Important Features of ASP.NET 4.0

1. What's new in ASP.NET 4.0
Quick Overview of Important Features
Sunil Pottumuttu

2. ASP.NET 3.5 Service Pack 1
Microsoft Entity Framework
ADO.NET Data Services
Dynamic Data

3. Overview of Talk
ASP.NET supports several very different types
of web applications

4. Web.config File Refactoring
<?xml version="1.0"?>
<configuration>
<system.web>
<compilation targetFramework="4.0" />
</system.web>
</configuration>

5. Extensible Output Caching
ASP.NET 4.0
OutputCacheProvider - create a custom output-
cache provider as a class that derives from the new
System.Web.Caching.OutputCacheProvider
Providers for 3rd Party, Velocity, FileSystem

6. Output Caching Configuration
<caching>
<outputCache defaultProvider="AspNetInternalProvider">
<providers>
<add name="DiskCache"
type="Test.OutputCacheEx.DiskOutputCacheProvider,
DiskCacheProvider"/>
</providers>
</outputCache>
</caching>

7. Output Caching Configuration at Page Level
<%@ OutputCache Duration="60" VaryByParam="None"
providerName="DiskCache" %>

8. Auto-Start Web Applications
Usual approach: Application_Start
Auto-Start
ASP.NET 4.0 + IIS 7.5
AppPool startMode set to “alwaysRunning”
IIS Application Warm-Up Module for IIS 7.5
warm-up occurs during startup of the IIS service (if
you configured the IIS application pool as
AlwaysRunning) and when an IIS worker process
recycles. During recycle, the old IIS worker process
continues to execute requests until the newly
spawned worker process is fully warmed up, so that
applications experience no interruptions or other
issues due to unprimed caches

9. IIS Configuration for the above
In applicationHost.config
<applicationPools>
<add name="MyApplicationPool"
startMode="AlwaysRunning" />
</applicationPools>

10. Permanently Redirecting a Page
RedirectPermanent("/newpath/foroldcontent.aspx");

11. Session State Compression
Used when state is out of porcess
compressionEnabled in web.config
DeflateStream/GZipStream
Use System.IO.Compression.GZipStream
Web.config
<sessionState mode="SqlServer"
sqlConnectionString="data source=dbserver;Initial
Catalog=aspnetstate"
allowCustomSqlDatabase="true"
compressionEnabled="true“
/>

12. Expanding the Range of Allowable URLs
Previous versions of ASP.NET constrained
URL path lengths to 260 characters, based
on the NTFS file-path limit.
<httpRuntime
maxRequestPathLength="260"
maxQueryStringLength="2048" />

13. Request Path Valid Chars
ASP.NET, the URL character checks were limited to a
fixed set of characters. In ASP.NET 4, you can customize
the set of valid characters using the new
requestPathInvalidChars attribute of the httpRuntime
configuration element
<httpRuntime requestPathInvalidChars="&lt;,&gt;,*,%,&amp;,:,,?" />
By default, the requestPathInvalidChars attribute defines eight
characters as invalid. (In the string that is assigned to
requestPathInvalidChars by default, the less than (<), greater than (>),
and ampersand (&) characters are encoded, because the Web.config
file is an XML file.) You can customize the set of invalid characters as
needed

14. Extensible Request Validation
System.Web.Util.RequestValidator
<httpRuntime requestValidationType="Samples.MyValidator, Samples" />
public class CustomRequestValidation : RequestValidator
{
protected override bool IsValidRequestString(
HttpContext context, string value,
RequestValidationSource requestValidationSource,
string collectionKey,
out int validationFailureIndex)
{...}
}

15. Object Caching and Object Caching Extensibility
System.Runtime.Caching.dll
Can Implement MemoryCache

16. Extensible HTML, URL, and HTTP Header Encoding
<httpRuntime
encoderType="Samples.MyCustomEnco
der, Samples" />
You can create a custom encoder by deriving from the new
System.Web.Util.HttpEncoder
After a custom encoder has been configured, ASP.NET
automatically calls the custom encoding implementation
whenever public encoding methods of the
System.Web.HttpUtility or System.Web.HttpServerUtility
classes are called

17. Multi-Targeting
• <compilation targetFramework="4.0"/>

18. jQuery Included with Web Forms and MVC
jQuery-1.4.1.js – The human-readable, unminified version
of the jQuery library.
jQuery-14.1.min.js – The minified version of the jQuery
library.
jQuery-1.4.1-vsdoc.js – The Intellisense documentation file
for the jQuery library.

