Create dynamic WAP pages with WML and ASP - By Michael Wright
In my last set of articles I told you how to getstarted with WML and gave a brief explanation of how ASP can beimplemented into WML code. Please read these articles before this oneby going to http://www.aspfree.com/authors/michaelw/wap/default.asp.This article will give examples of implementing ASP into WML code andshow you how to make your WAP site change as your normal website doesevery time you update your MS Access databases.
So, you have created your WAP site and have started updating itevery time you update your regular website but it’s just taking so longto do. One of the easiest ways to update a website is to make itdynamic so that when you update one element of the site another thingchanges in conjunction with it. For example, if you were to create anews section within your website you could have a start page displayingthe headlines, which if the user clicked a headline another page woulddisplay the whole article. All the data would be grabbed from adatabase with simple fields like ID, Date, Headline and Article.
Now, if you can create a HTML/ASP version ofthe above then it’s relatively simple to create a WML/ASP version. Ifyou do not know how to create a HTML/ASP version of the above then youshould learn that first by going to http://www.aspfree.com/demos.asp and check out the ASP-DATABASE section. To view a live version of a news section please go to http://www.vetsonline.com/html/news.htm.
Below is an example of how to create the WML/ASP version (you shouldchange all the words in the ASP code in Red where appropriate):
<% Response.ContentType = "text/vnd.wap.wml" %><?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN" "http://www.wapforum.org/DTD/wml_1.1.xml">
<wml>
<!-- THIS IS THE MAIN CARD OF THE DECK -->
<card id="MainCard">
<p align="left"><small><b>NEWS STARTPAGE WAP EXAMPLE </b></small></p>
<%
strconn = "DRIVER=Microsoft Access Driver (*.mdb);DBQ=" & Server.MapPath("LOCATION OF DATABASE")
set conn = server.createobject("adodb.connection")
conn.open strconn
set rs = server.createobject("adodb.recordset")
QueryDate = "July 2000" 'enter this months date or for daily news, todays date e.g. Date()
Query = "Select * from DATABASE TABLE Where FIELD NAME LIKE '%" &QueryDate &"%' ORDER BY id"
rs.open Query, conn
if not rs.eof Then
rs.movefirst
Do While NOt Rs.EOF
id = rs("id") 'read each id as it displays the headlines
%>
<p align="left"><small><anchor><%=rs("Headline")%><go href="ASP PAGE TO VIEW ARTICLE.asp?id=<%=id%>"/></anchor></small></p>
<%
rs.movenext
Loop
else
response.write("<p align='left'><small>There are no news articles this month as yet.</small></p>")
End if
' close everything
rs.close
Set conv = nothing
set rs= nothing
set conn = nothing
%>
<p align="left"><small><a href="PREVIOUS PAGE ">Back</a></small></p>
</card>
</wml>
You must now create the WML/ASP page to display the actual articleswhere you are linking the Headlines. Below is an example of this:
<% Response.ContentType = "text/vnd.wap.wml" %><?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN" "http://www.wapforum.org/DTD/wml_1.1.xml">
<wml>
<!-- THIS IS THE MAIN CARD OF THE DECK -->
<card id="MainCard">
<%
id = Request.QueryString("id")
dim conn
dim rs
dim strsql
dim strconn
strconn = "DRIVER=Microsoft Access Driver (*.mdb);DBQ=" & Server.MapPath("LOCATION OF DATABASE")
set conn = server.createobject("adodb.connection")
conn.open strconn
set rs = server.createobject("adodb.recordset")
Query = "Select * from DATABASE TABLE Where ID ="&id&" ORDER BY ID"
rs.open Query, conn
rs.movefirst
Do While NOt Rs.EOF
%>
<p align="left"><small><b><%=rs("Headline")%></b></small></p>
<p align="left"><small><%=rs("Article")%></small></p>
<%
rs.movenext
Loop
close everything
rs.close
set rs= nothing
set conn = nothing
%>
<p align="left"><small><a href="PREVIOUS PAGE">Back</a></small></p>
</card>
</wml>
Now you can try out your WAP site and link the new news section toyour WAP site. The next time you change your database your WAP sitewill now change along with your regular website. One of the best thingsyou can do when creating WAP sites is to keep it simple and if you areworking with databases keep them simple. It is also best to test yourWAP code first before implementing ASP otherwise it will get confusing.
I hope this article has been of some use to you all and in my next Iwill be showing ways of how to improve to above code to make it evenmore dynamic!
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