【WPF】七、通知更改INotifyPropertyChanged
首先要继承INotifyPropertyChanged
简单方式在赋值的时候调用PropertyChanged
namespace WpfApp1
{
public class MainViewModel:INotifyPropertyChanged
{
public MyCommand ShowCommand { get; set; }
public event PropertyChangedEventHandler PropertyChanged;
public string Name
{
get { return name; }
set { name = value;
//通知客户端内容更改的方式一种
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("Name"));
}
}
public string name;
public MainViewModel()
{
Name = "Hello World";
ShowCommand = new MyCommand(Show);
}
public void Show()
{
Name = "点击了Button";
MessageBox.Show(Name);
}
}
}
方式二:自动绑定
封装一个事件调用OnPropertyChanged
namespace WpfApp1
{
public class MainViewModel:INotifyPropertyChanged
{
public MyCommand ShowCommand { get; set; }
public event PropertyChangedEventHandler PropertyChanged;
public void OnPropertyChanged([CallerMemberName]string propertyName="")
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}
public string Name
{
get { return name; }
set { name = value;
//通知客户端内容更改的方式一种
OnPropertyChanged();
}
}
public string name;
public MainViewModel()
{
Name = "Hello World";
ShowCommand = new MyCommand(Show);
}
public void Show()
{
Name = "点击了Button";
MessageBox.Show(Name);
}
}
}
本文作者:xxxyz
本文链接:https://www.cnblogs.com/xxxyz/p/16654438.html
版权声明:本作品采用知识共享署名-非商业性使用-禁止演绎 2.5 中国大陆许可协议进行许可。
【推荐】国内首个AI IDE,深度理解中文开发场景,立即下载体验Trae
【推荐】编程新体验,更懂你的AI,立即体验豆包MarsCode编程助手
【推荐】抖音旗下AI助手豆包,你的智能百科全书,全免费不限次数
【推荐】轻量又高性能的 SSH 工具 IShell:AI 加持,快人一步