WPF Relaycommand得到passwordbox值

Question

我有這個Passwordbox這個觸發器：

<PasswordBox> 
    <i:Interaction.Triggers> 
     <i:EventTrigger EventName="PasswordChanged"> 
      <i:InvokeCommandAction Command="{Binding PasswordChanged}" /> 
     </i:EventTrigger> 
    </i:Interaction.Triggers> 
</PasswordBox> 

我如何，我RelayCommand，讓我PasswordBox的內容？

這是我的繼電器命令：

PasswordChanged = new RelayCommand<object>(param => this.GoPasswordChanged()); 

private void GoPasswordChanged() 
{  
} 

Answer 1

我找到了解決辦法，我剛改：

<i:InvokeCommandAction Command="{Binding PasswordChanged}" /> 

要：

<i:InvokeCommandAction Command="{Binding PasswordChanged}" CommandParameter="{Binding ElementName=PasswordBoxInput}" /> 

和：

PasswordChanged = new RelayCommand<object>(param => this.GoPasswordChanged(param)); 

private void GoPasswordChanged(param) 
     { 

     } 

要：

private void GoPasswordChanged(object param) 
     { 
      var passwordBox = param as PasswordBox; 
      var password = passwordBox.Password; 
     }