What is ASP.NET?
Examples ASP.Net Technology ASP.NET Document Examples Difference between ASP.NET and ASP ASP.NET Element Examples ASP.NET Mechanism ASP.NET Additional Information
What is ASP.NET?
ASP.NET is .........
ASP stands for Active Server Pages
ASP.NET is a server side technology that built on the .NET technology from Microsoft.com
ASP.NET files use the extension ".aspx" to activate the supported web server to compile the ASP.NET files
ASP.NET also uses delimiters "<%" and "%>" as markup tags to specify the beginning and end of the enclosed script commands.
ASP.NET also supports Embedded code blocks in web pages for providing backward compatibility with ASP technology.
Examples
Examples of ASP.NET code
ASP.NET Code Input:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Sample Page</title>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8">
</head>
<body>
<%Response.Write("<p>Results on "& Request.ServerVariables("SERVER_SOFTWARE") & " .net: " & System.Environment.Version.ToString & " " & ScriptEngine & " Version " & ScriptEngineMajorVersion & "." & ScriptEngineMinorVersion & "</p>")%>
<% Response.Write ("<h1>This is a Sample ASP.NET Code</h1>") %>
</body>
</html>
Translated HTML Code Input:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Sample Page</title>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8">
</head>
<body>
<p>Results on Microsoft-IIS/8.5 .net: 4.0.30319.42000 VB Version 14.0</p><h1>This is a Sample ASP.NET Code</h1>
</body>
</html>
HTML Web Page Embedded Output:
ASP.Net Technology
Unlike ASP technolgy, ASP.NET compile the ASP.NET document and return a HTTP document. In other words, ASP.NET technology adds an abstraction layer on top of HTTP to handle ASP.NET files and the web server becomes operating in a two-tiered way.
ASP.NET Document
Basic Features of ASP.NET files.........
ASP.NET file is a HTML script with extension ".aspx" to describe web page
ASP.NET file is just a HTML script containing ASP.NET scripts.
ASP.NET technology is just an additional script compiling engine to compile the ASP.NET file and return a HTML document.
HTML document contains HTML tags and plain text without script command can also be an ASP.NET file by renaming the extension to ".aspx"
ASP.NET technology also enables both ActiveX scripts and ActiveX server components running on the server through the .NET technology.
Examples
Examples of ASP.NET page
ASP.NET Code Input:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Sample Page</title>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8">
</head>
<body>
<%Response.Write("<p>Results on "& Request.ServerVariables("SERVER_SOFTWARE") & " .net: " & System.Environment.Version.ToString & " " & ScriptEngine & " Version " & ScriptEngineMajorVersion & "." & ScriptEngineMinorVersion & "</p>")%>
<% Response.Write ("<h1>This is a Sample ASP.NET Page</h1>") %>
</body>
</html>
Translated HTML Code Input:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Sample Page</title>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8">
</head>
<body>
<p>Results on Microsoft-IIS/8.5 .net: 4.0.30319.42000 VB Version 14.0</p><h1>This is a Sample ASP.NET Page</h1>
</body>
</html>
HTML Web Page Embedded Output:
Difference between ASP.NET and ASP
The key differences are
ASP.NET is based on a newer technology, the .NET technology, while ASP is based on the ActiveX technology.
ASP.NET is designed to manipulate the elements of a document tree in addition to the document itself, while ASP is desinged to manipulate the document as a whole.
Through the manipulate the elements of a document, the control code of ASP.NET can be easily seperated from the document tree as an individed block.
ASP.NET Element
In general, the elements of an ASP.NET document can be grouped into:
Directive block: settings for the ASP.NET engine to process ASP.NET document.<%@ Page Language="VB" %>
Script
Script declaration block: application logic
of ASP.NET document
<script runat="server">
Sub Page_Load()
lbl01.Text="Hello World"End Sub
</script>
Inline script render block: inline code and expressions of ASP.NET document.<%lbl01a.Controls.Add(New LiteralControl(("<h1>This is a Sample ASP.NET Page</h1>")))%>
Inline ASP.NET server control: the dynamic elements of ASP.NET document. These elements are used as ASP.NET bookmarks in the ASP.NET document and can be ASP.NET controls, HTML controls, and web user controls.
<asp:label id="lbl01" runat="server" />
Server-side comments: page comments or notes that will not be processed by ASP.NET engine.<%-- Set on Page_Load --%>
Litereral text and HTML tags: other HTML elements of ASP.NET document.
Examples
Examples of ASP.NET page
ASP.NET Code Input:
<%@ Page Language="VB" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Sample Page</title>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8">
<script runat="server">
Sub Page_Load()
lbl01.Text="Hello World"
End Sub
</script>
</head>
<body>
<%Response.Write("<p>Results on "& Request.ServerVariables("SERVER_SOFTWARE") & " .net: " & System.Environment.Version.ToString & " " & ScriptEngine & " Version " & ScriptEngineMajorVersion & "." & ScriptEngineMinorVersion & "</p>")%>
<p>
<%-- Set on Page_Load --%>
<asp:Label id="lbl01" runat="server" />
</p>
<% Response.Write ("<h1>This is a Sample ASP.NET Page</h1>") %>
</body>
</html>
Translated HTML Code Input:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Sample Page</title>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8">
</head>
<body>
<p>Results on Microsoft-IIS/8.5 .net: 4.0.30319.42000 VB Version 14.0</p>
<p>
<span id="lbl01">Hello World</span>
</p>
<h1>This is a Sample ASP.NET Page</h1>
</body>
</html>
HTML Web Page Embedded Output:
ASP.NET Mechanism
In general, the mechanism of ASP.NET engine in the IIS is similar to use a ASP.NET compliler to generate a HTML document. As ASP.NET supports server side include, IIS web server will first insert the content of the included file into the ASP.NET file before processing. Since ASP.NET is built on the .NET technology, a set of needed namespaces is automatically imported for all ASP.NET web pages with .aspx file extension.
System
System.Collections
System.Collections.Specialized
System.Configuration
System.Text
System.Text.RegularExpressions
System.Web
System.Web.Caching
System.Web.Profile
System.Web.Security
System.Web.SessionState
System.Web.UI
System.Web.UI.HtmlControls
System.Web.UI.WebControls
System.Web.UI.WebControls.WebParts
ASP.NET Additional Information
ASP.NET additional information ..........
https://docs.microsoft.com/en-us/aspnet/#pivot=aspnet (last
updated on 17Mar2018)