EVO PDF Viewer Control for ASP.NET

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

// the HTML to PDF converter namespace
using EvoPdf;

// the PDF Viewer namespace
using EvoPdf.PdfViewerAspNet;

namespace PdfViewer4AspNetDemo
{
    public partial class DisplayPdfBytes : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                LoadPageFitModes();
                LoadDocumentDisplayModes();

                LoadPdfStream();
            }
        }

        protected void btnConvert_Click(object sender, EventArgs e)
        {
            // apply the viewer settings before loading the PDF from stream
            ApplyViewerPreferences();
            ApplySecurityOptions();

            LoadPdfStream();
        }

        private void LoadPageFitModes()
        {
            string[] pageFitModes = Enum.GetNames(typeof(PageFitMode));
            ddlPageFitMode.DataSource = pageFitModes;
            ddlPageFitMode.DataBind();
            ddlPageFitMode.SelectedValue = pdfViewerControl.PageFitMode.ToString();
        }

        private void LoadDocumentDisplayModes()
        {
            string[] pageModes = Enum.GetNames(typeof(DocumentDisplayMode));
            ddlPageMode.DataSource = pageModes;
            ddlPageMode.DataBind();
            ddlPageMode.SelectedValue = pdfViewerControl.DocumentDisplayMode.ToString();
        }

        private void ApplyViewerPreferences()
        {
            pdfViewerControl.DocumentDisplayMode = 
                (DocumentDisplayMode)Enum.Parse(typeof(DocumentDisplayMode), ddlPageMode.SelectedValue);
            pdfViewerControl.ShowNavigationPanel = cbShowWindowUI.Checked;
            pdfViewerControl.ShowScrollbars = cbShowScrollbars.Checked;
            pdfViewerControl.ShowToolbarMode = 
                cbShowToolbar.Checked ? ShowToolbarMode.Show : ShowToolbarMode.Hide;
            pdfViewerControl.PageFitMode = 
                (PageFitMode)Enum.Parse(typeof(PageFitMode), ddlPageFitMode.SelectedValue);
        }

        private void ApplySecurityOptions()
        {
            pdfViewerControl.PdfSecurityOptions.CanPrint = cbAllowPrint.Checked;
            pdfViewerControl.PdfSecurityOptions.CanCopyContent = cbAllowContentCopy.Checked;
            pdfViewerControl.PdfSecurityOptions.CanFillFormFields = cbAllowFormFilling.Checked;
            pdfViewerControl.PdfSecurityOptions.CanEditContent = cbAllowContentEdit.Checked;
            pdfViewerControl.PdfSecurityOptions.CanEditAnnotations = cbAllowEditAnnotations.Checked;
            pdfViewerControl.PdfSecurityOptions.CanAssembleDocument = cbAllowAssemble.Checked;

            pdfViewerControl.PdfSecurityOptions.UserPassword = textBoxUserPassword.Text.Trim();
        }

        private void LoadPdfStream()
        {
            //get the PDF stream
            string urlToConvert = textBoxURLToConvert.Text.Trim();
            byte[] pdfBytes = new PdfConverter().GetPdfBytesFromUrl(urlToConvert);

            // set the PDF bytes to be loaded in viewer
            pdfViewerControl.PdfSourceBytes = pdfBytes;
        }

        protected void btnApplyViewerPreferences_Click(object sender, EventArgs e)
        {
            // update the viewer preferences
            ApplyViewerPreferences();
            ApplySecurityOptions();
        }
    }
}