Aspnet 4 new features

What’s new at a glance?
 Metakeyword & Metadescription
 ViewState
 ClientID
 Routing
 ListView, Formview, CheckBoxList, RadioButtonList
 Chart Control
 Web.config, Browser capabilities, Menu
 Extensible Output Caching

MetaKeyword & MetaDescription
protected void Page_Load(object sender, EventArgs e) {
Page.MetaDescription = "ASP.NET 4'ün yeni özellikleri";
Page.MetaKeywords = "ASP.NET 4";
}
<%@ Page Language="C#" AutoEventWireup="true"
MetaKeywords="ASP.NET 4" MetaDescription="ASP.NET
4'ün yeni özellikleri" CodeBehind="MetaKeyword.aspx.cs"
Inherits="ASPNET4.MetaKeyword" %>

MetaKeyword &MetaDescription
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title> </title>
<meta name="description" content="ASP.NET 4’ün yeni
özellikleri" />
<meta name="keywords" content="ASP.NET 4" />
</head>
<body>
(Page Description overrides)

ViewState improvements
 ASP.NET 3.x
 EnableViewState (true, false)
 Page level, server level
 ASP.NET 4
 ViewStateMode
 Enabled
 Disabled
 Inherit (Default)

<%@ Page Language="C#" AutoEventWireup="true"
CodeBehind="ViewState.aspx.cs"
ViewStateMode="Disabled"
Inherits="ASPNET4.ViewState" %>
.....
<asp:Label ID="Label1" runat="server“
ViewStateMode="Enabled"
Text="Label"></asp:Label>

Code behind :
Label1.ViewStateMode = ViewStateMode.Disabled;
NOTE : If we disabled the viewstate through
EnableViewState property, setting any values for
ViewStateMode property will make no impact.

ClientID
ASP.NET 3.x and earlier versions
<input
name="ctl00$ContentPlaceHolder1$TextBox2"
type="text"
id="ctl00_ContentPlaceHolder1_TextBox2" />

ClientID
 ClientIDMode
 AutoID (Default, old name is Legacy)
 Inherit
 Predictable
 Static

ClientID (Demo)
public class Oyunlar
{
public string Isim { get; set; }
public string Sirket { get; set; }
}
List<Oyunlar> oyunListesi = new List<Oyunlar>
{
new Oyunlar { Isim = "Hitman", Sirket = "IO Interactive" },
new Oyunlar { Isim = "Crysis", Sirket = "Crytek Studios" },
new Oyunlar { Isim = "Assassin's Creed", Sirket = "Gingerbread Studios" },
new Oyunlar{ Isim = "Call of Duty", Sirket = "N-Space" }
};

ClientID (Demo)
<asp:GridView ID="GridView1" runat="server" ClientIDMode="AutoID"
AutoGenerateColumns="false">
<Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:Label runat="server" ID="Label1" Text='<%# Bind("Isim") %>' />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField>
<ItemTemplate>
<asp:Label runat="server" ID="Label2" Text='<%# Bind("Sirket") %>' />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>

ClientIDMode="AutoID"
Hitman
IO Interactive
Crysis
Crytek Studios
Assassin's Creed
Gingerbread Studios

ClientIDMode="Inherit"
Hitman
IO Interactive
Crysis
Crytek Studios
Assassin's Creed
Gingerbread Studios

ClientIDMode="Predictable"
ClientIDRowSuffix="Isim”
Hitman
IO Interactive
Crysis
Crytek Studios
Assassin's Creed
Gingerbread
Studios

ClientIDMode="Static"
Hitman
IO Interactive
Crysis
Crytek Studios

ClientIDMode (Control Level)
<asp:GridView
ID="GridView1"
runat="server"
ClientIDMode="AutoID"
AutoGenerateColumns="false">
</asp:GridView>

ClientIDMode (Page Level)
<%@ Page Language="C#"
AutoEventWireup="true"
ClientIDMode="Predictable"
CodeBehind="ClientID2.aspx.cs"
Inherits="ASPNET4.ClientID2" %>

ClientIDMode (Application Level)
<system.web>
<pages clientIdMode="Predictable"></pages>
</system.web>

Routing
 ASP.NET MCV
 System.Web.Routing;
 http://www.mysite.com/products/software
 http://www.mysite.com/
products.aspx?category=software

Routing
void Application_Start(object sender, EventArgs e)
{
RouteTable.Routes.Add("Product",
new Route("Products/{category}",
new PageRouteHandler("~/Products.aspx")));
}

