How to pass data from View to View Model

     namespace Hotel.Model
    {
        public class MainModel
        {
            public MainModel()
            {
            }

            public bool ConvertImageData(string uriSource, Image imageSource)
            {
                try
                {
                    BitmapImage bitImage = new BitmapImage();
                    bitImage.BeginInit();
                    bitImage.UriSource = new Uri(uriSource);
                    bitImage.EndInit();
                    imageSource.Source = bitImage;
                }
                catch (Exception e)
                {
                    MessageBox.Show(e.Source.ToString());
                    //MessageBox.Show("Select an appropriate File Type.");
                }
                return true;
            }

            public bool GetFileData(string path)
            {
                OpenFileDialog dlg = new OpenFileDialog();
                dlg.Filter = @"Picture File (*.jpg; *.jpeg; *.gif; *.bmp)|*.jpg; *.jpeg; *.gif; *.bmp 
                                | All Files (*.*)|*.*";
                dlg.Title = "Insert a Hotel Image";
                if (dlg.ShowDialog() == true)
                {
                    path = dlg.FileName;
                }
                return true;
            }


        }
    }

namespace Hotel.ViewModel.ViewModels
{
    public class EntryViewModel : BaseViewModel
    {
        private readonly MainModel model;
        private RelayCommand imageCommand;

        public EntryViewModel()
        {
            model = new MainModel();
        }

        public void GetImage()
        {    
            /*
             * Problem lies here... 
             * How do I get the selected file path based on the textbox in my view 
             * How do I get the name of the Image Control created in my view
             */
            model.ConvertImageData(entryFilePath, entryImage);
        }

        public ICommand OpenImageCommand
        {
            get
            {
                if (imageCommand == null)
                {
                    imageCommand = new RelayCommand(param => GetImage());
                }
                return imageCommand;
            }
        }        
    }
}

    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Page1">
   
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