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//////////////////////////////////////////////////////////////////////////
// Copyright 2001-2011 Aspose Pty Ltd. All Rights Reserved.
//
// This file is part of Aspose.Words. The source code in this file
// is only intended as a supplement to the documentation, and is provided
// "as is", without warranty of any kind, either expressed or implied.
//////////////////////////////////////////////////////////////////////////
using System;
using System.Web.UI;
using System.Web.UI.WebControls;
using Aspose.Words.Saving;
namespace Aspose.Words.Demos.WebForms
{
/// <summary>
/// This is a base class for all pages that run individual demos in this demo project.
/// </summary>
public abstract class DemoBasePage : Page
{
/// <summary>
/// Derived demo pages need to return an object that runs the demo.
/// </summary>
internal abstract Demo Demo
{
get;
}
/// <summary>
/// Derived demo pages need to return the select output format control.
/// </summary>
protected abstract SelectFormat Format
{
get;
}
/// <summary>
/// Derived demo pages need to return the submit button.
/// </summary>
protected abstract Button Submit
{
get;
}
override protected void OnInit(EventArgs e)
{
this.Submit.Click += new System.EventHandler(this.SubmitBtn_Click);
this.Load += new System.EventHandler(this.DemoBase_Load);
this.PreRender += new System.EventHandler(this.HandlePreRender);
base.OnInit(e);
}
/// <summary>
/// Called when the user clicks the Submit button.
/// Does some plumbing at first and then executes the demo.
/// </summary>
private void SubmitBtn_Click(object sender, EventArgs e)
{
// If date/time stamps stored in the view state and in the session objects are not equal,
// then the user has refreshed the page instead of submitting.
if (null == ViewState["Update"])
{
SetSessionDateTimeStamp();
return;
}
if (null == Session["Update"])
{
SetSessionDateTimeStamp();
return;
}
if (!ViewState["Update"].ToString().Equals(Session["Update"].ToString()))
return;
ExecuteDemo();
// Set the session stamp right after submitting.
SetSessionDateTimeStamp();
}
private void ExecuteDemo()
{
// This is needed so the demo knows the path to the database and to the template documents.
Demo.Init(MapPath("bin"));
// Execute the demo and get the generated document as an object.
Document doc = Demo.Execute();
// Once we have a document, we can save it to a file, stream or send to the client browser.
// We just send the document to the browser here in the format selected by the user.
SendToBrowser(doc);
Response.End();
}
/// <summary>
/// Sends the document to the client browser in the specified format.
/// </summary>
private void SendToBrowser(Document doc)
{
switch (Format.Format)
{
case "DOC":
doc.Save(Response, "Aspose.Words.Demos.doc", ContentDisposition.Attachment, SaveOptions.CreateSaveOptions(SaveFormat.Doc));
break;
case "DOCX":
doc.Save(Response, "Aspose.Words.Demos.docx", ContentDisposition.Attachment, SaveOptions.CreateSaveOptions(SaveFormat.Docx));
break;
case "PDF":
doc.Save(Response, "Aspose.Words.Demos.pdf", ContentDisposition.Attachment, SaveOptions.CreateSaveOptions(SaveFormat.Pdf));
break;
case "XPS":
doc.Save(Response, "Aspose.Words.Demos.xps", ContentDisposition.Attachment, SaveOptions.CreateSaveOptions(SaveFormat.Xps));
break;
case "Render":
SendToBrowserAsBitmap(doc);
break;
case "ODT":
doc.Save(Response, "Aspose.Words.Demos.odt", ContentDisposition.Attachment, SaveOptions.CreateSaveOptions(SaveFormat.Odt));
break;
case "MHTML":
{
HtmlSaveOptions htmlOptions = new HtmlSaveOptions(SaveFormat.Mhtml);
htmlOptions.ExportHeadersFootersMode = ExportHeadersFootersMode.None;
doc.Save(Response, "Aspose.Words.Demos.mht", ContentDisposition.Attachment, htmlOptions);
break;
}
case "HTML":
SendToBrowserAsHtml(doc);
break;
case "RTF":
doc.Save(Response, "Aspose.Words.Demos.rtf", ContentDisposition.Attachment, SaveOptions.CreateSaveOptions(SaveFormat.Rtf));
break;
case "WML":
doc.Save(Response, "Aspose.Words.Demos.xml", ContentDisposition.Attachment, SaveOptions.CreateSaveOptions(SaveFormat.WordML));
break;
case "FOPC":
doc.Save(Response, "Aspose.Words.Demos.xml", ContentDisposition.Attachment, SaveOptions.CreateSaveOptions(SaveFormat.FlatOpc));
break;
case "TXT":
doc.Save(Response, "Aspose.Words.Demos.txt", ContentDisposition.Attachment, SaveOptions.CreateSaveOptions(SaveFormat.Text));
break;
case "EPUB":
{
HtmlSaveOptions epubOptions = new HtmlSaveOptions(SaveFormat.Epub);
epubOptions.ExportHeadersFootersMode = ExportHeadersFootersMode.None;
// This option improves how tables are displayed in the reader.
