Devexpress PdfViewer预览pdf，禁止下载，打印，复制

1 pdfViewer.MenuManager.DisposeManager();
2 pdfViewer.NavigationPaneVisibility=DevExpress.XtraPdfViewer.PdfNavigationPaneVisibility.Hidden;
3 pdfViewer.NavigationPaneInitialVisibility=DevExpress.XtraPdfViewer.PdfNavigationPaneVisibility.Hidden;
4 pdfViewer.DetachStreamAfterLoadComplete = false;//加载完文档后关闭流

加载文档的方式：
    1、pdfViewer.LoadDocument(ms);//支持流Stream（FileStream）
    2、pdfViewer.DocumentFilePath = path;//文件所在路径path

            var fbDialog = new FolderBrowserDialog();
            if (fbDialog.ShowDialog() != DialogResult.OK)
            {
                return;
            }
            var folderPath = fbDialog.SelectedPath;    

　　　　　　　KingMessageBox.ShowMessage($"下载完成!");
            Process.Start("explorer.exe", folderPath);//文件保存完毕后，显示文件所在的目录

pdfViewer1.SaveDocument(流的形式);

this.pdfViewer.Print();