用到集合ObservableCollection,此集合微软的解释为:动态收集数据并通知到显示的控件,无论数据是刷新、删除、增加、更新。
新建Model,注意看里面的大小写。
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading.Tasks;
namespace WPFTest
{
//绑定的类必须要继承自INotifyPropertyChanged
public class ViewModelTest: INotifyPropertyChanged
{
private string testString = "aaaaaa";
public ObservableCollection<myString> randomString = new ObservableCollection<myString>()
{
new myString{ randomStringValue="bbbbbbbbbbb"},
};
//ObservableCollection相当于一种List,增删改可以通知到界面。
public ObservableCollection<myString> RandomString
{
get => randomString;
set => SetProperty(ref randomString, value);
}
public string TestString
{
get => testString;
set => SetProperty(ref testString, value);
}
public class myString
{
public string randomStringValue { set; get; }
}
protected void SetProperty<T>(ref T prop, T value, [CallerMemberName] string propertyName = null)
{
if (EqualityComparer<T>.Default.Equals(prop, value) == false)
{
prop = value;
OnPropertyChanged(propertyName);
}
}
public event PropertyChangedEventHandler PropertyChanged;
private void OnPropertyChanged(String info)
{
PropertyChangedEventHandler handler = PropertyChanged;
if (handler != null)
{
handler(this, new PropertyChangedEventArgs(info));
}
}
}
}
界面
<Window x:Class="WPFTest.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:WPFTest"
mc:Ignorable="d"
Title="MainWindow" Height="688.091" Width="1174.727" Background="LightBlue">
<Grid>
<Label Content="{Binding TestString}"
HorizontalAlignment="Left"
Height="29" Margin="204,116,0,0" Background="LightCyan"
VerticalAlignment="Top" Width="460"/>
<Button Content="Button" HorizontalAlignment="Left" Height="43"
Margin="204,206,0,0" VerticalAlignment="Top" Width="144" Click="Button_Click"/>
<Label Content="" x:Name="label2"
HorizontalAlignment="Left"
Height="29" Margin="204,163,0,0" Background="LightCyan"
VerticalAlignment="Top" Width="460"/>
<TextBox HorizontalAlignment="Left" Height="36" Margin="204,75,0,0"
TextWrapping="Wrap" Text="{Binding TestString,Mode=TwoWay}"
VerticalAlignment="Top" Width="460"/>
<Button Content="Button" HorizontalAlignment="Left"
Height="45" Margin="204,500,0,0" VerticalAlignment="Top" Width="169" Click="Button_Click_1"/>
<DataGrid HorizontalAlignment="Left" x:Name="dataGrid1"
ItemsSource="{Binding RandomString}" AutoGenerateColumns="False"
Height="178" Margin="204,290,0,0" VerticalAlignment="Top" Width="688">
<DataGrid.Columns>
<DataGridTextColumn Header="randomStringValue" Binding="{Binding randomStringValue}" />
</DataGrid.Columns>
</DataGrid>
</Grid>
</Window>
后端代码
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
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 JSON=System.Text.Json.JsonSerializer;
namespace WPFTest
{
/// <summary>
/// MainWindow.xaml 的交互逻辑
/// </summary>
public partial class MainWindow : Window
{
ViewModelTest vm = new ViewModelTest();
public MainWindow()
{
InitializeComponent();
DataContext= vm;//必须要在此处指定DataContext,不指定则为当前类
}
private void Button_Click(object sender, RoutedEventArgs e)
{
vm.TestString = Guid.NewGuid().ToString();
label2.Content = vm.TestString;
}
private void Button_Click_1(object sender, RoutedEventArgs e)
{
vm.randomString.Add(
new ViewModelTest.myString
{
randomStringValue=Guid.NewGuid().ToString()
}
);
}
public class Number
{
public string randomStringValue { set; get; }
}
}
}