epubOptions.TableWidthOutputMode = HtmlElementSizeOutputMode.None;
doc.Save(Response, "Aspose.Words.Demos.epub", ContentDisposition.Attachment, epubOptions);
}
break;
case "SWF":
ViewSWFInDocViewer(doc);
break;
default:
throw new Exception("Unknown output format.");
}
}
/// <summary>
/// Redirect the client to the SWF document veiwer.
/// </summary>
private void ViewSWFInDocViewer(Document doc)
{
const string path = @"Temp\Aspose.Words.Demos.swf";
// Populate the navigation outline pane in the SWF viewer using headings in the document.
// This will include headings styled with Heading 1 - Heading 3 in the pane and the first two heading styles
// will be expanded by default.
SwfSaveOptions saveOptions = new SwfSaveOptions();
saveOptions.HeadingsOutlineLevels = 3;
saveOptions.ExpandedOutlineLevels = 2;
doc.Save(MapPath(path), saveOptions);
Response.Redirect("FlashDocViewer.aspx");
}
/// <summary>
/// Stream the document to the client browser in the HTML format.
/// </summary>
private void SendToBrowserAsHtml(Document doc)
{
// Output the XHTML header.
HtmlSaveOptions htmlOptions = new HtmlSaveOptions();
htmlOptions.ExportXhtmlTransitional = true;
// Headers and footers are not needed in HTML format.
htmlOptions.ExportHeadersFootersMode = ExportHeadersFootersMode.None;
// It is better to save the document into a file as it saves all images into
// the same folder and embeds only image file names into HTML so the images
// will be downloaded into the browser okay.
const string htmlUrl = @"Temp\Aspose.Words.Demos.html";
doc.Save(MapPath(htmlUrl), htmlOptions);
// Redirecting to the HTML document rather than saving it into the response stream
// makes sure the browser can find the images in the same folder as the document.
#if SITE_BUILD
string strDemoUrl = "/demos/" + Response.ApplyAppPathModifier("~/" + htmlUrl);
Response.Redirect(strDemoUrl);
#else
Response.Redirect(htmlUrl);
#endif
}
/// <summary>
/// Redirects the document to the rendering form.
/// </summary>
private void SendToBrowserAsBitmap(Document doc)
{
Session["Document"] = doc;
Response.Redirect("viewdocument.aspx");
}
/// <summary>
/// Some plumbing.
/// </summary>
private void SetSessionDateTimeStamp()
{
Session["Update"] = Session.SessionID + DateTime.Now.ToString();
}
/// <summary>
/// Some plumbing.
/// </summary>
protected override void OnLoad(EventArgs e)
{
if (!String.IsNullOrEmpty(Request.QueryString["action"]))
{
if (Request.QueryString["action"].ToLower() == "show")
ExecuteDemo();
}
base.OnLoad(e);
}
/// <summary>
/// Some plumbing.
/// </summary>
protected void DemoBase_Load(object sender, EventArgs e)
{
if (!IsPostBack)
SetSessionDateTimeStamp();
}
/// <summary>
/// Some plumbing.
/// </summary>
private void HandlePreRender(object sender, EventArgs e)
{
ViewState["Update"] = Session["Update"];
}
}
}
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