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The following demonstrates how to create
your first ASP Charts implementation. It discusses
using ASP to serve up a dynamically generated PNG image.
Other examples are provided within this website and the product/evaluation.
For more information, refer to the "Readme.htm"
and "AspReadMe.htm" files installed onto your
system with the eval/product (accessible via Start menu).
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When installing the ProEssentials evaluation and/or
product, the setup program installs the ProEssentials
DLL and ActiveX interfaces into the system directory.
Files relevant to ASP development are:
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PEGRP32D.DLL
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ProEssentials Pro DLL |
| PEGO32D.OCX |
Graph Object |
| PESGO32D.OCX |
Scientific Graph
Object |
| PE3DO32D.OCX |
3D Scientific Graph
Object |
| PEPSO32D.OCX |
Polar Object |
| PEPCO32D.OCX |
Pie Chart Object |
| PE6API.INC |
ProEssentials ASP
Include File |
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PEGRPDS.DLL
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ProEssentials Standard DLL |
| PEGODS.OCX |
Graph Object |
| PESGODS.OCX |
Scientific Graph
Object |
| PE3DODS.OCX |
3D Scientific Graph
Object |
| PEPSODS.OCX |
Polar Object |
| PEPCODS.OCX |
Pie Chart Object |
| PE6API.INC |
ProEssentials ASP
Include File |
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PEGRPDL.DLL
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ProEssentials Lite DLL |
| PEGODL.OCX |
Graph Object |
| PESGODL.OCX |
Scientific Graph
Object |
| PE3DODL.OCX |
3D Scientific Graph
Object |
| PEPSODL.OCX |
Polar Object |
| PEPCODL.OCX |
Pie Chart Object |
| PE6API.INC |
ProEssentials ASP
Include File |
The setup program
also registers the ActiveXs with the operating
system which prepares IIS for creating ProEssentials
components. You can manually register an ActiveX
with "REGSVR32.EXE" found in your system/system32
dir. You can also use this utility to manually
un-register an ActiveX by using the "-u"
command. Un-Registering is useful when you want
to test CAB download/installation issues on your
development machine.
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<HTML>
<HEAD></HEAD>
<BODY>
<P>Run ASP Server Script via IMG src</P>
<IMG src = "myfirst.asp">
</BODY></HTML>
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Open Notepad
and enter the code shown to the left.
For simplicity, we recommend the IMG src line reference
just a file name, with no path, but make sure
to save files into the wwwroot dir.
Name this file
"MyFirst.htm". Your server's local root directory is commonly
C:\Inetpub\wwwroot.
This simple web page
contains a single line paragraph followed by an
image. The image's src is pointing to an ASP page
"MyFirst.asp" which causes server-side
code to execute and send back the image in a binary
stream, ideal for web-farm environments.
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<%
dim myobj
Set myobj = server.CreateObject("PEGOD.Pegodctrl.1")
myobj.MainTitle = "Hello Internet"
myobj.SubTitle = ""
myobj.PrepareImages = True
myobj.Subsets = 4
myobj.Points = 12
dim i
dim j
for i = 0 to 3
for j = 0 to 11
myobj.YData(i,j)
= 5 + Rnd(20)
next
next
Response.BinaryWrite (myobj.PNGToStream(300,300))
Set myobj = Nothing
%>
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Using
NotePad, create
another file called "MyFirst.asp" and enter the corresponding
code shown to the left.
Again, save this file
into your web server's local root directory as
you did with "MyFirst.htm".
Note the entire contents
of "MyFirst.asp" are within <% ... %> tags. Make sure no spaces or ascii exist before or after tags!!!!!
"MyFirst.asp" contains ASP code (VBScript)
which creates a ProEssentials component via the
CreateObject method. CreateObject's only argument
is a ClassID. In this case, PEGOD.Pegodctrl.1
is the ClassID for the ProEssentials Graph Object.
Note, Standard users use PEGODSTD.PegodStdCtrl.1
and Lite users use PEGODLITE.PegodLiteCtrl.1
Next,
the code sets the control's MainTitle and SubTitle properties.
Next, Subsets
and Points properties are set and define the amount
of data the control will contain.
Then,
a nested for-next loop passes 48 random data points
into the YData(s,p) two dimensional property array.
Next, FontSize is set to 0 which denotes large font.
You will likely use our ProEssentials ASP Include
file and then prototype your ASP code within Visual
Basic. This lets you copy and paste your Visual
Basic code directly into an ASP page because the
include file holds the declarations for property
enumerations.
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Finally, the Response.BinaryWrite ASP function retrieves a stream
of image data from the ProEssentials PNGToStream method
and passes it to the client's browser.
If you
point your internet browser towards the file
"MyFirst.htm",
you will see a page similar to that shown to the
left.
Refer to the "ASP Readme" file accessed via the
Start menu to see more examples, including, rendering
as an ActiveX, automatic downloading the ActiveX,
client-side event scripting, and more.
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Complete online technical reference to the ProEssentials
product. Chapter 2's .NET Reference is the best mechanism
to navigate the large quantity of properties and features.
Walk-Throughs of .NET charting in VB.NET, C#.NET, ASP, VC,
VB6, and Delphi get you started quickly.
learn
more about our Asp Chart, see Chapter 3
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