PDFOffice_Windows_exe/PDF Office/ViewModels/PropertyPanel/Scan/ScanPropertyPanelViewModel.cs

using ComPDFKitViewer.PdfViewer;
using PDF_Office.EventAggregators;
using PDF_Office.Model;
using Prism.Commands;
using Prism.Events;
using Prism.Mvvm;
using Prism.Regions;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace PDF_Office.ViewModels.PropertyPanel.Scan
{
    class ScanPropertyPanelViewModel : BindableBase, INavigationAware
    {
        private int pageCount;

        public int PageCount
        {
            get { return pageCount; }
            set
            {
                SetProperty(ref pageCount, value);
            }
        }

        private string setPageRange;

        public string SetPageRange
        {
            get { return setPageRange; }
            set
            {
                SetProperty(ref setPageRange, value);
            }
        }


        private CPDFViewer PDFViewer;

        public IEventAggregator events;

        public DelegateCommand OCRCommand { get; set; }
        public bool IsNavigationTarget(NavigationContext navigationContext)
        {
            return true;
        }

        public void OnNavigatedFrom(NavigationContext navigationContext)
        {
            return;
        }

        public void OnNavigatedTo(NavigationContext navigationContext)
        {
            navigationContext.Parameters.TryGetValue<CPDFViewer>(ParameterNames.PDFViewer, out PDFViewer);
            if (PDFViewer == null)
            {
                return;
            }
            else
            {
                PageCount = PDFViewer.Document.PageCount;
            }
        }
        public ScanPropertyPanelViewModel(IEventAggregator eventAggregator)
        {
            events = eventAggregator;
            OCRCommand = new DelegateCommand(OCR);
        }
        private void OCR()
        {
            events.GetEvent<ScanEvent>().Publish(new ScanEventArgs()
            {
                Unicode = App.mainWindowViewModel.SelectedItem.Unicode,
                PageRange = SetPageRange,
                Mode = ScanMode.OCR,
                ScanLanguage= ScanLanguageMode.ChineseS
            }
            ); 
        }
    }
}