Hi,

  I created to 2 usercontrol for parent,child and one mainwindow. I refer the child window inside the popup control of parent window.In parent window i try to click the button popup window display.
Now i want close the popup window,when i try the click the childwindow submit button.Please help me.

MainWindow.xaml:

        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:my="clr-namespace:WpfLab.Controls;assembly=WpfLab.Controls"
            xmlns:local="clr-namespace:parentchild.View"
        Title="MainWindow" Height="768" Width="1280">
          
               
   



ParentView.xaml:

             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:controls="clr-namespace:parentchild.View"
              xmlns:vm="clr-namespace:parentchild.ViewModel"
             mc:Ignorable="d"
             d:DesignHeight="768" d:DesignWidth="1280">
 
   
   

       
           
       


       
          
           
          
           
           
               
                   
                       
                   
               
           
       
 


ParentView.xaml.cs:


    public partial class ParentView : UserControl
    {
        public RumView()
        {
            InitializeComponent();
        
            this.DataContext = new ParentViewModel();
        }
    }
}


ParentViewModel.cs:
 public class ParentViewModel : INotifyPropertyChanged
    {
         private readonly IEventAggregator eventAggregator=new EventAggregator();

         private ParentModel currenparentModel;

        private string resultMessage;

        private bool _popupIsOpen;

        public RumViewModel()
        {
            currenrumModel = new RumModel();

            this.submitCommand = new DelegateCommand(this.Execute, this.CanExecute);
         
          
        }
        public bool IsPopupIsOpen
        {
            get { return _popupIsOpen; }
            set
            {
                _popupIsOpen = value;
                NotifyPropertyChanged("IsPopupIsOpen");
            }
        }
        public ParentModel currentparent
        {
            get
            {
                return currenparentModel
            }
            set
            {
                currenparentModel= value;
            }
        }
      
        public Visibility popupVisibility
        {
            get { return this.currenrumModel.popupVisibility; }
            set
            {
                this.currenrumModel.popupVisibility = value;
                this.NotifyPropertyChanged("popupVisibility");
            }
        }
        #region commands
        public ICommand submitCommand { get; private set; }
  
        #endregion

        private bool CanExecute(object arg)
        {
            return true;
          
        }

        private void Execute(object arg)
        {
            popupVisibility = Visibility.Visible;
            IsPopupIsOpen = true;
        }       
     
        private void RaiseCanExecuteChanged()
        {
            DelegateCommand tosscommand = tosscardCommand as DelegateCommand;
          
            cancelcommand.RaiseCanExecuteChanged();
        }
        #region INotifyPropertyChanged Members

        public event PropertyChangedEventHandler PropertyChanged;

        private void NotifyPropertyChanged(string propertyName)
        {
            if (this.PropertyChanged != null)
            {
                this.PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
            }
        }

        #endregion
}


ChildWindowView.xaml:
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
                 xmlns:viewModels="clr-namespace:parentchild.ViewModel"
               xmlns:views="clr-namespace:parentchild.View"
             mc:Ignorable="d"
             d:DesignHeight="500" d:DesignWidth="500">