How to bind a command defined in viewmodel of a child to an element in base window in WPF?-CodePudding

Consider the code snippet below for a second:

<StackPanel>
   <local:ChildElementWithCommand x:Name="ChildElementWithCommand">
   <Button Content="Test"> // Bind this button to a command from ChildElementWithCommand
</StackPanel>

How to bind this Button to a command from the usercontrol named ChildElementWithCommand (I am pretty sure that this is not a particularly clean architecture)

ChildElementWithCommand.xaml.cs

namespace Test
{
  public partial class ChildElementWithCommand : UserControl
  {
    public ViewModel vm;
    public ICommand MyCommand;
    public ChildElementWithCommand()
    {
      InitializeComponent();
      vm = new vm();
      MyCommand = vm.MyCommand; // I would like to use this command in Button above
    }
  }
}

CodePudding user response：

This way

<StackPanel>
   <local:ChildElementWithCommand x:Name="ChildElementWithCommand">
   <Button Content="Test" Command="{Binding ElementName=ChildElementWithCommand, Path=SomeCommand}">
</StackPanel>

'Path=' is optional.