ASP.NET Tutorial/ASP.Net Instroduction/Introduction

Материал из .Net Framework эксперт
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ASP.NET reserved application folders

Folder Name Description 
App_Browsers Contains browser definition files (which are XMLbased files with the .browser extension) used by this application for 
identifying and determining the capabilities of browsers. 
App_Code Contains any noncodebehind class files to be used by the application.
App_Data Contains application data files, such as SQL Server Express data, Microsoft Access files, or XML data. 
App_GlobalResources Contains resource files that are available globally throughout 
the application.
App_LocalResources Contains resource files that are associated with a specific page or control.  
App_Themes Contains files that define the appearance of pages and controls in the site.
App_WebReferences Contains files used to define references to external Web services. 
Bin Contains compiled .NET assemblies (.DLL files).


Notable ASP.net file extension

Extension Description 
  .asax     The Global.asax file defines application-level event handlers. 
  .ascx     Defines a user control. User controls are used to encapsulate a block of reusable user interface functionality.
  .ashx     Defines a custom HTTP handler. Handlers are used to implement custom response functionality based on the extension of the request. 
  .asmx     Defines an XML Web service. 
  .aspx     Defines a Web Form. 
  .axd      Special handlers used to manage Web site administration requests. 
  .config   An XML-based configuration file (named Web.config) for an application or for the machine itself (machine.config). 
  .master   Defines a master page that specifies the common layout for other Web Forms. 
  .resx     Resource file containing resource strings used for localization. 
  .sitemap  Defines the navigation structure of the site. 
  .skin     Defines the visual property settings to be applied to controls in a site"s theme.


The ASP.NET Framework gives you the most commonly used namespaces

System
          System.Collections
          System.Collections.Specialized
          System.Configuration
          System.Text
          System.Text.RegularExpressions
          System.Web
          System.Web.Caching
          System.Web.SessionState
          System.Web.Security
          System.Web.Profile
          System.Web.UI
          System.Web.UI.WebControls
          System.Web.UI.WebControls.WebParts
          System.Web.UI.HTMLControls
          System.Web.Extensions
          System.Xml.Linq
          System.Data.DataSetExtensions
The default namespaces are listed inside the pages element in the root web configuration file 
located at the following path:
\WINDOWS\Microsoft.NET\Framework\v2.0.50727\CONFIG\Web.Config          

Before you can use a class contained in an assembly in your application, 
you must add a reference to the assembly. 
By default, an ASP.NET application references the most common assemblies contained in the Global Assembly Cache:
          mscorlib.dll
          System.dll
          System.Configuration.dll
          System.Web.dll
          System.Data.dll
          System.Web.Services.dll
          System.Xml.dll
          System.Drawing.dll
          System.EnterpriseServices.dll
          System.Web.Mobile.dll


Your first ASP.net page

<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
    void Page_Load()
    {
        lblServerTime.Text = DateTime.Now.ToString();
    }
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
    <title>First Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    The current date and time is:
    <asp:Label
        id="lblServerTime"
        Runat="server" />
    </div>
    </form>
</body>
</html>

The first line contains a directive. It looks like this:
<%@ Page Language="C#" %>

The code declaration block contains all the methods used in the page. 
It contains all the page"s functions and subroutines. 

<script runat="server">
    void Page_Load()
    {
        lblServerTime.Text = DateTime.Now.ToString();
    }
</script>
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