedEventArgs e)
            {
                person.Weight++;
                MessageBox.Show(string.Format("体重现在是{0},dgPerson已刷新。", person.Weight));
            }
        }
    }
    


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  • 原文地址:https://www.cnblogs.com/riasky/p/3507265.html
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