MTP2.0_CSharp/Muchinfo.MTPClient/Fx4.0/Main/03.UI/Modules/Muchinfo.MTPClient.Delivery/Views/PrintWindow.xaml.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
using CefSharp;
using CefSharp.Wpf;
 

namespace Muchinfo.MTPClient.Delivery.Views
{
    /// <summary>
    /// PrintWindow.xaml 的交互逻辑
    /// </summary>
    public partial class PrintWindow : Window, IRequestHandler
    {
        private WebView _view;
        public PrintWindow(string url)
        {
            InitializeComponent();

            CEF.Initialize(new Settings { LogSeverity = LogSeverity.Disable, PackLoadingDisabled = true });

            BrowserSettings browserSetting = new BrowserSettings { ApplicationCacheDisabled = true, PageCacheDisabled = true };

            _view = new WebView(string.Empty, browserSetting)
            {
                Address = url,
                RequestHandler = this,
                Background = Brushes.White
            };

       //     _view.RegisterJsObject("callbackObj", new CallbackObjectForJs());

            _view.LoadCompleted += _view_LoadCompleted;
            PrintGrid.Children.Clear();
            PrintGrid.Children.Insert(0, _view);

            this.Unloaded += WebPageViewer_Unloaded;
        }

        public bool GetAuthCredentials(IWebBrowser browser, bool isProxy, string host, int port, string realm, string scheme, ref string username, ref string password)
        {
            return false;
        }

        public bool GetDownloadHandler(IWebBrowser browser, string mimeType, string fileName, long contentLength, ref IDownloadHandler handler)
        {
            return false;
        }

        public bool OnBeforeBrowse(IWebBrowser browser, IRequest request, NavigationType naigationvType, bool isRedirect)
        {
            return false;
        }

        public bool OnBeforeResourceLoad(IWebBrowser browser, IRequestResponse requestResponse)
        {
            return false;
        }

        public void OnResourceResponse(IWebBrowser browser, string url, int status, string statusText, string mimeType, System.Net.WebHeaderCollection headers)
        {
            
        }


        private void WebPageViewer_Unloaded(object sender, RoutedEventArgs e)
        {
            ////资源清理
            try
            {
                if (_view != null)
                {
                    _view.CloseDevTools();
                }
            }
            catch { }

            try
            {
                if (_view != null)
                {
                    _view.Dispose();
                }
                _view = null;
            }
            catch { }
        }

        private void _view_LoadCompleted(object sender, LoadCompletedEventArgs url)
        {
            if (_view != null)
            {
                Application.Current.Dispatcher.BeginInvoke(new Action(() =>
                {
                    printButton.IsEnabled = true;
                }));

            }
        }

        public void View(string url)
        {
            if (_view.IsBrowserInitialized)
            {
                _view.Visibility = Visibility.Hidden;

               

                _view.Load(url);
            }
        }

        private void PrintButton_OnClick(object sender, RoutedEventArgs e)
        {
            if (_view != null)
            {
                _view.Print();
            }
        }
    }
}