ASP.NET 2.0: The Code Directory
Just as pages can be compiled dynamically at runtime, so can arbitrary code files (for example .cs or .vb files). ASP.NET 2.0 introduces the App_Code directory, which can contain standalone files that contain code to be shared across several pages in your application. Unlike ASP.NET 1.x, which required these files to be precompiled to the Bin directory, any code files in the App_Code directory will be dynamically compiled at runtime and made available to the application. It is possible to place files of more than one language under the App_Code directory, provided they are partitioned in subdirectories (registered with a particular language in Web.config). The example below demonstrates using the App_Code directory to contain a single class file called from the page.
<%@ page language="VB" %>
<script runat="server">
Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs)
Dim c As New CustomClass
Label1.Text = c.GetMessage(TextBox1.Text)
End Sub
</script>
<html>
<head>
<title>ASP.NET Inline Pages</title>
</head>
<body>
<form id="Form1" runat="server">
<h1>Welcome to ASP.NET 2.0!</h1>
<b>Enter Your Name:</b>
<asp:TextBox ID="TextBox1" Runat="server"/>
<asp:Button ID="Button1" Text="Click Me" OnClick="Button1_Click" Runat="server"/>
<br />
<br />
<asp:Label ID="Label1" Text="Hello" Runat="server" />
</form>
</body>
</html>
Imports Microsoft.VisualBasic
Public Class CustomClass
Public Function GetMessage(ByVal name As String) As String
Return "Hello " & name
End Function
End Class
0 Response to "ASP.NET 2.0: The Code Directory"
Post a Comment