ASP.NET inline expressions

2009-10-19

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<% ... %> embedded code blocks

<html>
<body>
    <form id="form1" runat="server">
    <% For i As Integer = 16 To 24 Step 2%>
    <div style="font-size: <% Response.Write(i)%>">
        Hello World<br />
    </div>
    <% Next%>
    </form>
</body>
</html>

```
  
```




  <html>
<body>
    <form id="form1" runat="server">
    <%=DateTime.Now.ToString() %>
    </form>
</body>
</html>
  


  
      




  @ Page

  Defines page-specific attributes used by the ASP.NET page parser and compiler. Can be included only in .aspx files.

  @ Control

  Defines control-specific attributes used by the ASP.NET page parser and compiler. Can be included only in .ascx files (user controls).

  @ Import

  Explicitly imports a namespace into a page or user control.

  @ Implements

  Declaratively indicates that a page or user control implements a specified .NET Framework interface.

  @ Register

  Associates aliases with namespaces and class names, thereby allowing user controls and custom server controls to be rendered when included in a requested page or user control.

  @ Assembly

  Links an assembly to the current page during compilation, making all the assembly's classes and interfaces available for use on the page.

  @ Master

  Identifies an ASP.NET master page.

  @ WebHandler

  Identifies an ASP.NET IHttpHandler page.

  @ PreviousPageType

  Provides the means to get strong typing against the previous page as accessed through the PreviousPage property.

  @ MasterType

  Assigns a class name to the Master property of an ASP.NET page, so that the page can get strongly typed references to members of the master page.

  @ OutputCache

  Declaratively controls the output caching policies of a page or user control.

  @ Reference

  Declaratively links a page or user control to the current page or user control.



  
      




  <script runat="server">
    Protected Function SayHello() As String
        Return "Hello World"
    End Function

    Protected Sub Page_PreRender(ByVal sender As Object, ByVal e As System.EventArgs)
        lblHello.DataBind()
    End Sub
</script>
<html>
<body>
    <form id="form1" runat="server">
    <asp:Label ID="lblHello" runat="server" Text="<%# SayHello%>"></asp:Label>
    </form>
</body>
</html>



  <%$ ... %> expression builder (<%$ Expression Prefix: Expression Value %>)



   

  <appSettings>
    <add key="copyright" value="(c) Copyright 2009 WebSiteName.com"/>
</appSettings>

The expression builder in the ASP.NET Web Form page:
<div id="footer">
    <asp:Literal ID="Literal1" runat="server" Text="<%$ AppSettings: copyright %>"></asp:Literal>
</div>



  <%-- ... -- %> server-side comments block



  <script runat="server">
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
        Dim strName As String
        strName = Session("userName")
        lblUserName.Text = strName
    End Sub
</script>
<html>
<body>
    <form id="form1" runat="server">
    <%-- Label for UserName --%>
    <asp:Label ID="lblUserName" runat="server" Text=""></asp:Label>
    </form>
</body>
</html>




  參考自:http://www.kbalertz.com/976112/Introduction-inline-expressions-Framework.aspx



 

 


                    
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ASP.NET inline expressions

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