DSIK_FILEZILLA/sikFtpClient/ViewModel/MainViewModel.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Input;

namespace sikFtpClient.ViewModel
{
    public class MainViewModel : BaseViewModel
    {
        private BaseViewModel viewModel;
        
        public BaseViewModel ViewModel
        {
            get
            {
                return viewModel;
            }
            set
            {
                viewModel = value;
                OnPropertyChanged();
            }
        }
        public void ShowUpload()
        {
            ViewModel = new UploadViewModel();
        }
        RelayCommand showUploadCommand;
        public ICommand ShowUploadCommand
        {
            get
            {
                if (showUploadCommand == null)
                {
                    showUploadCommand = new RelayCommand(param => this.ShowUpload(),
                        param => true);
                }
                return showUploadCommand;
            }
        }
        public MainViewModel()
        {
            ViewModel = new ConnectionViewModel();
        }
    }
}