wpf 事件参数 绑定到viewmdoel

public sealed class EventCommand : TriggerAction<DependencyObject>
{ public static readonly DependencyProperty CommandParameterProperty =
DependencyProperty.Register("CommandParameter", typeof(object), typeof(EventCommand), null); public static readonly DependencyProperty CommandProperty = DependencyProperty.Register(
"Command", typeof(ICommand), typeof(EventCommand), null); public static readonly DependencyProperty InvokeParameterProperty = DependencyProperty.Register(
"InvokeParameter", typeof(object), typeof(EventCommand), null); private string commandName; public object InvokeParameter
{
get
{
return this.GetValue(InvokeParameterProperty);
}
set
{
this.SetValue(InvokeParameterProperty, value);
}
} public ICommand Command
{
get
{
return (ICommand)this.GetValue(CommandProperty);
}
set
{
this.SetValue(CommandProperty, value);
}
} public string CommandName
{
get
{
return this.commandName;
}
set
{
if (this.CommandName != value)
{
this.commandName = value;
}
}
} public object CommandParameter
{
get
{
return this.GetValue(CommandParameterProperty);
} set
{
this.SetValue(CommandParameterProperty, value);
}
} public object Sender { get; set; } protected override void Invoke(object parameter)
{
this.InvokeParameter = parameter;
if (this.AssociatedObject != null)
{
ICommand command = this.Command;
if ((command != null) && command.CanExecute(this.CommandParameter))
{
command.Execute(this.CommandParameter);
}
}
}
}

<i:Interaction.Triggers>
<i:EventTrigger EventName="Drop">
<cmds:EventCommand CommandName="DropCommand"
CommandParameter="{Binding RelativeSource={RelativeSource Self}, Path=InvokeParameter}"/>
</i:EventTrigger>
</i:Interaction.Triggers>