我的 ViewModel 中有以下内容:
public MyViewModel() {
CloseCommend = new RelayCommand(closeWindow);
}
public RelayCommand CloseCommend;
private void closeWindow() {
Application.Current.MainWindow.Close();
}
XAML:
<Button ... Command="{Binding CloseCommend}"/>
我看到 ViewModel 构造函数已初始化,因此绑定(bind)应该在那里。但是当我点击关闭按钮时,什么也没有发生。任何想法我做错了什么?
最佳答案
从字段定义更改为属性定义:
public RelayCommand CloseCommand { get; set; }
为什么:
字段通常是不可绑定(bind)的。查看 Binding Sources Overview
You can bind to public properties, sub-properties, as well as indexers, of any common language runtime (CLR) object. The binding engine uses CLR reflection to get the values of the properties. Alternatively, objects that implement ICustomTypeDescriptor or have a registered TypeDescriptionProvider also work with the binding engine.
For more information about how to implement a class that can serve as a binding source, see Implementing a Class for the Binding Source later in this topic.
在“ 其他特性 ”部分下:
You cannot bind to public fields.
关于c# - 为什么不调用 RelayCommand?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/39395646/