Difference between revisions of "OOP Class8"

Revision as of 16:26, 2 November 2006

Motorvehicle Diagram

Oop Motorvehicle Diagram

http://iam.colum.edu/oop/browser/browser.aspx?f=/classsource/class7/Motor

Anatomy of an aspx page

Page Directive The page directive must be on the first line of an aspx page. It consists of Name/Value Pairs and sets parameters that will be used throughout the execution of the page ie. the language.

<%@ Page language="c#" debug="True" trace="False"%>

C# Code may be embedded in the page using script tags similar to javascript

<script language="c#" runat="server"> </script>

Notice the runat attribute is set to 'server'. This is what makes the code execute on the server rather than be parsed by the client.

Console applications start executing in the main method

<csharp>public static void Main() {}</csharp>

The .Net Framework can also execute on the web. Rather than having a Main method a web page starts it's execution with a method called Page_Load

<csharp>public Page_Load { }</csharp>

There are actually several method that are executed in an aspx page.

http://samples.gotdotnet.com/quickstart/aspplus/

Simple Aspx Page

http://iam.colum.edu/oop/classsource/class8/Aspx/hello.aspx hello.aspx

http://iam.colum.edu/oop/classsource/class8/Aspx/hello2.aspx hello2.aspx

http://iam.colum.edu/oop/classsource/class8/Aspx/Label.aspx Label.aspx

In class
Build three hello aspx pages similar to the ones above

Dogs on the web

DogWeb

Courses on the Web

Student Web

Response Object

Response.Write()

http://iam.colum.edu/oop/classsource/class10/Response/Response1.aspx Response1.aspx - source

Response.End()

http://iam.colum.edu/oop/classsource/class10/Response/Response2.aspx Response2.aspx - source

Response.Clear()

http://iam.colum.edu/oop/classsource/class10/Response/ResponseClear.aspx ResponseClear.aspx - source

Response.Flush()

http://iam.colum.edu/oop/classsource/class10/Response/ResponseFlush.aspx ResponseFlush.aspx - source

Debugging with response object

Using the response buffer can be extreemely usefull for debugging. Sometime you may have to setup a small debug system to help catch errors in object that do not inherit from System.UI.Page.

Response.Flush()

http://iam.colum.edu/oop/classsource/class10/Response/ResponseDebug.aspx ResponseDebug.aspx - source

Home Work

Convert one of your classes to work as an aspx page.

Have a nice break....