A Introduction to Code behind
Code behind is what is called coding separation, and since Microsoft launched ASP.net, code behind is a hot topic. In a generic asp.net file, the Code Behind mainly uses two files to create a asp.net page, one is the design file, generally with. aspx or. ascx as the extension, and the other is the program code file, generally with. vb or. cs as extension, its programming language is mainly vb.net or C #。
Two Code behind advantages
The user who has programmed the ASP has known that the ASP program is a mix of interface design and programming. Therefore, when the program designer to modify the application interface layout, it is often necessary to change a large number of interface-independent code, for a small program, the workload is not very large, if the code for a large number of programs, is a workload is not small things. and code behind the interface design and programming code to separate files, for the re-use of code, program debugging and maintenance are revolutionary. Another point is that when you publish your site, you can use this technology to effectively protect your code. This is an improvement on the security of the program. The Code behind technology appears a bit like the past VB or Delphi appears the same. That's why he became a hot topic as soon as he appeared. Below we use a complete example to specify the characteristics of the code behind technology.
Three Introduction to Examples
The operating environment for this example is the Windows Prefessional version and the. Net FrameWork SDK Beat 2. The programming language is C #, whose primary function is to send e-mail. The program is divided into two parts, the interface code to send e-mail to the mail.aspx file to save, and send the program is Send.cs file to save.
Four Concrete implementation Steps
1). Create a new HTML page
You can use Microsoft's fontpage to design the entire layout of your page. All of your options are designed into this page. The specific interface is shown below:
The
Names this HTML file as send.htm. The specific code is as follows:
<meta http-equiv= "Content-type" content= "text/html; charset=gb2312"
<meta name= "generator" content= "Microsoft FrontPage 4.0"
<meta name= "ProgId" content= "FrontPage . Editor.document
<title>new Page 1</title>
<body>
<form>
<table border= "1" width= "100%"
<tr>
<t D width= "100%" colspan= "2" > Please fill in the following: </td>
</tr>
<tr>
<td width= "35%" > Name </t D>
<td width= "65%" ><input type= "text" name= "name" size= "
</td>
</TR>
<tr>
<td width= "35%" > E-mail address </td>
<td width= "65%" ><input type= "text" Name= "Ema Il "size="
</td>
</tr>
<tr>
<td width= "35%" > Content </td>
<TD width= "65%"
<textaRea rows= "7" name= "message" cols= ""
</textarea>
</td>
</tr>
<tr>
<td width= "100%" colspan= "2"
<input type= "Submit" value= "Submit" Name= "B1" ></TD>
</tr>
</table>
</form>
<p></p>
</body>
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