19. Content Delivery Network Support
<script src="http://ajax.microsoft.com/ajax/jquery/jquery-
1.4.2.js" type="text/javascript"></script>
Supports SSL
More Details here: http://www.asp.net/ajaxlibrary/CDN.ashx
ASP.NET ScriptManager supports the Microsoft Ajax CDN
<asp:ScriptManager ID="sm1" EnableCdn="true" runat="server" />

20. ScriptManager Explicit Scripts
<asp:ScriptManager ID="sm1"
AjaxFrameworkMode="Explicit" runat="server">
<Scripts>
<asp:ScriptReference Name="MicrosoftAjaxCore.js" />
<asp:ScriptReference
Name="MicrosoftAjaxComponentModel.js" />
<asp:ScriptReference Name="MicrosoftAjaxSerialization.js" />
<asp:ScriptReference Name="MicrosoftAjaxNetwork.js" />
</Scripts>
</asp:ScriptManager>
** ScriptManager.AjaxFrameworkMode

21. Setting Meta Tags
Page.MetaKeywords and Page.MetaDescription
Properties of Page class
<meta name="keywords" content="These, are, my,
keywords" />
<meta name="description" content="This is the
description of my page" />
OR
<%@ Page Language="C#" AutoEventWireup="true"
CodeFile="Default.aspx.cs"
Inherits="_Default"
Keywords="These, are, my, keywords"
Description="This is a description" %>

22. Enabling View State for Individual Controls
ViewStateMode Property
Enabled
Disabled
Inherit
Enabled enables view state for that control
and for any child controls that are set to
Inherit or that have nothing set. Disabled
disables view state, and Inherit specifies
that the control uses the ViewStateMode
setting from the parent control

23. ASP.NET Core Enhancements
Cache Extensibility
Auto-Start Web Applications
Browser Capabilities Extensibility
Session State Compression

24. ASP.NET Core Enhancements
Cache Extensibility
Auto-Start Web Applications
Browser Capabilities Extensibility
Session State Compression

25. Browser Definition Files
blackberry.browser
chrome.browser
Default.browser
firefox.browser
gateway.browser
generic.browser
ie.browser
iemobile.browser
iphone.browser
opera.browser
safari.browser

26. Routing in ASP.NET 4
public class Global : System.Web.HttpApplication
{
void Application_Start(object sender, EventArgs e)
{
RouteTable.Routes.MapPageRoute("SearchRoute",
"search/{searchterm}", "~/search.aspx");
RouteTable.Routes.MapPageRoute("UserRoute", "users/{username}", "~/users.aspx");
}
}
Equivalent asp.net 4
RouteTable.Routes.Add("SearchRoute", new Route("search/{searchterm}",
new PageRouteHandler("~/search.aspx")));
string searchterm = Page.RouteData.Values["searchterm"] as string;

27. Accessing Routing Information in Markup
<asp:HyperLink ID="HyperLink1" runat="server"
NavigateUrl="<%$RouteUrl:SearchTerm=scott%>">
Search for Scott</asp:HyperLink>

28. Setting Client IDs
Predictable Client ID’s
<%@ Page Language="C#" AutoEventWireup="true"
CodeFile="Default.aspx.cs"
Inherits="_Default"
ClientIDMode="Predictable" %>
OR
<system.web>
<pages clientIDMode="Predictable"></pages>
</system.web>

29. Chart Control
35 distinct chart types.
An unlimited number of chart areas, titles,
legends, and annotations.
A wide variety of appearance settings for all chart
elements.
3-D support for most chart types.
More than 50 financial and statistical formulas for
data analysis and transformation.
State management.
Binary streaming.

30. New Syntax for HTML Encoded Expressions
Old Style
<%= HttpUtility.HtmlEncode(expression) %>
New style
<%: expression %>

31. Project Template Changes
Web Site project or Web Application project

32. Empty Web Application Template

33. Web Application and Web Site Project Templates

34. Dynamic Data
•RAD experience for quickly building a data-driven Web site.
•Automatic validation that is based on constraints defined in the data model.
•The ability to easily change the markup that is generated for fields in the
GridView and DetailsView controls by using field templates that are part of
your Dynamic Data project.