Routing
RouteParameter
<asp:SqlDataSource ID="SqlDataSource1" runat="server">
<SelectParameters>
<asp:RouteParameter Name="Category" RouteKey="category" />
</SelectParameters>
</asp:SqlDataSource>

Runat=“server”
 Is it dead?
 Code snippet
 Textbox + tab
 Label + tab

List View Control Enhancement
 Come with ASP.NET 3.5
 Does not require a layout template
 Has all the functionality of the GridView control
 Gives you complete control over the output
 <asp:ListView ID="ListView1" runat="server">
<ItemTemplate>
<% Eval(“Isim")%>
</ItemTemplate>
</asp:ListView>

Form View Control Enhancement
 .NET 3.x and earlier versions notation
<asp:FormView ID="FormView1" runat="server">
<ItemTemplate>ASP.NET 4</ItemTemplate>
</asp:FormView>
 At browser
<table cellspacing="0" border="0" id="FormView1"
style="border-collapse:collapse;">
<tr>
<td colspan="2"> ASP.NET 4</td>
</tr>
</table>

Form View Control Enhancement
New player : RenderOuterTable
<asp:FormView ID="FormView2" runat="server"
RenderOuterTable="false">
<ItemTemplate>ASP.NET 4</ItemTemplate>
</asp:FormView>
ASP.NET 4

CheckBoxList & RadioButtonList
 ASP.NET 3.x and earlier
 RepeatLayout
 Flow
 Table
 ASP.NET 4
 RepeatLayout
 Flow
 Table
 OrderedList
 UnorderedList

ChartControl
 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.
 Smart data labels that can automatically fit around data points.
 Strip lines, scale breaks, and logarithmic scaling.
 More than 50 financial and statistical formulas for data analysis and
transformation.
 Simple binding and manipulation of chart data.
 Support for common data formats, such as dates, times, and currency.
 Support for interactivity and event-driven customization, including
client click events using AJAX.
 State management.
 Binary streaming.

Web.config File Minification
 New .NET Framework bigger web.config
 Tell Visiual Studio which framework version targeting
<?xml version="1.0"?>
<configuration>
<system.web>
<compilation targetFramework="4.0" />
</system.web>
</configuration>
 Major config elements moved to machine.config

Browser Capabilities
 HttpBrowserCapabilities
 Now supports for
 Google Chrome
 Research in Motion BlackBerry,
 Apple iPhone.
 Using for detect supporting Javascript version or page
requested by a mobile device.

Persisting Row Selection
in Data Controls
 Gridview and ListView
 EnablePersistedSelection
 <asp:GridView id="GridView2" runat="server"
EnablePersistedSelection="true"></asp:GridView>

Disabling Controls
 controlRenderingCompatibilityVersion
 Set to 4.0
 Test
 <asp:Label id="Label" runat="server" Text="Test"
Enabled="false">
 Set to 3.5
 Test

Menu Control Improvements
Runders as unordered list
<div id="Menu1">
<ul>
<li><a href="#" onclick="...">Home</a></li>
<li><a href="#" onclick="...">About</a></li>
</ul>
</div>

Extensible Output Caching
 Enables you to configure one or more custom output-cache
providers
 Output-cache providers can use any storage mechanism to
persist HTML content including local or remote disks, cloud
storage, and distributed cache engines
 Output-cache providers can use any storage mechanism to
persist HTML content
 System.Web.Caching.OutputCacheProvider

Global.asax :
public override string GetOutputCacheProviderName
(HttpContext context)
{
if (context.Request.Path.EndsWith("Advanced.aspx"))
return "DiskCache";
else
return
base.GetOutputCacheProviderName(context);
}

Permanently Redirecting a Page
 Response.Redirect : HTTP 302 (Temporary Redirect)
 RedirectPermanent : HTTP 301 (Permenant Redirect)
 RedirectPermanent("/newpath/foroldcontent.aspx");
 Search engines and other user agents that recognize
permanent redirects

Extensible Request Validation
 Cross-site scripting (XSS) attacks
 We can use custom request-validation logic
 <httpRuntime requestValidationType="Samples.MyValidator,
Samples" />
public class CustomRequestValidation : RequestValidator
{
protected override bool IsValidRequestString(
HttpContext context, string value,
RequestValidationSource requestValidationSource,
string collectionKey,
out int validationFailureIndex)
{...}
}

Contact :
erkan@erkanbalaban.com.tr

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