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Graphs in VML

Posted on 2002-03-26
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Last Modified: 2008-02-26
Has anyone got a simple example of how I can dynamically produce a bar chart on a web page based on a differing recordset - using VML

I need a simple example where I can specify the limits of the X and Y axis and the differing height of 3 bars.

I believe VML is the best way to do this. If not what other options are there without any client side requirements.

Thanks
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Question by:carlmc
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3 Comments
 
LVL 3

Expert Comment

by:barryfandango
ID: 6896920
carlmc,

If your graphing needs are relatively simple, you could generate a simple HTML table to create your graph, in the form of a horizontal bar chart.  This would guarantee client-side compatibility.

i.e. given a recordset rs with two fields, "name" and "value,"

...
<table width=100%>
<%
xlimit = 100
do while not rs.eof
  %>
  <tr><td align=right><%=rs("name")%></td><td>

  <table width=100% bgcolor=blue><tr><td width=<%=(rs("value")/xlimit)*100 %></td><td></td></tr></table>

  </td><td></td></tr>
  <%
loop
%>
</table>
...

You could add modifications to cycle the color as well.
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LVL 3

Accepted Solution

by:
barryfandango earned 200 total points
ID: 6897116
And here is an example of a vertical bar chart :

...
<table cellpadding=5>
<tr>
<%
ylimit = 100
tableheight = 300
do while not rs.EOF
%>
<td valign=bottom>
<table height=<%=(rs("value")/ylimit)*tableheight%> bgcolor=blue><tr><td>&nbsp;&nbsp;&nbsp;&nbsp;</td></tr></table>
</td>
<%
loop
%>
</tr><tr>
<%
rs.movefirst
do while not rs.eof
%>
<td><%=rs("name")%></td>
<%
loop
%>
</tr></table>
...

if you take advantage of the various table parameters (ie cellpadding, etc) you have considerable formatting options.  To change the width of the bars, increase or decrease the number of "&nbsp"'s in each one.  To change the spacing between them, modify the cellpadding parameter, etc etc.
0
 
LVL 3

Expert Comment

by:barryfandango
ID: 6910877
carlmc,

do these help answer your question?  Is there any other information you need?
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